PLL-SPLIT VIF/SIF IC
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC DESCRIPTION
The M52761 is IF signal-processing IC for VCRs and TVs...
Description
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC DESCRIPTION
The M52761 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 20 EQ F/B 19 APC FILTER 18 VIDEO OUT
PIN CONFIGURATION (TOP VIEW)
FEATURES
RF AGC OUT VIF IN VIF IN GND QIF DET IN IF AGC FILTER NFB
M52761SP/FP
Video detection output is 2VP-P. It has built-in EQ AMP. 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 double 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. This IC corresponds to only NTSC system.
4 5 6 7 8 9
17 Vreg. OUT 16 VCO COIL 15 VCO COIL 14 Vcc 13 QIF OUT 12 IF AGC FILTER 11 LIMITER IN
AUDIO OUT 10
Outline 20P4B (SP) 20P2N-A (FP)
APPLICATION
TV sets, VCR tuners
RECOMMENDED OPERATING CONDITION
In case of Vcc and Vreg. out short Supply voltage range.................................................
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