TI SN74ABTE16245DL

The ABTE16245 device is a 16-bit (dual 8-bit) non-inverting, 3-state bus transceiver designed for synchronous bidirectional communication between data buses. The implementation of control functions minimizes external timing requirements. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. Based on the logic level of the direction control (DIR) input, data transfer is allowed from bus A to bus B, or from bus B to bus A. The output enable (OE) input can be used to disable the device, effectively isolating the buses. When OE is low, the device is active. The B port features an equivalent 25Ω series output resistance to reduce ringing. The B port also includes active bus-hold inputs to maintain unused or floating inputs at a valid logic level. The A port outputs can be precharged via VCCBIAS, establishing a voltage between 1.3 V and 1.7 V when VCC is disconnected. The active bus-hold circuit maintains unused or undriven inputs at a valid logic state. The use of pull-up or pull-down resistors with the bus-hold circuit is not recommended.

• Texas Instruments Widebus™ family product
• VME64 ETL specification compliant
• Reduced TTL-compatible input threshold range
• High-drive outputs (IOH = -60mA, IOL = 90mA)
• 25Ω incident wave switching support
• VCCBIAS pin minimizes signal distortion during live insertion
• OE pin with internal pull-up resistor maintains outputs in high-impedance state during power-up/power-down
• Distributed VCC and GND pins reduce high-speed switching noise
• B-port with equivalent 25Ω series damping resistors
• Bus-hold on data inputs eliminates external pull-up/pull-down resistors