em91420 ELAN Microelectronics Corp, em91420 Datasheet
em91420
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em91420 Summary of contents
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... GENERAL DESCRIPTION The EM91420 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 20-set memories. The EM91420 series provides necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone (DTMF) dialing, Handfree dialing, keying tone ,and lock functions. ...
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... HKS XMUTE 14 VDD 13 DTMF 12 HFO COL1 COL2 COL3 COL4/ */ RD/P EM91420 SERIES AND DUAL-TONE MELODY GENERATOR EM91420BP 1 20 COL5 HDO COL3 ROW4 4 17 COL2 ROW3 5 16 COL1 ROW2 6 15 XIN ROW1 7 14 XOUT ...
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... TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR RMUTE SDO HFO HDO XMUTE Row/Column Output circuit programming counter latch Memory & (Melody) decoder Timing/Control circuit Pulse generator Input circuit VDD VDD HFI HKS DRING Function EM91420 SERIES D/A DTMF converter PO 10.1.1997 3 ...
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... RMUTE can be restored to “High” level when the first key entry is not the optioned lock-number . NC No connection. * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Function EM91420 SERIES 10.1.1997 4 ...
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... FUNCTION DESCRIPTIONS Dialing signal selection The EM91420 series incorporated a special keyboard scanning function that is connecting a resistor (typically is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described as following : a. Mode ROW1 Mode R-Vdd 20 PPS NR Tone R-Vss 10 PPS c. Flash time ...
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... LNB memory will be dialed output. Repertory memory The EM91420 series incorporated several sets repertory memory and each one can store number digits. These memories were designed to 20 sets types memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into specific memory ...
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... The dummy number “3” is not detected by the centered office or PABX ,but the following numbers “0” ,1,2,3... long distance call can be dialed out normally since the leading number “3” is not the Lock-number defined in EM91420 series. To prevent the unavoidable long distance call, then EM91420 inhibits the key entry during Tdly. ...
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... On-hook, HD line Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level. Music on Hold EM91420 series built-in a melody generator to generate dual-tone music on DTMF output pin. The music is designed for telephone line at line holding. SDO (Serial Data Output) function The SDO is serial data output which format is same as UART protocol. SDO function is designed to drive LCD driver and voice synthesizer ...
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... EM91420 SERIES 0 “*”/ */”T” (Lock state) 0001 Lock bit1 bit0 Display ...
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... LOCK function The EM91420 serial provides the LOCK function to inhibit toll dialing operation. Connecting a resistor on COL1 pin to VSS can select different LOCK control method that is conventional key lock or password lock. Also the lock number that can be selected by connecting the resistors on COL2 or COL3 pin. After power on reset, the password is fixed to 000 automatically ...
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... ViH 0.8Vdd - ViL Vss - IoH 0.2 - IoL -0.2 - IoH - - Rhfi - 200 Rdring - 100 IoH 2 10 IoL 200 400 IoH 0.2 - IoL 0.2 - EM91420 SERIES ) SS Unit V +0. Fosc=3.579545 MHz) SS Max. Unit Condition 5.5 V unload 5.5 0.3 unload 0.5 mA 0.3 with pull up/down 0.5 resistor * 8 0.1 uA HKS=1,Vdd=1V 0.1 unload 10 uA ...
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... Vmtac (-25.3) Vstac Thdrdb - 280 - Tbit 3.8 3.9 4.1 Tdly - 300 - EM91420 SERIES Condition sec. sec. Row3B, Row4B=NR Row3B, Row4B=NR, R-Vss Row3B,Row4B=R-Vss, NR Row3B,Row4B=R-Vss,R-Vss pps Row1 = R-Vdd Row1 = R-Vss % Row2 = NR Row2 = R-Vss ms PSR = 10 pps PSR = 20 pps mA Vdtmf = 0.5 V Vdd Vdd = 2 ...
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... COL1 (f5) COL2 (f6) COL3 (f7) * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Actual output (Hz) 697 699.1 770 766.2 852 847.4 941 947.9 1209 1215.8 1336 1331.6 1477 1471.8 EM91420 SERIES Deviation (%) 0.30 0.49 -0.53 0.73 0.56 -0.32 -0.35 10.1.1997 13 ...
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... This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE 3 Tkt Tm T Tidp Figure 1. Pulse mode operating timing 2 Tdb Td Titp Figure 2. DTMF mode operating timing EM91420 SERIES AND DUAL-TONE MELODY GENERATOR Tidp Hi-impedance 3 Titp Hi-impedance 10.1.1997 14 ...
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... This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Tkt Tm Tidp Tidp Figure 3. Pulse mode LNB redial timing Tkt Td Td Titp Figure 4. DTMF mode LNB redial timing EM91420 SERIES Hi-impedance Titp Hi-impedance 10.1.1997 15 ...
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... DTMF OSC. * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE RD Tidp Figure 5. Pause key operating timing */T 3 Tpt F Tfp=300ms Tf Figure 7. Flash key operating timing EM91420 SERIES AND DUAL-TONE MELODY GENERATOR Hi-impedance 4 Hi-impedance Hi-impedance 10.1.1997 16 ...
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... Tbit Figure 8. SDO operating timing Figure 9. HF and HD operating timing 5 0 "0" digit dialing time Figure 10. Off-Hook delay time EM91420 SERIES Hi-impedance 280 Thdrdb ms Hi-impedance Hi-impedance 10.1.1997 17 ...
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... The external ring detection circuit must send a low signal at the total ring cycle (Ton and Toff) RING DRING HKS RMUTE * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Toff Figure 11. Timing of receiving an incoming call Figure 12. Timing of making an outgoing call EM91420 SERIES 10.1.1997 18 ...
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... APPLICATION CIRCUIT EM91420 series Application circuit * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR RMUTE DRING 13 12 HFO HFI 14 11 DTMF VSS 15 10 VDD XMUTE 16 9 HKS XOUT 17 8 ROW1 XIN ...
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... Package type : QFP 48 pins or chip form provided * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR NC 12 ENRTC 11 24/ XOUT XIN HKS 4 SD1 3 MS2 2 MS1 1 EM91420 SERIES 10.1.1997 20 ...
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... SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 GENERATOR MELODY DUAL-TONE INTERFACE LCD WITH DIALER SERIES EM91420 notice. without provided form SEG25 SEG24 XOUT SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 V SEG15 HKS SEG14 SEG13 ...
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... E 7.620 8.255 .300 .325 E1 6.096 7.112 .240 .280 e 2.286 2.794 .090 .110 eB - 10.92 - .430 L 2.921 4.064 .115 .160 EM91420 SERIES AND DUAL-TONE MELODY GENERATOR PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX 6.350 - - A1 0.381 - .015 B 0.356 0.558 .014 B1 1 ...
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... C 0.204 1.02 1.05 D 31.24 .300 .325 E 7.620 .245 .260 E1 6.223 .090 .110 e 2.286 .330 .400 eB 8.636 .115 .160 L 2.921 EM91420 SERIES PDIP (skinny) INCHES MAX. MIN. MAX. 4.572 - .180 - .015 - 0.558 .014 .022 1.778 .050 .070 0.381 .008 .015 32.26 1.23 1 ...
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... B1 0.914 1.116 0.036 C 0.204 0.304 0.008 D 36.70 37.34 1.445 E1 13.84 14.10 0.545 e 1.727 1.829 0.068 eB 15.24 17.78 0.600 D1 0 0.127 0 L 2.921 3.429 0.115 EM91420 SERIES AND DUAL-TONE MELODY GENERATOR E1 A1 INCHES MAX. 0.200 - 0.165 0.022 0.044 0.012 1.470 0.555 0.072 0.70 0.005 0.135 10.1.1997 ...