MITSUBISHI ICs (TV)
M52342SP
PLL-SPLIT VIF/SIF IC
DESCRIPTION
The M52342SP is IF signal-processing IC for VCRs and TVs. It
enable the PLL detection system despite size as small as that of
conventional quasi-synchronous VIF/SIF detector, IF/RF AGC, SIF
limiter, FM detector, QIF AGC and EQ AMP.
RF AGC DELAY
AFT OUT
1
2
3
4
5
6
7
8
9
20 EQ F/B
19 APC FILTER
18 VIDEO OUT
17 Vreg. OUT
16 VCO COIL
15 VCO COIL
14 Vcc
13 QIF OUT
12 AFT SW/NPSW
11 LIMITER IN
PIN CONFIGURATION (TOP VIEW)
FEATURES
RF AGC OUT
VIF IN
VIF IN
GND
QIF DET IN
IF AGC FILTER
NFB
•
•
•
•
•
Video detection output is 2V
P-P
. It has built-in EQ AMP.
The package is a 20-pin shrink-DIP, suitable for space saving.
The video detector uses PLL for full synchronous detection
circuit. It produces excellent characteristics of DG, DP, 920kHz
beat, and cross color.
Dynamic AGC realizes high speed response with only single
filter.
Video IF and sound IF signal processings are separated from
each other. VCO output is used to obtain intercarrier. This PLL-
SPLIT method and built-in QIF AGC provide good sound
sensitivity and reduces buzz.
As AFT output voltage uses the APC output voltage, VCO coil is
not used.
Audio FM demodulation uses PLL system, so it has wide
frequency range with no external parts and no adjustment.
M52342SP
AUDIO OUT 10
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•
Outline 20P2N-A
APPLICATION
TV sets, VCR tuners
RECOMMENDED OPERATING CONDITION
In case of V
CC
and Vreg. out short
Supply voltage range....................................................4.75 to 5.25V
Recommended supply voltage...................................................5.0V
Incase of Vreg. out open
Supply voltage range......................................................8.5 to 12.5V
BLOCK DIAGRAM
APC FILTER
Vreg. OUT
VCO COIL
VIDEO OUT
VCO COIL
19
18
17
16
15
QIF OUT
LIMITER IN
AFT SW/NPSW
13
12
11
EQ F/B
20
Vcc
14
Vcc REG
VCO
AFT
Inter
Split
LIM AMP
QIF DET
EQ
AMP
VIDEO
DET
QIF AGC
APC
QIF AMP
FM DET
RF AGC
IF AGC
VIF AMP
AF AMP
1
2
3
4
5
VIF IN
6
GND
7
8
9
10
AUDIO OUT
RF AGC DELAY
RF AGC OUT
AFT OUT
VIF IN
QIF DET IN
NFB
IF AGC FILTER
1
MITSUBISHI [ MITSUBISHI ELECTRIC SEMICONDUCTOR ]
