Samsung S1T8515A01-U0B0 Datasheet
FM IF RECEIVER FOR FLEX PAGER S1T8515A
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.
FEATURES
• Internal A/D converter for 4 level FSK (2-bit ADC)
• High transmission rate: 6400bps (Max.)
• Operating voltage range: V
• 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)
= 1.1 ~ 4.0V
CC1
ORDERING INFORMATION
24−SSOP−BD209
Device Package Operating Temperature
S1T8515A01-U0B0 24−SSOP−BD209 −20°C ~ +70°C
1
S1T8515A FM IF RECEIVER FOR FLEX PAGER
BLOCK DIAGRAM
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
X-tal
Osc.
1 2 3 4 5 6 7 8 9
OSCI OSCO MO Vcc LI LD FSKR1 QD C1 C2 C3 FIL VAR
PIN CONFIGURATION
1.0V Regulator Alarm
Limiting IF
Amplifier
1
OSCI
MO
Vcc
LD
2
3
4
5
LI
6
S1T8515A
OSCO
FSK
Comparator
Quad
Detector
24
MI
23
GND
22
REGO
21
REGC
20
AO
19
FSKO1
Quick
Charge
Bit-rate Filter
10 11 12
FSKR1
QD
C1
C2
C3
FIL VAR
10
11
12
7
8
9
18
17
16
15
14
13
FSKO2
BSC
QC1
QC2
FSKR2
RSSI
2
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