DM74LS158CW - Fairchild Semiconductor

September 1986

Revised April 2000

DM74LS157 • DM74LS158 Quad 2-Line to 1-Line Data Selectors/Multiplexer s

DM74LS157 • DM74LS158

Quad 2-Line to 1-Line Data Selectors/Multiplexers

General Descript ion

These data selectors/multiplexers contain inverters and

drivers to supply full on-chip da ta selection to the four out-

put gates. A separate strobe input is provided. A 4-bit word

is selected from one of two sources and is routed to the

four outp uts. The DM 74LS 157 p resent s true data w here as

the DM74LS158 presents inverted data to minimize propa-

gation delay time.

Applications

• Expand any data input point

• Multiplex dual data buses

• Generate four functions of two variables

(o ne variable is common)

• Source programmable coun ters

Features

■Buffered inputs and outputs

■Typical Propagation Time

DM74LS157 9 ns

DM74LS158 7 ns

■Typical Power Dissipation

DM74LS157 49 mW

DM74LS158 24 mW

Ordering Code:

Devices also available in Tape and R eel. Speci fy by appending the s uffix let t er “X” to the o rdering c ode.

Connection Diagrams

DM74LS157 DM74LS158

Order Number Package Number Package Description

DM74LS157M M16A 16-Lead Small Outline Integrated Circuit (SOI C), JEDEC MS-012, 0.150 Narrow

DM74LS157SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II , 5.3mm Wide

DM74LS157N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

DM74LS158M M16A 16-Lead Small Outline Integrated Circuit (SOI C), JEDEC MS-012, 0.150 Narrow

DM74LS158N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

www.fairchildsemi.com 2

DM74LS157 • DM74LS158

Function Table

H = HIGH Level

L = LOW Lev el

X = Don’t Care

Logic Diagrams

DM74LS157 DM74LS158

Inputs Output Y

Strobe Select A B DM74LS157 DM74LS158

HXXXLH

LLLXLH

LLHXHL

LHXLLH

LHXHHL

3 www.fairchildsemi.com

DM74LS157 • DM74LS158

Absolute Maximum Ratings(Note 1) Note 1: The “Abso lute Maximum Ratings” ar e those value s beyond which

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 “Re comm ended Operat ing Co ndition s” table will de fine the cond itions

for actu al device operation.

DM74LS157 Recommended Operating Conditions

DM74LS157 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: N ot m ore than one output sh ould be sh orted at a tim e, and the duration sh ould not ex c eed one sec ond.

Note 4: ICC is meas ured with 4. 5V appli ed t o all input s and all outputs OPE N .

DM74LS157 Switching Characteristics

at VCC = 5V and TA = 25°C

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

VCC Supply Voltage 4.75 5 5.25 V

VIH HIGH Level Input Voltage 2 V

VIL LOW Level Input Voltage 0.8 V

IOH HIGH Level Output Current −0.4 mA

IOL LOW Level Output Current 8 mA

TAFree Air Operating Te mperature 0 70 °C

Symbol Parameter Conditions Min Typ Max Units

(Note 2)

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

VOH HIGH Level Output Voltage VCC = Min, IOH = Max, VIL = Max, VIH = Min 2.7 3.4 V

VOL LOW Level VCC = Min, IOL = Max, VIL = Max, VIH = Min 0.35 0.5 V

Output Voltage IOL = 4 mA, VCC = Min 0.25 0.4

IIInput Current @ Max VCC = Max S or G 0.2 mA

Input Voltage VI = 7V A or B 0.1

IIH HIGH Level VCC = Max S or G 40 µA

Input Current VI = 2.7V A or B 20

IIL LOW Level VCC = Max S or G −0.8 mA

Input Current VI = 0.4V A or B −0.4

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

ICC Supply Current VCC = Max (Note 4) 9.7 16 mA

From (Input) RL = 2 kΩ

Symbol Parameter To (Output) CL = 15 pF CL = 50 pF Units

MinMaxMinMax

tPLH Propagation Delay Time Data to Y 14 18 ns

LOW-to-HIGH Level Output

tPHL Propagation Delay Time Data to Y 14 23 ns

HIGH-to-LOW Level Output

tPLH Propagation Delay Time Strobe to Y 20 24 ns

LOW-to-HIGH Level Output

tPHL Propagation Delay Time Strobe to Y 21 30 ns

HIGH-to-LOW Level Output

tPLH Propagation Delay Time Select to Y 23 28 ns

LOW-to-HIGH Level Output

tPHL Propagation Delay Time Select to Y 27 32 ns

HIGH-to-LOW Level Output

www.fairchildsemi.com 4

DM74LS157 • DM74LS158

DM74LS158 Recommended Operating Conditions

DM74LS158 Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted)

Note 5: All typic als are at VCC = 5V, TA = 25°C.

Note 6: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Note 7: ICC is meas ured wit h 4. 5V applied to all inputs and all output s OPEN.

DM74LS158 Switching Characteristics

at VCC = 5V and TA = 25°C

Symbol Parameter Min Nom Max Units

VCC Supply Voltage 4.75 5 5.25 V

VIH HIGH Level Input Voltage 2 V

VIL LOW Level Input Voltage 0.8 V

IOH HIGH Level Output Current −0.4 mA

IOL LOW Level Output Current 8 mA

TAFree Air Operating Temperature 0 70 °C

Symbol Parameter Conditions Min Typ Max Units

(Note 5)

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

VOH HIGH Level VCC = Min, IOH = Max 2.7 3.4 V

Output Voltage VIL = Max, VIH = Min

VOL LOW Level VCC = Min, IOL = Max 0.35 0.5

Output Voltage VIL = Max, VIH = Min V

IOL = 4 mA, VCC = Min 0.25 0.4

IIInput Current @ Max VCC = Max S or G 0.2 mA

Input V oltag e VI = 7V A or B 0.1

IIH HIGH Level VCC = Max S or G 40 µA

Input Current VI = 2.7V A or B 20

IIL LOW Level VCC = Max S or G −0.8 mA

Input Current VI = 0.4V A or B −0.4

IOS Short Circuit Output Current VCC = Max (Note 6) −20 −100 mA

ICC Supply Current VCC = Max (Note 7) 4.8 8 mA

From (Input) RL = 2 kΩ

Symbol Parameter To (Output) CL = 15 pF CL = 50 pF Units

Min Max Min Max

tPLH Propagation Delay Time Data to Y 12 18 ns

LOW-to-HIGH Level Output

tPHL Propagation Delay Time Data to Y 12 21 ns

HIGH-to-LOW Level Output

tPLH Propagation Delay Time Strobe to Y 17 23 ns

LOW-to-HIGH Level Output

tPHL Propagation Delay Time Strobe to Y 18 28 ns

HIGH-to-LOW Level Output

tPLH Propagation Delay Time Select to Y 20 24 ns

LOW-to-HIGH Level Output

tPHL Propagation Delay Time Select to Y 24 36 ns

HIGH-to-LOW Level Output

5 www.fairchildsemi.com

DM74LS157 • DM74LS158

Physical Dimensions inches (millimeters) unless otherwise noted

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

Package Number M16A

www.fairchildsemi.com 6

DM74LS157 • DM74LS158

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

16-Lead Sma ll Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

Package Number M16D

7 www.fairchildsemi.com

DM74LS157 • DM74LS158 Quad 2-Line to 1-Line Data Sele ctors/Multiplexers

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 licenses are implied and

Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

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to perform when properly used in accordance with

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sonably expected to result in a significant injury to the

user.

2. A criti cal com ponen t in any compo nent o f a l ife supp ort

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sonabl y e xpec ted to c ause th e fa i lure of the li fe s upp or t

device or system, or to affect its safety or effectiveness.