Datasheet DM74ALS253N, DM74ALS253MX, DM74ALS253M Datasheet (Fairchild Semiconductor)

© 2000 Fairchild Semiconductor Corporation DS006215 www.fairchildsemi.com

April 1984
Revised February 2000

DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer

DM74ALS253
3-STATE Dual 1-of-4 Line Data Selector/Multiplexer

General Description

This Data Selector/Multi plexer contain s full on-chip decod­ing to select one-of-four data sources as a result of a
unique two-bit binary code at the Select Inputs. Each of the
two Data Selector/Multipl e xer c irc uits have the i r own sep a­rate Data and Output Contr ol inputs an d a non- inver ting 3­STATE output buffer. The Output Contro l inputs, when at
the high level, place the correspondi ng output in the high
impedance OFF-State. In order to prevent bus access con­flicts, output disable times a re shorter than output enabl e
times. The Select i npu t b uffers inco rp ora te internal overlap
features to ensure tha t select inpu t changes do not cause
invalid output transients.

Features

■ Advanced oxide-isolated, ion-implanted Schottky TTL
process

■ Switching performan ce is gu aranteed over full tempe ra­ture and V

CC

supply range

■ Pin and functional compatible with LS family counterpart

■ Improved output transient handling capability

■ Output control circuit ry incorporates po wer-up 3-STATE

feature

Ordering Code:

Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.

Connection Diagram Function Table

Address inputs A an d B are common to both sec t ions
H = HIGH Level
L = LOW Level
X = Don't Care
Z = High Impedance

Order Number Package Number Package Description

DM74ALS253M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74ALS253N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Select Data Inputs Output Output
Inputs Control

BAC0C1C2C3 G

Y

XXXXXX H Z
LL L X X X L L
LLH X X X L H
LH X L X X L L
LH X H X X L H
HL X X L X L L
HL X X H X L H
HHXXXL L L
HHXXXH L H

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DM74ALS253

Logic Diagram

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DM74ALS253

Absolute Maximum Ratings(Note 1)

Note 1: The “Absolute M aximu m R atin gs” are t hose valu es b eyo nd w hich

the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommend ed O peratin g Cond itions” t able w ill defin e the condition s
for actual device operation.

Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.

Switching Characteristics

over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.

Supply Voltage, V

CC

7V
Input Voltage 7V
Voltage Applied to Disabled Output 5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θ

JA

N Package 78.0°C/W
M Package 107.0°C/W

Symbol Parameter Min Nom Max Units

V

CC

Supply Voltage 4.5 5 5.5 V

V

IH

HIGH Level Input Voltage 2 V

V

IL

LOW Level Input Voltage 0.8 V

I

OH

HIGH Level Output Current −2.6 mA

I

OL

LOW Level Output Current 24 mA

T

A

Free Air Operating Temperature 0 70 °C

Symbol Parameter Conditions Min Typ Max Units

V

IK

Input Clamp Voltage VCC = 4.5V, IIN = −18 mA −1.5 V

V

OH

HIGH Level VCC = 4.5V, IOH = Max 2.4 3.2

V

Output Voltage IOH = 400 µA, VCC = 4.5V to 5.5V VCC − 2

V

OL

LOW Level VCC = 4.5V IOL = 12 mA 0.25 0.4

V

Output Voltage IOL = 24 mA 0.35 0.5

I

I

Input Current at Maximum input Voltage VCC = 5.5V, VIN = 7V 0.1 mA

I

IH

HIGH Level Input Current VCC = 5.5V, VIN = 2.7V 20 µA

I

IL

LOW Level Input Current VCC = 5.5V, VIN = 0.4V −0.1 mA

I

O

Output Drive Current VCC = 5.5V, V

OUT

= 2.25V −30 −112 mA

I

OZH

OFF-State Output Current, HIGH Bias VCC = 5.5V, V

OUT

= 2.7V 20 µA

I

OZL

OFF-State Output Current, LOW Bias VCC = 5.5V, V

OUT

= 0.4V −20 µA

I

CC

Supply Current VCC = 5.5V Output HIGH 6.5 12

Output LOW 6.5 12 mA
Output Disabled 7.5 14

Symbol Parameter Conditions

From (Input)

Min Max Units

To (Outpu t)

t

PLH

Propagation Delay Time VCC = 4.5V to 5.5V

Select to Y 5 21 ns

LOW-to-HIGH Level Output CL = 50 pF

t

PHL

Propagation Delay Time RL = 500Ω

Select to Y 5 21 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

Data to Y 2 10 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Data to Y 3 14 ns

HIGH-to-LOW Level Output

t

PZH

Output Enable Time to HIGH Level Output Output Control to Y 3 14 ns

t

PZL

Output Enable Time to LOW Level Output Output Control to Y 4 16 ns

t

PHZ

Output Disable Time from HIGH Level Output Output Control to Y 2 10 ns

t

PLZ

Output Disable Time from LOW Level Output Output Control to Y 2 14 ns

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DM74ALS253

Physical Dimensions inches (millimeters) unless otherwise noted

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

Package Number M16A

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DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Package Number N16E

Fairchild does not assume any responsibility for use of any circu itry described, no circuit patent license s are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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