EM91420CK ELAN Microelectronics Corp, EM91420CK Datasheet
EM91420CK
Available stocks
Related parts for EM91420CK
EM91420CK Summary of contents
Page 1
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 ...
Page 2
... EM91420 Pin Assignment EM91420AP COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS EM91420CK NC 1 COL5 2 COL4/KT 3 COL3 4 COL2 5 COL1 6 XIN 7 XOUT 8 XMUTE 9 VSS 10 HFI 11 Keyboard Arrangement ROW1 ROW2 ROW3 ROW4 * This specification are subject to be changed without notice. TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE ...
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 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. ...
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. Repertory memory The EM91420 series incorporated several sets repertory memory ...
Page 7
Flash (F) key operation The Flash (F) key is designed to break telephone line temporarily. After F key is depressed, this dialer will send a flash signal to break line 600 ms, 300 ms, 100 ...
Page 8
Operating flow chart On-hook Hand-free State On-hook Hold-line State <Note> Handfree HD = Hold Truth table Operating state (0) On-hook, idle state (1) Off-hook line (2) Off-hook, HF line (3) On-hook, HF line (4) ...
Page 9
SDO Keypad Encoded table: Digital key (b5,b4=0,0) keypad output b3,b2,b1,b0 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 Display Function key (b5,b4=1,0) keypad ST Hold output b3,b2,b1,b0 0000 ...
Page 10
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 ...
Page 11
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 12
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 13
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 14
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 15
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 16
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 17
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 18
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 19
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 ...
Page 20
EM32100 Application Circuit : SEG16 25 SEG15 26 SEG14 27 SEG13 28 SEG12 29 SEG11 30 SEG10 SEG9 33 SEG8 34 SEG7 35 SEG6 36 Package type : QFP 48 pins or chip form provided * This ...
Page 21
EM32116 Application Circuit : Package type : QFP 64 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 TEST1 SEG10 F32HZ SEG11 MS1 SEG12 ...
Page 22
PACKAGE INFORMATION Example : EM 914XX 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 23
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 24
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 ...