SN74VMEH22501AEP

8BIT UNIVERSAL BUS TRANSCEIVER AND TWO 1BIT BUS TRANSCEIVERS

WITH SPLIT LVTTL PORT, FEEDBACK PATH, AND 3STATE OUTPUTS

SCES625 − FEBRUARY 2005

10

POST OFFICE BOX 655303

switching characteristics over recommended operating conditions for UBT transceiver (unless

otherwise noted) (see Figures 1 and 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

MIN

TYP

MAX

UNIT

fmax

120

MHz

tPLH

3A

3B

4.8

9.5

ns

tPHL

3A

3B

4.5

8.3

ns

tPLH

LE

3B

5.2

10.6

ns

tPHL

LE

3B

4.7

8.7

ns

tPLH

CLKAB

3B

5.4

10.5

ns

tPHL

CLKAB

3B

4.2

8.4

ns

tPZH

OE

3B

4.2

9.3

ns

tPZL

OE

3B

2.8

8.5

ns

tPHZ

OE

3B

4.2

9.3

ns

tPLZ

OE

3B

2.4

5.7

ns

tr

Transition time, B port (10%−90%)

4.3

ns

tf

Transition time, B port (90%−10%)

4.3

ns

tPLH

3B

3A

1.5

5.9

ns

tPHL

3B

3A

1.7

5.9

ns

tPLH

LE

3A

1.7

5.9

ns

tPHL

LE

3A

1.7

5.9

ns

tPLH

CLKBA

3A

1.1

5.5

ns

tPHL

CLKBA

3A

1.4

5.5

ns

tPZH

OE

3A

1.5

6.2

ns

tPZL

OE

3A

2.1

5.5

ns

tPHZ

OE

3A

0.8

6.2

ns

tPLZ

OE

3A

2.3

5.6

ns

recommended ranges of supply voltage and operating free-air temperature (see Figures 1 and 2)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

MIN

MAX

UNIT

tsk(LH)

1A or 2A

1B or 2B

0.8

ns

tsk(HL)

1A or 2A

1B or 2B

0.7

ns

tsk(LH)

1B or 2B

1Y or 2Y

0.7

ns

tsk(HL)

1B or 2B

1Y or 2Y

0.7

ns

tsk(t)†

1A or 2A

1B or 2B

3.9

ns

tsk(t)†

1B or 2B

1Y or 2Y

1.5

ns

tsk(pp)

1A or 2A

1B or 2B

3.6

ns

tsk(pp)

1B or 2B

1Y or 2Y

1.4

ns

† tsk(t) − Output-to-output skew is defined as the absolute value of the difference between the actual propagation delay for all outputs of the same

packaged device. The specifications are given for specific worst-case VCC and temperature and apply to any outputs switching in opposite directions,

both low to high (LH) and high to low (HL) [tsk(t)].