EM91410 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 V
SS
)
Items
Power supply voltage
Input voltage range
Operating temperature
Storage temperature
Power consumption
Sym.
V
DD
V
IN
T
OPR
T
STO
P
D
Rating
6.0 Vdc
V
SS
-0.3V ~ V
DD
+0.3V
0 ~ +50
-55 ~ 125
500
Unit
V
V
°C
°C
mW
ELECTRICAL CHARACTERISTICS
(Ambient temperature is 25
°C,
V
DD
=2.5V unless otherwise noted, all voltages referenced to V
SS
, Fosc=3.579545 MHz)
Parameter
Operating voltage
Operating current(HKS=0)
Pulse
Tone
Pulse
Tone
Pulse
Tone
HKS=1
HKS=0
HKS=1
HKS=0
Sym.
Min.
2.0
2.0
-
-
-
-
-
-
-
Typ.
Max. Unit
Condition
unload
unload
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
with pull up/down
resistor * 8
Idd
Memory retention current
Standby current
Imrt
Istby
HKS, HFI & DRING
pins: input voltage
HFO & HDO pins source current
PO, HFO, XMUTE, RMUTE
& SDO pins: sink current
PO, XMUTE, RMUTE and SDO
pins: leakage current
HFI pin input resistance
DRING pin input resistance
Keyboard scanning pins
output current (except COL4/KT)
COL4/KT source current
sink current
ViH
ViL
IoH
IoL
IoH
Rhfi
Rdring
IoH
IoL
IoH
IoL
-
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
0.2
-
-
mA
-0.2
-
-
mA
-
-
-
2
200
0.2
0.2
-
200
100
10
400
-
-
±0.001
uA
-
-
50
800
-
-
KΩ
KΩ
uA
V
mA
Vo = 2.0 V
Vo = 0.5 V
Vo = Vdd
Vhfi = Vss
Vdeing=Vss
Vksn=Vss
ksn=Vdd
Vo=2.0V
Vo=0.5V
10.1.1997
11
* This specification are subject to be changed without notice.
EMC [ ELAN MICROELECTRONICS CORP ]
