SN74ABT651DWR

These devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry configured to multiplex data directly from the data bus or from internal storage registers. Output enable (OEAB and OEBA) inputs are provided to control the transceiver function. Select control (SAB and SBA) inputs are provided to choose between real-time and stored data transmission; a low input level selects real-time data, while a high input level selects stored data. Data on the A bus, the B bus, or both can be stored in the internal D flip-flops on the low-to-high transition of the corresponding clock (CLKAB or CLKBA) input, independent of the select or enable control pins. When SAB and SBA are in real-time transfer mode, data transfer can also be achieved by simultaneously enabling OEAB and OEBA without using the internal D-type flip-flops. In this configuration, each output reinforces its input signal. When all other data sources connected to both bus sets are in the high-impedance state, each bus set will retain its last state. To ensure the high-impedance state is maintained during power-up or power-down, OEBA should be connected to VCC through a pull-up resistor; the minimum resistor value is determined by the sink current capability of the driver (B to A). OEAB should be connected to GND through a pull-down resistor; the minimum resistor value is determined by the source current capability of the driver (A to B). The SN54ABT651 operates over a temperature range of -55°C to 125°C, and the SN74ABT651 operates over a temperature range of -40°C to 85°C.

Key features

• EPIC-II B™ BiCMOS design for significantly reduced power consumption
• Latch-up performance exceeds 500 mA, compliant with JESD 17
• Typical output ground bounce (VOLP) less than 1 V at VCC = 5 V, TA = 25℃
• High-drive outputs (-32 mA IOH, 64 mA IOL)
• Multiplexes real-time and stored data
• Inverting data path
• Package options: plastic small-outline (DW), shrink small-outline (DB), thin shrink small-outline (PW), ceramic chip carrier (FK), plastic DIP (NT), and ceramic DIP (JT)