EM91401BP datasheet(11/23 Pages) EMC

Part #	EM91401BP

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

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Manufacturer	EMC [ELAN Microelectronics Corp]

Direct Link	http://www.emc.com.tw

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EM91401 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

AND DUAL-TONE MELODY GENERATOR

11

* This specification are subject to be changed without notice.

Preliminary

10.1.1997

Parameter

Sym.

Min.

Typ.

Max. Unit

Condition

ELECTRICAL CHARACTERISTIC

(Ambient temperature is 25

°C, V

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

Keyboard debounce time

Tdb

-

20

-

ms

Key tone signal:

frequency

Fkt

-

600

-

Hz

duration

Tkt

-

30

-

ms

Pause time

Tp

-

3.6

-

sec.

Pulse to Tone waiting time

Tpt

-

3.6

-

sec.

Flash time

Tf

-

600

-

Row3B, Row4B=NR, NR

-

100

-

ms

Row3B, Row4B=NR, R-Vss

-

80

-

Row3B,Row4B=R-Vss, NR

-

300

-

Row3B,Row4B=R-Vss,R-Vss

Pulse rate

PSR

-

20

-

pps

Row1 = R-Vdd

-

10

-

Row1 = R-Vss

Make/Break ratio

MBR

-

40:60

-

%

Row2 = NR

-

33:66

-

Row2 = R-Vss

Inter-digit pause time

Tidp

-

800

-

ms

PSR = 10 pps

-

500

-

PSR = 20 pps

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

mVrms Row group

pre-emphase

Twist

1

2

3

dB

Column - Row

distortion

THD

-

-30

-23

dB

RL = 5 K

Ω

load resistance

ZL

5

-

K

Ω

THD

< − 23dB

Minimum tone duration

Tp

96

98

100

Minimum inter-tone pause

Titp

96

98

100

ms

Memory dialing

Melody output signal:

main tone ac level

(-23.3)

(dBm)

Vmtac

48

53

58

mVrms Vdd =2.0V ~ 5.5V

Sub-tone

(-25.3)

(dBm)

Vstac

37

42

47

mVrms Vdd =2.0V ~ 5.5V

HD key release hold function

Thdrdb

-

93

-

ms

debounce time

SDO every bit time

Tbit

3.8

3.9

4.1

ms

Off-Hook delay time

Tdly

-

300

-

ms

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