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SN54-74LS155 PDF预览

SN54-74LS155

更新时间: 2024-11-12 06:12:51
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 解码器解复用器
页数 文件大小 规格书
4页 82K
描述
DUAL 1-OF-4 DECODER/ DEMULTIPLEXER

SN54-74LS155 数据手册

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SN54/74LS155  
SN54/74LS156  
DUAL 1-OF-4 DECODER/  
DEMULTIPLEXER  
The SN54/74LS155 and SN54/74LS156 are high speed Dual 1-of-4  
Decoder/Demultiplexers. These devices have two decoders with common  
2-bit Address inputs and separate gated Enable inputs. Decoder “a” has an  
Enable gate with one active HIGH and one active LOW input. Decoder “b” has  
two active LOW Enable inputs. If the Enable functions are satisfied, one  
output of each decoder will be LOW as selected by the address inputs. The  
LS156 has open collector outputs for wired-OR (DOT-AND) decoding and  
function generator applications.  
DUAL 1-OF-4 DECODER/  
DEMULTIPLEXER  
LS156-OPEN-COLLECTOR  
LOW POWER SCHOTTKY  
The LS155 and LS156 are fabricated with the Schottky barrier diode  
process for high speed and are completely compatible with all Motorola TTL  
families.  
Schottky Process for High Speed  
Multifunction Capability  
J SUFFIX  
CERAMIC  
CASE 620-09  
Common Address Inputs  
16  
True or Complement Data Demultiplexing  
Input Clamp Diodes Limit High Speed Termination Effects  
ESD > 3500 Volts  
1
N SUFFIX  
PLASTIC  
CASE 648-08  
16  
CONNECTION DIAGRAM DIP (TOP VIEW)  
1
V
E
E
A
O
O
O
O
0b  
CC  
16  
b
b
0
3b  
12  
2b  
11  
1b  
10  
15  
14  
13  
9
D SUFFIX  
SOIC  
CASE 751B-03  
NOTE:  
The Flatpak version  
has the same pinouts  
(Connection Diagram) as  
the Dual In-Line Package.  
16  
1
ORDERING INFORMATION  
1
2
3
4
5
6
8
7
SN54LSXXXJ Ceramic  
SN74LSXXXN Plastic  
SN74LSXXXD SOIC  
E
E
A
O
O
O
O
0a  
GND  
a
a
1
3a  
2a  
1a  
LOGIC SYMBOL  
PIN NAMES  
LOADING (Note a)  
1
2
13 3  
14 15  
HIGH  
LOW  
A , A  
Address Inputs  
Enable (Active LOW) Inputs  
Enable (Active HIGH) Input  
0.5 U.L.  
0.5 U.L.  
0.5 U.L.  
10 U.L.  
0.25 U.L.  
0.25 U.L.  
0.25 U.L.  
0
1
b
E , E  
a
a
E
E
E
O O  
Active LOW Outputs (Note b)  
5 (2.5) U.L.  
A
A
A
A
0
3
0
0
DECODER a  
DECODER b  
NOTES:  
1
1
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.  
0
1
2
3
0
1
2
3
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)  
Temperature Ranges. The HIGH level drive for the LS156 must be established by an external  
resistor.  
7
6
5
4
9
10 11 12  
V
= PIN 16  
CC  
GND = PIN 8  
FAST AND LS TTL DATA  
5-1  

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