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參數(shù)資料
| 型號： | S1T8515A |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | FM IF RECEIVER FOR FLEX PAGER |
| 中文描述： | 對于Flex調(diào)頻中頻傳呼機 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 85K |
| 代理商： | S1T8515A |
FM IF RECEIVER FOR FLEX PAGER
S1T8515A
3
PIN DESCRIPTION
Pin No
Symbol
Description
1
OSCI
Oscillator input (Base). The oscillator is an internally biased colpitts type.
2
OSCO
Oscillator output (Emitter).
3
MO
Mixer output (Output impedance
≈
1.5k
) Connect a 455kHz filter between this pin
and the LI.
4
V
CC
LI
Power supply voltage.
5
IF limiter amplifier input (Input impedance
≈
1.5k
).
6
LD
Bypass capacitor connect pin for the IF limiter amp.
7
FSKR1
Differential Amp Reference input on the FSK comparator.
8
QD
Quadrature detection, phase shiftier input.
9
10
11
C1
C2
C3
Capacitors for bit-rate filter.
12
FIL VAR
Bit-rate filter selection.
High: Internal cut-off frequency will be set to Low.
Low: Internal cut- off frequency will be set to High.
13
RSSI
RSSI output.
The power of received RF signal can be detected by monitoring the limiter amplifier.
14
FSKR2
Differential Amp Reference input on the FSK comparator for 4-Level FSK Detection.
15, 16
QC2, QC1
Quick charge control 2 & 1.
High: Quick charge-discharge on. Low: Quick charge-discharge off.
17
BSC
Battery saving control.
High: Battery saving off-normal mode operation.
Low: Battery saving on-battery save mode operation.
18
FSKO2
The output signal from the Bit-rate filter is compared with FSK Reference signal, and
the final output signal will be output to the LSB after 4-Level FSK detection.
19
FSKO1
The final output signal will be output to the MSB after 4-Level FSK detection.
20
AO
Alarm output.
This pin becomes high, when V
CC
drops below 1.05V.
S1T8515A has an internal PNP transistor.
But, it also can support an external PNP transistor to control the power.
21
REGC
22
REGO
Regulated voltage output.
23
GND
Ground.
24
MI
Mixer input (Input impedance
≈
1.5k
).
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