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IDT54FCT2245ATQB

FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

Integrated Device Technology 

IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT

FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

MILITARY AND COMMERCIAL TEMPERATURE RANGES

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

FCT245T

FCT2245T

Com'l.

Mil.

Symbol

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

tPZH

tPZL

tPHZ

tPLZ

Parameter

Propagation Delay

A to B, B to A

Output Enable Time

OE to A or B

Output Disable Time

OE to A or B

Output Enable Time

T/R to A or B(3)

Output Disable Time

T/R to A or B(3)

Conditions(1)

CL = 50 pF

RL = 500Ω

Min.(2) Max. Min.(2) Max.

1.5 7.0 1.5 7.5

1.5 9.5 1.5 10.0

1.5 7.5 1.5 10.0

1.5 9.5 1.5 10.0

1.5 7.5 1.5 10.0

FCT245AT

FCT2245AT

Com'l.

Mil.

Min.(2) Max. Min.(2) Max.

1.5 4.6 1.5 4.9

Unit

ns

1.5 6.2 1.5 6.5 ns

1.5 5.0 1.5 6.0 ns

1.5 6.2 1.5 6.5 ns

1.5 5.0 1.5 6.0 ns

2534 tbl 09

Symbol

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

tPZH

tPZL

tPHZ

tPLZ

Parameter

Propagation Delay

A to B, B to A

Output Enable Time

OE to A or B

Output Disable Time

OE to A or B

Output Enable Time

T/R to A or B(3)

Output Disable Time

T/R to A or B(3)

Conditions(1)

CL = 50 pF

RL = 500Ω

FCT245CT

FCT2245CT

Com'l.

Mil.

Min.(2) Max. Min.(2) Max.

1.5 4.1 1.5 4.5

FCT245DT

Com'l.

Mil.

Min.(2) Max. Min.(2) Max.

1.5 3.8

—

—

Unit

ns

1.5 5.8 1.5 6.2 1.5 5.0

—

— ns

1.5 4.8 1.5 5.2 1.5 4.3

—

— ns

1.5 5.8 1.5 6.2 1.5 5.0

—

— ns

1.5 4.8 1.5 5.2 1.5 4.3

—

— ns

2534 tbl 10

SWITCHING CHARACTERISTICS OVER OPERATING RANGE

FCT640T

FCT640AT

FCT640CT

Com'l.

Mil.

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

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

tPLH Propagation Delay

tPHL A to B, B to A

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

RL = 500Ω

tPZH Output Enable Time

tPZL OE to A or B

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

tPHZ Output Disable Time

tPLZ OE to A or B

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

tPZH Output Enable Time

tPZL T/R to A or B(3)

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

tPHZ Output Disable Time

tPLZ T/R to A or B(3)

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

NOTES:

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.

2534 tbl 11

6.9

5

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