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PDF EM91420B Data sheet ( Hoja de datos )
| Número de pieza | EM91420B | |
| Descripción | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR | |
| Fabricantes | ELAN Microelectronics Corp | |
| Logotipo |  |
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EM9E1M4290142S0ESRERIEIESS
TONE/PULTSOENSEW/PUITLSCEHSAWBITLCEHDAIBALLE EDRIAWLEIRTWHILTHCDLCIDNITNETRERFFAACCEE
AND DUAANDL-DTUOANLE-TOMNEELMOEDLYODGYEGNEENRERAATTOORR
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.
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.
• 20-set three touch repertory memory, each one can hold data up to 16 digits.
• 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
KT
EM91420A
√√
EM91420B
√√
EM91420C
√√
EM91420D
√√
Note : PDP = Pocket Dialer Prevented
HOLD(music)
√
√
√
√
LOCK
√
√
√
√
HF SDO(LCD) PDP
√
√√
√√
√
* This specification are subject to be changed without notice.
10.1.1997 1
1 page  
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
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
ROW3 ROW4
NR NR
NR R-Vss
R-Vss
NR
R-Vss R-Vss
e. Lock number
COL2 COL3
NR NR
NR R-Vss
R-Vss
NR
R-Vss R-Vss
Tf (ms)
600
100
80
300
Lock number
none
0
9
0.9
b. M/B ratio
ROW2 MBR (%)
NR 40:60
R-Vss
33:66
d. Lock control method
COL1
Control method
R-Vdd
key lock
NR none lock
R-Vss
password lock
Normal dialing
Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory
automatically. Operating procedure described as follow :
• To select Pulse or Tone mode.
• Off-hook or turn on HF function.
• Keying d1, d2, .. , dn. The “d” expressed digital keypad that included 1~9, *, 0, #, P, and P→T keys. The “n”
expressed unlimited.
• The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.
LNB redial memory
Storing:
In normal dialing mode, every digital key was entry which number will be stored in LNB memory
automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled.
Otherwise, these numbers stored in LNB memory can be redial output.
* This specification are subject to be changed without notice.
10.1.1997 5
5 Page 
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
phone handset to prevent that the dialing signal (DTMF) is coupling by the Microphone of the phone handset.
(such as pocket dialer)
i. In idle state, HKS is from “High” to “Low” (pick up handset action).
ii. In idle state, turn on handfree function.
iii. The flash operation ( F key ).
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25 °C, all voltages referenced to VSS)
Items
Sym.
Rating
Unit
Power supply voltage
Input voltage range
Operating temperature
Storage temperature
Power consumption
VDD 6.0 Vdc
VIN VSS-0.3V ~ VDD+0.3V
T
OPR
0 ~ +50
TSTO -55 ~ 125
PD 500
V
V
°C
°C
mW
ELECTRICAL CHARACTERISTICS
(Ambient
temperature
is
25
°C,
V =2.5V
DD
unless
otherwise
noted,
all
voltages
referenced
to
V,
SS
Fosc=3.579545
MHz)
Parameter
Sym. Min. Typ. Max. Unit Condition
Operating voltage
Operating current(HKS=0)
Memory retention current
Standby current
HKS, HFI & DRING
pins: input voltage
Pulse
Tone
Pulse
Tone
Pulse
Tone
HKS=1
HKS=0
HKS=1
HKS=0
Idd
Imrt
Istby
ViH
ViL
2.0 -
2.0 -
5.5 V
5.5
- 0.15 0.3
- 0.3 0.5 mA
- 0.15 0.3
- 0.3 0.5
- 0.001 0.1 uA
- 0.001 0.1
- 1 10 uA
-0.001 0.1
- 10 30
0.8Vdd - Vdd V
Vss - 0.2Vdd
unload
unload
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
with pull up/down
resistor * 8
HFO & HDO pins source current
PO, HFO, XMUTE, RMUTE
IoH 0.2 -
IoL -0.2 -
- mA Vo = 2.0 V
- mA Vo = 0.5 V
& SDO pins: sink current
PO, XMUTE, RMUTE and SDO
IoH - - ±0.001 uA Vo = Vdd
pins: leakage current
HFI pin input resistance
Rhfi
- 200
- KΩ Vhfi = Vss
DRING pin input resistance
Rdring - 100
- KΩ Vdeing=Vss
Keyboard scanning pins
IoH 2 10 50 uA Vksn=Vss
output current (except COL4/KT)
IoL 200 400 800 V ksn=Vdd
COL4/KT source current
IoH 0.2 -
- mA Vo=2.0V
sink current
IoL 0.2 -
-
Vo=0.5V
* This specification are subject to be changed without notice.
10.1.1997 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet EM91420B.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| EM91420A | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR | ELAN Microelectronics Corp |
| EM91420B | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR | ELAN Microelectronics Corp |
| EM91420C | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR | ELAN Microelectronics Corp |
| EM91420D | TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR | ELAN Microelectronics Corp |
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