54ACT16620, 74ACT16620

16BIT BUS TRANSCEIVERS

WITH 3STATE OUTPUTS

SCAS184A − JUNE 1990 − REVISED APRIL 1996

1

POST OFFICE BOX 655303

POST OFFICE BOX 1443

Widebus

 Family

PCB Layout

Minimizes High-Speed Switching Noise

CMOS) 1-

µm Process

125

°C

Shrink Small-Outline (DL) Packages Using

25-mil Center-to-Center Pin Spacings and

380-mil Fine-Pitch Ceramic Flat (WD)

Packages Using 25-mil Center-to-Center

Pin Spacings

description

The ’ACT16620 are inverting 16-bit transceivers

designed

for

asynchronous

communication

between

data

buses.

The

control-function

implementation allows for maximum flexibility in

timing.

These devices can be used as two 8-bit

transceivers or one 16-bit transceiver. They allow

data transmission from the A bus to the B bus or

from the B bus to the A bus, depending on the logic

level at the output-enable (OEAB or OEBA)

inputs. The output-enable inputs can be used to

disable the device so that the buses are effectively

isolated.

The dual-enable configuration gives the transceiver the capability to store data by simultaneously enabling

OEAB and OEBA. Each output reinforces its input in this transceiver configuration. Thus, when both control

inputs are enabled and all other data sources to the two sets of bus lines are at high impedance, the bus lines

remain at their last states.

The 74ACT16620 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and

functionality of standard small-outline packages in the same printed-circuit-board area.

The 54ACT16620 is characterized for operation over the full military temperature range of −55

°C to 125°C. The

74ACT16620 is characterized for operation from −40

°C to 85°C.

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1OEAB

1B1

1B2

GND

1B3

1B4

1B5

1B6

GND

1B7

1B8

2B1

2B2

GND

2B3

2B4

2B5

2B6

GND

2B7

2B8

2OEAB

1OEBA

1A1

1A2

GND

1A3

1A4

1A5

1A6

GND

1A7

1A8

2A1

2A2

GND

2A3

2A4

2A5

2A6

GND

2A7

2A8

2OEBA

54ACT16620 . . . WD PACKAGE

74ACT16620 . . . DL PACKAGE

(TOP VIEW)

Copyright

 1996, Texas Instruments Incorporated

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information 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.

EPIC and Widebus are trademarks of 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.