PI74FCT245ATLE 查看數據表（PDF） - Pericom Semiconductor

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PI74FCT245ATLE

Fast CMOS Octal Bidirectional Transceivers

Pericom Semiconductor 

PI74FCT245T

PI74FCT2245T(25 Ohm Series )

1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122O334455c66t77a8899l00B1122i33d44i55r6677e88c99t00i11o2233n44a5566l77T8899r00a1122n1122s33c44e55i66v7788e99r0011s22

Switching Characteristics over Operating Range

Parameters Description

Conditions(1)

245T/2245T

Com.

Min. Max.

tPLH Propagation Delay

CL = 50 pF

1.5(1) 7.0

tPHL A to B, B to A

RL = 500-ohm

tPZH Output Enable Time(2)

1.5 9.0

tPZL

tPHZ

OE to A or B

Output Disable Time(2)

1.5 7.5

tPLZ

tPZH

OE to A or B

Output Enable Time(2)

1.5 9.0

tPZL

tPHZ

T/R to A or B

Output Disable Time(2)

1.5 7.5

tPLZ T/R to A or B

Notes:

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

2. This parameter is guaranteed but not production tested.

245AT/2245AT 245CT/2245CT

Com.

Com.

Min. Max. Min. Max.

1.5(1) 4.6 1.5(1) 4.1

1.5 6.2 1.5 5.8

1.5 5.0 1.5 4.8

1.5 6.2 1.5 5.8

1.5 5.0 1.5 4.8

245DT

Com.

Min Max. Unit

1.5(1) 3.8 ns

1.5 5.0 ns

1.5 4.3 ns

1.5 5.0 ns

1.5 4.3 ns

Packaging Mechanical: 20-pin SOIC (S)

20

1

.496 12.60

.511 12.99

.020

.030

0.508

0.762

REF

.2914 7.40

.2992 7.60

0-8˚

.0926 2.35

.1043 2.65

SEATING

PLANE

.010

.029

0.254

0.737

x 45˚

0.41 .016

1.27 .050

.394

.419

10.00

10.65

.0091 0.23

.0125 0.32

.050

BSC

1.27

.013

.020

0.33

0.51

.0040 0.10

.0118 0.30

X.XX DENOTES CONTROLLING

X.XX DIMENSIONS IN MILLIMETERS

06-0207

4

PS2012E 08/08/06

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