74ETL16245

54 74ETL16245 16-Bit Data Transceiver with Incident Wave Switching PRELIMINARY May 1994 54 74ETL16245 16-Bit Data Transceiver with Incident Wave Switching General Description The 54 74ETL16245 contains sixteen non-inverting bidirectional buffers with TRI-STATE outputs designed with incident wave switching live insertion support and enhanced noise margin for TTL backplane applications Both the A and B ports include a bus hold circuit to latch the output to the value last forced on that pin The B port of this device includes 25X series output resistors which minimize undershoot and ringing Features Y Supports the VME64 ETL specification Y Functionally and pin compatible with industry standard TTL 16245 SSOP pinout Y Improved TTL-compatible input threshold range Y High drive TTL-compatible outputs (IOH e b60 mA IOL e 90 mA) Y Supports 25X incident wave switching on the A port Y BiCMOS design significantly reduces power dissipation Y Distributed VCC and GND pin configuration minimizes high-speed switching noise Y 25X series-dampening resistor on B-port Y Available in 48-pin SSOP and ceramic flatpak Y Guaranteed output skew Y Guaranteed simultaneous switching noise level and dynamic threshold performance Y Guaranteed latchup protection Logic Symbol Connection Diagram Pin Assignment for SSOP and Flatpak TL F 11654 – 1 Pin Description Pin Names DIR OE An Bn Description Transmit Receive Input Output Enable Input (Active LOW) Backplane Bus Data Local Bus Data TRI-STATE is ...