Lv4512v, Tuner ic – Sanyo EP58B User Manual
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LA79106V
41
42
SANYO TV . VCR
SANYO TV . VCR
LV4512V
1
2
4
3
5
6
7
8
9
10
11
12
24
23
21
22
20
19
18
17
16
15
14
13
VHF
L
UHF
VHF
H
REG
IFT1
IFT2
GND
UIN1
UIN2
VLIN
VHIN1
VHIN2
V
CC
OSCOUT1
OSCOUT2
BANDSW
UOSC1
VLOSC1
UOSC2
VLOSC2
UOSC3
VHOSC1
UOSC4
VHOSC2
VHOSC3
GND
IFOUT1
IFOUT2
I
2
C
BUS
I/F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
S/R
1/512,640,1024
Programable DIV
Phase
Det
SW
Ref OSC
Lock
3V MOS
Charge
Pump
REG
UHF
OSC
VHF
OSC
REG
1/8
16/17
SCL
SDA
ADR
FMT
BVL
BVH
BU
V
CC
1
Mixout1
Mixout2
GND1A
VHFin1
VHFin2
UHFin1
UHFin2
VOSCC1
GND1B
VOSCC2
UOSCB1
UOSCE1
UOSCE2
UOSCB2
IFOUT
REG3
CPE
CPO
4MOSC
V
CC
3
V
CC
2(PLL)
GND2(PLL)
Tuner IC
Tuner IC
Overview
Functions
Block Diagram
Block Diagram
The LA79106V is a voltage synthesized tuner IC that integrates mixers for three bands (VHF (low), VHF (high), and UHF) and an
oscillator circuit on a single chip.
The LV4512V integrates local oscillator circuits for the VHF and UHF bands, mixers, an IF amplifier, and a PLL circuit for tuning
on a single chip. It is controlled using an I
2
C bus.
PLL circuit for tuning
I
2
C bus control
Frequency steps (31.25, 50, and 62.5 kHz when a reference frequency of 4 MHz is used)
Four on-chip Banol switches
Can be controlled at any one of four I
2
C bus addresses
Supply voltage: VCC = 5 V
Package: SSOP30 (275mil)
Double balanced mixer (base input): VHF (low)
Double balanced mixers (emitter input): VHF (high) and UHF
Lo output pin
Built-in mixer and oscillator regulator
Supply voltage: VCC = 5 V
Package: SSOP24 (275 mil)
Overview
Functions