EM91455 查看數據表（PDF） - ELAN Microelectronics
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EM91455 Datasheet PDF : 24 Pages
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EM91455 SERIES
TONE/PULSE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25 °C, all voltages referenced to VSS)
Items
Sym.
Rating
Unit
Power supply voltage
V
6.0 Vdc
V
DD
Input voltage range
VIN
VSS-0.3V ~ VDD+0.3V
V
Operating temperature
TOPR
0 ~ 50
°C
Storage temperature
TSTO
-55 ~ 125
°C
Power consumption
PD
500
mW
DC 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
Xmute pin : Schmitt triggers
(input pin)
HFO & HDO pins source current
Pulse
Tone
Pulse
Tone
HKS=1
HKS=0
HKS=1
HKS=0
Idd
Imrt
Istby
ViH
ViL
VH-L
V
L-H
IoH
2.0 -
2.0 -
- 0.15
- 0.3
--
--
-1
-
- 10
0.8VDD -
VSS
-
VSS
-
0.7V -
DD
0.2 -
5.5 V
5.5
0.3 mA
0.5
0.1 uA
0.1
10 uA
0.1
30
VDD V
0.2VDD
0.3VDD V
VV
DD
- mA
unload
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
with pull up/down
resistor * 8
at idle state
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
- - 0.01 uA
Vo = Vdd
pins: leakage current
HFI pin input resistance
Rhfi
- 200
- KΩ
Vhfi = Vss
Keyboard scanning pins
IoH
2 10
50 uA
Vksn=Vss
output current (except COL4/KT)
IoL 200 400 800 µA
ksn=Vdd
COL4/KT source current
IoH 0.2 -
- mA Vo=2.0V
sink current
IoL 0.2 -
-
Vo=0.5V
DTMF pin: sink current
IoL -0.2 -
- mA Vdtmf = 0.5 V
DTMF signal DC level
Vdc 0.5 -
0.75 Vdd Vdd = 2.0V ~ 5.5V
DTMF signal: ac level
Vdtmf 142 160
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pre-emphase
Twist 1 2
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distortion
THD - -30
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load resistance
ZL
5-
Distortion(dB)=20 log
{[V12+V22+V32 ..... +Vn2)1/2]/[(VL2+VH2)1/2]}
VL, VH =ROW group and column group signal.
V1, V2, V3 .... Vn = Harmonic signal (BW=300Hz~3500Hz)
180
3
-23
-
mVrms
dB
dB
KΩ
Row group
Column - Row
ZL = 5 KΩ
THD < − 23dB
* This specification are subject to be changed without notice.
9.24.1998 11
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