Ordering number: EN 4037C
Monolithic Linear IC
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 fil-
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
• Employs split processing for wide bandwidth video
characteristics
• PLL detector with buzz canceler for excellent buzz and
buzz beat characteristics
• APC time constant switch built-in
• High-speed AGC supports double time constant method
• SIF carrier level AGC in the 1st SIF stage for good SIF
weak electric field characteristics
• Good differential gain and phase characteristics
• RF AGC easily adjusted using a variable resistor
Functions
VIF stage
•
•
•
•
•
•
•
•
•
•
•
•
VIF amplifier
PLL detector
B/W noise canceler
RF AGC
VCO
Equalizer amplifier
AFT
APC detector
APC filter
Lock detector
IF AGC
Buzz canceler
Package Dimensions
unit: mm
3067-DIP24S
[LA7577N]
1st SIF stage
• Preamplifier with AGC
• 1st SIF detector
SIF stage
• SIF limiter amplifier
• FM quadrature detector
Mute stage
• Sound mute (pin 2)
• AV mute (pin 4)
• IS-15 switch (pin 13)
Specifications
Absolute Maximum Ratings
at Ta = 25
°
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
≤
50
°
C
Conditions
Ratings
13.8
1200
V
CC
V
CC
V
CC
Unit
V
mW
V
V
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—1/16
SANYO [ SANYO SEMICON DEVICE ]
