SI2457-C-FS Silicon Laboratories Inc, SI2457-C-FS Datasheet
SI2457-C-FS
Specifications of SI2457-C-FS
Available stocks
Related parts for SI2457-C-FS
SI2457-C-FS Summary of contents
Page 1
... The ISOmodem family of products is a complete modem ranging in speed from 56,000 bps to 2400 bps. Offered as a chipset with the Si2457, Si2434, Si2415, or Si2404 system-side device and the Si3018/10 line-side device, the ISOmodem utilizes Silicon Laboratories’ patented direct access arrangement (DAA) technology to provide a programmable telephone line interface with an unparalleled level of integration ...
Page 2
... Si2457/34/15/04 2 Rev. 1.1 ...
Page 3
... Section 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3. Bill of Materials: Si2457/34/15/04 Chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1. Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.2. Parallel Interface (24-Pin Version Only 4.3. Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.4. Data Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5. Fast Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.6. V.80 Synchronous Access Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7. Clocking/Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4 ...
Page 4
... The Si2457/34/15/04 specifications are guaranteed when the typical application circuit (including component tolerance) and any Si2457/34/15/04 and any Si3018 are used. See "2. Typical Application Schematic" on page 10. 2. All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions. ...
Page 5
... D = –40 to +85 °C for G-grade) A Symbol Test Condition – pin D D3.3 I PDN = 1 D Rev. 1.1 Si2457/34/15/ Min Typ Max Unit 2.0 — — V — — 0.8 V 2.4 — — V — — 0.35 V –10 — 10 µA 50 125 200 kΩ 50 125 200 kΩ ...
Page 6
... Si2457/34/15/04 Table 4. AC Characteristics (V = 3 °C for F-grade Parameter Sample Rate Clock Input Frequency Clock Input Frequency Receive Frequency Response Receive Frequency Response 1 Transmit Full Scale Level 1,2 Receive Full Scale Level 3 Dynamic Range 3 Dynamic Range 3 Dynamic Range Transmit Total Harmonic ...
Page 7
... Table 5. Absolute Maximum Ratings Parameter DC Supply Voltage Input Current, Si2457/34/15/04 Digital Input Pins Digital Input Voltage CLKIN/XTALI Input Voltage Operating Temperature Range Storage Temperature Range Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded. Functional operation should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
Page 8
... Si2457/34/15/04 UART Time for Modem Receive Path (8N1 Mode) 8-B it Data M ode tart RTS UART Timing for Modem Transmit Path (9N1 Mode with 9th Bit Escape) 9-B it Data M ode tart CTS Figure 2. Asynchronous UART Serial Interface Timing Diagram Rev. 1 top D6 D7 ...
Page 9
... CSS ADDRESS = RLDD D[7:0] Figure 3. Parallel Interface Read Timing t CSS ADDRESS = D[7:0] Figure 4. Parallel Interface Write Timing t CSH VALID DATA t CSH DSU t DH VALID DATA Rev. 1.1 Si2457/34/15/04 VALID DATA t RLDD VALID DATA 9 ...
Page 10
... Si2457/34/15/04 2. Typical Application Schematic + IGND GND 12 Rev. 1.1 ...
Page 11
... VDB 19 VDA 7 3.3 VD GND 21 20 VD3.3 GND 5 6 Rev. 1.1 Si2457/34/15/ IGND 15 11 ...
Page 12
... Y1 Z1 Notes: 1. C52 and C53 should not be populated with the Si2457/34/15/04 16-pin package option STB applications, C40, C41, and Y1 can be removed by using the 27 MHz clock input feature. 3. Several diode bridge configurations are acceptable. For example, a single DF04S or four 1N4004 diodes may be used. 4. Murata BLM21AG601SN1 may be substituted for R15– ...
Page 13
... Data Format Bit asynchronous Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Si2457/34/15/04 Specification 1 ITU-T V.90 1 ITU-T V.90 1 ITU-T V.90 1 ITU-T V.90 1 ITU-T V ...
Page 14
... Bell 103 Originate mode Answer mode Output Level Permissive—Switched network Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. 14 Specification 1 2 ITU-T V.90 , V.34 , V.32bis, V.32, V.23, V.22bis, V.22, V.21, Bell 212A, and Bell 103 Two-wire full duplex V ...
Page 15
... Dialing DTMF Output Level Pulse Dial Ratio Ring Cadence Call Progress Monitor Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Si2457/34/15/04 Specification As specified by ITU-T As specified by ITU-T 1800 Hz ±7 Hz 1800 Hz ±7 Hz 1700 Hz ±7 Hz 2400 Hz ±7 Hz 1200 Hz ± ...
Page 16
... I/O Control 0 (U70). To ensure backward compatibility when using a 24-pin system side option pulldown resistor ≤10 kΩ is placed between D2 (Si2457/34/15/04, pin 18) and GND (Si2457/34/15/04, pin 6), the DTE rate is set to a 19.2 kbps baud rate (see Table 8). 4.1.1. Autobaud with the ...
Page 17
... Additionally, the Si2457/34/15/04 may be placed in a complete powerdown mode or wake-on-ring mode. Complete powerdown U65[13] (PDN). Once the PDN bit is written, the Si2457/ 34/15/04 completely powers down and can only be powered back on via the RESET pin. 4.8. Data Compression The modem can achieve DTE (host-to-ISOmodem) ...
Page 18
... Wire Mode Wire mode is used to communicate with standard non- error correcting modems. When optioned with \N3, the Si2457/34/15/04 falls back to wire mode if it fails in an attempt to negotiate a V.42 link with the remote modem. Error correction and data compression are not active in wire mode ...
Page 19
... Si2457/34/15/04 goes off- hook. This allows the Si2457/34/15/04 to detect connected to an improper telephone line. The overcurrent detection feature may be enabled by setting the OCDM bit (U70, bit 11). OHT (U77, bits 8:0) sets the delay after off-hook until the loop current is measured. ...
Page 20
... EEPROM Mode 3 with a 16-bit (8–64 kbit range) address. Upon powerup pulldown resistor ≤10 kΩ is placed between D6 (Si2457, pin 4) and GND (see Table 8), the ISOmodem attempts to detect an EEPROM. The EEPROM is intended first for setting custom defaults, second for ...
Page 21
... POLARITY REVERSAL” polarity reversal was not detected. In each case, the result code is followed by “OK”. If the S7 timeout occurs before a busy tone is detected, the Si2457/34/15/04 will report “NO CARRIER”. Polarity reversal monitoring begins after the last digit is dialed and ends when the busy tone is detected or S7 timeout occurs ...
Page 22
... Command Go off-hook. H1 Identification and checksum. In Display Si2457/34/15/04 revision code Revision B C: Revision C, etc. Display Si2457/34/15/04 firmware revision code (numeric). I1 Display line-side revision code. I3 18C = Si3018 revision C Display the ISOmodem® model number. I6 “2404” = Si2404 “2415” = Si2415 “2434” = Si2434 “ ...
Page 23
... Command Call Progress Monitor (CPM)—This command controls which CPM signals are monitored Xn and reported to the host from the Si2457/34/15/04. (See Table 14 on page 36.) Basic results; disable CPM—Blind dial (does not wait for dial tone). CONNECT message X0 does not include speed. ...
Page 24
... Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +DR=X Data compression reporting. X Mode 0 Disabled 1 Enabled If enabled, the intermediate result code is transmitted at the point after error control negotia- tion. The format of this result code is as follows: Result code +DR:NONE +DR:V42B ...
Page 25
... FCLASS = 0 must be sent to restore the ISOmodem® to normal operation after test. 54 Same as &T4, but transmit V.29 9600 bps. Data pattern set by S40 register FCLASS = 0 must be sent to restore the ISOmodem to normal operation after test. 95 V.29 short synchronous. 96 V.29 full synchronous. Si2457/34/15/04 Action Rev. 1.1 25 ...
Page 26
... Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Country settings - Automatically configure all registers for a particular country. +GCI = X X Country 0 Japan 9 Australia A Austria F Belgium 16 Brazil 1B Bulgaria 20 Canada 26 China 27 Columbia 2E Czech Republic 31 Denmark 35 Ecuador 3C Finland 3D France 42 Germany 46 Greece 50 Hong Kong ...
Page 27
... Action e.g. +MRR: 14400 ITU-T V.21 ITU-T V.22 ITU-T V.22bis (default for Si2404) ITU-T V.32 ITU-T V.32bis (default for Si2415) ITU-T V.34 (default for Si2434) ITU-T V.90 (default for Si2457) Disabled Enabled Rev. 1.1 Si2457/34/15/04 27 ...
Page 28
... Si2457/34/15/04 Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Controls the action to be taken upon detection of call waiting. +PCW = X X Mode 0 Toggle RI and collect type II Caller ID if enabled by +VCID. 1 Hang up. 2 Ignore call waiting. Caller ID Type. +VCDT = X X Mode 0 After ring only ...
Page 29
... Extended AT Commands The extended AT commands are supported by the Si2457/34/15/04 and are described in Tables 11 through 13. Table 11. Extended AT& Command Set (Command Defaults in Bold) Command Display AT& current settings. &$ ESC is not used &D0 ESC escapes to command mode from data mode if also enabled by HES U70, bit 15. ...
Page 30
... Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the &T2 DSP (Si2457/34/15/04 device) only. ISOmodem® echoes data from TX pin (Register 0 in parallel mode) back to RX pin (Register 0 in parallel mode). Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the & ...
Page 31
... After the %V1 and %V2 commands are issued, the Si2457/34/15/04 will automatically check the telephone connection for whether or not a line is present line is present, the Si2457/34/15/04 will automatically check if the line is already in use. Finally, the Si2457/34/15/04 will check line status both before going off-hook and again before dialing. %V1 uses the fixed method, and %V2 uses the adaptive method ...
Page 32
... NLIU) < LCVS The NLIU register is updated every 1 ms with the minimum non-zero value of LVCS in the last 30 ms. This allows the Si2457/34/15/04 to eliminate errors due to 50/60 Hz interference and also adapt to relatively slow change in the on-hook dc reference value on the telephone line. This algo- rithm does not allow any non-zero values for NLIU below 0x0007 ...
Page 33
... V.42 auto-reliable—The Si2457/34/15/04 attempts to connect with the V.42 protocol. If unsuc- cessful, the MNP protocol is attempted. If unsuccessful, wire mode is attempted. \N4 V.42 (LAPM) reliable mode (or drop call)—Same as \N3 except that the Si2457/34/15/04 drops the call instead of connecting in MNP or wire mode. \N5 V.42 and MNP reliable mode—The Si2457/34/15/04 attempts to connect with V.42. If unsuccessful, MNP is attempted ...
Page 34
... DTE rate—Change DTE rate. When the Si2457/34/15/04 is configured in autobaud mode (default), \T0 through \T15 will lock the new baud rate and disable autobaud. On the 24-pin version, the ISO- modem® is not in autobaud mode (pin 18 low on powerup), the result code “OK” is sent at the old DTE rate ...
Page 35
... When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected. This is compatible with seven data bits, no parity, two stop bits. Seven data bits, no parity, one stop bit may be forced by sending AT\T17\B1. 2. The autobaud feature does not detect this rate. Si2457/34/15/04 Action Rev. 1.1 35 ...
Page 36
... No phone line present Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434 the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. ...
Page 37
... Link established at 50666 Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434 the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. ...
Page 38
... DTMF dial attempted on a pulse dial only line Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434 the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading < ...
Page 39
... Carriage return character. 4 Linefeed character. 5 Backspace character. 6 Dial tone wait timer—Number of seconds the Si2457/ 34/15/04 waits before blind dialing. Only applicable if blind dialing is enabled (X0, X1, X3). 7 Carrier wait timer—Number of seconds the Si2457/34/ 15/04 waits for carrier before timing out. This register also sets the number of seconds the modem waits for ringback when originating a call before hanging up ...
Page 40
... Si2457/34/15/04 Table 15. S-Register Description (Continued) S-Register (Decimal) 24 Sleep Inactivity Time—Sets the time that the modem operates in normal power mode with no activity on the serial port, parallel port, or telephone line before enter- ing low-power sleep mode. This feature is disabled if the timer is set to 0. ...
Page 41
... Table 15. S-Register Description (Continued) S-Register (Decimal) 42 Blacklisting—The Si2457/34/15/04 will not dial the same number more than two times in three minutes. An attempt to dial a third time within three minutes will result in a “BLACKLISTED” result code. If the blacklist memory is full, any dial to a new number will result in a “ ...
Page 42
... Si2457/34/15/04 6. User-Access Registers (U-Registers) The :U AT command is used to write these 16-bit U-registers, and the :R command is used to read them. U-registers are identified by a hexidecimal (hex) address. Register Name Description U00 DT1A0 DT1 registers set the coefficients for stage 1 of the Dial Tone Detect filter. ...
Page 43
... Busy cadence delta in seconds multiplied by 7200. U30 BMOT Busy cadence minimum on time in seconds multiplied by 7200. U31 RMTT Ringback cadence minimum total time in seconds multiplied by 7200. U32 RDLT Ringback cadence delta in seconds multiplied by 7200. Si2457/34/15/04 Rev. 1.1 Default 0x0800 0x0000 0x0000 0x0000 0x0000 0x00A0 0x6EF1 ...
Page 44
... U4C RGNX Ring cadence maximum total time in seconds multiplied by 2400. U4D MOD1 This is a bit-mapped register. U4E PRDD Pre-dial delay-time after ATD command that modem waits to dial (ms units). The Si2457/34/15/04 stays on-hook during this time. 44 ⎛ ⎞ ⎛ 1 × 2400 Hz ---------------------------------------------- - ...
Page 45
... Register Name Description U4F FHT Flash Hook Time. Time corresponding with “!” or “&” dial modifier that the Si2457/34/15/04 goes on-hook during a flash hook (ms units). U50 LCDN Loop current debounce on time (ms units). U51 LCDF Loop current debounce off time (ms units). ...
Page 46
... Si2457/34/15/04 Table 16. U-Register Description (Continued) Register Name Description U87 SAM This is a bit-mapped register U9F SASF SAS frequency detection. See “AN93: Modem Designer’s Guide” for complete details. UA0 SC0 SAS cadence 0. Sets the duration of the first SAS tone (ms). ...
Page 47
... NHFP NHFD CLPD FTP SPDM OHS2 LCS[7:0] ILIM DCR LVS[7:0] R1[4:0] CIDM OCDM PPDM RIM DCDM FACL HOI AOC DOP MINT SERM FSMS Rev. 1.1 Si2457/34/15/04 Bit Bit Bit Bit Bit Bit GT18 GT55 CTE FOH DL ACT[3:0] PDL FDT OHS DCV[1:0] ...
Page 48
... Si2457/34/15/04 6.1. Bit-Mapped U-Register Detail (defaults in bold) U4D MOD1 Bit D15 D14 D13 D12 Name TOCT NHFP NHFD Type R/W R/W Reset settings = 0x0000 Bit Name 15 Reserved Read returns zero. 14 TOCT Turn Off Calling Tone Disable Enable. 13 Reserved Read returns zero. ...
Page 49
... Enables digital loopback mode across isolation barrier only. Clear after test is terminated. 0 Reserved Must be set to 0. D11 D10 Function D11 D10 OHS2 0 R/W Function 0 Less than 0 ±10% (meets ETSI standard ±10% (meets Australia spark quenching spec) Rev. 1.1 Si2457/34/15/ FOH DL R/W R ...
Page 50
... Reserved Read returns zero. 14 PWMG PWM Gain gain gain applied to AOUT. 13 PDN Powerdown. Completely powerdown the Si2457/34/15/04 and Si3018. Once set to 1, the Si2457/34/15/04 must be reset to power on Normal Powerdown. 12:8 Reserved Read returns zero. 7:5 Reserved Must not change in a read-modify-write. 4 PDL* Powerdown Line-Side Chip ...
Page 51
... Name 15:7 Reserved Do not modify. 6 FDT* Frame Detect Indicates ISOmodem has not established frame lock Indicates ISOmodem frame lock has been established. 5:0 Reserved Read returns zero. *Note: Typically used only for board-level debug. D11 D10 FDT R Function Rev. 1.1 Si2457/34/15/ ...
Page 52
... Si2457/34/15/04 U67 ITC1 Bit D15 D14 D13 D12 D11 Name MINI[1:0] Type R/W Reset settings = 0x0008 Bit Name 15:14 Reserved Read returns zero. 13:12 MINI[1:0] Minimum Operational Loop Current. Adjusts the minimum loop current at which the DAA can operate. Increasing the minimum oper- ational loop current can improve signal headroom at a lower TIP/RING voltage ...
Page 53
... Normal receive input level Excessive receive input level. 0 BTD Billing Tone Detected. This bit is set if a billing tone is detected. This bit is cleared by writing this location billing tone Billing tone detected. Function . . Function Rev. 1.1 Si2457/34/15/ BTE ROV BTD R/W R/W R/W 53 ...
Page 54
... Si2457/34/15/04 U6A ITC4 Bit D15 D14 D13 D12 Name Type Reset settings = N/A Bit Name 15:3 Reserved Read returns zero. 2 OVL Overload Detected. This bit has the same function as ROV, but clears itself after the overload has been removed. See the “Billing Tone Detection” section in “AN93: Modem Designer’s Guide”. This bit is not affected by the BTE bit ...
Page 55
... Name Type Reset settings = 0x00FF Bit Name 15:8 Reserved Do not modify 7:0 PTMR[7:0] Parallel Port Receive FIFO Interrupt Timer. See “AN93: Modem Designer’s Guide” for details. D11 D10 R1[4:0] R/W Function D11 D10 Function Rev. 1.1 Si2457/34/15/ PTMR[7:0] R/W 55 ...
Page 56
... Parallel Phone Detect (sticky). Parallel phone detected since last off-hook event. Clears on :I read Ring Indicator. Active high bit when the Si2457/34/15/04 is on-hook, indicates ring event has occurred. Clears on :I read. 0 DCD Data Carrier Detect (status). Active high bit indicates carrier detected (equivalent to inverse of DCD pin). ...
Page 57
... If ACL = ignored by the off-hook intrusion algorithm.The ISOmo- dem will also write ACL with the contents of LVCS before an intrusion and before going on- hook (default = 0 Function D11 D10 FACL DCL[2:0] R/W Function Rev. 1.1 Si2457/34/15/ COMP R ACL[4:0] R/W D0 PRT R/W D0 ...
Page 58
... Si2457/34/15/04 U77 GEN2 Bit D15 D14 D13 D12 Name IST[3:0] Type R/W Reset settings = 0x401E Bit Name 15:12 IST[3:0] Intrusion Settling Time (250 ms units). Delay between when the ISOmodem goes off-hook and the off-hook intrusion algorithm begins. Default HOI Hang-Up On Intrusion. ...
Page 59
... CARRIER”). 13:8 Reserved Read returns zero. 7:0 IS[7:0] Intrusion Suspend (500 ms units). When this register sets the length of time from when dialing begins that the off-hook intrusion algorithm is blocked (suspended) (default = 00000000 D11 D10 Function Rev. 1.1 Si2457/34/15/ IS[7:0] R ...
Page 60
... Si2457/34/15/04 U79 GEN4 Bit D15 D14 D13 D12 Name Type Reset settings = 0x0000 Bit Name 15:5 Reserved Read returns zero. 4:0 LVCS[4:0] Line Voltage Current Sense. Represents either the line voltage, loop current, or on-hook line monitor. On-Hook Voltage Monitor (2.75 V/bit ±20%). ...
Page 61
... Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as DTMF dialtone is still present after two seconds, the Si2457/34/15/04 will redial the first digit and remaining digits as pulse dialtone is not present after two seconds, the Si2457/ 34/15/04 will dial the remaining digits as DTMF. ...
Page 62
... Si2457/34/15/04 U7C GENC Bit D15 D14 D13 D12 D11 D10 Name Type Reset settings = 0x0000 Bit Name 15:5 Reserved Reads returns to zero. 4 RIGPO RI RI follows this bit when RIGPIOEN = 1 3:1 Reserved Reads returns to zero. 0 RIGPOEN indicates valid ring signal. (Normal ring-indicator mode can be used as a general purpose output and follows U7C[4] (RIGPO) ...
Page 63
... D15 D14 D13 D12 D11 D10 Name Type Reset settings = 0x0000 Bit Name 15:2 Reserved Reads returns to zero. 1 V29ENA 0 = Disables V.29 Enables V.29. 0 Reserved Read returns zero. D10 MINT SERM FSMS R/W R/W R/W Function Function Rev. 1.1 Si2457/34/15/ XMTT[7:0] R V29ENA R/W 63 ...
Page 64
... Si2457/34/15/04 7. Parallel Interface Registers Parallel Interface 0 (0x00) Bit Name Type Reset settings = 0x00 Bit Name 7:0 TX/RX[7:0] Parallel Interface Transmit/Receive. This register functions similarly to the serial port TX pin on writes to the parallel port, and sim- ilarly to the serial port RX pin on reads from the parallel port. ...
Page 65
... Use of the CTS and RTS bits (as opposed to the TXE and RXF bits) allows the flow control between the host and the ISOmodem to operate 1 byte at a time, rather than in blocks INTM INT ESC RTS R/W R R/W R/W Function Rev. 1.1 Si2457/34/15/04 D0 CTS R 65 ...
Page 66
... TXD Transmit Data. Data input from DTE TXD pin. 7 CTS Clear to Send. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin. 8 RESET Reset Input. An active low input that is used to reset all control registers to a defined, initialized state. 9 C2A Isolation Capacitor 2A ...
Page 67
... FSYNC/D6 Frame Sync/Data Bit. Frame Sync output to codec in serial mode. Bidirectional parallel bus data bit 6 in parallel mode VD3.3 Digital Supply Voltage. Provides the 3.3 V supply voltage to the Si2457/34/15/04 GND Ground. Connects to the system digital ground. 7,19 VDA, VDB Regulator Voltage Reference. ...
Page 68
... Data input from DTE TXD pin in serial mode. Active low write enable pin in paral- lel mode. 11 CTS/CS Clear to Send/Chip Select. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin in data mode. Active low chip select in parallel mode. 12 RESET Reset Input. ...
Page 69
... Connects to an external capacitor to provide bypassing for an internal power supply. 8 RNG1 Ring 1. Connects through a resistor to the RING lead of the telephone line. Provides the ring and caller ID signals to the Si2457/34/15/04. 9 RNG2 Ring 2. Connects through a resistor to the TIP lead of the telephone line. Provides the ring and caller ID signals to the Si2457/34/15/04 ...
Page 70
... Add an “R” at the end of the device to denote tape and reel option; 2500 quantity per reel. 70 System-Side System-Side* Package 24-pin TSSOP Si2457-C-FT 16-pin SOIC Si2457-C-FS 24-pin TSSOP Si2434-C-FT 16-pin SOIC Si2434-C-FS 24-pin TSSOP Si2415-C-FT 16-pin SOIC Si2415-C-FS 24-pin TSSOP ...
Page 71
... Package Outline: 24-Pin TSSOP Figure 9 illustrates the package details for the Si2457/34/15/04 24-pin packaging option. Table 19 lists the values for the dimensions shown in the illustration. ddd (2x Figure 9. 24-Pin Thin Shrink Small Outline Package (TSSOP) Table 19. Package Diagram Dimensions θ bbb γ ...
Page 72
... Si2457/34/15/04 13. Package Outline: 16-Pin SOIC Figure 10 illustrates the package details for the Si3018/10 and the Si2457/34/15/04 16-pin packaging option. Table 20 lists the values for the dimensions shown in the illustration aaa - Seating Plane Figure 10. 16-pin Small Outline Integrated Circuit (SOIC) Package Table 20. Package Diagram Dimensions ...
Page 73
... Updated default register setting in Table 16. Added Si2404 information. Added 16-pin system-side option. Updated "4. Functional Description" on page 16. Added "8. Pin Descriptions: Si2457/34/15/04 (16-Pin Option)" on page 66. Updated "11. Ordering Guide" on page 70 to reflect part revision. Revision 1.0 to Revision 1.1 Added industrial temperature range devices. ...
Page 74
... Si2457/34/15/ ONTACT NFORMATION Silicon Laboratories Inc. 4635 Boston Lane Austin, TX 78735 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: ISOinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...