EM91440 데이터 시트보기 (PDF) - ELAN Microelectronics
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EM91440 Datasheet PDF : 24 Pages
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EM91440 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
keyboard entry. In actual application of the RMUTE pin is recommended connection to microphone of the
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
VDD
6.0 Vdc
V
Input voltage range
VIN
VSS-0.3V ~ VDD+0.3V
V
Operating temperature
TOPR
0 ~ +50
°C
Storage temperature
T
STO
-55 ~ 125
°C
Power consumption
PD
500
mW
ELECTRICAL CHARACTERISTICS
(Ambient temperature is 25 °C, VDD=2.5V unless otherwise noted, all voltages referenced to VSS, 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
HFO & HDO pins source current
Pulse
Tone
Pulse
Tone
Pulse
Tone
HKS=1
HKS=0
HKS=1
HKS=0
Idd
Imrt
Istby
ViH
ViL
IoH
2.0 -
5.5 V
2.0 -
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
0.2 -
- mA
unload
unload
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
with pull up/down
resistor * 8
Vo = 2.0 V
PO, HFO, XMUTE, RMUTE
IoL
-0.2 -
- 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
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