CDC339

CLOCK DRIVER

WITH 3-STATE OUTPUTS

SCAS331 – DECEMBER 1992 – REVISED MARCH 1994

3

POST OFFICE BOX 655303

recommended operating conditions (see Note 3)

MIN

MAX

UNIT

VCC

Supply voltage

4.75

5.25

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VI

Input voltage

0

VCC

V

IOH

High-level output current

–48

mA

IOL

Low-level output current

48

mA

fclock

Input clock frequency

80

MHz

TA

Operating free-air temperature

–40

85

°C

NOTE 3: Unused pins (input or I/O) must be held high or low.

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.75 V,

II = –18 mA

–1.2

V

VOH

VCC = 4.75 V,

IOH = – 48 mA

2

V

VOL

VCC = 4.75 V,

IOL = 48 mA

0.5

V

IIH

VCC = 5.25 V,

VI = 2.7 V

50

µA

IIL

VCC = 5.25 V,

VI = 0.5 V

–50

µA

IOZ

VCC = 5.25 V,

VO = 2.7 V or 0.5 V

±50

µA

IO‡

VCC = 5.25 V,

VO = 2.5 V

–50

– 180

mA

V

5 25 V

I

0

Outputs high

70

ICC

VCC = 5.25 V,

IO = 0,

VI =VCC or GND

Outputs low

85

mA

VI = VCC or GND

Outputs disabled

70

Ci

VI = 2.5 V or 0.5 V

3

pF

Co

VO = 2.5 V or 0.5 V

8

pF

† All typical values are at VCC = 5 V, TA = 25°C.

‡ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.

timing requirements over recommended ranges of supply voltage and operating free-air

temperature

MIN

MAX

UNIT

fclock

Clock frequency

80

MHz

CLR low

4

tw

Pulse duration

CLK low

4

ns

CLK high

4

tsu

Setup time

CLR inactive before CLK

↑

2

ns

Clock duty cycle

40%

60%