SN28835

1/2-INCH NTSC TIMER

SOCS023B – FEBRUARY 1991

6

POST OFFICE BOX 655303

– 0.3 V to 7 V

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300 mW

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–20

°C to 45°C

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–55

°C to 125°C

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Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

260

°C

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† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to GND.

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.5

5

5.5

V

High-level input voltage, VIH

VCC x 0.7

V

Low-level input voltage, VIL

0.8

V

Operating frequency

14.318

MHz

Power-up time

300

µs

Operating free-air temperature, TA

–20

45

°C

electrical characteristics over recommended ranges of supply voltage and operating free-air

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH

GT3/SH2 and GT1/SH3

VCC = 4.5 V,

IOH = – 4 mA

3.5

V

VOH

All other outputs

VCC = 4.5 V,

IOH = – 2 mA

3.5

V

VOL

GT3/SH2 and GT1/SH3

VCC = 4.5 V,

IOL = 4 mA

0.5

V

VOL

All other outputs

VCC = 4.5 V,

IOL = 2 mA

0.5

V

IIH§

VIH = 5 V

1

µA

IIL

VIL = 0

–30

– 200

– 500

µA

ICC(AV)

Average supply current

10

30

mA

ICC(S)

Standby supply current

1

mA

‡ The SB input is a Schmitt-trigger input with 0.1-V to 1-V hysteresis.

§ All inputs except X1 have pullup-current sources.

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

f lk

Frequency

SC, SC(90)

3.579545

MHz

fclock

Frequency

S1, S2, S3, SH1, GT2, GT1/SH3, GT3/SH2

CL =50 pF

4.772727

MHz

t

Pulse duration

SC, SC(90)

CL = 50 pF

140

ns

tw

Pulse duration

S1, S2, S3, SH1, GT2, GT1/SH3, GT3/SH2

70

ns

t

Rise time

GT1SH3 and GT3SH2

10

ns

tr

Rise time

All other outputs

CL =50 pF

50

ns

tf

Fall time

GT1SH3 and GT3SH2

CL = 50 pF

10

ns

tf

Fall time

All other outputs

50

ns