SN74LS259

Manufacturer Part NumberSN74LS259
DescriptionLOW POWER SCHOTTKY
ManufacturerONSEMI [ON Semiconductor]
SN74LS259 datasheet
 


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SN74LS259
8-Bit Addressable Latch
The SN74LS259 is a high-speed 8-Bit Addressable Latch designed
for general purpose storage applications in digital systems. It is a
multifunctional device capable of storing single line data in eight
addressable latches, and also a 1-of-8 decoder and demultiplexer with
active HIGH outputs. The device also incorporates an active LOW
common Clear for resetting all latches, as well as, an active LOW
Enable.
Serial-to-Parallel Conversion
Eight Bits of Storage With Output of Each Bit Available
Random (Addressable) Data Entry
Active High Demultiplexing or Decoding Capability
Easily Expandable
Common Clear
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
V
Supply Voltage
4.75
CC
T
Operating Ambient
A
Temperature Range
I
Output Current – High
OH
I
Output Current – Low
OL
Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
Typ
Max
Unit
5.0
5.25
V
0
25
70
C
– 0.4
mA
8.0
mA
Device
SN74LS259N
SN74LS259D
1
http://onsemi.com
LOW
POWER
SCHOTTKY
16
1
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Package
Shipping
16 Pin DIP
2000 Units/Box
16 Pin
2500/Tape & Reel
Publication Order Number:
SN74LS259/D

SN74LS259 Summary of contents

  • Page 1

    ... SN74LS259 8-Bit Addressable Latch The SN74LS259 is a high-speed 8-Bit Addressable Latch designed for general purpose storage applications in digital systems multifunctional device capable of storing single line data in eight addressable latches, and also a 1-of-8 decoder and demultiplexer with active HIGH outputs. The device also incorporates an active LOW common Clear for resetting all latches, as well as, an active LOW Enable ...

  • Page 2

    ... SN74LS259 CONNECTION DIAGRAM DIP (TOP VIEW PIN NAMES Address Inputs Data Input E Enable (Active LOW) Input C Clear (Active LOW) Input Q – Q Parallel Latch Outputs ...

  • Page 3

    ... FUNCTIONAL DESCRIPTION The SN74LS259 has four modes of operation as shown in the mode selection table. In the addressable latch mode, data on the Data line (D) is written into the addressed latch.The addressed latch will follow the data input with all non-addressed latches remaining in their previous states. In the memory mode, all latches remain in their previous state and are unaffected by the Data or Address inputs ...

  • Page 4

    ... Turn-On Delay, Address to Output PHL t Turn-On Delay, Clear to Output PHL AC SET-UP REQUIREMENTS ( Symbol t Input Setup Time s t Pulse Width, Clear or Enable W t Hold Time, Data h t Hold Time, Address h SN74LS259 (unless otherwise specified) Limits Min Typ Max Unit 2.0 V 0.8 V – 0.65 – 1.5 V 2.7 3.5 V 0.25 0.4 V 0.35 0.5 ...

  • Page 5

    ... The Address to Enable Setup Time is the time before the HIGH-to-LOW Enable transition that the Address must be stable so that the correct latch is addressed and the other latches are not affected. 2. The shaded areas indicate when the inputs are permitted to change for predictable output performance. SN74LS259 AC WAVEFORMS D ...

  • Page 6

    ... SEATING –T– PLANE 0.25 (0.010 SN74LS259 N SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. ...

  • Page 7

    ... G K –T– SEATING PLANE 0.25 (0.010 SN74LS259 PACKAGE DIMENSIONS D SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE 0.25 (0.010 http://onsemi.com 7 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14 ...

  • Page 8

    ... Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–8549 Phone: 81–3–5487–8345 Email: r14153@onsemi.com Fax Response Line: 303–675–2167 800–344–3810 Toll Free USA/Canada ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 SN74LS259/D ...