EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
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
duration
Pause time
Pulse to Tone waiting time
Flash time
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Sym.
Tdb
Fkt
Tkt
Tp
Tpt
Tf
Min.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-0.2
0.5
142
1
-
5
96
96
Typ.
20
600
30
3.6
3.6
600
100
80
300
20
10
40:60
33:66
800
500
-
-
160
2
-30
-
98
98
(-23.3)
53
(-25.3)
42
280
3.9
300
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Max. Unit
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-
-
-
-
-
-
-
-
-
ms
Hz
ms
sec.
sec.
ms
Condition
Pulse rate
Make/Break ratio
Inter-digit pause time
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
pre-emphase
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Vmtac
Sub-tone
HD key release hold function
debounce time
SDO every bit time
Off-Hook delay time
Vstac
Thdrdb
Tbit
Tdly
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48
37
-
3.8
-
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58
47
-
4.1
-
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ms
ms
* This specification are subject to be changed without notice.
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distortion
load resistance
Minimum tone duration
Minimum inter-tone pause
Melody output signal:
main tone ac level
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PSR
MBR
Tidp
IoL
Vdc
Vdtmf
Twist
THD
ZL
Tp
Titp
pps
Row3B, Row4B=NR, NR
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
-
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
-
100
100
dB
KΩ
ms
RL = 5 KΩ
THD
< −
23dB
Memory dialing
(dBm)
mVms Vdd =2.0V ~ 5.5V
(dBm)
mVms Vdd =2.0V ~ 5.5V
ms
10.1.1997
12
EMC [ ELAN MICROELECTRONICS CORP ]
