54ACT16474, 74ACT16474

18BIT REGISTERED BUS TRANSCEIVERS

WITH 3STATE OUTPUTS

SCAS238A − MAY 1992 − REVISED APRIL 1996

5

POST OFFICE BOX 655303

POST OFFICE BOX 1443

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

54ACT16474

74ACT16474

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

3.8

3.8

V

VOH

IOH = −24 mA

5.5 V

4.94

4.8

4.8

V

IOH = −75 mA†

5.5 V

3.85

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

0.44

0.44

V

VOL

IOL = 24 mA

5.5 V

0.36

0.44

0.44

V

IOL = 75 mA†

5.5 V

1.65

1.65

II

Control inputs

VI = VCC or GND

5.5 V

±0.1

±1

±1

µA

IOZ‡

A or B ports

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

Control inputs

VI = VCC or GND

5 V

3

pF

Cio

A or B ports

VO = VCC or GND

5 V

11.5

pF

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

‡ For I/O ports, the parameter IOZ includes the input leakage current.

§ 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

54ACT16474

74ACT16474

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fclock

Clock frequency

0

75

0

75

0

75

MHz

tw

Pulse duration

CLK high

4

4

4

ns

tw

Pulse duration

CLK low

6.6

6.6

6.6

ns

tsu

Setup time

Data before CLK

↑

5.5

5.5

5.5

ns

th

Hold time

Data after CLK

↑

1

1

1

ns

switching characteristics over recommended operating free-air temperature range,

PARAMETER

FROM

TO

TA = 25°C

54ACT16474

74ACT16474

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

fmax

75

75

75

MHz

tPLH

CLK

A or B

4

8

10.2

4

11.5

4

11.5

ns

tPHL

CLK

A or B

4.2

8

10.2

4.2

11.4

4.2

11.4

ns

tPZH

OE

A or B

3

7.8

10.3

3

11.7

3

11.7

ns

tPZL

OE

A or B

3.7

9.2

11.6

3.7

13.1

3.7

13.1

ns

tPHZ

OE

A or B

4.8

7.1

8.8

4.8

9.5

4.8

9.5

ns

tPLZ

OE

A or B

4.4

6.6

8.4

4.4

9

4.4

9

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.