54ACT16544, 74ACT16544

16-BIT REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCAS161A – AUGUST 1990 – REVISED APRIL 1996

6

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

54ACT16544

74ACT16544

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

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

4.5

pF

Cio

A or B ports

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.

‡ 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

54ACT16544

74ACT16544

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tw

Pulse duration

LEAB or LEBA low

5.5

5.5

5.5

ns

t

Setup time

Data before LEAB or LEBA

↑

1.5

1.5

1.5

ns

tsu

Setup time

Data before CEAB or CEBA

↑

1.5

1.5

1.5

ns

th

Hold time

Data after LEAB or LEBA

↑

3

3

3

ns

th

Hold time

Data after CEAB or CEBA

↑

3

3

3

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.