EM91450 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25 oC, all voltages referenced to VSS)
Items
Sym.
Rating
Unit
Power supply voltage
Input voltage range
Operating temperature
Storage temperature
Power consumption
VDD
VIN
6.0 Vdc
VSS-0.3V ~ VDD+0.3V
0 ~ 50
V
V
oC
TOPR
TSTO
PD
-55 ~ 125
oC
500
mW
DC ELECTRICAL CHARACTERISTICS
(Ambient temperature is 25 oC, VDD=2.5V unless otherwise noted, all voltages referenced to VSS, Fosc=3.579545 MHz)
Parameter
Sym.
Min. Typ.
Max. Unit
Condition
Operating voltage
Pulse
Tone
Pulse
Tone
2.0
2.0
-
5.5
5.5
0.3
0.5
0.1
0.1
10
V
unload
-
0.15
0.3
-
-
1
Operating current(HKS=0)
Idd
-
-
-
-
-
mA
uA
uA
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
Memory retention current
Standby current
Imrt
HKS=1 Istby
HKS=0
HKS=1
HKS=0
-
10
0.1
30
with pull up/down
resistor * 8
-
HKS, HFI & DRING
pins: input voltage
ViH
0.8VDD
VSS
-
VDD
V
ViL
VH-L
VL-H
IoH
IoL
-
-
-
-
-
0.2VDD
Xmute pin : Schmitt triggers
(input pin)
VSS
0.1VDD
V
at idle state
0.9VDD
0.2
VDD
V
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
Keyboard scanning pins
output current (except COL4/KT)
COL4/KT source current
sink current
-
-
mA
mA
Vo = 2.0 V
Vo = 0.5 V
-0.2
IoH
-
-
0.01
uA
Vo = Vdd
Rhfi
IoH
IoL
IoH
IoL
IoL
Vdc
-
200
10
-
50
800
-
KΩ
uA
Vhfi = Vss
Vksn=Vss
2
200 400
µA
mA
ksn=Vdd
0.2
0.2
-0.2
0.5
-
-
-
-
Vo=2.0V
-
Vo=0.5V
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
pre-emphase
-
mA
Vdtmf = 0.5 V
Vdd = 2.0V ~ 5.5V
0.75
180
3
Vdd
Vdtmf 142 160
mVrms Row group
Twist
THD
ZL
1
-
2
-30
-
dB
dB
Column - Row
ZL = 5 KΩ
distortion
-23
-
load resistance
5
KΩ
THD < − 23dB
2
2
2
2
Distortion(dB)=20 log
{[V1 +V22+V3 ..... +Vn2)1/2]/[(VL +VH )1/2]}
VL, VH =ROW group and column group signal.
V1, V2, V3 .... Vn = Harmonic signal (BW=300Hz~3500Hz)
* This specification are subject to be changed without notice.
2.10.1999
11
ELAN [ ELAN MICROELECTRONICS CORP ]
