MSM6927RS Oki Semiconductor, MSM6927RS Datasheet

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MSM6927RS

Manufacturer Part Number
MSM6927RS
Description
1200 bps single chip FSK MODEM
Manufacturer
Oki Semiconductor
Datasheet

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MSM6927RS
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ROHM
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MSM6927RS
Manufacturer:
OKI
Quantity:
20 000
E2A0011-16-X1
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MSM6927/6947
1200 bps Single Chip FSK MODEM
GENERAL DESCRIPTION
The MSM6927 and the MSM6947 are OKI's 1200 bps single chip modem series which transmit
and receive serial, binary data over a switched telephone network using frequency shift
keying(FSK).
The MSM6927 is compatible with ITU-T V.23 series data sets, while the MSM6947 is compatible
with Bell 202 series data sets.
These devices provide all the necessary modulation, demodulation, and filtering required to
implement a serial, asynchronous communication link.
OKI's single chip modem series is designed for users who are not telecommunication experts and
are easy to use cost effective alternative to standard discrete modem design.
CMOS LSI technology provides the advantages of small size, low power, and increased
reliability.
The design of the integrated circuit assures compatibility with a broad base of installed low speed
modems and acoustic couplers. Applications include interactive terminals, desk top computers,
point of sale equipment, and credit verification systems.
FEATURES
• Compatible with ITU-T V.23 (MSM6927)
• Compatible with BELL 202 (MSM6947)
• CMOS silicon gate process
• Switched capacitor and advanced CMOS analog technology
• Data rate from 0 to 1200 bps
• Half duplex (2-Wire)
• Receive squelch delay
• Selectable built-in timers and external delay timers possible
• All filtering, modulation, demodulation, and DTE interface on chip
• Crystal controlled oscillator on chip
• TTL compatible digital interface
• Low power dissipation: 90 mW Typ.
• Package options:
28-pin plastic DIP
44-pin plastic QFP
(DIP28-P-600–2.54)
(QFP44-P-910-0.80–K)
(QFP44-P-910-0.80–2K)
(Product name: MSM6927RS)
(Product name: MSM6947RS)
(Product name: MSM6927GS-K)
(Product name: MSM6947GS-K)
(Product name: MSM6927GS-2K)
Previous version: Nov. 1996
This version: Jan. 1998
MSM6927/6947
1/31

Related parts for MSM6927RS

MSM6927RS Summary of contents

Page 1

... Package options: 28-pin plastic DIP (DIP28-P-600–2.54) 44-pin plastic QFP (QFP44-P-910-0.80–K) (QFP44-P-910-0.80–2K) This version: Jan. 1998 MSM6927/6947 Previous version: Nov. 1996 (Product name: MSM6927RS) (Product name: MSM6947RS) (Product name: MSM6927GS-K) (Product name: MSM6947GS-K) (Product name: MSM6927GS-2K) 1/31 ...

Page 2

... Semiconductor BLOCK DIAGRAM SG1 AIN FT AO Transmit Filter X1 OSC X2 CLK TS1(MSM6927RS)/ TS (MSM6947RS) TS2(MSM6927RS)/ ATE(MSM6947RS SG1 SG2 Carrier Detect Receive Filter Demodulator SW Modulator Clock Gen. MSM6927/6947 SG2 V CDR2 REF CDR1 CD1 RD1 RD2 Cont. ROM CD2 DTE ...

Page 3

... Semiconductor PIN CONFIGURATION (TOP VIEW) Note: All pin descriptions except No. 27 pin and No. 28 pin are same for both MSM6927RS and MSM6947RS. TS2 (MSM6927RS ATE (MSM6947RS) TS1 (MSM6927RS (MSM6947RS) CLK ...

Page 4

Semiconductor RS1 RS2 Notes: All pin description except No. 36 pin and No. 28 pin are same for both ...

Page 5

Semiconductor PIN DESCRIPTIONS Power Pin No. Name I — Ground reference — Ground reference — Supply voltage (+12 V nominal ...

Page 6

Semiconductor Control Pin No. Name I/O RS GS-K Digital loop back test. During digital "High", any data sent on the X on the RD pin, and any data sent on the RS1 pin will immediately appear on the CS ...

Page 7

... Semiconductor Both MSM6927RS (or GS-K) and MSM6947RS (or GS-K) have 28 (or 44) pins. The pin descriptions for these 28 (or 44) pins are same except those for No. 27 (or No. 36) pin and No. 28 (or No. 38). The pin descriptions for No. 27 (or No. 36) pin and No. 28 (or No. 38) pin are described as follows. ...

Page 8

Semiconductor Input/Output Pin No. Name I/O RS GS-K Clear to send signal output. The digital "High" level indicates the "OFF" state and digital "Low" indicates the "ON" state. This output goes "Low" at the end ...

Page 9

Semiconductor ABSOLUTE MAXIMUM RATINGS Parameter Symbol Power Supply Voltage Analog Input Voltage *1 Digital Input Voltage *2 Operating Temperature Storage Temperature *1 CDR2 X1, LT, CC, RS1, RS2, XD, CD2, RD2, SQ, FT CD2 ...

Page 10

Semiconductor RECOMMENDED OPERATING CONDITIONS Parameter Symbol Power Supply Voltage Operating Temperature CRYSTAL ...

Page 11

Semiconductor ELECTRICAL CHARACTERISTICS DC and Digital Interface Characteristics Parameter Symbol Power Supply Current Input Leakage Currnet *1 Input Voltage *1 Output Voltage * LT, CC, RS1, RS2, XD, CD2, RD2, SQ, FT CLK, CS, ...

Page 12

Semiconductor Analog Interface Characteristics 1. MSM6927 Transmit carrier out ( Parameter Symbol Mark 1 Carrier Frequency Space 0 Output Resistance Load Resistance Load Capacitance Transmit Level Output Offset Voltage Out-of-Band Energy (Referred to Carrier Level) Receive carrier ...

Page 13

Semiconductor –20 –40 –60 dB Figure 1 MSM6927 Out-of-Band Energy Referred to Carrier Level ( MSM6927/6947 kHz = 0.047 mF) 1 13/31 ...

Page 14

Semiconductor 0 –1 –2 –10 –3 –20 –30 Figure 2 MSM6927 Transmit Filter 0 –10 –20 –30 –40 –50 –60 Figure 3 MSM6927 Receive Filter –20 –30 –40 –50 –60 –70 –80 FREQ (Hz FREQ ...

Page 15

Semiconductor 2. MSM6947 Transmit carrier out ( Parameter Mark 1 Carrier Frequency Space 0 Answer Tone Frequency Output Resistance Load Resistance Load Capacitance Transmit Level Output Offset Voltage Out-of-Band Energy (Referred to Carrier Level) Receive carrier input ...

Page 16

Semiconductor –20 –40 –60 dB Figure 4 MSM6947 Out-of-Band Energy Referred to Carrier Level (C 3 200 –25 –55 MSM6927/6947 kHz = 0.047 mF) 1 16/31 ...

Page 17

Semiconductor 0 –1 –2 –10 –3 –20 –30 Figure 5 MSM6947 Transmit Filter 0 –10 –20 –30 –40 –50 –60 Figure 6 MSM6947 Receive Filter –20 –30 –40 –50 –60 –70 –80 FREQ (Hz FREQ ...

Page 18

Semiconductor Demodulated Bit Characteristics Parameter Symbol Peak Intersymbol Distortion Bit Error Rate Timing Characteristics 1. MSM6927 Parameter Symbol RS/CS Delay Time CD/ON Delay Time CD/OFF Delay Time Soft Turn-OFF Time Receive Data Squelch Delay Time Refer to Fig. 7 ...

Page 19

Semiconductor 2. MSM6947 Parameter Symbol RS/CS Delay Time CD/ON Delay Time CD/OFF Delay Time Soft Turn-OFF Time Receive Data Squelch Delay Time Refer to Fig. 8 Notes: *: Irrespective of I/O condition +: Reserved ( ±10%, ...

Page 20

Semiconductor TIMING DIAGRAM RS1 AIN CD2 Figure 7 MSM6927/6947 Timing Diagram T T RCON RCOFF T "Mark" hold T T CDON MSM6927/6947 CDOFF 20/31 ...

Page 21

... Notes: 1. The crystal should be wired in close physical proximity to the device. 2. High level signals should not be routed next to low level signals. 3. Bypass capacitors and DG should be connected as close to the system ground as possible. Figure 8-1 Application Circuit Using MSM6927RS , SG1, and SG2 should be as close to the device as possible. A MSM6927/6947 ...

Page 22

Semiconductor 2. MSM6947RS Notes: 1. The crystal should be wired in close physical proximity to the device. 2. High level signals should not be routed next to low level signals. 3. Bypass capacitors and DG ...

Page 23

... Semiconductor +6 dBm SG1 C3 –6 dBm 21 AIN AG 19 Figure 9 MSM6927RS/MSM6947RS Application 0.047 2 600 W 1 Note: The signal level on the External Oscillator GATE 3.58 MHz – – ...

Page 24

Semiconductor 4020 * 4020 * 4020 * 4020 (A) RS/CS delay, (B) Receive-squelch delay, (C) CD/ON delay, (D) CD/OFF delay Note: Supply voltage equals V *1: The desired delay ...

Page 25

Semiconductor 4020 * 4020 * 4020 * 4020 (A) RS/CS delay, (B) Receive-squelch delay, (C) CD/ON delay, (D) CD/OFF delay Note: Supply voltage equals V *1: The desired delay ...

Page 26

Semiconductor TS1 TS2 LT RS1 CS RS2 RS/CS Delay CD2 CD ON CD1 CD OFF RD Squelch Delay SQ Squelch Figure 12-1 MSM6927 Equivalent Logic Interface of the Integrated Modem SW Control Modulator De- Delay Modulator ...

Page 27

Semiconductor TS1 TS2 LT RS1 CS RS2 RS/CS Delay CD2 CD ON CD1 Delay CD OFF RD Squelch Delay SQ Squelch Figure 12-2 MSM6947 Equivalent Logic Interface of the Integrated Modem SW Control Modulator De- Modulator ...

Page 28

Semiconductor Carrier SG2 Figure 13 External Resistor Connection for the Setting of Carrier Detect Level COMP Carrier Detect AC/DC Converter V REF MSM6927/6947 CD1 CDR1 R 9 CDR2 R 8 SG2 (R8 + R9) ≥ 28/31 ...

Page 29

Semiconductor PACKAGE DIMENSIONS DIP28-P-600-2.54 MSM6927/6947 (Unit : mm) Package material Epoxy resin Lead frame material 42 alloy Pin treatment Solder plating Solder plate thickness more Package weight (g) 4.30 TYP. 29/31 ...

Page 30

Semiconductor QFP44-P-910-0.80-K Mirror finish Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed ...

Page 31

Semiconductor QFP44-P-910-0.80-2K Mirror finish Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed ...

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