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Timing Requirements

Switching Characteristics

Switching Characteristics

SN54LVC646A, SN74LVC646A

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCAS302J – JANUARY 1993 – REVISED AUGUST 2005

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2)

SN74LVC646A

VCC = 1.8 V

VCC = 2.5 V

VCC = 3.3 V

VCC = 2.7 V

UNIT

± 0.18 V

± 0.2 V

± 0.3 V

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

fclock

Clock frequency

(1)

(1)

150

150

MHz

tw

Pulse duration

(1)

(1)

3.3

3.3

ns

tsu

Setup time, data before CLK

↑

(1)

(1)

1.6

1.5

ns

th

Hold time, data after CLK

↑

(1)

(1)

1.7

1.7

ns

(1)

This information was not available at the time of publication.

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2)

SN54LVC646A

FROM

TO

VCC = 3.3 V

PARAMETER

VCC = 2.7 V

UNIT

(INPUT)

(OUTPUT)

± 0.3 V

MIN

MAX

MIN

MAX

fmax

150

150

MHz

A or B

B or A

7.9

1

7.4

tpd

CLK

8.8

1

8.4

ns

A or B

SBA or SAB

9.9

1

8.6

ten

OE

A

10.2

1

8.2

ns

tdis

OE

A

8.9

1

7.5

ns

ten

DIR

B

10.4

1

8.3

ns

tdis

DIR

B

8.7

1

7.9

ns

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2)

SN74LVC646A

FROM

TO

VCC = 1.8 V

VCC = 2.5 V

VCC = 3.3 V

PARAMETER

VCC = 2.7 V

UNIT

(INPUT)

(OUTPUT)

± 0.15 V

± 0.2 V

± 0.3 V

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

fmax

(1)

(1)

150

150

MHz

A or B

B or A

(1)

(1)

(1)

(1)

7.9

1

7.4

tpd

CLK

(1)

(1)

(1)

(1)

8.8

1

8.4

ns

A or B

SBA or SAB

(1)

(1)

(1)

(1)

9.9

1

8.6

ten

OE

A

(1)

(1)

(1)

(1)

10.2

1

8.2

ns

tdis

OE

A

(1)

(1)

(1)

(1)

8.9

1

7.5

ns

ten

DIR

B

(1)

(1)

(1)

(1)

10.4

1

8.3

ns

tdis

DIR

B

(1)

(1)

(1)

(1)

8.7

1

7.9

ns

(1)

This information was not available at the time of publication.

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