SN74F193A

SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER

WITH DUAL CLOCK AND CLEAR

SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993

2–6

POST OFFICE BOX 655303

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

temperature (unless otherwise noted)

VCC = 5 V,

TA = 25°C

VCC = 4.5 V to 5.5 V,

TA = MIN to MAX†

UNIT

MIN

MAX

MIN

MAX

fclock

Clock frequency

0

85

0

85

MHz

CLR high

4

4

t

Pulse duration

LOAD low

5.5

5.5

ns

tw

Pulse duration

UP or DOWN high

4

4

ns

UP or DOWN low

6

6

Data before LOAD inactive

3.5

3.5

tsu

Setup time

CLR inactive before UP

↑ or DOWN↑

5

5

ns

LOAD inactive before UP

↑ or DOWN↑

7.5

7.5

th

Hold time

Data after LOAD inactive

2.5

2.5

ns

switching characteristics (see Note 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

CL = 50 pF,

RL = 500 Ω,

TA = 25°C

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

RL = 500 Ω,

TA = MIN to MAX†

UNIT

MIN

TYP

MAX

MIN

MAX

fmax

85

100

85

MHz

tPLH

UP or DOWN

CO or BO

2.5

8.5

2.5

9

ns

tPHL

UP or DOWN

CO or BO

3

8

3

9

ns

tPLH

UP or DOWN

Any Q

2.5

8.5

2.5

9

ns

tPHL

UP or DOWN

Any Q

5

12

5

13

ns

tPLH

ABCor D

Any Q

2

7

1.5

8

ns

tPHL

A, B, C, or D

Any Q

6

13.5

5

15

ns

tPLH

LOAD

Any Q

4.5

10

4

11

ns

tPHL

LOAD

Any Q

5.5

12

5

13

ns

tPHL

CLR

Any Q

5

11

5

12

ns

tPLH

CLR

CO

6

12

5.5

13

ns

tPHL

CLR

BO

5

11

5

12

ns

tPLH

LOAD

CO or BO

6

13.5

6

15

ns

tPHL

LOAD

CO or BO

6

12.6

6

13.8

ns

tPLH

ABCor D

CO or BO

5.5

13

5

14

ns

tPHL

A, B, C, or D

CO or BO

4.5

12.5

4.5

13.5

ns

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

NOTE 2: Load circuits and waveforms are shown in Section 1.