EM91450 Ver la hoja de datos (PDF) - ELAN Microelectronics
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EM91450 Datasheet PDF : 24 Pages
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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
VDD
6.0 Vdc
V
Input voltage range
VIN
VSS-0.3V ~ VDD+0.3V
V
Operating temperature
TOPR
0 ~ 50
oC
Storage temperature
TSTO
-55 ~ 125
oC
Power consumption
PD
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
Operating current(HKS=0)
Memory retention current
Standby current
Pulse
Tone
Pulse
Tone
HKS=1
HKS=0
HKS=1
HKS=0
Idd
Imrt
Istby
2.0 -
2.0 -
- 0.15
- 0.3
--
--
-1
-
- 10
5.5 V
5.5
0.3 mA
0.5
0.1 uA
0.1
10 uA
0.1
30
unload
with pull up/down
resistor * 8
HKS=1,Vdd=1V
unload
with pull up/down
resistor * 8
HKS, HFI & DRING
pins: input voltage
Xmute pin : Schmitt triggers
(input pin)
HFO & HDO pins source current
ViH
ViL
VH-L
VL-H
IoH
0.8VDD -
VSS
-
VSS
-
0.9VDD -
0.2 -
VDD V
0.2VDD
0.1VDD V
VDD V
- mA
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 142 160 180
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pre-emphase
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Twist 1 2
3
distortion
THD - -30 -23
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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)
* This specification are subject to be changed without notice.
mVrms
dB
dB
KΩ
Row group
Column - Row
ZL = 5 KΩ
THD < − 23dB
2.10.1999 11
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