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Ordering number: EN 4037C

Monolithic Linear IC

LA7577N

Super-split PLL-

II

VIF and SIF

IF Signal Processor for TV/VTRs

Overview

The LA7577N is a high tone quality and high picture qual-

ity, video IF and sound IF IC. It employs split processing

of the video IF signal and sound IF signal using SAW 鏗乴-

ters and a PLL detector. Further, the PLL detector incorpo-

rates a buzz canceler for Nyquist buzz interference

suppression to achieve high tone quality.

Features

鈥?Employs split processing for wide bandwidth video

characteristics

鈥?PLL detector with buzz canceler for excellent buzz and

buzz beat characteristics

鈥?APC time constant switch built-in

鈥?High-speed AGC supports double time constant method

鈥?SIF carrier level AGC in the 1st SIF stage for good SIF

weak electric 鏗乪ld characteristics

鈥?Good differential gain and phase characteristics

鈥?RF AGC easily adjusted using a variable resistor

Functions

VIF stage

鈥?/div>

VIF ampli鏗乪r

PLL detector

B/W noise canceler

RF AGC

VCO

Equalizer ampli鏗乪r

AFT

APC detector

APC 鏗乴ter

Lock detector

IF AGC

Buzz canceler

Package Dimensions

unit: mm

3067-DIP24S

[LA7577N]

1st SIF stage

鈥?Preampli鏗乪r with AGC

鈥?1st SIF detector

SIF stage

鈥?SIF limiter ampli鏗乪r

鈥?FM quadrature detector

Mute stage

鈥?Sound mute (pin 2)

鈥?AV mute (pin 4)

鈥?IS-15 switch (pin 13)

Speci鏗乧ations

Absolute Maximum Ratings

at Ta = 25

擄

C

Parameter

Maximum supply voltage

Allowable power dissipation

Symbol

V

CC

max

Pd max

V

3

, V

13

Circuit voltages

V

11

V

23

Ta

鈮?/div>

50

擄

C

Conditions

Ratings

13.8

1200

V

CC

V

CC

V

CC

Unit

V

mW

V

SANYO Electric Co., Ltd. Semiconductor Business Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

60597HA(ID) / 11795TH(ID) No. 4037鈥?/16

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LA7577N Datasheet

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