EM91210 datasheet(9/19 Pages) EMC

Part #	EM91210

Description	TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

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Manufacturer	EMC [ELAN Microelectronics Corp]

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

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EM91210 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

9

* This specification are subject to be changed without notice.

10.1.1997

Keyboard debounce time

Tdb

-

20

-

ms

Key tone signal:

frequency

Fkt

-

600

-

Hz

present duration

Tkt

-

30

-

ms

Pause time and pulse to tone

Tp

-

3.6

-

sec.

COL2=NR

Tpt

-

2

-

sec.

COL2=R-Vss

Flash time

Tf

-

600

-

Row3, Row4=NR, NR

-

100

-

ms

Row3, Row4=NR, R-Vss

-

80

-

Row3, Row4=R-Vss, NR

-

300

-

Row3, Row4=R-Vss,R-Vss

Flash pause time

Tfp

-

300

-

ms

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

96

98

100

Minimum tone duration

T

D

88

90

92

ms

Memory dialing

81

83

85

96

98

100

Minimum inter-tone pause

Titp

88

90

92

ms

Memory dialing

81

83

85

SDO every bit time

Tbit

3.8

3.9

4.1

ms

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)

DTMF output frequency (fosc = 3.579545 MHz)

Keyboard scan pin

CCITT standard (Hz)

Actual output (Hz)

Deviation (%)

ROW1 (f1)

697

699.1

0.30

ROW2 (f2)

770

766.2

0.49

ROW3 (f3)

852

847.4

-0.53

ROW4 (f4)

941

947.9

0.73

COL1 (f5)

1209

1215.8

0.56

COL2 (f6)

1336

1331.6

-0.32

COL3 (f7)

1477

1471.8

-0.35

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