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EM91465

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION

ELAN Microelectronics 

EM91465 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

AND I.P.P. DETECT FUNCTION

AC ELECTRICAL CHARACTERISTIC

(Ambient

temperature

is

25°C,

V =2.5V

DD

unless

otherwise

noted,

all

voltages

referenced

to

Vss,Fosc=3.579545

MHz)

Parameter

Sym. Min. Typ. Max. Unit

Condition

Keyboard debounce time

Key tone signal: frequency

duration

Pause time

Pulse to Tone waiting time

Flash time

Pulse rate

Make/Break ratio

Inter-digit pause time

Minimum tone duration

Minimum inter-tone pause

HD key release hold function

debounce time

SDO bit time

Off-Hook delay time

Tdb

-

Fkt

-

Tkt

-

Tp

-

Tpt

-

Tf

-

-

-

-

PSR

-

-

MBR -

-

Tidp

-

-

Tp

96

Titp 96

Thdrdb -

20

- ms

600

- Hz

30

- ms

3.6

- sec.

3.6

- sec.

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

20

- pps Row1 = R-Vdd

10

-

Row1 = R-Vss

40:60 - % Row2 = NR

33:66 -

Row2 = R-Vss

800

- ms PSR = 10 pps

500

-

PSR = 20 pps

98 100

98 100 ms Memory dialing

93

- ms

Tbit 3.8 3.9 4.1 ms

Tdly

-

300

- ms

DTMF output frequency (fosc = 3.579545 MHz)

Keyboard scan pin

ROW1 (f1)

ROW2 (f2)

ROW3 (f3)

ROW4 (f4)

COL1 (f5)

COL2 (f6)

COL3 (f7)

CCITT standard (Hz)

697

770

852

941

1209

1336

1477

Actual output (Hz)

699.1

766.2

847.4

947.9

1215.8

1331.6

1471.8

Deviation (%)

0.30

0.49

-0.53

0.73

0.56

-0.32

-0.35

* This specification are subject to be changed without notice.

9.24.1998 12

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