1 Features

• Buffered inputs

• Three-state outputs

• Applications in multiple-data-bus architecture

• Fanout (over temperature range)

– Standard outputs : 10 LSTTL loads

– Bus driver outputs : 15 LSTTL loads

• Wide operating temperature range : -55oC to

125oC

• Balanced propagation delay and transition times

• Significant power reduction compared to LSTTL

logic IC's

• HC types

– 2 V to 6 V operation

– High noise immunity: NIL = 30%, NIH = 30% of

VCC at VCC = 5 V

• HCT types

– 4.5 V to 5.5 V operation

– Direct LSTTL input logic compatibility, VIL = 0.8

V(Max), VIH = 2 V(Min)

– CMOS input compatibility, II ≤ 1μA at VOL, VOH

2 Description

The CDx4HC640 and CDx4HCT640 are inverting

octal bus transceivers with 3-state outputs.