74LV138资料

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元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specification3-to-8 line decoder/demultiplexer; inverting74LV138FEATURESDESCRIPTION•Wide operating voltage: 1.0 to 5.5 VThe 74LV138 is a low-voltage Si-gate CMOS device that is pin and•Optimized for low voltage applications: 1.0 to 3.6 Vfunction compatible with 74HC/HCT138.•Accepts TTL input levels between VThe 74LV138 accepts three binary weighted address inputs (A0, A1,CC = 2.7 V and VCC = 3.6 VA•2) and when enabled, provide 8 mutually exclusive active LOWTypical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V, outputs (Y0 to Y7).Tamb = 25°C•The 74LV138 features three enable inputs: two active LOW (E1, andTypical VOHV (output VOH undershoot) > 2 V at VCC = 3.3 V, E2) and one active HIGH (E3). Every output will be HIGH unless E1Tamb = 25°Cand E2 are LOW and E3 is HIGH.•Demultiplexing capabilityThis multiple enable function allows easy parallel expansion of the•Multiple input enable for easy expansion74LV138 to a 1-of-32 (5 lines to 32 lines) decoder with just four•Ideal for memory chip select decoding74LV138 ICs and one inverter. The 74LV138 can be used as aneight output demultiplexer by using one of the active LOW enable•Active LOW mutually exclusive outputsinputs as the data input and the remaining enable inputs as strobes.•Output capability: standardUnused enable inputs must be permanently tied to their appropriate•active HIGH or LOW state. The 74LV138 is identical to the 74LV238ICC category: MSIbut has non-inverting (true) outputs.QUICK REFERENCE DATAGND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5 nsSYMBOLPARAMETERCONDITIONSTYPICALUNITPropagation delaytPHL/tPLHAn to Yn, CE3 to Yn, En to YnVL = 15 pF;CC = 3.3 V12ns14nsCIInput capacitance3.5pFCPDPower dissipation capacitance perVpackageCC = 3.3 VVI = GND to VCC145pFNOTES:1.CPPD is used to determine the dynamic power dissipation (P fD in µW)D = CPD × VCC2 ×i )ȍ (CL × VCC2 × fo) where:ffi = input frequency in MHz; CL = output load capacitance in pF;ȍo = output frequency in MHz; V (C VCC = supply voltage in V;L ×CC2 × fo) = sum of the outputs.ORDERING INFORMATIONPACKAGESTEMPERATURE RANGEOUTSIDE NORTH AMERICANORTH AMERICAPKG. DWG. #16-Pin Plastic DIL–40°C to +125°C74LV138 N74LV138 NSOT38-416-Pin Plastic SO–40°C to +125°C74LV138 D74LV138 DSOT109-116-Pin Plastic SSOP Type II–40°C to +125°C74LV138 DB74LV138 DBSOT338-116-Pin PlasticTSSOP Type I–40°C to +125°C74LV138 PW74LV138PW DHSOT403-1PIN CONFIGURATIONPIN DESCRIPTIONA01PIN NUMBERSYMBOLFUNCTION16VCC1, 2, 3AA0 to A2Address inputs1215Y04, 5E1 to E2Enable inputs (active LOW)A2314Y16E3Enable inputs (active HIGH)E1413Y215, 14, 13, 12,E11, 10, 9, 7Y0 to Y7Outputs2512Y38GNDGround (0 V)E3611Y416VCCPositive supply voltageY7710Y5GNDY6SV005241998 Apr 282853–1903 19290元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specification3-to-8 line decoder/demultiplexer; inverting74LV138LOGIC DIAGRAMLOGIC SYMBOL (IEEE/IEC)1ADXX0Y015015Y0152A1Y11410114111143A2Y2132G0721322213Y3123231234312Y4114114114E1Y5104&5104&5105E2E3Y696569569YEN77677677SV00525(a)(b)SV00526FUNCTIONAL DIAGRAMY015Y11A014Y2132A1Y33-to-8ENABLE123A2DECODEREXITINGY411Y510Y69Y77E145E2E63SV00527FUNCTION TABLEINPUTSOUTPUTSE1E2E3A0A1A2Y0Y1Y2Y3Y4Y5Y6Y7HXXXXXHHHHHHHHXHXXXXHHHHHHHHXXLXXXHHHHHHHHLLHLLLLHHHHHHHLLHHLLHLHHHHHHLLHLHLHHLHHHHHLLHHHLHHHLHHHHLLHLLHHHHHLHHHLLHHLHHHHHHLHHLLHLHHHHHHHHLHLLHHHHHHHHHHHLNOTES:H=HIGH voltage levelL=LOW voltage levelX=don’t care1998 Apr 283元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specification3-to-8 line decoder/demultiplexer; inverting74LV138RECOMMENDED OPERATING CONDITIONSSYMBOLPARAMETERCONDITIONSMINTYPMAXUNITVCCDC supply voltageSee Note 11.03.35.5VVIInput voltage0–VCCVVOOutput voltage0–VCCVTambOperating ambient temperature range in free airSee DC and AC–40+85characteristics–40+125°CVCC = 1.0V to 2.0V––500tr, tfInput rise and fall timesV––200VCC = 2.0V to 2.7V––100ns/VVCC = 2.7V to 3.6VCC = 3.6V to 5.5V––50NOTE:1.The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V.ABSOLUTE MAXIMUM RATINGS1, 2In accordance with the Absolute Maximum Rating System (IEC 134).Voltages are referenced to GND (ground = 0 V).SYMBOLPARAMETERCONDITIONSRATINGUNITVCCDC supply voltage–0.5 to +7.0V\"IIKDC input diode currentVI < –0.5 or VI > VCC + 0.5V20mA\"IOKDC output diode currentVO < –0.5 or VO > VCC + 0.5V50mA\"IODC output source or sink current– standard outputs–0.5V < VO < VCC + 0.5V25mA\"DC VCC or GND current for types with\"IGND,ICC– standard outputs50mATstgStorage temperature range–65 to +150°CPower dissipation per packagefor temperature range: –40 to +125°CPTOT– plastic DILabove +70°C derate linearly with 12 mW/K750– plastic mini-pack (SO)above +70°C derate linearly with 8 mW/K500mW– plastic shrink mini-pack (SSOP and TSSOP)above +60°C derate linearly with 5.5 mW/K400NOTES:1.Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of thedevice at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure toabsolute-maximum-rated conditions for extended periods may affect device reliability.2.The input and output voltage ratings may be exceeded if the input and output current ratings are observed.1998 Apr 284元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specification3-to-8 line decoder/demultiplexer; inverting74LV138DC ELECTRICAL CHARACTERISTICSOver recommended operating conditions. Voltages are referenced to GND (ground = 0 V).LIMITSSYMBOLPARAMETERTEST CONDITIONS-40°C to +85°C -40°C to +125°CUNITMINTYP1MAXMINMAXVCC = 1.2 V0.90.9VCC = 2.0 V1.41.4IHHIGH level InputVvoltageVCC = 2.7 to 3.6 V2.02.0VVCC = 4.5 to 5.5 V0.7Philips Semiconductors

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