Members of the Texas Instruments
Widebus Family
3-State Outputs Drive Bus Lines Directly
Flow-Through Architecture Optimizes
PCB Layout
Distributed VCC and GND Pin
Configurations Minimize High-Speed
Switching Noise
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity at
125°C
Package Options Include Plastic 300-mil
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 ’AC16620 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 complementary 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 74AC16620 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 54AC16620 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74AC16620 is characterized for operation from –40°C to 85°C.