EM91465 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND I.P.P. DETECT FUNCTION
AC ELECTRICAL CHARACTERISTIC
(Ambient temperature is 25°C, VDD=2.5V 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
Tdb
Fkt
Tkt
Tp
-
-
20
600
30
-
ms
-
Hz
-
-
ms
Pause time
-
3.6
3.6
600
100
80
-
sec.
sec.
Pulse to Tone waiting time
Flash time
Tpt
Tf
-
-
-
-
Row3B, Row4B=NR, NR
Row3B, Row4B=NR, R-Vss
Row3B,Row4B=R-Vss, NR
Row3B,Row4B=R-Vss,R-Vss
Row1 = R-Vdd
-
-
ms
-
-
-
300
20
-
Pulse rate
PSR
-
-
pps
%
-
10
-
Row1 = R-Vss
Make/Break ratio
Inter-digit pause time
MBR
Tidp
-
40:60
33:66
800
500
98
-
Row2 = NR
-
-
-
Row2 = R-Vss
-
ms
PSR = 10 pps
-
-
PSR = 20 pps
Minimum tone duration
Minimum inter-tone pause
HD key release hold function
debounce time
Tp
Titp
Thdrdb
96
96
-
100
100
-
98
93
ms
ms
Memory dialing
SDO bit time
Off-Hook delay time
Tbit
Tdly
3.8
-
3.9
300
4.1
-
ms
ms
DTMF output frequency (fosc = 3.579545 MHz)
Keyboard scan pin CCITT standard (Hz)
Actual output (Hz)
699.1
Deviation (%)
0.30
ROW1 (f1)
ROW2 (f2)
ROW3 (f3)
ROW4 (f4)
COL1 (f5)
COL2 (f6)
COL3 (f7)
697
770
852
766.2
847.4
947.9
1215.8
1331.6
1471.8
0.49
-0.53
0.73
0.56
-0.32
-0.35
941
1209
1336
1477
* This specification are subject to be changed without notice.
9.24.1998
12
ELAN [ ELAN MICROELECTRONICS CORP ]
