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Timing Requirements

Switching Characteristics

SN54GTL16612, SN74GTL16612

18-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVERS

SCBS480K – JUNE 1994 – REVISED JULY 2005

over recommended ranges of supply voltage and operating free-air temperature,

V

SN54GTL16612

SN74GTL16612

UNIT

MIN

MAX

MIN

MAX

Clock frequency

95

95

MHz

LEAB or LEBA high

3.3

3.3

Pulse duration

ns

CLKAB or CLKBA high or low

5.6

5.6

A before CLKAB

↑

1.3

1.3

B before CLKBA

↑

3.2

2.3

A before LEAB

↓

1.2

0

Setup time

ns

B before LEBA

↓

1.3

1.3

CEAB before CLKAB

↑

2.1

2

CEBA before CLKBA

↑

2.6

2.2

A after CLKAB

↑

2.9

1.6

B after CLKBA

↑

4.4

0.3

A after LEAB

↓

4.5

4

Hold time

ns

B after LEBA

↓

4.3

3.6

CEAB after CLKAB

↑

2

0.8

CEBA after CLKBA

↑

1.1

1.1

over recommended ranges of supply voltage and operating free-air temperature,

V

SN54GTL16612

SN74GTL16612

FROM

TO

PARAMETER

UNIT

(INPUT)

(OUTPUT)

MAX

MAX

95

95

MHz

1

2.8

4.5

1.5

2.8

4.1

A

B

ns

1

2.5

4.6

1.3

2.5

4.1

1

3.6

5.5

2

3.6

5.3

LEAB

B

ns

1

3.5

6.1

1.9

3.5

5.5

1

3.7

5.5

2.3

3.7

5.3

CLKAB

B

ns

1

3.4

5.6

1.9

3.4

5.5

1

3.4

5.5

2

3.4

5.1

OEAB

B

ns

1

3.3

5.6

2

3.3

5.6

Transition time, B outputs (0.5 V to 1 V)

1.5

1.5

ns

Transition time, B outputs (1 V to 0.5 V)

0.8

0.8

ns

1.9

4

6.9

2

4

6.3

B

A

ns

0.9

2.8

4.9

1.1

2.8

4.4

2

3.7

6.1

2.3

3.7

5.7

LEBA

A

ns

1

3

5.1

1.8

3

4.8

2

3.8

6.4

2.5

3.8

6.1

CLKBA

A

ns

2

3.3

5.6

2.3

3.3

5.2

1

5

7.5

2.3

5

7.4

OEBA

A

ns

2

4.3

6.9

2.5

4.3

6.4

(1)

7