EM91203 Ver la hoja de datos (PDF) - ELAN Microelectronics
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EM91203 Datasheet PDF : 19 Pages
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EM91203 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
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
Tdb
-
Key tone signal:
frequency
Fkt
-
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present duration
Tkt
-
Pause time and pulse to tone
Tp
-
Tpt
-
Flash time
Tf
-
-
-
-
Flash pause time
Tfp
-
Pulse rate
PSR
-
-
Make/Break ratio
MBR -
Inter-digit pause time
-
Tidp
-
-
DTMF pin: sink current
IoL -0.2
DTMF signal DC level
Vdc 0.5
DTMF signal: ac level
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pre-emphase
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distortion
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load resistance
Minimum tone duration
Vdtmf
Twist
THD
ZL
TD
142
1
-
5
96
88
81
96
Minimum inter-tone pause
SDO every bit time
Titp 88
81
Tbit 3.8
20
600
30
3.6
2
600
100
80
300
300
20
10
40:60
33:66
800
500
-
-
160
2
-30
-
98
90
83
98
90
83
3.9
- ms
- Hz
- ms
- sec. COL2=NR
- sec. COL2=R-Vss
-
Row3, Row4=NR, NR
- ms Row3, Row4=NR, R-Vss
-
Row3, Row4=R-Vss, NR
-
Row3, Row4=R-Vss,R-Vss
- ms
- pps Row1 = R-Vdd
-
Row1 = R-Vss
- % Row2 = NR
-
Row2 = R-Vss
- ms PSR = 10 pps
-
PSR = 20 pps
- mA Vdtmf = 0.5 V
0.75 Vdd Vdd = 2.0V ~ 5.5V
180 mVrms Row group
3 dB Column - Row
-23 dB RL = 5 KΩ
- KΩ THD <−23dB
100
92 ms Memory dialing
85
100
92 ms Memory dialing
85
4.1 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.
10.1.1997 9
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