0
ACTIVE
Supply voltage (min) (V) |
4.5 |
Supply voltage (max) (V) |
5.5 |
Number of channels |
18 |
IOL (max) (mA) |
64 |
IOH (max) (mA) |
-32 |
Input type |
TTL-Compatible CMOS |
Output type |
Push-Pull |
Features |
Over-voltage tolerant inputs, Partial power down (Ioff), Ultra high speed (tpd <5ns) |
Technology family |
ABT |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 85 |
SSOP (DL)-56-190.647 mm² 18.42 x 10.35
Widebus, EPIC-IIB, and UBT are trademarks of Texas Instruments Incorporated.
These 18-bit universal bus transceivers consist of storage elements that can operate either as D-type latches or D-type flip-flops to allow data flow in transparent or clocked modes.
Data flow in each direction is controlled by output-enable (OEAB
and 
), latch-enable
(LEAB and LEBA), and clock (CLKAB and CLKBA) inputs. For A-to-B data
flow, the device operates in the transparent mode when LEAB is high.
When LEAB is low, the A data is latched if CLKAB is held at a high or
low logic level. If LEAB is low, the A data is stored in the
latch/flip-flop on the low-to-high transition of CLKAB. When OEAB is
high, the outputs are active. When OEAB is low, the outputs are in
the high-impedance state.
Data flow for B to A is similar to that of A to B but uses, LEBA, and CLKBA. The output
enables are complementary (OEAB is active high and is active low).
To ensure the high-impedance state during power up or power down,
OE should be tied to GND through a pulldown resistor and
should be tied to VCC
through a pullup resistor; the minimum value of the resistor is
determined by the current-sourcing/current-sinking capability of the
driver.
The SN54ABT16501 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABT16501 is characterized for operation from -40°C to 85°C.
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