© 2005 Fairchild Semiconductor Corporation

DS009961

www.fairchildsemi.com

November 1988

Revised March 2005

74AC377 • 74ACT377

Octal D-Type Flip-Flop with Clock Enable

General Description

The AC/ACT377 has eight edge-triggered, D-type flip-flops

with individual D inputs and Q outputs. The common buff-

ered Clock (CP) input loads all flip-flops simultaneously,

when the Clock Enable (CE) is LOW.

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

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

tion, is transferred to the corresponding flip-flop’s Q output.

The CE input must be stable only one setup time prior to

the LOW-to-HIGH clock transition for predictable operation.

Features

s Ideal for addressable register applications

s Clock enable for address and data synchronization

applications

s Eight edge-triggered D-type flip-flops

s Buffered common clock

s Outputs source/sink 24 mA

s See 273 for master reset version

s See 373 for transparent latch version

s See 374 for 3-STATE version

s ACT377 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.

Connection Diagram

Pin Descriptions

FACT

¥ is a trademark of Fairchild Semiconductor Corporation.

Order Number

Package

Package Description

Number

74AC377SC

M20B

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

74AC377SJ

M20D

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

74AC377MTC

MTC20

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

74AC377MTCX_NL

(Note 1)

MTC20

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

Wide

74AC377PC

N20A

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

74ACT377SC

M20B

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

74ACT377SJ

M20D

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

74ACT377MTC

MTC20

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

74ACT377PC

N20A

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

Pin Names

Description

Data Inputs

CE

Clock Enable (Active LOW)

Data Outputs

CP

Clock Pulse Input