Silan
Semiconductorsꢀ
SC9302 Series
ꢀ
TONE MODE ELECTRICAL CHARACTERISTICS
(Tamb=25°C, fosc=3.5795MHz,unless otherwise specified)
Test Conditions
Parameter
Symbol
Min
Typ
Max Unit
V
Condition
DD
DTMF Output DC Level
DTMF Sink Current
VTDC
ITOL
VTAC
RL
--
--
0.45VDD
--
--
0.7VDD
--
V
2.5V VDTMF =0.5V
0.1
0.12
5
mA
DTMF Output AC Level
DTMF Output Load
--
Row group, RL =5kΩ
0.155
--
0.18 Vrms
2.5V THD ≤ -23dB
2.5V Row group = 0dB
2.5V RL =5kΩ
--
3
kΩ
dB
dB
Column Pre-emphasis
Tone Signal Distortion
ACR
THD
1
2
--
-30
82.5
100
85.5
106
-23
--
Others
9302G
Others
9302G
--
Minimum Tone Duration
Minimum Inter-tone Pause
THD (Distortion)(dB)=20log
TTMIN
--
--
Auto-redial
ms
ms
--
--
--
--
TITPM
Auto-redial
--
--
2
1
2
2
2
n
2
i
2
h
(
V
+ V +...+ V
/
V
+ V
)
Vi, Vh: Row group and column group signals
V1,V2, …Vn: Harmonic signals (BW=300Hz~3500Hz)
APPROXIMATE INTERNAL CONNECTION CIRCUITS
CMOS IN
Pull-High
CMOS IN/OUT
DD
NMOS OUT
CMOS IN
CMOS OUT
DD
V
V
VDD
CMOS IN
Pull-Low
OSCILLATOR
X1
X2
10MΩ
20pF
10pF
EN
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0
ꢀ
2001-11-01ꢀ
8
SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
