54AC16646, 74AC16646

16BIT BUS TRANSCEIVERS AND REGISTERS

WITH 3STATE OUTPUTS

SCAS241A − MARCH 1990 − REVISED APRIL 1996

7

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

54AC16646

74AC16646

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

3 V

2.9

2.9

2.9

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 = −4 mA

3 V

2.58

2.4

2.48

V

VOH

4.5 V

3.94

3.7

3.8

V

5.5 V

4.94

4.7

4.8

IOH = −50 mA†

5.5 V

3.85

IOH = −75 mA†

5.5 V

3.85

3 V

0.1

0.1

0.1

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 = 12 mA

3 V

0.36

0.5

0.44

V

VOL

4.5 V

0.36

0.5

0.44

V

5.5 V

0.36

0.5

0.44

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‡

VI = 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

Ci

VI = VCC or GND

5 V

4.5

pF

Co

VI = VCC or GND

5 V

16

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.

timing requirements over recommended operating free-air temperature range,

TA = 25°C

54AC16646

74AC16646

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fclock

Clock frequency

0

65

0

65

0

65

MHz

tw

Pulse duration, CLKAB or CLKBA high or low

7

7

7

ns

tsu

Setup time, A before CLKAB

↑ or B before CLKBA↑

6.5

6.5

6.5

ns

th

Hold time, A after CLKAB

↑ or B after CLKBA↑

1

1

1

ns

timing requirements over recommended operating free-air temperature range,

TA = 25°C

54AC16646

74AC16646

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fclock

Clock frequency

0

75

0

75

0

75

MHz

tw

Pulse duration, CLKAB or CLKBA high or low

6.5

6.5

6.5

ns

tsu

Setup time, A before CLKAB

↑ or B before CLKBA↑

5

5

5

ns

th

Hold time, A after CLKAB

↑ or B after CLKBA↑

1

1

1

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.