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Part: CXA1870S
Category:
Description: Color TV Y/c/jungle
Company: Sony Electronics
Datasheet: Download CXA1870S datasheet File size : 399 kB
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CXA1870S
Color TV Y/C/Jungle For the availability of this product, please contact the sales office.
Description The CXA1870S is a bipolar IC which integrates the N T S C color TV luminance signal processing, chroma signal processing, sync signal processing, and RGB signal processing onto a single chip. Features · I2C bus compatible. Various types of adjustments and user controls performed with two bus lines SCL and SDA. · H and V oscillation frequencies made nonadjusting with a countdown system. · Non-adjusting Y system filters (chroma trap, delay line) · Built-in V picture distortion correction circuit · Built-in delay line aperture compensation · A u t o cut-off function for automatic CRT cut-off adjustment and compensation for changes with time · Multiple inputs Composite video: 2 systems (Built-in 2-input, 1-output video switch) Y/C separation input: 1 system On screen display input: 1 system Applications · Color TV Structure Bipolar silicon monolithic IC 42 pin SDIP (Plastic)
Absolute Maximum Ratings (Ta=25 °C) · Supply voltage VCC 12 V · Operating temperature Topr 20 to +75 °C · Storage temperature Tstg 65 to +150 °C · Allowable power dissipation PD 1.73 W Recommended Operating Conditions Supply voltage VCC 9±0.5
V
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
--1--
E95431-TE
Block Diagram
ABL LPF
J GND
AFC
H S/S OUT V SYNC V BIAS V HOLD XRAY
ABL IN
V PLS
VOSC
REG
SCL HD VD HP
34 32 41 33 31 30 29
H SYNC
CERA
V LPF
IREF
I2C BUS DECODER PHASE DET. 1/32 H.DRIVE 2fH V.SYNC SEP PHASE SHIFT V COUNT DOWN HV COMP V COMPENSATION VOSC ABL
SDA
38
37
35
40
36
39
5
27 ABL V ZOOMING
28 26 42 25 23
24
REGU LATOR XRAY V OFF
32fH VCO PHASE DET
IREF
H.SYNC SEP
XRAY
VEX C MODE
6
AFC HLOCK H PHASE SUB BRIGHT BRIGHT
V LIN
V SIZE
V SHIFT
S CORR
IN SW
SW GAIN
SW OUT V1 IN
4
BLACK PICTURE
DC TRAN
SHARPNESS
0/6DB AMP
PMUTE
B OFF
G OFF
R OFF
DY COL
B DRIVE
GAMMA
PRE OVER
G DRIVE
RGB LIM
V2 IN OSD
NR BLUE
22
TRAP SW
SUB CONT
16 RGB SW PIC OSD DYNAMIC TURE MIX COLOR GAMMA BRIGHT DRIVE LIMIT DC SHIFT REF BLK G CUTOFF 18 20
Y IN
ROUT GOUT BOUT
--2--
SUB HUE OSD BLK AXIS CHROMA DET. AXIS PHASE DET. HUE HUE LPF 3.58M VCO PHASE SHIFT
7
BUS CONT
TRAP
AUTO Y/C MIX YM DELAY SHARP NR CLAMP PEDESTAL CLAMP NESS
DELAY
SUB COLOR B CUTOFF AKB TIMING AKB
ACC DET. TOT SW COLOR
C IN
9
ACC
TOT IK
COLOR
COLOR KILLER
CLAMP
VCC
3
KILLER
2
X'TAL A PED APC
1
8
10
11
12
13
14
21
15
17
19
IK
R S/H
OSD BLK
B S/H
G S/H
V GND
OSD R
OSD B OSD G
CXA1870S
CXA1870S
Pin Configuration
X'TAL
1 2 3 4 5 6 7 8 9
42
V BIAS
APC
41
V SYNC
VCC
40
H SYNC
V1 IN
39
H S/S OUT
V HOLD
38 SDA
SW OUT
37 SCL
Y IN
36 REG
A PED
35
IREF
C IN
34
AFC
V GND 10
33
CERA
OSD BLK 11
32
J GND
OSD R 12
31 HP
OSD G 13
30
XRAY
OSD B 14
29 HD
R S/H 15
28 V PLS
R OUT 16
27
V LPF
G S/H 17
26 V OSC
G OUT 18
25
ABL LPF
B S/H 19
24 VD
B OUT 20
23 ABL IN
IK 21
22
V2 IN
--3--
CXA1870S
Pin Description Pin No. Symbol Pin voltage Equivalent circuit Description
VCC
4k
1
X'TAL
2.6 V
1
500
Connect a 3.58 MHz crystal oscillator.
VCC VCC 1.2k
2
2
APC
5V
1.2k
25k
APC lag-lead filter CR connection pin.
3
VCC
9V
VCC
Power supply pin.
4
4 22
V1 IN V2 IN
150
2V
22
Video switch input pins. Sync tip clamping is performed, so input via capacitors.
55k VCC
5
V HOLD
0.7 V
150
1k 50k
Peak hold pin for V sync separation. Connect a capacitor.
5
--4--
CXA1870S
Pin No.
Symbol
Pin voltage
Equivalent circuit
Description
VCC VCC 500
VCC
6
SW OUT
--
6
2k
30k 12k
Video switch output pin.
25k
VCC VCC 1.2k 50k
7
Y IN
3.5 V
7
Y signal input pin. Input via a capacitor. Standard input level: 2 Vp-p
VCC VCC
VCC
VCC
16k
20k 1.2k 20k
8
A PED
3.5 V
8
Auto pedestal (black elongation) black peak hold pin. Connect a capacitor.
VCC 30k
9
C IN
--
9
6k 30k 6k
Chroma signal input pin. Standard input level (burst level): 570 mVp-p
10
V GND
--
Video system (Y/C/RGB) GND pin.
--5--
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