54ACT16841, 74ACT16841

20-BIT BUS-INTERFACE D-TYPE LATCHES

WITH 3-STATE OUTPUTS

SCAS174A – MAY 1991 – REVISED APRIL 1996

4

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

54ACT16841

74ACT16841

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

IOH =50 µA

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

3.8

3.8

V

IOH = –24 mA

5.5 V

4.94

4.8

4.8

IOH = –75 mA†

5.5 V

3.85

3.85

IOL =50 µA

4.5 V

0.1

0.1

0.1

IOL = 50 µA

5.5 V

0.1

0.1

0.1

VOL

IOL =24mA

4.5 V

0.36

0.44

0.44

V

IOL = 24 mA

5.5 V

0.36

0.44

0.44

IOL = 75 mA†

5.5 V

1.65

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

±5

±5

µA

ICC

VI = VCC or GND,

IO = 0

5.5 V

8

80

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

3

pF

Co

VO = VCC or GND

5 V

11

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.

timing requirements over recommended operating free-air temperature range,

TA = 25°C

54ACT16841

74ACT16841

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tw

Pulse duration, LE high

4

4

4

ns

tsu

Setup time, data before LE

↓

1.5

1.5

1.5

ns

th

Hold time data after LE

↓

High

3

3

3

ns

th

Hold time, data after LE

↓

Low

4.5

4.5

4.5

ns

switching characteristics over recommended operating free-air temperature range,

PARAMETER

FROM

TO

TA = 25°C

54ACT16841

74ACT16841

UNIT

PARAMETER

(INPUT)

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

D

Q

4

7.1

10.3

4

11.8

4

11.8

ns

tPHL

D

Q

3.2

6.9

11

3.2

12.2

3.2

12.2

ns

tPLH

LE

Q

4.5

7.7

11.3

4.5

12.7

4.5

12.7

ns

tPHL

LE

Q

4.3

7.8

11.4

4.3

12.7

4.3

12.7

ns

tPZH

OE

Q

3.1

6.4

10.1

3.1

11.3

3.1

11.3

ns

tPZL

OE

Q

3.8

7.6

12.1

3.8

13.7

3.8

13.7

ns

tPHZ

OE

Q

4

7.3

9.5

4

10.2

4

10.2

ns

tPLZ

OE

Q

4

6.8

8.9

4

9.6

4

9.6

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.