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PDF S1T8515A Data sheet ( Hoja de datos )
| Número de pieza | S1T8515A | |
| Descripción | FM IF RECEIVER FOR FLEX PAGER | |
| Fabricantes | Samsung semiconductor | |
| Logotipo |  |
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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
1 page  
FM IF RECEIVER FOR FLEX PAGER
S1T8515A
TEST CIRCUIT
RF Input
Reg. out
2.2µ +
51
1000p
Alarm out FSKO1 FSKO2 Vcc
QC1 QC2 FSKR2 RSSI
100K
100K
100K
LH L
+
10µ
0.1µ
MI GND REGO REGC
AO FSKO1 FSKO2 BSC QC1 QC2 FSKR2 RSSI
24 23 22 21 20 19 18 17 16 15 14 13
2nd
MIX
1.0V Regulator Alarm
FSK
Comparator
Quick
Charge
X-tal
Osc.
Limiting IF
Amplifier
Quad
Detector
123456789
OSCI OSCO MO Vcc LI LD FSKR1 QD C1
Bit-rate Filter
10 11
C2 C3
12
FIL VAR
20.945MHz
56p
39p
0.1µ
CFMW455E
+
10µ CDBM
455
3.3K
+
10u
1000p
1200p 1500p
H
L
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet S1T8515A.PDF ] | |
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