54ACT11821, 74ACT11821

10BIT BUSINTERFACE FLIPFLOPS

WITH 3STATE OUTPUTS

SCAS156A − NOVEMBER 1990 − REVISED APRIL 1993

POST OFFICE BOX 655303

POST OFFICE BOX 1443

2−4

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

54ACT11821

74ACT11821

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

IOH = − 50 A

4.5 V

4.4

4.4

4.4

IOH = − 50 µA

5.5 V

5.4

5.4

5.4

VOH

IOH = − 24 mA

4.5 V

3.94

3.7

3.8

V

VOH

IOH = − 24 mA

5.5 V

4.94

4.7

4.8

V

IOH = − 50 mA†

5.5 V

3.85

IOH = − 75 mA†

5.5 V

3.85

IOL = 50 A

4.5 V

0.1

0.1

0.1

IOL = 50 µA

5.5 V

0.1

0.1

0.1

VOL

IOL = 24 mA

4.5 V

0.36

0.5

0.44

V

VOL

IOL = 24 mA

5.5 V

0.36

0.5

0.44

V

IOL = 50 mA†

5.5 V

1.65

IOL = 75 mA†

5.5 V

1.65

II

VI = VCC or GND

5.5 V

±0.1

±1

±1

µA

IOZ

VO = VCC or GND

5.5 V

±0.5

±10

±5

µA

ICC

VI = VCC or GND,

IO = 0

5.5 V

8

160

80

µA

∆ICC‡

One input at 3.4 V,

Other inputs at VCC or GND

5.5 V

0.9

1

1

mA

Ci

VI = VCC or GND

5 V

4.5

pF

Co

VO = VCC or GND

5 V

12

pF

† Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.

‡ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.

(unless otherwise noted) (see Figure 1)

TA = 25°C

54ACT11821

74ACT11821

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fclock

Clock frequency

0

125

0

125

0

125

MHz

tw

Pulse duration, CLK high or low

4

4

4

ns

tsu

Setup time, data before CLK

↑

2.5

2.5

2.5

ns

th

Hold time, data after CLK

↑

1.5

1.5

1.5

ns

switching characteristics over recommended operating free-air temperature range,

PARAMETER

FROM

TO

TA = 25°C

54ACT11821

74ACT11821

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

fmax

125

125

125

MHz

tPLH

CLK

Any Q

4.7

7.6

10.4

4.7

12.6

4.7

11.7

ns

tPHL

CLK

Any Q

5

8.1

11

5

12.9

5

12.1

ns

tPZH

OE

Any Q

3.1

6.1

9.1

3.1

10.8

3.1

10

ns

tPZL

OE

Any Q

4.1

7.6

11

4.1

13.2

4.1

12.3

ns

tPHZ

OE

Any Q

4.8

7.2

9.2

4.8

10.6

4.8

10.1

ns

tPLZ

OE

Any Q

4.8

6.8

8.6

4.8

9.8

4.8

9.4

ns

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.