These octal transceivers are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.
The 'LVT543 contain two sets of D-type latches for temporary
storage of data flowing in either direction. Separate latch-enable
(
or
) and output-enable(
or
) inputs are
provided for each register to permit independent control in either
direction of data flow.
The A-to-B enable (
)
input must be low in order to enter data from A or to output data
from B. If is low and
is low, the
A-to-B latches are transparent; a subsequent low-to-high transition
of puts the A
latches in the storage mode. With and both low, the
3-state B outputs are active and reflect the data present at the
output of the A latches. Data flow from B to A is similar but
requires using the 
,, and inputs.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
To ensure the high-impedance state during power up or power down,
should be tied
to VCC through a pullup resistor; the minimum value of the
resistor is determined by the current-sinking capability of the
driver.
The SN74LVT543 is available in TI's shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54LVT543 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LVT543 is characterized for operation from -40°C to 85°C.
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Das 14-24-LOGIC-EVM-Evaluierungsmodul (EVM) ist für die Unterstützung aller Logikgeräte konzipiert, die sich in einem 14-Pin- bis 24-Pin-D-, DW-, DB-, NS-, PW-, DYY- oder DGV-Gehäuse befinden.
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| SOIC (DW) | 24 | Ultra Librarian |
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