SN54AS867, SN54AS869

SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869

SYNCHRONOUS 8-BIT UP/DOWN COUNTERS

SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995

13

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54AS867

SN74AS867

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = –18 mA

–1.2

–1.2

V

VOH

VCC = 4.5 V to 5.5 V,

IOH = – 2 mA

VCC –2

VCC –2

V

VOL

RCO

VCC = 4.5 V

IOL = 20 mA,

VIL on ENT = 0.7 V

0.34

0.5

V

OL

Other outputs

CC

IOL = 20 mA

0.34

0.5

II

VCC = 5.5 V,

VI = 7 V

0.1

0.1

mA

IIH

ENT

VCC =5 5V

VI =2 7V

40

40

µA

IIH

Other inputs

VCC = 5.5 V,

VI = 2.7 V

20

20

µA

IIL

ENT

VCC =5 5V

VI =0 4V

–4

–4

mA

IIL

Other inputs

VCC = 5.5 V,

VI = 0.4 V

–2

–2

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

–30

–112

–30

–112

mA

ICC

VCC = 5.5 V

134

195

134

195

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.

switching characteristics (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

RL = 500 Ω,

TA = MIN to MAX§

UNIT

(INPUT)

(OUTPUT)

SN54AS867

SN74AS867

MIN

MAX

MIN

MAX

fmax*

40

50

MHz

tPLH

CLK

RCO

5

31

5

22

ns

tPHL

CLK

RCO

6

19

6

16

ns

tPLH

CLK

Any Q

3

12

3

11

ns

tPHL

CLK

Any Q

4

16

4

15

ns

tPLH

ENT

RCO

3

19

3

10

ns

tPHL

ENT

RCO

5

21

5

17

ns

tPLH

ENP

RCO

5

16

5

14

ns

tPHL

ENP

RCO

5

21

5

17

ns

tPHL

Clear (S0 or S1 low)

Any Q

7

23

7

21

ns

* On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested.

§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.