Datasheet DM74LS253M, DM74LS253N, DM74LS253MX Datasheet (Fairchild Semiconductor)

© 2000 Fairchild Semiconductor Corporation DS006416 www.fairchildsemi.com

August 1986
Revised March 2000

DM74LS253 3-STATE Data Selector/Multiplexer

DM74LS253
3-STATE Data Selector/Multiplexer

General Description

Each of these Schottky-clamped data selector s/multiplex­ers contains inverter s and drivers to supply ful ly comple­mentary, on-chip, binary decoding data selection to the
AND-OR gates. Separate output control inputs are pro­vided for each of the two four-line sections.

The 3-STATE outputs can interface di rectly with data l ines
of bus-organized syste ms. Wit h all but one of the co mmon
outputs disabled (at a high impedance state), the low
impedance of the single enabled output will drive the bus
line to a HIGH or LOW logic level.

Features

■ 3-STATE version of DM74LS153 with same pinout

■ Schottky-diode-clamp ed tra nsisto rs

■ Permit multiplexing from N-lines to one line

■ Performs parallel-to-serial con version

■ Strobe/output control

■ High fanout totem-pole outputs

■ Typical propagation delay

Data to output 12 ns
Select to output 21 ns

■ Typical power di ssipation 35 mW

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 and B are common to both sections.
H = HIGH Level
L = LOW Level
X = Don't Care
Z = High Impedance (OF F )

Order Number Package Number Package Description

DM74LS253M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-0 12, 0.150 Narrow
DM74LS253N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Select Data Inputs Output Output
Inputs Control

B A C0 C1 C2 C3 G Y

XXXXXX H Z
LLLXXX L L
LLHXXX L H
LHXLXX L L
LHXHXX L H
HLXXLX L L
HLXXHX L H
HHXXXL L L
HHXXXH L H

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DM74LS253

Logic Diagram

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DM74LS253

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 thes e limits. The paramet ric values defined in the “Electrical
Characteristics” ta ble are not guaranteed at the absolute maxim um 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 (unless otherwise noted)

Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Note 4: I

CC1

is measured with all outputs OPEN, and al l th e inputs grounded.

Note 5: I

CC2

is measured with the outputs OPEN, OUTPUT CONTROL at 4.5V and all other inputs grounded.

Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C

Symbol Parameter Min Nom Max Units

V

CC

Supply Voltage 4.75 5 5.25 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

(Note 2)

V

I

Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V

V

OH

HIGH Level VCC = Min, IOH = Max

2.4 3.1 V

Output Voltage VIL = Max, VIH = Min

V

OL

LOW Level VCC = Min, IOL = Max

0.5

Output Voltage VIL = Max, VIH = Min V

IOL = 12 mA, VCC = Min 0.4

I

I

Input Current @ Max Input Voltage VCC = Max, VI = 7V 0.1 mA

I

IH

HIGH Level Input Current VCC = Max, VI = 2.7V 20 µA

I

IL

LOW Level Input Current VCC = Max, VI = 0.4V −0.4 mA

I

OZH

Off-State Output Current with VCC = Max, VO = 2.7V

20 µA

HIGH Level Output Voltage Applied VIH = Min, VIL = Max

I

OZL

Off-State Output Current with VCC = Max, VO = 0.4

−20 µA

LOW Level Output Voltage Applied VIH = Min, VIL = Max

I

OS

Short Circuit Output Current VCC = Max (Note 3) −20 −100 mA

I

CC1

Supply Current VCC = Max (Note 4) 7 12 mA

I

CC2

Supply Current VCC = Max (Note 5) 8.5 14 mA

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DM74LS253

Switching Characteristics

at VCC = 5V and TA = 25°C

Note 6: CL = 5 pF.

From (Input)

RL = 667Ω

Symbol Parameter

To (Output)

CL = 45 pF CL = 150 pF Units

MinMaxMinMax

t

PLH

Propagation Delay Time

Data to Y 25 35 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Data to Y 20 30 ns

HIGH-to-LOW Level Output

t

PLH

Propagation Delay Time

Select to Y 45 54 ns

LOW-to-HIGH Level Output

t

PHL

Propagation Delay Time

Select to Y 32 44 ns

HIGH-to-LOW Level Output

t

PZH

Output Enable Time to Output

18 32 ns

HIGH Level Output Control to Y

t

PZL

Output Enable Time to Output

23 35 ns

LOW Level Output Control to Y

t

PHZ

Output Disable Time from Output

41 ns

HIGH Level Output (Note 6) Control to Y

t

PLZ

Output Disable Time from Output

27 ns

LOW Level Output (Note 6) Control to Y

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DM74LS253

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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DM74LS253 3-STATE 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 circuitry described, no circuit pate nt licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea­sonably expected to result in a significant inju ry to the
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device or system whose failu re to perform can be rea­sonably expected to ca use the fa i lure of the life su pp ort
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