Overview
The LA7566 is a VIF/SIF IC that supports PAL and
NTSC multisound and that adopts a semi-adjustment-free
system. To simplify adjustment, the VIF block adopts a
technique in which AFT adjustment is no longer required
by VCO adjustment. The SIF block supports audio multi-
detection by adopting a PLL detection technique. The SIF
block provides 4 inputs with IC internal switching for easy
design of multi-sound systems. Additionally, these
switches can also be used for video system sound trap
switching. The LA7566 also includes a buzz canceller that
suppresses Nyquist buzz to achieve improved audio
quality.
Functions
[VIF Block]
VIF amplifier PLL detector BNC RF AGC
EQ amplifier AFT IF AGC Buzz canceller
[First SIF Block]
First SIF amplifier First SIF detector AGC
[SIF Block]
Multiple input switch Limiter amplifier PLL FM
detector
Features
No coils are used in the AFT and SIF blocks, making
these circuits adjustment free.
PAL / NTSC multisound system can be constructed
easily.
Built-in buzz canceller for excellent audio performance
Package Dimensions
unit: mm
3067-DIP24S
Monolithic Linear IC
31398HA (OT) No. 5764-1/11
SANYO: DIP24S
[LA7566]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL
and NTSC Multisound Support
LA7566
Ordering number : EN5764
Ambient temperature, Ta — °C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
10
V
Circuit voltage
V7, V9, V10, V17
VCC
V
I1
–2
mA
Circuit current
I13
–3
mA
I18
–10
mA
Allowable power dissipation
Pd max
720
mW
Operating temperature
Topr
–20 to +70
°C
Storage temperature
Tstg
–55 to +150
°C
Specifications
Maximum Ratings at Ta = 25°C
Allowable
power
dissipation,
Pd
max
—
W