SN74LS156NS

更新时间： 2024-11-06 13:00:31

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
6页	213K
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数据手册

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SN74LS156NS 数据手册

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

• True or Complement Data Demultiplexing

• Input Clamp Diodes Limit High Speed Termination Effects

• ESD > 3500 Volts

N SUFFIX

PLASTIC

CASE 648-08

CONNECTION DIAGRAM DIP (TOP VIEW)

D SUFFIX

SOIC

CASE 751B-03

NOTE:

The Flatpak version

has the same pinouts

(Connection Diagram) as

the Dual In-Line Package.

ORDERING INFORMATION

SN54LSXXXJ Ceramic

SN74LSXXXN Plastic

SN74LSXXXD SOIC

LOGIC SYMBOL

PIN NAMES

LOADING (Note a)

HIGH

LOW

A , A

Address Inputs

0.5 U.L.

10 U.L.

0.25 U.L.

E , E

Enable (Active LOW) Inputs

Enable (Active HIGH) Input

Active LOW Outputs (Note b)

O –O

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. The HIGH level drive for the LS156 must be established by an external

resistor.

FAST AND LS TTL DATA

5-262

12 3 4 5 6

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