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EM91410

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR

ELAN Microelectronics 

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 VSS)

Items

Sym.

Rating

Unit

Power supply voltage

VDD

6.0 Vdc

V

Input voltage range

V

V -0.3V ~ V +0.3V

V

IN

SS

DD

Operating temperature

TOPR

0 ~ +50

°C

Storage temperature

TSTO

-55 ~ 125

°C

Power consumption

PD

500

mW

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

Pulse

Tone

Pulse Idd

Tone

Pulse

Tone

Imrt

2.0 -

5.5 V unload

2.0 -

5.5

- 0.15 0.3

unload

- 0.3 0.5 mA

- 0.15 0.3

with pull up/down

- 0.3 0.5

resistor * 8

- 0.001 0.1 uA HKS=1,Vdd=1V

Standby current

HKS, HFI & DRING

HKS=1 Istby

- 0.001 0.1

unload

HKS=0

-

1

10 uA

HKS=1

-0.001 0.1

with pull up/down

HKS=0

- 10 30

resistor * 8

ViH 0.8Vdd - Vdd V

pins: input voltage

HFO & HDO pins source current

PO, HFO, XMUTE, RMUTE

ViL Vss - 0.2Vdd

IoH

0.2 -

- mA Vo = 2.0 V

IoL

-0.2 -

- mA Vo = 0.5 V

& SDO pins: sink current

PO, XMUTE, RMUTE and SDO

IoH

-

- ±0.001 uA Vo = Vdd

pins: leakage current

HFI pin input resistance

Rhfi

- 200

- KΩ Vhfi = Vss

DRING pin input resistance

Rdring - 100

- KΩ Vdeing=Vss

Keyboard scanning pins

IoH

2 10 50 uA Vksn=Vss

output current (except COL4/KT)

IoL

200 400 800 V ksn=Vdd

COL4/KT source current

IoH

0.2 -

- mA Vo=2.0V

sink current

IoL

0.2 -

-

Vo=0.5V

* This specification are subject to be changed without notice.

10.1.1997 11

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