SN54AS823A, SN74AS823A, SN74AS824A

9-BIT BUS-INTERFACE FLIP-FLOPS

WITH 3-STATE OUTPUTS

SDAS231A – JUNE 1984 – REVISED AUGUST 1995

5

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54AS823A

SN74AS823A

SN74AS824A

UNIT

MIN

TYP†

MAX

MIN

TYP†

MAX

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

– 1.2

V

VCC = 4.5 V to 5.5 V,

IOH = – 2 mA

VCC –2

VCC –2

VOH

VCC =4 5V

IOH = – 15 mA

2.4

3.2

2.4

3.2

V

VCC = 4.5 V

IOH = – 24 mA

2

2

VOL

VCC =4 5V

IOL = 32 mA

0.3

0.5

V

VOL

VCC = 4.5 V

IOL = 48 mA

0.35

0.5

V

IOZH

VCC = 5.5 V,

VO = 2.7 V

50

50

µA

IOZL

VCC = 5.5 V,

VI = 0.4 V

–50

–50

µA

II

VCC = 5.5 V,

VI = 7 V

0.1

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

20

µA

IIL

VCC = 5.5 V,

VI = 0.4 V

– 0.5

– 0.5

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

–30

–112

–30

–112

mA

SN54AS823A

Outputs high

49

80

49

80

SN54AS823A,

SN74AS823A

VCC = 5.5 V

Outputs low

61

100

61

100

ICC

SN74AS823A

Outputs disabled

64

103

64

103

mA

ICC

Outputs high

49

80

49

80

mA

SN74AS824A

VCC = 5.5 V

Outputs low

61

100

61

100

Outputs disabled

64

103

64

103

† 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,

R1 = 500

R2 = 500

TA = MIN to MAX§

UNIT

(INPUT)

(OUTPUT)

SN54AS823A

SN74AS823A

SN74AS824A

MIN

MAX

MIN

MAX

tPLH

CLK

An Q

3.5

9

3.5

7.5

ns

tPHL

CLK

Any Q

3.5

14

3.5

13

ns

tPHL

CLR

Any Q

3.5

16.5

3.5

15.5

ns

tPZH

OE

An Q

4

12

4

11

ns

tPZL

OE

Any Q

4

13

4

12

ns

tPHZ

OE

Any Q

1

10

1

8

ns

tPLZ

OE

Any Q

1

10

1.5

8

ns

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