SN74ABT543ADWR

The ABT543A octal transceiver contains two sets of D-type latches for temporary storage of bidirectional data. Each register set provides separate latch enable (LEAB or LEBA) and output enable (OEAB or OEBA) inputs, allowing independent control of data flow in either direction. The A-to-B enable (CEAB) input must be low to input data from port A or output data from port B. When CEAB is low and LEAB is low, the A-to-B latches operate in transparent mode; a subsequent low-to-high transition on LEAB places the A latches in storage mode. When both CEAB and OEAB are low, the 3-state B outputs are activated, reflecting the data at the outputs of the A latches. Data flow from B to A operates similarly, but uses the CEBA, LEBA, and OEBA inputs. To ensure a high-impedance state during power-up or power-down, OE should be connected to VCC through a pull-up resistor; the minimum resistor value is determined by the sink current capability of the driver. The SN74ABT543A operating temperature range is -40°C to 85°C.

Key features

• EPIC-IIB™ BiCMOS design for significantly reduced power consumption
• Typical output ground bounce VOLP < 1 V at VCC = 5 V, TA = 25℃
• High-drive outputs (IOH = -32 mA, IOL = 64 mA)
• Available in multiple package options: plastic small outline (DW), shrink small outline (DB), thin shrink small outline (PW), ceramic chip carrier (FK), ceramic flat (W), and plastic (NT) and ceramic (JT) DIP