U74HC640

UNISONIC TECHNOLOGIES CO., LTD U74HC640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS „ DESCRIPTION The U74AHC640 is a octal bus transceivers with 3-state outputs. It is designed for asynchronous two-way communication between data buses. Depending on the direction-control (DIR) input, data are transmitted from the A bus to the B bus or from the B bus to the A bus. When OE is high, the buses are effectively isolated. When OE is low, the buses are enable. „ FEATURES * Wide Supply Voltage Range from 2V to 6V * Typical tPD of 8ns at 6V, CL=50pF * Low Power Consumption, ICC = 8μA (Max) at 5.5V * ±7.8mA Output Driver at 6V CMOS IC „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74AHC640L-R20-R U74AHC640G-R20-R U74AHC640L-R20-T U74AHC640G-R20-T Package SSOP-20 SSOP-20 Packing Tape Reel Tube www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 7 QW-R126-008.A U74HC640 „ PIN CONFIGURATION DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 „ FUNCTION TABLE OE L L H INPUTS DIR L H X „ LOGIC DIAGRAM OE 20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 CMOS IC OPERATION B data to A bus A data to B bus Isolation DIR A1 B1 To seven other transceivers UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R126-008.A U74HC640 CMOS IC „ ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~7 V Input Voltage VIN -0.5~7 V Output Voltage Input Clamp Curr...