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DS_S1T8515A01 Datasheet(Fiches technique) 3 Page - Samsung semiconductor

Numéro de pièce DS_S1T8515A01
Description  FM IF RECEIVER FOR FLEX PAGER
Télécharger  6 Pages
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Fabricant  SAMSUNG [Samsung semiconductor]
Site Internet  http://www.samsung.com/Products/Semiconductor
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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
≈ 1.5kΩ) Connect a 455kHz filter between this pin
and the LI.
4
VCC
Power supply voltage.
5
LI
IF limiter amplifier input (Input impedance
≈ 1.5kΩ).
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 VCC drops below 1.05V.
21
REGC
S1T8515A has an internal PNP transistor.
But, it also can support an external PNP transistor to control the power.
22
REGO
Regulated voltage output.
23
GND
Ground.
24
MI
Mixer input (Input impedance
≈ 1.5kΩ).




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