SN28835

1/2-INCH NTSC TIMER

SOCS023B – FEBRUARY 1991

13

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

Refresh Pulses

PD

ABIN

GT

S1, S2, S3

PS,T

244 Pulses

1024 Pulses

(see Note B)

PI

SB

See Note C

Standby Operation

ABIN

GT

S1, S2, S3

PS,T

244 Pulses

1024 Pulses

PI

PD

SB

(see

Note A)

Power

Power-Up Operation

VD (see

Note B)

VD (see

Note D)

GPS

GP

GPS

Refresh Pulses

(see Note B)

GP

Figure 9. Power-Up and Standby Timing

NOTES: A. A 0.1-

µF capacitor is connected between SB and GND.

B. In both powerup and standby operation, 1024 refresh pulses are generated on PI, PS, and T even if VD is not connected internally

to GP.

C. When SB is low, ABIN, GT, PD, PI, PS, S1, S2, S3, and T are all low.

D. VD is connected internally to GP (GPS is high).