Description
Texas Instruments SN74LVC543APWR Octal Registered Transceiver With 3-State Outputs, Latched Transceiver, 8-Bit Non-Inverting LVTTL, 1.65 → 3.6 V, 24-Pin TSSOP
Texas Instruments range of Bus Transceivers from the 74LVC Family of Low-voltage CMOS Logic ICs. The 74LVC Family use silicon gate CMOS technology and is designed to operate at 3.3V, allowing a significant reduction in power consumption when compared to 5V systems.
Operating Voltage: 1.65 to 3.6V
5V tolerant inputs
Compatibility: Input LVTTL/TTL, Output LVCMOS
Latch-up performance exceeds 250 mA per JESD 17
ESD protection exceeds JESD 22
This octal registered transceiver is designed for 1.65-V to 3.6-V VCC operation. The SN74LVC543A contains two sets of D-type latches for temporary storage of data flowing in either direction. 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 places 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 for B to A is similar to that of A to B, but uses CEBA, LEBA, and OEBA. 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. 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.
Manufacturer Part Number: SN74LVC543APWR
Manufacturer: Texas Instruments
