SN54ABT16843, SN74ABT16843

18-BIT BUS-INTERFACE D-TYPE LATCHES

WITH 3-STATE OUTPUTS

SCBS223E – OCTOBER 1992 – REVISED MAY 1997

6

POST OFFICE BOX 655303

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

temperature (unless otherwise noted) (see Figure 1)

VCC = 5 V,

TA = 25°C

SN54ABT16843

SN74ABT16843

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

CLR low

3.3

3.3

3.3

tw

Pulse duration

PRE low

3.3

3.3

3.3

ns

LE high

3.3

3.3

3.3

t

Setup time data before LE

↓

High

0.9

0.9

0.9

ns

tsu

Setup time, data before LE

↓

Low

0.6

0.6

0.6

ns

th

Hold time data after LE

↓

High

1.7

1.7

1.7

ns

th

Hold time, data after LE

↓

Low

1.8

1.8

1.8

ns

switching characteristics over recommended ranges of supply voltage and operating free-air

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

TA = 25°C

SN54ABT16843

SN74ABT16843

UNIT

(INPUT)

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPLH

D

Q

1.6

3.1

4.2

1.6

5.1

1.6

4.8

ns

tPHL

D

Q

1.6

3.2

4.2

1.6

5

1.6

4.8

ns

tPLH

LE

Q

2.3

4

5

2.3

6.3

2.3

5.9

ns

tPHL

LE

Q

2.5

3.9

4.8

2.5

5.6

2.5

5.3

ns

tPLH

PRE

Q

2.1

4

5.1

2.1

6.3

2.1

6.1

ns

tPHL

PRE

Q

2.2

3.7

4.6

2.2

5.3

2.2

5

ns

tPLH

CLR

Q

1.9

3.7

4.8

1.9

5.7

1.9

5.4

ns

tPHL

CLR

Q

2.2

4.2

5.3

2.2

6.1

2.2

6

ns

tPZH

OE

Q

1.6

3.3

4.3

1.6

5.5

1.6

5.4

ns

tPZL

OE

Q

2

3.2

4.6

2

5.9

2

5.8

ns

tPHZ

OE

Q

1.7

4

5.5

1.7

6.4

1.7

6.3

ns

tPLZ

OE

Q

1.7

3.7

4.4

1.7

5.3

1.7

5.2

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.