Sony CXA1870S Datasheet

—1—

E95431-TE

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.

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

Description

The CXA1870S is a bipolar IC which integrates the NTSC 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 non-

adjusting 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

• Auto 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

Color TV Y/C/Jungle

42 pin SDIP (Plastic)

CXA1870S

For the availability of this product, please contact the sales office.

—2—

CXA1870S

Block Diagram

COLOR

2f

H

ABL

H PHASE

BOUTGOUTROUT

Y IN

V1 IN V2 IN

C IN

V

CC

TRAP SW

TOT SW

COLOR

SUB HUE

OSD

DRIVE

G DRIVE

B DRIVE

IK

G CUTOFF

B CUTOFF

DC TRAN

SHARPNESS

AFC HLOCK

NR

REF

GAMMA

C MODE

HV COMP

V SHIFT

V SIZE

V LIN

S CORR

V OFF

ABL

PMUTE

R OFF

G OFF

B OFF

SCL

SDA

IREF

H SYNC

REG

AFC

CERA

XRAY

HD

J GND

V SYNC

V PLS

VOSC

VD

ABL IN

ABL LPF

V LPF

V HOLD

HP

H S/S OUT

V BIAS

PICTURE

BRIGHT

SUB BRIGHT

DY COL

AXIS

HUE

SUB COLOR

PRE OVER

BLUE

BLACK

APC

X'TAL

A PED

V GND

IK

R S/H

G S/H

B S/H

OSD BLK

OSD R

OSD G

OSD B

XRAY

LIMIT

RGB LIM

KILLER

I

2

C BUS

DECODER

IREF

REGU

LATOR

H.SYNC

SEP

PHASE

DET.

32fHVCO

1/32

PHASE

DET

PHASE

SHIFT

H.DRIVE

XRAY

VEX

V.SYNC

SEP

V COUNT

DOWN

VOSC

V COMPENSATION

V ZOOMING

BLK

16

18

20

DC

SHIFT

DYNAMIC

COLOR

OSD

MIX

PIC

TURE

RGB

SW

YM

Y/C MIX

CLAMP

AUTO

PEDESTAL

CLAMP

NR

SHARP

NESS

DELAY

TRAP

BUS

CONT

SUB CONT

0/6DB AMP

SW

GAIN

IN

SW

DELAY

AKB

TIMING

CLAMP

OSD BLK

AXIS

CHROMA

DET.

PHASE

SHIFT

3.58M

VCO

LPF

HUE

12

13

14

10

19

17

15

11

21

8

1

2

PHASE

DET.

COLOR

KILLER

TOT

ACC

DET.

3

7

4

6

22

9

31

29

32

26

24

25

23

38

37

36

35

40

34

39

33

30

41

5

27

42

28

SW OUT

—3—

CXA1870S

Pin Configuration

V2 IN

V BIAS

SDA

SCL

V SYNC

H SYNC

H S/S OUT

REG

IREF

AFC

CERA

J GND

HP

XRAY

HD

V PLS

V LPF

V OSC

ABL LPF

VD

ABL IN

X'TAL

V

CC

APC

V1 IN

A PED

Y IN

C IN

V GND

OSD BLK

OSD R

OSD G

OSD B

R S/H

R OUT

G S/H

G OUT

B S/H

B OUT

IK

V HOLD

SW OUT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21 22

23

24

25

26

27

29

30

31

32

33

35

36

37

38

39

40

41

42

28

34

—4—

CXA1870S

Pin Description

No.

1

2

3

4

22

5

Symbol

X'TAL

APC

VCC

V1 IN V2 IN

V HOLD

voltage

2.6 V

5 V

9 V

2 V

0.7 V

Description

Connect a 3.58 MHz crystal oscillator.

APC lag-lead filter CR connection pin.

Power supply pin.

Video switch input pins. Sync tip clamping is performed, so input via capacitors.

Peak hold pin for V sync separation. Connect a capacitor.

500

4k

1

VCC

1.2k 25k

1.2k

2

VCC

150

1k

55k

50k

5

VCC

150

4

22

VCC

Equivalent circuit

—5—

CXA1870S

No.

6

7

8

9

10

Symbol

SW OUT

Y IN

A PED

C IN

V GND

voltage

—

3.5 V

—

Description

Video switch output pin.

Y signal input pin. Input via a capacitor. Standard input level: 2 Vp-p

Auto pedestal (black elongation) black peak hold pin. Connect a capacitor.

Chroma signal input pin. Standard input level (burst level): 570 mVp-p

Video system (Y/C/RGB) GND pin.

2k

30k

12k

25k

500

6

VCC

VCC VCC

50k

1.2k

7

VCC

6k

30k

9

VCC

16k

20k

1.2k

8

VCC

VCC VCC VCC

Equivalent circuit

—6—

CXA1870S

Pin No.

11

12 13 14

15 17 19

16 18 20

Symbol

OSD BLK

OSD R

OSD G

OSD B

R S/H G S/H B S/H

R OUT G OUT B OUT

voltage

—

Description

Blanking signal input pin for OSD RGB input. 0 to 1 V: Blanking not performed. 2 to 3 V: Signal from Y IN/C IN

lowered by –6 dB.

4 to 6 V: R, G and B outputs

become lower than black level.

Digital R, G and B signal input pins for on screen display. 0 to 1 V: No OSD display. 2 to 3 V: OSD level = 46 IRE

(33 IRE)

4 to 6 V: OSD level = 92 IRE

(65 IRE) Figures in parentheses are for when the I2C OSD register is set to 0.

Sample-and-hold pins for R, G and B AKB (Auto Kinetic Bias). Connect to GND via capacitors.

R, G and B output pins.

40k

15k

2k

60k

30k

2k60k

30k

2k

60k

11

30k

2k

VCC

12 13 14

VCC

1.2k

15 17 19

VCC

150

5k

16 18 20

VCC

VCC VCC

Equivalent circuit

—7—

CXA1870S

Pin No.

21

23

24

25

26

Symbol

IK

ABL IN

VD

ABL LPF

V OSC

Description

Inputs the signal obtained by converting the CRT beam current (Ik) into voltage. Connect to an emitter follower via a capacitor.

ABL voltage input pin.

Vertical deflection sawtooth wave output pin.

ABL signal LPF pin. Connect a capacitor.

Connect a capacitor to generate the V sawtooth wave.

150

21

V

CC

VCC

150

10k

30k

23

V

CC

5k

3k

15k

24k

24

VCC

24k

100k

25

VCC

100

26

VCC

voltage

—

Equivalent circuit

—8—

CXA1870S

Pin No.

27

28

29

30

31

32

Symbol

V LPF

V PLS

HD

XRAY

HP

J GND

Description

Connect a capacitor to hold the AGC voltage which maintains the V sawtooth wave at a constant amplitude.

V pulse output pin. A negative polarity pulse 3 to 3.5 H width is output from this pin. High level: 4.5 V Low level: 0 V

H drive output pin. This pin is output at the open collector.

X-ray protection circuit input pin. When a pulse with a width of 7 V or more is input, HD output becomes low and R, G and B outputs are blanked. This status is maintained until the power supply is turned off. Vilmax = 2.4 V Vihmin = 3.0 V

H pulse input pin. Inputs a 3 to 5 Vp-p signal via a capacitor.

Jungle system (H/V) GND pin.

VCC

27

VCC

20k

29

19k

30k

40k

30k

63k

27k

30

VCC

VCC VCC

VCC

10k

60k

V

CC

VCC

31

74k

18k

28

VCC

voltage

5 V

—

3.3 V

(at no

signal)

—

Equivalent circuit

—9—

CXA1870S

Pin No.

33

34

35

36

37 38

Symbol

CERA

AFC

IREF

REG

SCL

SDA

Description

Connect a 32 fh (503.5 kHz) ceramic oscillator.

AFC lag-lead filter CR connection pin.

Connect a 15 kΩ resistor between this pin and GND.

Regulator pin for voltage generated internally from VCC. Connect a capacitor for stabilization.

I2C bus SCL (Serial Clock) and SDA (Serial Data) pins. Vilmax = 1.5 V Vihmin = 3 V Volmax = 0.4 V

VCC

10k

28k

V

CC

VCC

330

33

VCC

40k

1.2k

V

CC

VCC

34

150

20k

35

VCC

1.2k

40k

4p

36

50µA

VCC

4k

37 38

VCC

voltage

2.3 V

3.2 V

2.6 V

7 V

—

Equivalent circuit

—10—

CXA1870S

Pin No.

39

40

41

42

Symbol

H S/S OUT

H SYNC

V SYNC

V BIAS

Description

H sync separation pulse output. A positive polarity pulse is output from this pin. High level: 4.6 V Low level: 0 V

H sync separation input pin. Inputs a 2 Vp-p video signal via a capacitor and resistor.

V sync separation input pin. Inputs a 2 Vp-p video signal via a capacitor and resistor.

The V oscillator reference voltage is output from this pin.

23k

1.2k

39

V

CC

VCC

150

14k

24k

20k

40

10µA

V

CC

VCC

150

10k

26k

31k

10k

20k

41

20µA

30k

4k

20k

42

V

CC

VCC

voltage

—

2.6 V

3.4 V

3.8 V

Equivalent circuit

—11—

CXA1870S

Electrical Characteristics

Setting conditions

• Ta = 25 °C VCC = 9 V

• I2C bus register should be set to “I2C Bus Register Initial Settings”.

Measurement

conditions

Video In: Sig-H2,H3 AFC: 0 Video In: Sig-H6 AFC: 0 Video In: Sig-H7 AFC: 0 Video In: Sig-H6 AFC: 1 Video In: Sig-H7 AFC: 1 Video In: Sig-H6 AFC: 2 Video In: Sig-H7 AFC: 2

Video In: Sig-H1

Video In: Sig-H1 Video In: Sig-Y11

HPHASE: F Video In: Sig-Y11 HPHASE: 7 Video In: Sig-Y11 HPHASE: 0

Video In: Sig-Y11

No.

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16 17

Item

Horizontal free running frequency Horizontal sync pull-in range

AFC gain 1

AFC gain 2

AFC gain 3

HD output pulse width HD output high level HD output low level Horizontal phase operating range 1 Horizontal phase operating range 2 Horizontal phase operating range 3 HP blanking delay time 1

HP blanking delay time 2

HSS OUT high level HSS OUT low level Overvoltage protection circuit VHT

H system items

Symbol

Hfree

∆H

AFCmax

AFCcen

AFCmin

HD, W

HD, H

HD, L

HPHmax

HPHcen

HPHmin

HPBLK1

HPBLK2

HSS, H

HSS, L

XVTH

Measurement method

Check that I2C register HLOCK is 1.

AFCmax=t1-t2

AFCcen=t1-t2

AFCmin=t1-t2

t1: Video In: Time from fall of Sig-H6 to rise of Pin 31.

t2: Video In: Time from fall of Sig-H7 to rise of Pin 31.

Check that HD appears at 2.4 V and disappears at 2.8 V.

Measurement

pin 29

31

29

20 31

39

30

HSS,H

HSS,L

HPBLK1

HPBLK2

Pin 20

Pin 31

HPH

Pin 20

Pin 31

HD,H

HD,L

HD,W

No.

1

Item

Current consumption 1

Symbol

ICC1

Measurement

conditions

Measurement

3

Measurement method

Measure the VCC pin inflow current.

Min.53Typ.80Max.

110

Unit

mA

Min.

15.60

–400

0.12

—

0.75

24

8.7

0.5

–4.3

–1.5

1.3

—

4

0

2.4

Typ.

15.78

—

0.3

0.5

1.2

26

9

0.8

–3.3

–0.5

2.3

100

4.6

0.1

2.6

Max.

15.96

400

0.48

—

1.75

28

—

1.1

–2.3

0.5

3.3

—

5

0.5

2.8

Unit

kHz

µs

V

µs

ns

V

—12—

CXA1870S

V system items

Measurement

conditions

Video In: Sig-V1

V SHIFT: F

V SHIFT: 0

V SHIFT: 1F

V SIZE: 0

V SIZE: 3F

S CORR: 0

S CORR: F

V LIN: 0

V LIN: F

HV COMP: 0, Pin 23: 6 V HV COMP: 7, Pin 23: 6 V HV COMP: 0, Pin 23: 0 V HV COMP: 7, Pin 23: 0 V

Item

VBias

V PLS high level

V PLS low level VD output

center voltage V SHIFT variable range 1 V SHIFT variable range 2 V SIZE variable range 1 V SIZE variable range 2

S CORR variable range 1

S CORR variable range 2

V LIN variable range 1

V LIN variable range 2

V zooming 1

V zooming 2

Symbol

V

Bias

VPLS, H

VPLS, L

VDcen

VSHIFT–

VSHIFT+

VSIZE–

VSIZE+

∆ Sa

∆ Sc

∆ La

∆ Lc

∆VZ1

∆VZ2

Vb

Vb-VDcen

Vc-Va

Vc-Va Vsa=Va

Vsc=Vc Va-Vsa

Vc-Vsc Vla=Va

Vlc=Vc Va-Vla

Vc-Vlc Vsmin=

Vc-Va Vsmax= Vc-Va Vsmin(Vc-Va) Vsmax(Vc-Va)

Measurement

pin 42

28

24

Video In: Sig-V1

Vc

Vb

Va

GND

VTRIG

0.1ms

8.75ms

16.57ms

Pin 24

VPLS, L

VPLS, H

Measurement method

Measure the pin voltage.

No.

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Unit

V

mV

V

mV

Max.

5

0.5

3.05

–115

140

1.2

1.8

85

–15

140

110

15

100

Typ.

3.8

4.5

0.1

2.9

–125

120

1.1

1.65

65

–35

120

90

3

80

Min.

4

0

2.75

–140

110

0.9

1.5

45

–55

90

60

0

60