SN54LS155J Freescale Semiconductor, Inc, SN54LS155J Datasheet

SN54LS155J

Manufacturer Part Number

SN54LS155J

Description

Manufacturer

Freescale Semiconductor, Inc

Datasheet

1.SN54LS155J.pdf (6 pages)

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DUAL 1-OF-4 DECODER/

DEMULTIPLEXER

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.

process for high speed and are completely compatible with all Motorola TTL

families.

NOTES:

a) 1 TTL Unit Load (U.L.) = 40 A 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)

PIN NAMES

A 0 , A 1

E a , E b

E a

O 0 – O 3

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

resistor.

The SN54 / 74LS155 and SN54 / 74LS156 are high speed Dual 1-of-4

The LS155 and LS156 are fabricated with the Schottky barrier diode

Schottky Process for High Speed

Multifunction Capability

Common Address Inputs

True or Complement Data Demultiplexing

Input Clamp Diodes Limit High Speed Termination Effects

ESD > 3500 Volts

V CC

E a

E b

E a

Address Inputs

Enable (Active LOW) Inputs

Enable (Active HIGH) Input

Active LOW Outputs (Note b)

CONNECTION DIAGRAM DIP (TOP VIEW)

E b

A 1

O 3a

A 0

O 3b

O 2a

O 2b

O 1a

O 1b

O 0a

GND

O 0b

FAST AND LS TTL DATA

NOTE:

The Flatpak version

(Connection Diagram) as

the Dual In-Line Package.

has the same pinouts

0.5 U.L.

HIGH

10 U.L.

LOADING (Note a)

5-262

5 (2.5) U.L.

0.25 U.L.

LOW

DECODER a

SN54/74LS155

SN54/74LS156

DUAL 1-OF-4 DECODER/

LS156-OPEN-COLLECTOR

ORDERING INFORMATION

LOW POWER SCHOTTKY

SN54LSXXXJ

SN74LSXXXN Plastic

SN74LSXXXD SOIC

1 2

DEMULTIPLEXER

LOGIC SYMBOL

A 0

A 1

V CC = PIN 16

GND = PIN 8

13 3

Ceramic

CASE 751B-03

A 0

A 1

CASE 620-09

CASE 648-08

CERAMIC

N SUFFIX

D SUFFIX

J SUFFIX

PLASTIC

SOIC

10 11 12

14 15

DECODER b

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SN54LS155J Summary of contents

Page 1

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 ...

Page 2

SN54/74LS155 SN54/74LS156 LOGIC DIAGRAM PIN 16 GND = PIN 8 = PIN NUMBERS FUNCTIONAL DESCRIPTION The LS155 and LS156 are Dual 1-of-4 Decoder/Demulti- plexers with common Address inputs and separate gated Enable inputs. When enabled, each decoder ...

Page 3

GUARANTEED OPERATING RANGES Symbol Parameter V CC Supply Voltage T A Operating Ambient Temperature Range I OH Output Current — High I OL Output Current — Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Symbol Parameter Parameter V IH Input ...

Page 4

GUARANTEED OPERATING RANGES Symbol Parameter V CC Supply Voltage T A Operating Ambient Temperature Range V OH Output Voltage — High I OL Output Current — Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Symbol Parameter Parameter V IH Input ...

Page 5

G - 0.25 (0.010 - SEATING -T- PLANE 0.25 (0.010) ...

Page 6

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of ...

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