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EM91240C Datasheet(PDF) 10 Page - ELAN Microelectronics Corp

Part # EM91240C
Description  TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
PDF  20 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM91240C Datasheet(HTML) 10 Page - ELAN Microelectronics Corp

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EM91240 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
10
* 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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