SN74CBT3345

8-BIT FET BUS SWITCH

SCDS027D – MAY 1995 – REVISED MAY 1998

1

POST OFFICE BOX 655303

Small-Outline (DB), Thin Very Small-Outline

(DGV), Small-Outline (DW), and Thin Shrink

Small-Outline (PW) Packages

description

The

SN74CBT3345

provides

eight

bits

of

high-speed TTL-compatible bus switching in a

standard ’245 device pinout. The low on-state

resistance of the switch allows connections to be

made with minimal propagation delay.

The device is organized as one 8-bit switch bank with dual output-enable (OE and OE) inputs. When OE is low

or OE is high, the switch is on and port A is connected to port B. When OE is high and OE is low, the switch is

open and a high-impedance state exists between the two ports.

The SN74CBT3345 is characterized for operation from 0

°C to 70°C.

FUNCTION TABLE

INPUT

OE

FUNCTION

L

A port = B port

H

Disconnect

logic diagram (positive logic)

A1

A8

OE

B1

B8

OE

2

9

1

19

18

11

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

© 1998, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

OE

A1

A2

A3

A4

A5

A6

A7

A8

GND

OE

B1

B2

B3

B4

B5

B6

B7

B8

DB, DGV, DW, OR PW PACKAGE

(TOP VIEW)