TMS3471C

2/3-INCH NTSC TIMER

SOCS028B – AUGUST 1991

13

POST OFFICE BOX 655303

Refresh Pulses

PD

ABIN

GT

S1, S2,3

PS, T

244 Pulses

(see Note C)

PI

SB

See Note D

Standby Operation

ABIN

GT

S1, S2,3

PS, T

244 Pulses

256 Pulses

PI

PD

SB (see

Note A)

Power

Power-Up Operation

VD (see

Note B)

VD (see

Note B)

GP

Refresh Pulses

(see Note C)

GP

244

256

0.5 H

6.5 H

256 Pulses

256

0.5 H

244

NOTES: A. A 0.1-

µF capacitor is connected between SB and GND.

B. The VD output is fed back to GP.

C. The 256 CCD refresh pulses are generated on PI, PS, and T even if VD is not fed back to GP.

D. When SB is low, PI, PS, T, S1, S2,3, GT, and PD are all low and ABIN is high.

Figure 7. Power-Up and Standby Timing