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Timing Requirements

Switching Characteristics

SN54GTL16612A, SN74GTL16612A

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

SCES187D – JANUARY 1999 – REVISED JULY 2005

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

otherwise noted) (see Figure 2)

SN74GTL16612A

UNIT

MIN

MAX

MIN

MAX

Clock frequency

85

85

MHz

LEAB or LEBA high

3.3

3.3

Pulse duration

ns

CLKAB or CLKBA high or low

5.7

5.7

A before CLKAB

↑

1

1

B before CLKBA

↑

2.7

1.8

A before LEAB

↓

1.7

0.5

Setup time

ns

B before LEBA

↓

1.2

1.2

CEAB before CLKAB

↑

1.3

1.2

CEBA before CLKBA

↑

1.8

1.4

A after CLKAB

↑

3.2

1.9

B after CLKBA

↑

4.3

0.5

A after LEAB

↓

3.2

2.7

Hold time

ns

B after LEBA

↓

4.2

3.5

CEAB after CLKAB

↑

2.4

1.2

CEBA after CLKBA

↑

1.1

1.1

(1)

Product preview

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

(see Figure 2)

SN74GTL16612A

FROM

TO

PARAMETER

UNIT

(INPUT)

(OUTPUT)

MAX

MAX

85

85

MHz

2

7.3

2.5

6.9

A

B

ns

2.2

7.4

2.5

6.9

2.2

7.5

3.2

7.3

LEAB

B

ns

2.3

7.9

3.2

7.3

2.1

8

3.4

7.8

CLKAB

B

ns

2.5

7.9

3.4

7.8

1.8

7.4

2.8

7

OEAB

B

ns

1.8

7

2.8

7

Transition time, B outputs (20% to 80%)

2.6

2.6

ns

Transition time, B outputs (80% to 20%)

2.6

2.6

ns

1.4

6.3

1.5

5.7

B

A

ns

1.3

6.2

1.5

5.7

1.5

6.1

1.8

5.7

LEBA

A

ns

1

6

1.8

5.7

1.8

5.8

2.3

5.5

CLKBA

A

ns

2

5.9

2.3

5.5

0.5

6.2

1.8

6.1

OEBA

A

ns

1.3

6.6

1.8

6.1

(1)

Product preview

(2)

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