EM91440 查看數據表（PDF） - ELAN Microelectronics
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EM91440 Datasheet PDF : 24 Pages
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EM91440 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
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
Key tone signal:
frequency
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duration
Pause time
Pulse to Tone waiting time
Flash time
Pulse rate
Make/Break ratio
Inter-digit pause time
DTMF pin: sink current
DTMF signal DC level
DTMF signal: ac level
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pre-emphase
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distortion
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load resistance
Minimum tone duration
Minimum inter-tone pause
Melody output signal:
main tone ac level
Sub-tone
HD key release hold function
debounce time
SDO every bit time
Off-Hook delay time
Tdb
-
20
- ms
Fkt
-
Tkt
-
Tp
-
Tpt
-
Tf
-
-
-
-
PSR
-
-
MBR -
-
Tidp
-
-
IoL -0.2
Vdc 0.5
Vdtmf 142
Twist 1
THD -
ZL
5
Tp
96
Titp 96
600
30
3.6
3.6
600
100
80
300
20
10
40:60
33:66
800
500
-
-
160
2
-30
-
98
98
- Hz
- ms
- sec.
- sec.
-
Row3B, Row4B=NR, NR
- ms Row3B, Row4B=NR, R-Vss
-
Row3B,Row4B=R-Vss, NR
-
Row3B,Row4B=R-Vss,R-Vss
- 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
100 ms Memory dialing
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Vmtac
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Vstac
Thdrdb
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48
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37
-
(-23.3)
(dBm)
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53
58 mVms
(-25.3)
(dBm)
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42
47 mVms
280
- ms
Vdd =2.0V ~ 5.5V
Vdd =2.0V ~ 5.5V
Tbit 3.8 3.9 4.1 ms
Tdly
-
300
- ms
* This specification are subject to be changed without notice.
10.1.1997 12
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