74AC245 OCTAL BUS TRANSCEIVER

Niveau: Secondaire, Lycée, Terminale
74AC245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS (NON INVERTED) April 1997 n HIGH SPEED: tPD = 4.5 ns (TYP.) at VCC = 5V n LOW POWER DISSIPATION: ICC = 8 µA (MAX.) at TA = 25 oC n HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.) n 50? TRANSMISSION LINE DRIVING CAPABILITY n SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL =24 mA (MIN) n BALANCED PROPAGATION DELAYS: tPLH ? tPHL n OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V n PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 245 n IMPROVED LATCH-UP IMMUNITY DESCRIPTION The AC245 is an advanced CMOS OCTAL BUS TRANSCEIVER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power applications mantaining high speed operation similar to equivalent Bipolar Schottky TTL. This IC is intended for two-way asynchronous communication between data buses and the direction of data trasmission is determined by DIR input. The enable input G can be used to disable the device so that the buses are effectively isolated. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. IT IS PROHIBITED TO APPLY A SIGNAL TO A TERMINAL WHEN IT IS IN OUTPUT MODE AND WHEN A BUS THERMINAL IS FLOATING (HIGH IMPEDANCE STATE) IT IS REQUESTED TO FIX THE INPUT LEVEL BY MEANS OF EXTERNAL PULL DOWN OR PULL

• power dissipation


• output current


• dc input


• vol low


• test conditions


• high impedance


• absolute maximum