LA7578N Datasheet, PDF (1/18 Pages) Sanyo Semicon Device – IF Signal Processing (Super PLL-II VIF + SIF) Circuit for TVs and VCRs

Ordering number: EN 4952
Monolithic Linear IC
LA7578N
IF Signal Processing (Super PLL-II VIF + SIF)
Circuit for TVs and VCRs
Overview
The LA7578N is an intercarrier-type VIF + SIF IC that
supports excellent sound quality and image quality.
The pin assignment of the LA7578N is identical to that of the
LA7577N, allowing the LA7577N to be used for split systems
while the LA7578N is used for intercarrier systems. In
addition, the LA7578N suppresses Nyquist buzz interference
by using a PLL detection system with a buzz canceller in order
to provide the best sound quality possible.
Package Dimensions
unit : mm
3067-DIP24S
[LA7578N]
Functions
[VIF Block]
. _{VIF amplifier}
. _VCO
. _{APC filter}
. _{B/W NC}
. _AFT
. _{IF AGC}
.^{[SIF Block]}
Limiter amplifier
[Mute]
. _{Audio mute (pin 2)}
. _{IS-15 switch (pin 13)}
. _{PLL detector}
. _{Equalizer amplifier}
. _{Lock detection}
. _{RF AGC}
. _{APC detector}
. _{Buzz canceller}
. _{FM quadrature detector}
. _{AV mute (pin 4)}
.Features
Excellent buzz and buzz-beat characteristics due to PLL
detection system with buzz canceller.
. _{Built-in APC time constant switch.}
. _{Duplicate time constant system suited for high-speed AGC.}
. _{Excellent DG and DP characteristics.}
. _{RF AGC adjustment is simple.}
SANYO : DIP24S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
81095HA (II)No.4952 - 1/18