SC91710A 查看數據表（PDF） - Silan Microelectronics
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SC91710A Datasheet PDF : 17 Pages
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SC91710A/B
(Continued)
Characteristics
Symbol
Conditions
Min. Typ. Max. Unit
Inter-digit Pause
Pulse rate=10pps
tIDP
Pulse rate=20pps
--
800
--
ms
--
500
--
Tone Mode
DC Level
Vdc VDD=2.0V~5.5V
0.5VDD
--
0.7VDD
V
Tone
Sink Current
Itl Vdtmf=0.5V
0.2
--
--
mA
Output Pin AC level
Vdtmf Row groupˈRL=10KΩ
130
155
170 mVrms
Load Resistor
RI Dist.≤ -23dB
10
--
--
KΩ
DTMF
Signal
Pre-emphasis
Distortion(note 2)
twist
Dist.
VDD=2.0~5.5 V,
Column-Row group
RL=10KΩ
1
2
3
dB
--
-30
-23
dB
Minimum tone duration Time
tTD Auto redial
--
98/83
--
ms
Minimum Intertone Pause Time tITP Auto redial
--
98/83
--
ms
Note: 1. Vn: Input voltage of any keyboard scanning pin (Row group, Column group)
2ˊDistortion (dB) = 20log{[V12+V22+V32+… Vn2)1/2]/[(VL2+VH2)1/2]}
VL,VH: Row group and Column group signal , V1ˈV2… ˈVn: Harmonic signal (BW = 300Hz~3500Hz)
ACTUAL FREQUENCY OUTPUT (fosc=3.579545MHz)
Keyboard Scanning Pin
R1
f1
R2
f2
R3
f3
R4
f4
C1
f5
C2
f6
C3
f7
Standard(Hz)
697
770
852
941
1209
1336
1477
Output
699
766
848
948
1216
1332
1472
Deviation(%)
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
PIN CONFIGURATION
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:2.2 2007.03.07
Page 4 of 18
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