1 Features

• Buffered inputs and outputs

• Four operating modes

• Typical propagation delay of 15ns at VCC = 5V, CL

= 15pF, TA = 25oC

• 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 ICs

• 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 compatability, VIL = 0.8

V (max), VIH = 2 V (min)

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

2 Description

The CDx4HC(T)259 is an 8-bit addressable latch with

three active modes of operation (addressable latch,

memory, 8-line demultiplexer) and one reset mode.