em91401

Manufacturer Part Numberem91401
DescriptionTone/pulse Switchable Dialer With Lcd Interface And Dual-tone Melody Generator
ManufacturerELAN Microelectronics Corp
em91401 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
1

em91401 Summary of contents

  • Page 1

    ... 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 ...

  • 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 ...

  • Page 3

    ... TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR RMUTE HFO HDO SDO XMUTE Row/Column Output circuit programming counter latch Memory & (Melody) decoder Timing/Control circuit Pulse generator Input circuit VDD VDD HFI HKS DRING Function EM91401 SERIES D/A DTMF converter PO 10.1.1997 3 ...

  • Page 4

    ... RMUTE can be restored to “High” level when the first key entry is not the optioned lock-number . * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR Function EM91401 SERIES 10.1.1997 4 ...

  • 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. Mode ROW1 Mode R-Vdd 20 PPS NR Tone R-Vss 10 PPS c. Flash time ...

  • Page 6

    ... Hold function (HDO pin switched to “Low”). • On-off hook once. • To press HD key over 93 ms. * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR (tone mode) EM91401 SERIES 10.1.1997 6 ...

  • Page 7

    ... On-hook, HD line Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level. Music on Hold EM91401 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. * This specification are subject to be changed without notice. ...

  • Page 8

    ... P 0 */”T” LOCK function The EM91401 serial provides the LOCK function to inhibit toll dialing operation. Connecting a resistor on COL1 * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR bit 0 bit2 bit3 ...

  • Page 9

    ... RMUTE stays “High impedance”. If DRING is detected a “High” level, the RMUTE will output “Low” until keyboard entry. In actual application of the RMUTE pin is recommended connection to microphone of the * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR EM91401 SERIES 10.1.1997 9 ...

  • Page 10

    ... 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 - EM91401 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 ...

  • Page 11

    ... Vdd =2.0V ~ 5.5V (-25.3) (dBm) Vstac mVrms Vdd =2.0V ~ 5.5V Thdrdb - 93 - Tbit 3.8 3.9 4.1 Tdly - 300 - EM91401 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 ...

  • Page 12

    ... 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 EM91401 SERIES Deviation (%) 0.30 0.49 -0.53 0.73 0.56 -0.32 -0.35 10.1.1997 12 ...

  • Page 13

    ... 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 EM91401 SERIES AND DUAL-TONE MELODY GENERATOR Tidp Hi-impedance 3 Titp Hi-impedance 10.1.1997 13 ...

  • Page 14

    ... 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 EM91401 SERIES Hi-impedance Titp Hi-impedance 10.1.1997 14 ...

  • Page 15

    ... 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 EM91401 SERIES AND DUAL-TONE MELODY GENERATOR Hi-impedance 4 Hi-impedance Hi-impedance 10.1.1997 15 ...

  • Page 16

    ... 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 EM91401 SERIES Hi-impedance Thdrdb ms Hi-impedance Hi-impedance 10.1.1997 16 ...

  • Page 17

    ... 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 EM91401 SERIES 10.1.1997 17 ...

  • 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 XMUTE 15 8 HKS XOUT 16 7 ROW1 XIN ...

  • Page 19

    ... TEST2 46 TESTI 47 F32H 48 NC VCC R? R? 220K C945 DIODE 47K DIODE DIODE EM91401 SERIES ...

  • Page 20

    ... LCD110 EM91401 SERIES AND DUAL-TONE MELODY GENERATOR SDI 20p .1uF .1uF MS2 .1uF MS1 .1uF VDD VDD ...

  • Page 21

    ... 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 EM91401 SERIES PDIP MILIMETERS INCHES DIM MIN. MAX. MIN. MAX 6.350 - - A1 0.381 - .015 B 0.356 0.558 .014 B1 1.016 1.778 .040 C 0 ...

  • Page 22

    ... 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 EM91401 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 ...

  • Page 23

    ... 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 EM91401 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 ...