TMC3003

PRODUCT SPECIFICATION

4

REV. 1.0.3 3/5/01

Pin Descriptions

Pin Name

Pin Number

Value

Description

PLCC

LQFP

Clock and Pixel I/O

CLK

29

26

TTL

Clock. The clock input is TTL-compatible and all pixel data

is registered on the rising edge of CLK. It is recommended

that CLK be driven by a dedicated TTL buffer to avoid

reflection induced jitter, overshoot, and undershoot.

5, 4, 3, 2, 1,

44, 43, 42,

41, 40

47, 46, 45,

44, 43, 42,

41, 40, 39,

38, 37

TTL

Red pixel data inputs. The Red digital input is TTL-

compatible and registered on the rising edge of CLK.

15, 14, 13,

12, 11, 10, 9,

8, 7, 6

48, 9, 8, 7, 6,

5, 4, 3, 2, 1

TTL

Green pixel data inputs. The Green digital input is TTL-

compatible and registered on the rising edge of CLK.

28, 27, 26,

25, 24, 23,

22, 21, 20,

19

23, 22, 21,

20, 19, 18,

17, 16, 15,

14

TTL

Blue pixel data inputs. The Blue digital input is TTL-

compatible and registered on the rising edge of CLK.

Controls

SYNC

17

11

TTL

Sync pulse Input. Bringing SYNC LOW, turns off a 40

IRE (7.62 mA) current source which forms a sync pulse on

the Green D/A converter output. SYNC is registered on the

rising edge of CLK along with pixel data and has the same

pipeline latency as BLANK and pixel data. SYNC does not

override any other data and should be used only during

the blanking interval.

Since this is a single-supply D/A and all signals are

positive-going, sync is added to the bottom of the Green

D/A range. So turning SYNC OFF means turning the

current source ON. When a sync pulse is desired, the

current source is turned OFF. If the system does not

require sync pulses from the Green D/A converter, SYNC

should be connected to GND.

BLANK

16

10

TTL

Blanking Input. When BLANK is LOW, pixel inputs are

ignored and the D/A converter outputs are driven to the

blanking level. BLANK is registered on the rising edge of

CLK and has the same pipeline latency as SYNC.

Video Outputs

36

33

0.714 Vp-p

Red D/A output. The current source outputs of the D/A

converters are capable of driving RS-343A/SMPTE-170M

compatible levels into doubly-terminated 75 Ohm lines.

35

32

1 V p-p

Green D/A output. The current source outputs of the D/A

converters are capable of driving RS-343A/SMPTE-170M

compatible levels into doubly-terminated 75 Ohm lines.

Sync pulses may be added to the Green D/A output.

32

29

0.714 Vp-p

Blue D/A output. The current source outputs of the D/A

converters are capable of driving RS-343A/SMPTE-170M

compatible levels into doubly-terminated 75 Ohm lines.