Flip Flop D-Type Bus Interface Pos-Edge 3-ST 1-Element 20-Pin SOIC T/R

The RCA-CD54/74AC564 and CD54/74AC574 and the CD54/74ACT564 and CD54/74ACT574 octal D-type, 3-state, positive-edge-triggered flip-flops use the RCA ADVANCED CMOS technology. The eight flip-flops enter data into their registers on the LOW-to-HIGH transition of the clock (CP). The Output Enable (OE) controls the 3-state outputs and is independent of the register operation. When the Output Enable (OE) is HIGH, the outpus are in the high-impendance state. The CD54/74AC/ACT564 and CD54/74AC/ACT574 share the same pin configurations; the CD54/74AC/ACT564, however, has inverted outputs and the CD54/74AC/ACT574 has non-inverted outputs. The CD74AC/ACT564 and CD74AC/ACT574 are supplied in 20-lead dual-in-line plastic packages (E suffix) and in 20-lead dual-in-line small-outline plastic pakcages (M suffix). Both package types are operable over the following temperature range: Commercial (0- to 70°C); Industrial (-40 to +85°C); and Extended Industrial/Military (-55 to +125°C). The CD54AC/ACT564 and CD54AC/ACT574, available in chip form (H suffix), are operable over the -55 to +125°C temperature range.

Buffered inputs

Typical propagation delay:
6.5 ns @ V_CC = 5 V, T_A = 25°C, C_L = 50 pF

Exceeds 2-kV ESD Protection - MIL-STD-883, Method 3015

SCR-Latchup-resistant CMOS process and circuit design

Speed of bipolar FAST*/AS/S with significantly reduced power consumption

Balanced propagation delays

AC types feature 1.5-V to 5.5-V operation and balanced noise immunity at 30% of the supply

±24-mA output drive current
-Fanout to 15 FAST* ICs
-Drives 50-ohm transmission lines

Characterized for operation from –40° to 85°C