SN74CBT34X245

32-BIT FET BUS SWITCH

SCDS089C – MAY 1999 – REVISED MAY 2001

1

POST OFFICE BOX 655303

Family

Layout

Operation

JESD 78, Class II

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

description

The SN74CBT34X245 provides 32 bits of

high-speed TTL-compatible bus switching. The

low on-state resistance of the switch allows

connections to be made with minimal propagation

delay.

The device is organized as four 8-bit bus switches,

two 16-bit bus switches, or one 32-bit bus switch.

When output enable (OE) is low, the switch is on,

and port A is connected to port B. When OE is

high, the switch is open, and the high-impedance

state exists between the two ports.

This device is fully specified for partial-power-

disables

the

outputs,

preventing

damaging

current backflow through the device when it is

powered down.

DBB PACKAGE

(TOP VIEW)

NC – No internal connection

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NC

1A1

1A2

1A3

1A4

1A5

1A6

1A7

1A8

GND

NC

2A1

2A2

2A3

2A4

2A5

2A6

2A7

2A8

GND

NC

3A1

3A2

3A3

3A4

3A5

3A6

3A7

3A8

GND

NC

4A1

4A2

4A3

4A4

4A5

4A6

4A7

4A8

GND

1OE

1B1

1B2

1B3

1B4

1B5

1B6

1B7

1B8

2OE

2B1

2B2

2B3

2B4

2B5

2B6

2B7

2B8

3OE

3B1

3B2

3B3

3B4

3B5

3B6

3B7

3B8

4OE

4B1

4B2

4B3

4B4

4B5

4B6

4B7

4B8

Copyright

 2001, 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.

Widebus+ is a trademark of Texas Instruments.

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.