1
ICs for TV
n Overview
The AN5170K is a VIF/SIF signal processor IC for
NTSC TVs and VCRs. The SIF part needs no coil and
requires no adjustment. The AFT part needs no coil, and
is adopted quasi-separate sound (QSS) method.
n Features
• The SIF part adopts PLL detection, needs no coil, and
requires no adjustment.
• The AFT part uses APC voltage, eliminating the need
of a coil.
• QSS technique is employed for better buzz characteris-
tics and audio sensitivity.
• EQ amplifier is used for video frequency-characteristics
correction.
• Low power consumption (5.0V, 48mA)
• The AFT output circuit has its own power supply, V
CC2
(from V
CC1
to 12.5V), to be compatible with various
types of tuners.
AN5170K
VIF/SIF signal processor IC for TV and VCR
6.2– 0.3
4.7– 0.25
3.05– 0.25
1.1– 0.25
1.778
0.5
–
0.1
0.9
–
0.25
7.62– 0.25
3 ~ 15˚
0.3
+ 0.1
– 0.05
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
21.7
–
0.3
Unit : mm
24-Pin Shrunk DIL-Plastic Package (SDIP024-P-0300)
24 23 22 21 20 19 18 17 16 15 14 13
12 4 5 6 7 8 9 10 11 123
LIM
AMP
AUD
AMP
VIF
AMP
QIF
AMP
SAPC SVCO
RFAGC
IFAGC
QAGC
DET
LDET
QDET
EQAMPNI
VCO
CTRL
APC
VCO
PST
REG
AFT
SIF
IN
IF
AGC
QDET
OUT
IF
DET
DET
IN
FEED
BACK
VIDEO
OUT
VCC2VCC1 APC VCO VCO
SPLL SDEC AUDIO
OUT
RFAGC
OUT
RFAGC
ADJ
VIF
IN
VIF
IN
QIF
IN
GND REG LDET AFT
OUT
n Block Diagram