IDT74FCT640CD datasheet(5/7 Pages) IDT

Part #	IDT74FCT640CD

Description	FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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5 / 7 page

7.9

5

IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C

FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

MILITARY AND COMMERCIAL TEMPERATURE RANGES

tPLH

Propagation Delay

CL = 50 pF

1.5

7.0

1.5

7.5

1.5

4.6

1.5

4.9

1.5

4.1

1.5

4.5

ns

tPHL

A to B, B to A

RL = 500

Ω

tPZH

Output Enable Time

1.5

9.5

1.5

10.0

1.5

6.2

1.5

6.5

1.5

5.8

1.5

6.2

ns

tPZL

OE to A or B

tPHZ

Output Disable Time

1.5

7.5

1.5

10.0

1.5

5.0

1.5

6.0

1.5

4.8

1.5

5.2

ns

tPLZ

OE to A or B

tPZH

Output EnableTime

1.5

9.5

1.5

10.0

1.5

6.2

1.5

6.5

1.5

5.8

1.5

6.2

ns

tPZL

T/

R to A or B(3)

tPHZ

Output Disable Time

1.5

7.5

1.5

10.0

1.5

5.0

1.5

6.0

1.5

4.8

1.5

5.2

ns

tPLZ

T/

R to A or B(3)

2534 tbl 07

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT245/A/C

54/74FCT245

54/74FCT245A

54/74FCT245C

Com’l.

Mil.

Com’l.

Mil.

Com’l.

Mil.

Symbol

Parameter

Condition

(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit

tPLH

Propagation Delay

CL = 50 pF

2.0

7.0

2.0

8.0

1.5

5.0

1.5

5.3

1.5

4.4

1.5

4.7

ns

tPHL

A to B, B to A

RL = 500

Ω

tPZH

Output Enable Time

2.0

13.0

2.0

16.0

1.5

6.2

1.5

6.5

1.5

5.8

1.5

6.2

ns

tPZL

OE to A or B

tPHZ

Output Disable Time

2.0

10.0

2.0

12.0

1.5

5.0

1.5

6.0

1.5

4.8

1.5

5.2

ns

tPLZ

OE to A or B

tPZH

Output Enable Time

2.0

13.0

2.0

16.0

1.5

6.2

1.5

6.5

1.5

5.8

1.5

6.2

ns

tPZL

T/

R to A or B(3)

tPHZ

Output Disable Time

2.0

10.0

2.0

12.0

1.5

5.0

1.5

6.0

1.5

4.8

1.5

5.2

ns

tPLZ

T/

R to A or B(3)

2534 tbl 08

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT640/A/C

54/74FCT640

54/74FCT640A

54/74FCT640C

Com’l.

Mil.

Com’l.

Mil.

Com’l.

Mil.

Symbol

Parameter

Condition

(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT645/A/C

54/74FCT645

54/74FCT645A

54/74FCT645C

Com’l.

Mil.

Com’l.

Mil.

Com’l.

Mil.

Symbol

Parameter

Condition

(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit

tPLH

Propagation Delay

CL = 50 pF

1.5

9.5

1.5

11.0

1.5

4.6

1.5

4.9

1.5

4.1

1.5

4.5

ns

tPHL

A to B, B to A

RL = 500

Ω

tPZH

Output Enable Time

1.5

11.0

1.5

12.0

1.5

6.2

1.5

6.5

1.5

5.8

1.5

6.2

ns

tPZL

OE to A or B

tPHZ

Output Disable Time

1.5

12.0

1.5

13.0

1.5

5.0

1.5

6.0

1.5

4.8

1.5

5.2

ns

tPLZ

OE to A or B

tPZH

Output Enable Time

1.5

11.0

1.5

12.0

1.5

6.2

1.5

6.5

1.5

5.8

1.5

6.2

ns

tPZL

T/

R to A or B(3)

tPHZ

Output Disable Time

1.5

12.0

1.5

13.0

1.5

5.0

1.5

6.0

1.5

4.8

1.5

5.2

ns

tPLZ

T/

R to A or B(3)

NOTES:

2534 tbl 09

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

3. This parameter is guaranteed but not tested.

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