EM91210 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
ELECTRICAL CHARACTERISTIC
(Ambient temperature is 25°C, V
DD
=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)
Parameter
Keyboard debounce time
Key tone signal:
frequency
present duration
Pause time and pulse to tone
Flash time
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Sym.
Tdb
Fkt
Tkt
Tp
Tpt
Tf
Min.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-0.2
0.5
142
1
-
5
96
88
81
96
88
81
3.8
Typ.
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
Max. Unit
-
ms
Condition
Flash pause time
Pulse rate
Make/Break ratio
Inter-digit pause time
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
pre-emphase
distortion
load resistance
Minimum tone duration
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Tfp
PSR
MBR
Tidp
IoL
Vdc
Vdtmf
Twist
THD
ZL
T
D
Minimum inter-tone pause
SDO every bit time
Titp
Tbit
-
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
10.1.1997
9
* This specification are subject to be changed without notice.
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EMC [ ELAN MICROELECTRONICS CORP ]
