PI74FCT2646T 查看數據表（PDF） - Pericom Semiconductor

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PI74FCT2646T

Fast CMOS Octal Bidirectional Transceivers

Pericom Semiconductor 

PI74FCT646/648/651/652T

(25Ω Series) P174FCT2646T/2652T

1234567890123456789012345678901212345678901234567890123456789012123456789012345678O90C123T45A67L890R12E12G345I6S78T90E12R34E56D789T01R234A56N78S90C12E12I3V456E78R90S12

REAL-TIME TRANSFER

BUS B TO A

REAL-TIME TRANSFER

BUS A TO B

BUS

A

BUS

B

BUS

A

BUS

B

646/648/ DIR G CPAB CPBA SAB SBA

2646 L L X

X

X

L

651/652/ GAB GBA CPAB CPBA SAB SBA

2652 L L X

X

X

L

STORAGE FROM

A AND/OR B

BUS

A

BUS

B

646/648/ DIR G CPAB CPBA SAB SBA

2646 H L X

X

L

X

651/652/ GAB GBA CPAB CPBA SAB SBA

2652 H H X

X

L

X

TRANSFER STORES

DATA TO A AND/OR B

BUS

A

BUS

B

646/648/ DIR G CPAB CPBA SAB SBA

2646 H L ↑

X

X

X

LL X

↑

X

X

XH ↑

↑

X

X

651/652/ GAB GBA CPAB CPBA SAB SBA

2652 X H ↑

X

X

X

LX X

↑

X

X

LH ↑

↑

X

X

646/648(1) DIR G CPAB CPBA SAB SBA

2646 L L X H or L X

H

H L H or L X

H

X

651/652/ GAB GBA CPAB CPBA SAB SBA

2652 H L H or L H or L H

H

1. Note: The FCT646/2646 cannot transfer data to

A bus and B bus simultaneously.

3

PS2022A 03/11/96

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