SN74FB2040

8-BIT TTL/BTL TRANSCEIVER

SCBS173N – NOVEMBER 1991 – REVISED MARCH 2002

5

POST OFFICE BOX 655303

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (see Figure 1)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

TA = 25°C

MIN

MAX

UNIT

(INPUT)

(OUTPUT)

MIN

TYP

MAX

tPLH

AI

B

3.2

4.5

6

2.4

6.5

ns

tPHL

AI

B

2.8

4.2

5.6

2.7

5.8

ns

tPLH

B

AO

2.3

3.8

5.7

1.9

6.2

ns

tPHL

B

AO

2.3

4.2

5.9

2

8.2

ns

tPLH

OEB

B

3.7

5.1

6.7

3

7

ns

tPHL

OEB

B

3.1

4.6

5.9

3

6.1

ns

tPLH

OEB

B

3.6

5.2

6.8

3.3

7

ns

tPHL

OEB

B

2.9

4.4

5.9

2.6

6.1

ns

tPZH

OEA

AO

2.5

4

5.5

2.1

5.8

ns

tPZL

OEA

AO

2.1

3.6

4.8

2

5

ns

tPHZ

OEA

AO

2.3

4.1

5.9

1.9

6.5

ns

tPLZ

OEA

AO

1.6

3.1

4.5

1.4

4.7

ns

tsk(p)

Skew for any single channel

tPHL – tPLH, AI to B or B to AO

0.5

ns

tsk(o)

Skew between drivers in the same package, AI to B or B to AO

0.4

ns

tr

Rise time, 1.3 V to 1.8 V, B port

2

2.8

3.8

1.7

ns

tf

Fall time, 1.8 V to 1.3 V, B port

1

1.9

3

1

4.2

ns

t(pr)

B-port input pulse rejection

1

3.4

ns