© 2005 Fairchild Semiconductor Corporation

DS500029

www.fairchildsemi.com

July 1997

Revised April 2005

74VHCT574A

Octal D-Type Flip-Flop with 3-STATE Outputs

General Description

The VHCT574A is an advanced high speed CMOS octal

flip-flop with 3-STATE output fabricated with silicon gate

CMOS technology. It achieves the high speed operation

similar to equivalent Bipolar Schottky TTL while maintain-

ing the CMOS low power dissipation. This 8-bit D-type flip-

flop is controlled by a clock input (CP) and an Output

Enable input (OE). When the OE input is HIGH, the eight

outputs are in a high impedance state.

Protection circuits ensure that 0V to 7V can be applied to

the input and output (Note 1) pins without regard to the

supply voltage. This device can be used to interface 3V to

5V systems and two supply systems such as battery back

up. This circuit prevents device destruction due to mis-

matched supply and input voltages.

Note 1: Outputs in OFF-State.

Features

■ Power Down Protection is provided on all inputs and

outputs.

■ Low Power Dissipation:

25

qC

■ Pin and Function Compatible with 74HCT574

Ordering Code:

Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Pb-Free package per JEDEC J-STD-020B.

Logic Symbol

IEEE/IEC

Connection Diagram

Order Number

Package Number

Package Description

74VHCT574AM

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74VHCT574ASJ

M20D

Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74VHCT574AMTC

MTC20

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74VHCT574AN

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide