S1T8515A PDF даташит
Спецификация S1T8515A изготовлена «Samsung semiconductor» и имеет функцию, называемую «FM IF RECEIVER FOR FLEX PAGER». |
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Детали детали
Номер произв | S1T8515A |
Описание | FM IF RECEIVER FOR FLEX PAGER |
Производители | Samsung semiconductor |
логотип |
6 Pages
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FM IF RECEIVER FOR FLEX PAGER
INTRODUCTION
The S1T8515A is a designed for FM detection on the FLEX pager set.
It consists of an Oscillator, Mixer, Limiting IF Amp. Quadrature
Detector, Regulator, RSSI (Received Signal Strength Indicator), Bit
Rate Filter, and a 2-level / 4-level FSK comparator.
It has a 24-SSOP (0.65mm)Surface Mount Package.
24−SSOP−BD209
FEATURES
• Internal A/D converter for 4 level FSK (2-bit ADC)
• High transmission rate: 6400bps (Max.)
• Operating voltage range: VCC1 = 1.1 ~ 4.0V
• Typical supply current: 1.5mA at 1.4V
• Low battery detection circuit (alarm function): 1.05V
• Mixer operating frequency: 10 ~ 50MHz
• Package type: 24-SSOP (0.65mm)
ORDERING INFORMATION
Device
S1T8515A01-U0B0
Package
24−SSOP−BD209
Operating Temperature
−20°C ~ +70°C
S1T8515A
1
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S1T8515A
FM IF RECEIVER FOR FLEX PAGER
BLOCK DIAGRAM
MI GND REGO REGC AO FSKO1 FSKO2 BSC
24 23 22 21 20 19 18 17
QC1
16
QC2 FSKR2 RSSI
15 14 13
2nd
MIX
1.0V Regulator Alarm
FSK
Comparator
Quick
Charge
X-tal
Osc.
123
OSCI OSCO MO
Limiting IF
Amplifier
Quad
Detector
456789
Vcc LI LD FSKR1 QD C1
Bit-rate Filter
10 11 12
C2 C3 FIL VAR
PIN CONFIGURATION
OSCI 1
OSCO 2
MO 3
Vcc 4
LI 5
LD 6
FSKR1 7
QD 8
C1 9
C2 10
C3 11
FIL VAR 12
S1T8515A
24 MI
23 GND
22 REGO
21 REGC
20 AO
19 FSKO1
18 FSKO2
17 BSC
16 QC1
15 QC2
14 FSKR2
13 RSSI
2
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FM IF RECEIVER FOR FLEX PAGER
S1T8515A
PIN DESCRIPTION
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15, 16
17
18
19
20
21
22
23
24
Symbol
OSCI
OSCO
MO
VCC
LI
LD
FSKR1
QD
C1
C2
C3
FIL VAR
RSSI
FSKR2
QC2, QC1
BSC
FSKO2
FSKO1
AO
REGC
REGO
GND
MI
Description
Oscillator input (Base). The oscillator is an internally biased colpitts type.
Oscillator output (Emitter).
Mixer output (Output impedance ≈ 1.5kΩ) Connect a 455kHz filter between this pin
and the LI.
Power supply voltage.
IF limiter amplifier input (Input impedance ≈ 1.5kΩ).
Bypass capacitor connect pin for the IF limiter amp.
Differential Amp Reference input on the FSK comparator.
Quadrature detection, phase shiftier input.
Capacitors for bit-rate filter.
Bit-rate filter selection.
High: Internal cut-off frequency will be set to Low.
Low: Internal cut- off frequency will be set to High.
RSSI output.
The power of received RF signal can be detected by monitoring the limiter amplifier.
Differential Amp Reference input on the FSK comparator for 4-Level FSK Detection.
Quick charge control 2 & 1.
High: Quick charge-discharge on. Low: Quick charge-discharge off.
Battery saving control.
High: Battery saving off-normal mode operation.
Low: Battery saving on-battery save mode operation.
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.
The final output signal will be output to the MSB after 4-Level FSK detection.
Alarm output.
This pin becomes high, when VCC drops below 1.05V.
S1T8515A has an internal PNP transistor.
But, it also can support an external PNP transistor to control the power.
Regulated voltage output.
Ground.
Mixer input (Input impedance ≈ 1.5kΩ).
3
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Номер в каталоге | Описание | Производители |
S1T8515A | FM IF RECEIVER FOR FLEX PAGER | Samsung semiconductor |
S1T8515A | FM IF RECEIVER FOR FLEX PAGER | Samsung semiconductor |
S1T8515A01 | FM IF RECEIVER FOR FLEX PAGER | Samsung semiconductor |
S1T8515A01-U0B0 | FM IF RECEIVER FOR FLEX PAGER | Samsung semiconductor |
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