74AC245 OCTAL BUS TRANSCEIVER

Sgs-Thomson Microelectronics

Description

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

Sujets

• Première
• Thermal management of electronic devices and systems
• High impedance

Informations

• Publié par: profil-zyan-2012
• Nombre de lectures: 35

Extrait

74AC245 OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS (NON INVERTED)

n HIGH SPEED: t PD = 4.5 ns (TYP.) at V CC = 5V n LOW POWER DISSIPATION: o I CC = 8mA (MAX.) at T A = 25 C n HIGH NOISE IMMUNITY: V NIH = V NIL = 28% V CC (MIN.) n 50WTRANSMISSION LINE DRIVING CAPABILITY n SYMMETRICAL OUTPUT IMPEDANCE: |I OH | = I OL = 24 mA (MIN) n BALANCED PROPAGATION DELAYS: t PLH 4t PHL n OPERATING VOLTAGE RANGE: V CC (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 2 wiring C MOS 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

PIN CONNECTION AND IEC LOGIC SYMBOLS

April 1997

B M (Plastic Package) (Micro Package) ORDER CODES : 74AC245B 74AC245M 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 UP RESISTOR.

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