DS_S1T8515A01 Datasheet, PDF (5/6 Pages) Samsung semiconductor – FM IF RECEIVER FOR FLEX PAGER

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
1
2
3
4
5
6
7
8
9
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
+
1000p _1200p 1500p
10µ _CDBM
455
3.3K
HL
+
10u
5