EM91450A EMC [ELAN Microelectronics Corp], EM91450A Datasheet - Page 12

• Manufacturer Part Number: EM91450A
• Description: TONE/PULSE DIALER WITH LCD INTERFACE AND I.P.P. DETECT FUNCTION
• Manufacturer: EMC [ELAN Microelectronics Corp]

* This specification are subject to be changed without notice.
AC ELECTRICAL CHARACTERISTIC
DTMF output frequency
(Ambient temperature is 25
Keyboard debounce time
Key tone signal: frequency
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
Keyboard scan pin
ROW1 (f1)
ROW2 (f2)
ROW3 (f3)
ROW4 (f4)
COL1 (f5)
COL2 (f6)
COL3 (f7)
Parameter
duration
o
C, V
CCITT standard (Hz)
(fosc = 3.579545 MHz)
DD
=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)
1209
1336
1477
697
770
852
941
Sym.
Fkt
Tf
Tidp
Thdrdb
Tdly
Tdb
Tkt
Tp
Tpt
PSR
MBR
Tp
Titp
Tbit
Min.
3.8
96
96
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
40:60
33:66
Typ.
600
600
100
300
800
500
300
Actual output (Hz)
3.6
3.6
3.9
20
30
80
20
10
98
98
93
1215.8
1331.6
1471.8
699.1
766.2
847.4
947.9
TONE/PULSE DIALER WITH LCD INTERFACE
Max. Unit
100
100
4.1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ms
Hz
ms
sec.
sec.
ms
pps
%
ms
ms
ms
ms
ms
Row3B, Row4B=NR, NR
PSR = 10 pps
Row3B, Row4B=NR, R-Vss
Row3B,Row4B=R-Vss, NR
Row3B,Row4B=R-Vss,R-Vss
Row1 = R-Vdd
Row1 = R-Vss
Row2 = NR
Row2 = R-Vss
PSR = 20 pps
Memory dialing
AND I.P.P. DETECT FUNCTION
Deviation (%)
Condition
-0.53
-0.32
-0.35
0.30
0.49
0.73
0.56
EM91450 SERIES
2.10.1999
12