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
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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
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鈥?/16
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