參數(shù)資料
型號(hào)： MSM7715
廠商： OKI SEMICONDUCTOR CO., LTD.
英文描述： Multi-Function Telecommunication LSI
中文描述： 多功能通信大規(guī)模集成電路
文件頁(yè)數(shù)： 5/21頁(yè)
文件大?。?/td> 150K
代理商： MSM7715
Semiconductor
MSM7715
5/21
V
DD
AIN
Pin No.
29
31
I/O
—
Name
Description
Power supply. Supply +2.5V to 3.6V.
Input for the analog receiving signal.
I
SGO
32
O
Output for the signal ground voltage. The output voltage is 1/2 V
DD
.
Connect a capacitor of 0.1
m
F or more between SGO and GND.
SGC
34
Pin for connecting the capacitor of the signal ground voltage generating circuit.
Connect a capacitor of 1
m
F or more between SGC and GND.
Input for the sending output level-adjusting amplifier.
Output for the sending output level-adjusting amplifier.
Output for the sending modem signal.
Output for the DTMF signal.
GAT1
GAT2
MOD
DTO
35
36
37
38
I
O
O
O
VR1
39
O
Output for the reference voltage generating circuit.
The potential difference between VR1 and SGO is approximately +0.75 V.
Input for external adjustment of the modem’s carrier detection level.
Ground.
VR2
GND
DTG1
DTG2
DTG3
40
41
42
43
44
I
I*
Inputs for specifying the DTMF code to be sent.
Data is latched at the falling edge of
TEN
.
—
—
Note:
Digital inputs that are pulled up internally by a high resistance.
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