SN54AS867, SN54AS869

SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869

SYNCHRONOUS 8-BIT UP/DOWN COUNTERS

SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995

8

POST OFFICE BOX 655303

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range

– 65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† 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.

recommended operating conditions

SN74ALS867A

UNIT

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

– 0.4

mA

IOL

Low-level output current

8

mA

fclock

Clock frequency

0

35

MHz

tw(clock)

Pulse duration, CLK high or low

14

ns

tw(clear)

Pulse duration of clear pulse, S0 and S1 low

10

ns

Data inputs A – H

10

ENP or ENT

15

tsu

Setup time before CLK

↑

S0 low and S1 high (load)

12

ns

S0 high and S1 low (count down)

12

S0 and S1 high (count up)

12

th

Hold time after CLK

↑

S0 high after S1

↑ or S1 high after S0↑

3

ns

th

Hold time after CLK

↑

Data inputs A – H

0

ns

TA

Operating free-air temperature

0

70

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN74ALS867A

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

VIK

VCC = 4.5 V,

II = –18 mA

–1.2

V

VOH

VCC = 4.5 V to 5.5 V,

IOH = – 0.4 mA

VCC –2

V

VOL

VCC =4 5V

IOL = 4 mA

0.25

0.4

V

VOL

VCC = 4.5 V

IOL = 8 mA

0.35

0.5

V

II

VCC = 5.5 V,

VI = 7 V

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIL

VCC = 5.5 V,

VI = 0.4 V

– 0.2

mA

IO§

VCC = 5.5 V,

VO = 2.25 V

–30

–112

mA

ICC

VCC = 5.5 V

28

45

mA

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

§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.