MITSUBISHI ICs (TV)
M52342FP
PLL-SPLIT VIF/SIF IC
DESCRIPTION
The M52342FP 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
24 EQ F/B
23 APC FILTER
22 VIDEO OUT
21 Vreg. OUT
20 Vreg. OUT
19 VCO COIL
18 VCO COIL
17 Vcc
16 Vcc
15 QIF OUT
14 AFT SW/NPSW
13 LIMITER IN
PIN CONFIGURATION (TOP VIEW)
FEATURES
RF AGC OUT
VIF IN
VIF IN
GND
GND
GND
QIF DET IN
•
•
•
•
•
Video detection output is 2V
P-P
. It has built-in EQ AMP.
The package is a 24-pin flat package, 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.
M52342FP
IF AGC FILTER 10
NFB 11
AUDIO OUT 12
•
•
Outline 24P2N-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
EQ F/B
24
APC FILTER
Vreg. OUT
VCO COIL
VIDEO OUT
VCO COIL
Vreg. OUT
20
18
23
21
19
22
Vcc
17
Vcc
16
QIF OUT
LIMITER IN
AFT SW/NPSW
15
14
13
Vcc REG
VCO
AFT
QIF DET
EQ
AMP
VIDEO
DET
QIF AGC
APC
QIF AMP
FM DET
Inter
Split
LIM AMP
RF AGC
IF AGC
VIF AMP
AF AMP
1
2
3
4
5
VIF IN
6
GND
7
GND
8
GND
9
10
11
12
AUDIO OUT
RF AGC DELAY
RF AGC OUT
AFT OUT
VIF IN
IF AGC FILTER
NFB
QIF DET IN
1
MITSUBISHI [ MITSUBISHI ELECTRIC SEMICONDUCTOR ]
