EM91401B

Manufacturer Part NumberEM91401B
DescriptionTONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
ManufacturerEMC [ELAN Microelectronics Corp]
EM91401B datasheet
 


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GENERAL DESCRIPTION
The EM91401 is a series of tone/pulse switchable dialers that is composed of T/P dialer. The EM91401 series
provide necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone
(DTMF) dialing, Handfree dialing, keying tone ,and lock functions. The lock function is designed to inhibit toll
dialing operation. Beside this, melody generator, ring detector and SDO (Serial Data Output) functions are
provided in advance version. Melody generator will output dual-tone music in line hold duration. Ring detector
can prevent illegal dialing from pocket dialer. The SDO is designed to drive LCD driver and voice synthesizer.
In this application, the dialing numbers can be displayed on LCD screen with EM32100 ( or EM32116 ).
FEATURES
• Tone/Pulse switchable.
Wide operating voltage from 2.0 V to 5.5 V.
Low operating current, 0.15 mA (Pulse) and 0.3 mA (Tone) typically.
• Adding resistor on keyboard scan pin that can select many telephone specifications, such as : Pulse rate,
M/B ratio, Flash time, lock dialing functions.
• SDO function supports LCD driver and voice synthesizer to indicate dialing numbers.
• Line hold function is designed for stopping conversation temporality.
• Melody generator provides music on hold function.
• Lock function provides conventionality key lock and password lock operations.
• Ring detector is designed to prevent illegal dialing from pocket dialer.
• A 32-digit LNB (last number) redial memory.
• Keytone function provides rapidly keying recognition.
• Handfree function provides on-hook dialing and speakerphone application.
• Pause and P-T time are fixed to 3.6 seconds.
• Tone duration and inter-tone pause time are fixed to 98 ms.
• Using 3.579545 MHz crystal or ceramic resonator.
• Package forms: PDIP, skinny.
ORDERING INFORMATION
Versions list and function outline
VERSION
LNB
EM91401A
EM91401B
EM91401C
EM91401D
Note : PDP = Pocket Dialer Prevented
* This specification are subject to be changed without notice.
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
AND DUAL-TONE MELODY GENERATOR
KT
HOLD(music)
LOCK
EM91401 SERIES
EM91401 SERIES
HF
SDO(LCD)
PDP
10.1.1997
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EM91401B Summary of contents

  • Page 1

    ... Package forms: PDIP, skinny. ORDERING INFORMATION Versions list and function outline VERSION LNB EM91401A EM91401B EM91401C EM91401D Note : PDP = Pocket Dialer Prevented * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE ...

  • Page 2

    ... XOUT 14 HKS XMUTE 13 VDD VSS 12 DTMF HFI 11 HFO DRING COL1 COL2 COL3 COL4/ */ RD/P EM91401 SERIES EM91401BP ROW4 3 16 ROW3 4 15 ROW2 5 14 ROW1 6 13 HKS 7 12 VDD 8 11 DTMF 9 10 HFO 1 22 HDO 2 ...

  • Page 3

    FUNCTIONAL BLOCK DIAGRAM COL1 Keyboard COL2 COL3 interface COL4/KT (column) COL5 XIN Oscillator XOUT ROW1 Keyboard ROW2 interface ROW3 (Row) ROW4 PIN DESCRIPTIONS Symbol ROW1~ROW4 Keyboard scan pins of row group. In idle state (HKS is “High” and HFO is ...

  • Page 4

    Symbol HKS Control signal inputs pin that is corresponding hook switch status. When handset was left from cradle, this pin must be connected to “Low” level to operate all functions. Otherwise, this pin must be connected to “High” level to ...

  • Page 5

    FUNCTION DESCRIPTIONS Dialing signal selection The EM91401 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. ...

  • Page 6

    Redialing: After normal dialing, directly keying F key (or On-Off hook once) and keying RD key on keyboard. The numbers that are stored into LNB memory will be dialed output. Pause (P) key operation The Pause (P) key is designed ...

  • Page 7

    Turn on Handfree (HF) function. (HFO pin switched to “High”) Special Note: A 300 ms delay time (Tdly) at the first Off-Hook or turn on Handfree that is a special designed to avoid a rapid key entry (dummy number ...

  • Page 8

    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. So the dialing numbers can be display on LCD screen with ...

  • Page 9

    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 ...

  • Page 10

    Microphone of the phone handset. (such as pocket dialer idle state, HKS is from “High” to “Low” (pick up handset action). ii. In idle state, ...

  • Page 11

    ELECTRICAL CHARACTERISTIC (Ambient temperature =2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz) DD Parameter Keyboard debounce time Key tone signal: frequency duration Pause time Pulse to Tone waiting time Flash time Pulse rate Make/Break ...

  • Page 12

    DTMF output frequency (fosc = 3.579545 MHz) Keyboard scan pin CCITT standard (Hz) ROW1 (f1) ROW2 (f2) ROW3 (f3) ROW4 (f4) COL1 (f5) COL2 (f6) COL3 (f7) * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER ...

  • Page 13

    TIMING DIAGRAM HKS 2 KEY IN Tdb KT XMUTE HDO SDO PO DTMF OSC. Tdly HKS KEY IN KT XMUTE HDO SDO PO DTMF OSC. * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD ...

  • Page 14

    LNB=2,3 HKS RD/P KEY IN Tdb KT XMUTE HDO SDO PO DTMF OSC. Tdly LNB=2,3 HKS RD/P KEY IN Tdb KT XMUTE HDO SDO PO DTMF OSC. Tdly * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE ...

  • Page 15

    HKS 2 KEY IN KT XMUTE HDO SDO PO Tidp DTMF OSC. HKS 2 KEY IN KT XMUTE HDO SDO PO DTMF OSC. Figure 6. Pulse to Tone (P T) operating timing HKS KEY IN Tdb KT XMUTE HDO SDO ...

  • Page 16

    HKS KEY IN KT SDO <Note>L=LSB,M=MSB, sT=START bit time, spT=STOP bit time HKS HF KEY IN HFO HDO XMUTE SDO PO MELODY @ : It can be triggled by extension telephone set for hold function release HFI HF or HKS ...

  • Page 17

    RING Ton DRING HKS RMUTE * 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 ...

  • Page 18

    APPLICATION CIRCUIT EM91401 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 12 11 HFO HFI 13 10 DTMF ...

  • Page 19

    EM32100 Application Circuit : SW 100K SW HOOK R? VDD 200K SDO SDI HKS 220K DIALER Q? 3 HDO 2 1 C945 HFO VSS 100K Package type : QFP 48 pins or chip form provided * ...

  • Page 20

    EM32116 Application Circuit : SDI Hook Switch detection circuit 1 2 LINE HOOK 100K .1U Package type : QFP 64 pins or chip form provided * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE ...

  • Page 21

    PACKAGE INFORMATION Example : EM 91401 P (1) (2) (3) (1) ELAN MICRO. pefix (2) Type number (3) Package code: 18/20/28 Lead Plastic Package PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX 5.334 - .210 ...

  • Page 22

    Lead Plastic Package-Skinny PDIP (skinny) MILIMETERS DIM MIN. MAX 4.752 A1 0.381 - B 0.356 0.558 B1 1.27 1.778 C 0.204 3.556 D 25.90 26.67 E 7.620 8.255 E1 6.223 6.604 e 2.286 ...

  • Page 23

    SDIP Package DIM * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE SDIP MILIMETERS MIN. MAX. MIN 5. 0.381 ...