74F777

INTEGRATED CIRCUITS 74F777 Triple bidirectional latched bus transceiver (3-State + open collector) Product specification IC15 Data Handbook 1992 May 19 Philips Semiconductors Philips Semiconductors Product specification Triple bidirectional latched bus transceiver (3–State + Open Collector) 74F777 FEATURES Latching transceiver High drive Open Collector output current with minimum output swing range of 20 to 50 ohms and is terminated on each end with a 30 to 40 ohm resistor. The 74F777 is a triple bidirectional transceiver with Open Collector B and 3–State A port output drivers. A latch function is provided for the A port signals. The B port output driver is designed to sink 100mA from 2 volts to minimize crosstalk and ringing on the bus. A separate output threshold clamp voltage (VX) is provided to prevent the A port output High level from exceeding future high density processor supply voltage levels. For 5 volt systems, VX is simply tied to VCC. TYPE 74F777 TYPICAL PROPAGATION DELAY 7.0ns TYPICAL SUPPLY CURRENT( TOTAL) 45mA Compatible with Test Mode (TM) bus specification Controlled output ramp Multiple package options Industrial temperature range available (–40°C to +85°C) DESCRIPTION The 74F777 is a triple bidirectional latched bus transceiver and is intended to provide the electrical interface to a high performance wired–OR bus. This bus has a loaded characteristics impedance ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%...