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參數(shù)資料
| 型號(hào)： | S1T8527C |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 1 CHIP CLP SUBSYSTEM IC |
| 中文描述： | 1芯片集成電路中電子系統(tǒng) |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 185K |
| 代理商： | S1T8527C |
S1T8527C
1 CHIP CLP SUBSYSTEM IC
4
PIN DESCRIPTION
Pin No
Symbol
Description
1
PDT3
Phase detector output terminal of the transmitter at PLL.
If f
TX
> f
REF
or f
TX
is leading
→
the output is negative pulse
If f
TX
< f
REF
or f
TX
is lagging
→
the output is positive Pulse
if f
TX
= f
REF
and the same phase
→
the output is High Impedance
Compressor output terminal of compander; connected to the splatter filter amp input
terminal.
2
CO
3
SFI
Input terminal of Splatter filter amp.
4
SFO3
Output terminal of Splatter filter amp.
5
LDT/CDO
LDT: Output terminal of transmitter lock detector in PLL block. The output is low if PLL
is in lock state and the output is high if PLL is in unlock state.
CDO: As an output terminal of the carrier detector buffer, connected to (RSSI )
terminal of MCU. This pin outputs the contents of Meter Driver buffer which is
turned on / off, according to the signal level detected by Meter Driver.
6
GND
PLL
Ground.
Ground of logic section at PLL.
7
8
9
CLK
DATA
EN
These pins are serial interface terminals for programming reference counter, auxiliary
reference counter, TX channel counter, RX channel counter and control block that
controls internal each block with test mode and power saving mode.
10
LBD
Low Battery Detecting output. ( Selectable 3.45V, 3.3V, 3.0V, 2.2V, 2.0V ). During
the normal operation, output level is low, but it is high at low battery detection. As this
pin is an open collector type, it requires a pull - up resistor.
11
AGIC
This pin bypasses AC elements at the feedback loop which come from the SUM amp
block of COMPRESSOR. A capacitor should be connected between this terminal and
GND. ( C = 2.2uF )
12
CRC
Converts waveform from the full wave rectifier to DC element at the rectifier block of
Compressor. ( RC = 33msec )
13
CPI -
Pre-amp inverting input terminal of Compressor.
Adjusts the negative feedback loop gain. ( in application, gain is 5 )
14
CPI +
Pre-amp non-inverting input terminal of Compressor.
Used as an input terminal for voice signals.
15
GND
(COMP)
Vcc
(COMP)
Ground of Compander block.
16
Supply voltage.
Power supply terminal of Compander.
17
SAO 2
Output terminal of speaker amp 2.
This signal is the same as SAO1 output, but phase difference is180
°
for SAO1.
DC voltage level is ( Vcc — 0.7V ) / 2.
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