dm74ls279m Fairchild Semiconductor, dm74ls279m Datasheet

dm74ls279m

Manufacturer Part Number

dm74ls279m

Description

Quad S-r Latch

Manufacturer

Fairchild Semiconductor

Datasheet

1.DM74LS279M.pdf (4 pages)

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DM74LS279M

DM74LS279N

DM74LS279

Quad S-R Latch

General Description

The DM74LS279 consists of four individual and indepen-

dent Set-Reset Latches with active low inputs. Two of the

four latches have an additional S input ANDed with the pri-

mary S input. A LOW on any S input while the R input is

HIGH will be stored in the latch and appear on the corre-

sponding Q output as a HIGH. A LOW on the R input while

the S input is HIGH will clear the Q output to a LOW. Simul-

taneous transition of the R and S inputs from LOW-to-

HIGH will cause the Q output to be indeterminate. Both

inputs are voltage level triggered and are not affected by

transition time of the input data.

Ordering Code:

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

Connection Diagram

Order Number

Package Number

M16A

N16E

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

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

DS006420

Function Table

Note 1: For latches with double S inputs:

Note 2: This output level is pseudo stable; that is, it may not persist when

LOW Level

HIGH Level

the S and R inputs return to their inactive (HIGH) level.

The Level of Q before the indicated input conditions were established.

one or both S inputs LOW

both S inputs HIGH

Package Description

S (Note 1)

Inputs

August 1986

Revised March 2000

H (Note 2)

Output

www.fairchildsemi.com

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dm74ls279m Summary of contents

Page 1

... Ordering Code: Order Number Package Number DM74LS279M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS279N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “ ...

Page 2

Absolute Maximum Ratings Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level Input Voltage IH V LOW Level Input Voltage IL I HIGH Level Output ...

Page 3

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A 3 www.fairchildsemi.com ...

Page 4

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right ...

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