SN54ALS161B, SN54ALS162B, SN54ALS163B, SN54AS161, SN54AS163

SN74ALS161B, SN74ALS163B, SN74AS161, SN74AS163

SYNCHRONOUS 4-BIT DECADE AND BINARY COUNTERS

SDAS276 – DECEMBER 1994

11

POST OFFICE BOX 655303

switching characteristics (see Figure 3)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

TA = MIN to MAX†

UNIT

(INPUT)

(OUTPUT)

SN54AS163

SN74AS163

MIN

MAX

MIN

MAX

fmax*

65

75

MHz

tPLH

RCO (with LOAD high)

1

8.5

1

8

tPLH

CLK

RCO (with LOAD low)

3

17.5

3

16.5

ns

tPHL

RCO

2

14

2

12.5

tPLH

CLK

Any Q

1

7.5

1

7

ns

tPHL

CLK

Any Q

2

14

2

13

ns

tPLH

ENT

RCO

1.5

10

1.5

9

ns

tPHL

ENT

RCO

1

9.5

1

8.5

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.