MC74HC157A identical pinout LS157. device inputs compatible with stand
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MC74HC157A Quad 2-Input Data Selectors Multiplexers
MC74HC157A identical pinout LS157. device inputs compatible with standard CMOS outputs; with pullup resistors, they compatible with LSTTL outputs. This device routes nibbles single port determined Select input. data presented outputs noninverted form. high level Output Enable input sets four outputs level.
Output Drive Capability: LSTTL Loads Outputs Directly Interface CMOS, NMOS, Operating Voltage Range: Input Current: High Noise Immunity Characteristic CMOS Devices Compliance with Requirements Defined JEDEC Standard Chip Complexity: FETs 20.5 Equivalent Gates
LOGIC DIAGRAM
NIBBLE INPUTS NIBBLE INPUTS DATA OUTPUTS
PDIP-16 SUFFIX CASE
MC74HC157AN AWLYYWW
SO-16 SUFFIX CASE 751B
HC157A AWLYWW
TSSOP-16 SUFFIX CASE 948F Assembly Location Wafer Year Work Week 157A ALYW
ASSIGNMENT
SELECT OUTPUT ENABLE
SELECT OUTPUT ENABLE
FUNCTION TABLE
Inputs Output Enable Select Outputs
ORDERING INFORMATION
Device MC74HC157AN MC74HC157AD MC74HC157ADR2 MC74HC157ADT MC74HC157ADTR2 Package PDIP-16 SOIC-16 SOIC-16 TSSOP-16 TSSOP-16 Shipping 2000 Rail 2500 Reel Rail 2500 Reel
don't care levels respective Data-Word Inputs.
Semiconductor Components Industries, LLC, 2000
March, 2000 Rev.
Publication Order Number: MC74HC157A/D
MC74HC157A
MAXIMUM RATINGS*
Symbol Parameter Value Unit Supply Voltage (Referenced GND) Input Voltage (Referenced GND) Vout Output Voltage (Referenced GND) Input Current, Iout Output Current, Supply Current, Pins Power Dissipation Still Air, Plastic SOIC Package TSSOP Package Tstg Storage Temperature
This device contains protection circuitry guard against damage high static voltages electric fields. However, precautions must taken avoid applications voltage higher than maximum rated voltages this high-impedance circuit. proper operation, Vout should constrained range (Vin Vout) VCC. Unused inputs must always tied appropriate logic voltage level (e.g., either VCC). Unused outputs must left open.
Lead Temperature, from Case Seconds (Plastic DIP, SOIC TSSOP Package)
*Maximum Ratings those values beyond which damage device occur. Functional operation should restricted Recommended Operating Conditions. Derating Plastic DIP: mW/_C from 125_C SOIC Package: mW/_C from 125_C TSSOP Package: mW/_C from 125_C high frequency heavy load considerations, Chapter Semiconductor High-Speed CMOS Data Book (DL129/D).
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Unit
Supply Voltage (Referenced GND) Input Voltage, Output Voltage (Referenced GND)
Vin, Vout
Operating Temperature, Package Types Input Rise Fall Time (Figure
1000
ELECTRICAL CHARACTERISTICS (Voltages Referenced GND)
Guaranteed Limit
Symbol
Parameter
Test Conditions
25_C 3.15 1.35
85_C 125_C
3.15 1.35 3.15 1.35
Unit
Minimum High-Level Input Voltage
Vout |Iout|
Maximum Low-Level Input Voltage
Vout |Iout|
Minimum High-Level Output Voltage
|Iout|
|Iout| |Iout| |Iout|
2.48 3.98 5.48
2.34 3.84 5.34
Maximum Low-Level Output Voltage
|Iout|
|Iout| |Iout| |Iout|
0.26 0.26 0.26
0.33 0.33 0.33
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MC74HC157A
ELECTRICAL CHARACTERISTICS (Voltages Referenced GND)
Guaranteed Limit Symbol Parameter Test Conditions 25_C
85_C 125_C
Unit
Maximum Input Leakage Current Maximum Three-State Leakage Current
Output High-Impedance State Vout Iout
Maximum Quiescent Supply Current (per Package)
NOTE: Information typical parametric values found Chapter Semiconductor High-Speed CMOS Data Book (DL129/D).
ELECTRICAL CHARACTERISTICS Input
Guaranteed Limit
Symbol tPLH, tPHL
Parameter
25_C
85_C 125_C
Unit
Maximum Propagation Delay, Input Output (Figures
tPLH, tPHL
Maximum Propagation Delay, Select Output (Figures
tPLH, tPHL
Maximum Propagation Delay, Output Enable Output (Figures
tTLH, tTHL
Maximum Output Transition Time, Output (Figures
Maximum Input Capacitance
NOTE: propagation delays with loads other than information typical parametric values, Chapter Semiconductor High-Speed CMOS Data Book (DL129/D). Typical 25°C,
Power Dissipation Capacitance (Per Package)*
Used determine no-load dynamic power consumption: load considerations, Chapter Semiconductor High-Speed CMOS Data Book (DL129/D).
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MC74HC157A
DESCRIPTIONS
INPUTS (Pins
Nibble inputs. data present these pins transferred outputs when Select input level Output Enable input level. data presented outputs noninverted form.
(Pins
data present these pins noninverted form. Output Enable input high level, outputs level.
CONTROL INPUTS Select (Pin
Nibble inputs. data present these pins transferred outputs when Select input high level Output Enable input level. data presented outputs noninverted form.
OUTPUTS (Pins
Nibble select. This input determines data word transferred outputs. level this input selects inputs high level selects inputs.
Output Enable (Pin
Output Enable input. level this input allows selected input data presented outputs. high level this input sets outputs level.
Data outputs. selected input Nibble presented these outputs when Output Enable input level. SWITCHING WAVEFORMS
INPUT tPLH OUTPUT tTLH tTHL tPHL SELECT tPLH OUTPUT tTLH tTHL tPHL
Figure HC157A
OUTPUT ENABLE tPHL OUTPUT tTHL
Figure versus Select, Noninverted
tPLH
tTLH
Figure HC157A
TEST POINT OUTPUT DEVICE UNDER TEST
*Includes probe capacitance
Figure Test Circuit
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MC74HC157A
EXPANDED LOGIC DIAGRAM
NIBBLE OUTPUTS OUTPUT ENABLE SELECT DATA OUTPUTS
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MC74HC157A
PACKAGE DIMENSIONS
PDIP-16 SUFFIX CASE 648-08 ISSUE
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: INCH. DIMENSION CENTER LEADS WHEN FORMED PARALLEL. DIMENSION DOES INCLUDE MOLD FLASH. ROUNDED CORNERS OPTIONAL. INCHES MILLIMETERS 0.740 0.770 18.80 19.55 0.250 0.270 6.85 6.35 0.145 0.175 4.44 3.69 0.015 0.021 0.53 0.39 0.040 0.070 1.77 1.02 0.100 2.54 0.050 1.27 0.008 0.015 0.38 0.21 0.110 0.130 3.30 2.80 0.295 0.305 7.74 7.50 0.020 0.040 1.01 0.51
0.25 (0.010)
SEATING PLANE
SOIC-16 SUFFIX CASE 751B-05 ISSUE
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSIONS INCLUDE MOLD PROTRUSION. MAXIMUM MOLD PROTRUSION 0.15 (0.006) SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.127 (0.005) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. MILLIMETERS 9.80 10.00 4.00 3.80 1.75 1.35 0.49 0.35 1.25 0.40 1.27 0.25 0.19 0.25 0.10 6.20 5.80 0.50 0.25 INCHES 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 0.008 0.009 0.004 0.009 0.229 0.244 0.010 0.019
0.25 (0.010)
SEATING
PLANE
0.25 (0.010)
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MC74HC157A
PACKAGE DIMENSIONS
TSSOP-16 SUFFIX CASE 948F-01 ISSUE
0.10 (0.004) 0.15 (0.006)
IDENT.
SECTION
0.25 (0.010) 0.15 (0.006)
DETAIL
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSION DOES INCLUDE MOLD FLASH. PROTRUSIONS GATE BURRS. MOLD FLASH GATE BURRS SHALL EXCEED 0.15 (0.006) SIDE. DIMENSION DOES INCLUDE INTERLEAD FLASH PROTRUSION. INTERLEAD FLASH PROTRUSION SHALL EXCEED 0.25 (0.010) SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.08 (0.003) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. TERMINAL NUMBERS SHOWN REFERENCE ONLY. DIMENSION DETERMINED DATUM PLANE -W-. MILLIMETERS 4.90 5.10 4.30 4.50 1.20 0.05 0.15 0.50 0.75 0.65 0.18 0.28 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 INCHES 0.193 0.200 0.169 0.177 0.047 0.002 0.006 0.020 0.030 0.026 0.007 0.011 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252
0.10 (0.004) SEATING
PLANE
DETAIL
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MC74HC157A
Semiconductor trademarks Semiconductor Components Industries, (SCILLC). SCILLC reserves right make changes without further notice products herein. SCILLC makes warranty, representation guarantee regarding suitability products particular purpose, does SCILLC assume liability arising application product circuit, specifically disclaims liability, including without limitation special, consequential incidental damages. "Typical" parameters which provided SCILLC data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. SCILLC does convey license under patent rights rights others. SCILLC products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure SCILLC product could create situation where personal injury death occur. Should Buyer purchase SCILLC products such unintended unauthorized application, Buyer shall indemnify hold SCILLC officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that SCILLC negligent regarding design manufacture part. SCILLC Equal Opportunity/Affirmative Action Employer.
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MC74HC157A/D
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