© 2005 Fairchild Semiconductor Corporation

DS009954

www.fairchildsemi.com

November 1988

Revised March 2005

74AC273 • 74ACT273

Octal D-Type Flip-Flop

General Description

The AC273 and ACT273 have eight edge-triggered D-type

flip-flops with individual D-type inputs and Q outputs. The

common buffered Clock (CP) and Master Reset (MR) input

load and reset (clear) all flip-flops simultaneously.

The register is fully edge-triggered. The state of each D-

type input, one setup time before the LOW-to-HIGH clock

transition, is transferred to the corresponding flip-flop’s Q

output.

All outputs will be forced LOW independently of Clock or

Data inputs by a LOW voltage level on the MR input. The

device is useful for applications where the true output only

is required and the Clock and Master Reset are common to

all storage elements.

Features

s Ideal buffer for microprocessor or memory

s Eight edge-triggered D-type flip-flops

s Buffered common clock

s Buffered, asynchronous master reset

s See 377 for clock enable version

s See 373 for transparent latch version

s See 374 for 3-STATE version

s Outputs source/sink 24 mA

s 74ACT273 has TTL-compatible inputs

Ordering Code:

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

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

Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.

FACT

¥ is a trademark of Fairchild Semiconductor Corporation.

Order Number

Package

Package Description

Number

74AC273SC

M20B

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

74AC273SJ

M20D

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

74AC273MTC

MTC20

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

74AC273PC

N20A

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

74ACT273SC

M20B

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

74ACT273SJ

M20D

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

74ACT273MTC

MTC20

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

74ACT273MTCX_NL

(Note 1)

MTC20

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

Wide

74ACT273PC

N20A

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