This 16-bit registered transceiver is designed for 1.65-V to 3.6-V VCC operation.
The SN74LVCH16543A can be used as two 8-bit transceivers or one 16-bit transceiver. Separate latch-enable (LEAB\ or LEBA\) and output-enable (OEAB\ or OEBA\) inputs are provided for each register, to permit independent control in either direction of data flow.
The A-to-B enable (CEAB\) input must be low to enter data from A or to output data from B. If CEAB\ is low and LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB\ puts the A latches in the storage mode. With CEAB\ and OEAB\ 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 CEBA\, LEBA\, and OEBA\ inputs.
To ensure the high-impedance state during power up or power down, OE\ 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.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. The bus-hold circuitry is part of the input circuit and is not disabled by OE\ or DIR.
Products containing the "SN74LVCH16543A" keyword are: SN74LVCH16543ADGGR , SN74LVCH16543ADGGR , SN74LVCH16543ADGGRG4 , SN74LVCH16543ADL , SN74LVCH16543ADL , SN74LVCH16543ADLR , SN74LVCH16543ADLR , SN74LVCH16543AGQLR , SN74LVCH16543AZQLRWidebus is a trademark of Texas Instruments.
Status | ACTIVE |
SubFamily | Registered transceiver |
Technology Family | LVC |
VCC | 3.6 |
Bits | 16 |
Voltage | 1.8^2.5^2.7^3.3 |
F @ nom voltage | 100 |
tpd @ Nom Voltage | 6.1^5.4 |
IOL | 24 |
Rating | Catalog |
Operating temperature range | -40 to 85 |
Package Group | SSOP|56 |
Package size: mm2:W x L (PKG) | [pf]56SSOP[/pf]: 191 mm2: 10.35 x 18.42 (SSOP|56) |
Approx. price | 0.88 | 1ku |
Schmitt Trigger | No |