Dual 1-of-4 Decoder with 3-State Output
Description
The HD74AC539 contains two inpedendent decoders. Each accepts two Address (A0, A1) input signals anddecodes them to select one of four mutually exclusive outputs. A polarity control input (P) determineswhether the outputs are active HIGH (P = L) or active LOW (P = H). An active LOW input Enable (E) isavailable for data demultiplexing; data is routed to the selected output in non-inverted form in the activeLOW mode or in inverted form in the active HIGH mode. A HIGH signal on the active LOW OutputEnable (OE) input forces the 3-state outputs to the high impedance state.
Feature
• Outputs Source/Sink 24 mA
HD74AC539
Pin Arrangement
O2b1O1b2O0b3Pb4OEb5A0a6A1a7O3a8O2a9GND10(Top view)20VCC19O3b18A1b17A0b16Eb15Ea14OEa13Pa12O0d11O1aLogic Symbol
PEA0A1EPA0A1DECODER aOEO0O1O2O3OEDECODER bO0O1O2O32
HD74AC539
Pin Names
A0a to A1aA0b to A1bEa – EbOEa, OEbPa, Pb
O0a to O3aO0b to O3b
Side A Address InputsSide B Address Inputs
Enable Inputs (Active LOW)
Output Enable Inputs (Active LOW)Polarity Control InputsSide A 3-State OutputsSide B 3-State Outputs
Truth Table
Function
High impedanceDisable
Active HIGH output
(P=L)
InputsOEHLLLLL
Active LOW output(P=H)
LLLL
HLXZ
::::
High Voltage LevelLow Voltage LevelImmaterial
High Impedance
EXHLLLLLLLL
A1XXLLHHLLHH
A0XXLHLHLHLH
OutputsO0ZOn = PHLLLLHHH
LHLLHLHH
LLHLHHLH
LLLHHHHL
O1Z
O2Z
O3Z
3
HD74AC539
Logic Diagram (one half shown)
A1A0EPOEO0O1O2O3Please note that this diagram is provided only for the understanding of logic operations and should not beused to estimate propagation delays.DC Characteristics (unless otherwise specified)
Item
Maximum quiescent supply currentMaximum quiescent supply current
SymbolICCICC
Max808.0
UnitµAµA
Condition
VIN = VCC or ground, VCC = 5.5 V,Ta = Worst case
VIN = VCC or ground, VCC = 5.5 V,Ta = 25°C
4
HD74AC539
AC Characteristics: HD74AC539
Ta = +25°CCL = 50 pF
Item
Propagation delayAn to On
Propagation delayAn to On
Propagation delayE to On
Propagation delayE to On
Propagation delayP to On
Propagation delayP to On
Propagation delayOE to On
Propagation delayOE to On
Propagation delayOE to On
Propagation delayOE to OnNote:
tLZtHZtZLtZHtPHLtPLHtPHLtPLHtPHLSymboltPLH
VCC (V)*13.35.03.35.03.35.03.35.03.35.03.35.03.35.03.35.03.35.03.35.0
Min1.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.0
Typ————————————————————
Max15.010.015.010.014.59.513.59.016.011.516.011.510.08.09.57.511.59.510.58.5
Ta = –40°C to +85°CCL = 50 pFMin1.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.01.0
Max18.012.018.012.016.511.015.511.519.012.519.012.511.59.011.08.513.010.512.09.5
nsnsnsnsnsnsnsnsnsUnitns
1.Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Capacitance
Item
Input capacitance
Power dissipation capacitance
SymbolCINCPD
Typ4.560
UnitpFpF
ConditionVCC = 5.5 VVCC = 5.0 V
5
元器件交易网www.cecb2b.com
24.50 25.40 Max 2011 7.00 Max6.30Unit: mm
10.891.27 Max 1.30102.54 Min5.08 Max7.620.51 Min2.54 ± 0.250.48 ± 0.100.25– 0.050° – 15°+ 0.11Hitachi CodeJEDECEIAJ
Weight (reference value)DP-20N—
Conforms1.26 g
元器件交易网www.cecb2b.comUnit: mm
12.6 13 Max 20115.51100.80 MaxxaM 02.201.271.0 ± *0.42 ± 0.0801.0.40 ± 0.0600.150.12 M*Dimension including the plating thicknessBase material dimension54007.80+ 0.20..– 0.3000 ±± 201.1522..00*0° – 8°0.70 ± 0.20Hitachi CodeFP-20DAJEDEC—EIAJConformsWeight (reference value)0.31 g元器件交易网www.cecb2b.com12.8Unit: mm
13.2 Max201105.7110xaM 0.935 Max56.201.271.0 ± 0*0.42 ± 0.082.0.40 ± 0.0600.150.12M*Dimension including the plating thicknessBase material dimension5410.40+ 0.25– 0.4000..00 ±±1.45 7522..00*0° – 8°0.70+ 0.57– 0.30Hitachi CodeFP-20DBJEDECConformsEIAJ—Weight (reference value)0.52 g元器件交易网www.cecb2b.com
Unit: mm
6.506.80 Max201104.41100.65*0.22+0.08–0.070.20 ± 0.060.13M0.65 MaxxaM 0.1001.1*Dimension including the plating thickness
Base material dimension1.06.40 ± 0.20540° – 8°340.50 ± 0.100000....0000+– ±±7 075.110..00*Hitachi CodeTTP-20DAJEDEC—EIAJ
—Weight (reference value)0.07 g
Cautions
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copyright, trademark, or other intellectual property rights for information contained in this document.Hitachi bears no responsibility for problems that may arise with third party’s rights, includingintellectual property rights, in connection with use of the information contained in this document.2.Products and product specifications may be subject to change without notice. Confirm that you havereceived the latest product standards or specifications before final design, purchase or use.
3.Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,contact Hitachi’s sales office before using the product in an application that demands especially highquality and reliability or where its failure or malfunction may directly threaten human life or cause riskof bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,traffic, safety equipment or medical equipment for life support.
4.Design your application so that the product is used within the ranges guaranteed by Hitachi particularlyfor maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when usedbeyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeablefailure rates or failure modes in semiconductor devices and employ systemic measures such as fail-safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or otherconsequential damage due to operation of the Hitachi product.5.This product is not designed to be radiation resistant.
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7.Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductorproducts.
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