EM91240C datasheet(9/20 Pages) EMC

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EM91240 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

* This specification are subject to be changed without notice.

10.1.1997

ELECTRICAL CHARACTERISTICS

(Ambient temperature is 25

°C, V

DD=2.5V unless otherwise noted, all voltages referenced to VSS, Fosc=3.579545 MHz)

Parameter

Sym.

Min.

Typ.

Max.

Unit

Condition

Operating voltage

Pulse

2.0

5.5

unload

Tone

2.0

5.5

Operating current(HKS=0)

Pulse

Idd

0.15

0.3

unload

Tone

0.3

0.5

Pulse

0.15

0.3

with pull up/down

Tone

0.3

0.5

resistor * 8

Memory retention current

Imrt

0.001

0.1

HKS=1,Vdd=1V

Standby current

HKS=1

Istby

0.001

0.1

unload

HKS=0

HKS=1

-0.001

0.1

with pull up/down

HKS=0

resistor * 8

HKS, HFI

ViH

0.8Vdd

Vdd

pins: input voltage

ViL

Vss

0.2Vdd

HFO & PM pins source current

IoH

0.2

Vo = 2.0 V

PO, HFO, XMUTE,

IoL

-0.2

Vo = 0.5 V

& PM, SDO pins: sink current

PO, XMUTE and SDO

IoH

±0.001 uA

Vo = Vdd

pins: leakage current

HFI pin input resistance

Rhfi

200

Ω Vhfi = Vss

Keyboard scanning pins

IoH

Vksn=Vss

output current (except COL4/KT)

IoL

200

400

800

Vksn=Vdd

COL4/KT source current

IoH

0.2

Vo=2.0V

sink current

IoL

0.2

Vo=0.5V

ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25

°C, all voltages referenced to V

SS)

Items

Sym.

Rating

Unit

Power supply voltage

6.0 Vdc

Input voltage range

-0.3V ~ V

+0.3V

Operating temperature

OPR

0~ +50

°C

Storage temperature

STO

-55 ~ 125

°C

Power consumption

500

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