SN54LS259 Datasheet, PDF (1/6 Pages) Motorola, Inc – 8-BIT ADDRESSABLE LATCH

8-BIT ADDRESSABLE LATCH
The SN54/ 74LS259 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
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC C E D Q7 Q6 Q5 Q4
16 15 14 13 12 11 10 9
1
2
3
4
5
6
78
Ao A1 A2 Q0 Q1 Q2 Q3 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
A0, A1, A2
D
E
C
Q0 to Q7
Address lnputs
Data Input
Enable (Active LOW) Input
Clear (Active LOW) input
Parallel Latch Outputs (Note b)
0.5 U.L.
0.5 U.L.
1.0 U.L.
0.5 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
0.5 U.L.
0.25 U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
SN54/74LS259
8-BIT ADDRESSABLE LATCH
LOW POWER SCHOTTKY
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
Output Current — High
IOL
Output Current — Low
Min
Typ
Max
Unit
54
4.5
5.0
5.5
V
74
4.75
5.0
5.25
54
– 55
25
125
°C
74
0
25
70
54, 74
– 0.4
mA
54
4.0
mA
74
8.0
FAST AND LS TTL DATA
5-433