MC74VHCT244A Octal Bus Buffer/Line Driver with 3-State Outputs The MC74VHCT244A is an advanced high speed CMOS octal bus buffer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. http://onsemi.com The MC74VHCT244A is a noninverting 3−state buffer, and has two active−low output enables. This device is designed to be used with 3−state memory address drivers, etc. MARKING The VHCT inputs are compatible with TTL levels. This device can DIAGRAMS be used as a level converter for interfacing 3.3 V to 5.0 V, because it 20 has full 5.0 V CMOS level output swings. The VHCT244A input and output (when disabled) structures VHCT244A provide protection when voltages between 0 V and 5.5 V are applied, 1 SOIC−20WB AWLYYWWG regardless of the supply voltage. These input and output structures SUFFIX DW help prevent device destruction caused by supply voltage−input/ CASE 751D 1 output voltage mismatch, battery backup, hot insertion, etc. Features 20 • High Speed: t = 5.6 ns (Typ) at V = 5.0 V VHCT PD CC • Low Power Dissipation: ICC = 4.0 (cid:2)A (Max) at TA = 25°C A2L4Y4WA(cid:2) • 1 TSSOP−20 (cid:2) TTL−Compatible Inputs: V = 0.8 V; V = 2.0 V IL IH SUFFIX DT • Power Down Protection Provided on Inputs and Outputs CASE 948E 1 • Balanced Propagation Delays • Designed for 4.5 V to 5.5 V Operating Range A = Assembly Location • WL, L = Wafer Lot Low Noise: V = 1.1 V (Max) OLP YY, Y = Year • Pin and Function Compatible with Other Standard Logic Families WW, W = Work Week • G or (cid:2) = Pb−Free Package Latchup Performance Exceeds 300 mA (Note: Microdot may be in either location) • ESD Performance: Human Body Model > 2000 V; Machine Model > 200 V ORDERING INFORMATION • Chip Complexity: 112 FETs or 28 Equivalent Gates See detailed ordering and shipping information in the package • dimensions section on page 4 of this data sheet. NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable • These Devices are Pb−Free and are RoHS Compliant © Semiconductor Components Industries, LLC, 2014 1 Publication Order Number: May, 2014 − Rev. 9 MC74VHCT244A/D

MC74VHCT244A 2 18 A1 YA1 4 16 A2 YA2 6 14 A3 YA3 8 12 A4 YA4 DATA NONINVERTING INPUTS 11 9 OUTPUTS B1 YB1 13 7 B2 YB2 15 5 B3 YB3 17 3 B4 YB4 1 OUTPUT OEA 19 ENABLES OEB Figure 1. Logic Diagram OEA 1 20 VCC FUNCTION TABLE A1 2 19 OEB Inputs Outputs YB4 3 18 YA1 OEA, OEB A, B YA, YB A2 4 17 B4 L L L L L L H H H H YB3 5 16 YA2 H X Z Z Z A3 6 15 B3 YB2 7 14 YA3 A4 8 13 B2 YB1 9 12 YA4 GND 10 11 B1 Figure 2. Pin Assignment http://onsemi.com 2

MC74VHCT244A ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ MAXIMUM RATINGS ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol Parameter Value Unit This device contains protection ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ circuitry to guard against damage VCC DC Supply Voltage –0.5 to +7.0 V ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ due to high static voltages or electric Vin DC Input Voltage –0.5 to +7.0 V fields. However, precautions must ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ be taken to avoid applications of any ÎÎÎÎVoÎÎut ÎÎÎÎDCÎÎ OuÎÎtputÎÎ VoltÎÎageÎÎÎÎÎÎÎÎHOÎÎiugthp ÎÎuotr iLnoÎÎ 3w− SSÎÎttaatteeÎÎÎΖÎÎ0.–50 t.ÎÎo5 VtoC ÎÎ+C7 +.0 ÎÎ0.5 ÎÎÎÎVÎÎ vvoollttaaggee sh tiog htheirs t hhiagnh −mimaxpiemduamnc rea tceird- ÎÎÎÎIIÎÎK ÎÎÎÎInÎÎput DÎÎiodeÎÎ CuÎÎrrentÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ−20ÎÎÎÎÎÎÎÎmÎÎA cuit. For proper operation, Vin and ÎÎÎÎIOÎÎK ÎÎÎÎOÎÎutpuÎÎt DioÎÎde CÎÎurreÎÎnt (VÎÎOUTÎÎ < GÎÎND; ÎÎVOUÎÎT > VÎÎCC)ÎÎÎÎÎÎÎÎÎα20ÎÎÎÎÎÎÎÎmÎÎA Vraonugt es hGoNuDld (cid:2)be ( Vcino nosr tVraoiunt)e d(cid:2) t Vo CtCh.e ÎÎÎÎIoÎÎut ÎÎÎÎDCÎÎ OuÎÎtputÎÎ CurÎÎrent,ÎÎ per ÎÎPinÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎα25ÎÎÎÎÎÎÎÎmÎÎA Unused inputs must always be tied to an appropriate logic voltage ÎÎÎÎICÎÎC ÎÎÎÎDCÎÎ SuÎÎpplyÎÎ CurÎÎrent,ÎÎ VCCÎÎ andÎÎ GNÎÎD PÎÎins ÎÎÎÎÎÎÎÎÎÎÎÎÎα75ÎÎÎÎÎÎÎÎmÎÎA level (e.g., either GND or VCC). ÎÎPÎD ÎÎPoÎwerÎ DissÎipatÎion iÎn StiÎll AirÎ, ÎÎSOICÎ PaÎckagÎes†ÎÎÎÎ500ÎÎÎÎmWÎ Unused outputs must be left open. ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎTÎÎSSOÎÎP PÎÎackaÎÎge†ÎÎÎÎÎÎÎÎ450ÎÎÎÎÎÎÎÎÎÎ ÎÎTsÎtg ÎÎStÎoragÎe TeÎmpeÎratuÎre ÎÎÎÎÎÎÎÎÎΖ65Î to +Î150ÎÎΰCÎ Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. †Derating − SOIC Packages: – 7 mW/°C from 65° to 125°C TSSOP Package: − 6.1 mW/°C from 65° to 125°C ÎRÎECÎOMÎÎMEÎNDEÎD OÎPEÎRATÎINGÎ COÎNDÎITIOÎNSÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎSymÎÎbolÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎPÎÎaramÎÎeteÎÎr ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎMinÎÎÎÎÎÎMÎÎax ÎÎÎÎUnÎÎit ÎÎÎÎVCÎÎC ÎÎÎÎDCÎÎ SuÎÎpplyÎÎ VoltÎÎageÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ4.5ÎÎÎÎÎÎ5ÎÎ.5 ÎÎÎÎVÎÎ ÎÎÎÎVÎÎin ÎÎÎÎDCÎÎ InpÎÎut VÎÎoltagÎÎe ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎÎÎÎÎ5ÎÎ.5 ÎÎÎÎVÎÎ ÎÎVoÎut ÎÎDCÎ OuÎtputÎ VoltÎageÎÎÎÎÎOÎutpÎut inÎ 3−SÎtateÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎÎ5Î.5 ÎÎVÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎHÎÎigh ÎÎor LoÎÎw SÎÎtateÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎÎÎÎÎVCÎÎC ÎÎÎÎÎÎ ÎÎÎÎTÎÎA ÎÎÎÎOÎÎperaÎÎting ÎÎTemÎÎperaÎÎtureÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ−40ÎÎÎÎÎÎ+1ÎÎ25 ÎÎÎΰCÎÎ ÎÎtr,Î tf ÎÎInÎput RÎise Îand ÎFall ÎTimeÎÎÎÎVCÎC = 5Î.0 VÎ ± 0Î.5 VÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎÎ2Î0 ÎÎnsÎ/V ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ DC ELECTRICAL CHARACTERISTICS ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎVCCÎÎÎÎÎÎÎTÎÎÎÎA = 2ÎÎÎÎ5°CÎÎÎÎÎÎÎÎTÎÎÎA =ÎÎÎ − 40ÎÎÎÎ to 8ÎÎÎ5°CÎÎÎÎÎTÎÎÎA = ÎÎÎÎ85 toÎÎÎ 12ÎÎÎ5°CÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol Parameter Test Conditions V Min Typ Max Min Max Min Max Unit ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ VIH Minimum High−Level 4.5 to 2.0 2.0 2.0 V ÎÎÎÎÎÎÎÎÎÎInÎÎput VÎÎoltaÎÎge ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ5.5ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎVÎIL ÎÎMÎaximÎum ÎLowÎ−LevÎel ÎÎÎÎÎÎÎÎ4Î.5 toÎÎÎÎÎÎÎÎ0.8ÎÎÎÎÎÎ0Î.8 ÎÎÎÎÎÎ0Î.8 ÎÎVÎ Input Voltage 5.5 ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ VOH Minimum High−Level IOH = −50 (cid:2)A 4.5 4.4 4.5 4.4 4.4 V ÎÎÎÎÎOÎutpuÎt VolÎtageÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎVÎÎin = VÎÎIH oÎÎr VILÎÎÎÎÎÎÎÎÎÎÎÎIOHÎÎ = −ÎÎ8 mAÎÎÎÎÎÎ4.5ÎÎÎÎ3ÎÎ.94 ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ3.8ÎÎ0 ÎÎÎÎÎÎÎÎÎÎÎÎ3.66ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎVOÎL ÎÎMOÎuatxpimuÎtu Vmo lÎLtaogweÎ−LevÎel ÎÎÎÎÎÎÎIOÎÎL = 5ÎÎ0 (cid:2)AÎÎÎÎÎÎ4.5ÎÎÎÎÎÎÎÎÎÎ0.0ÎÎÎÎÎÎ0.1ÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎ.1 ÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎ.1 ÎÎÎÎVÎÎ ÎÎÎÎÎÎÎÎÎÎVÎÎin = VÎÎIH oÎÎr VILÎÎÎÎÎÎÎÎÎÎÎÎIOÎÎL = ÎÎ8 mAÎÎÎÎÎÎ4.5ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ0.36ÎÎÎÎÎÎÎÎÎÎÎÎ0ÎÎ.44ÎÎÎÎÎÎÎÎÎÎÎÎ0.ÎÎ52 ÎÎÎÎÎÎ ÎÎIÎin ÎÎMÎaximÎum ÎInpuÎt ÎÎÎVinÎ = 5.Î5 V Îor GÎNDÎÎÎ0 toÎÎÎÎÎÎÎα0.1ÎÎÎÎÎαÎ1.0ÎÎÎÎÎα1Î.0 ÎÎ(cid:2)ÎA Leakage Current 5.5 ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ IOZ Maximum 3−State Vin = VIL or VIH 5.5 ±0.25 ±2.5 2.5 (cid:2)A ÎÎÎÎÎÎÎÎÎÎLeÎÎakaÎÎge CÎÎurreÎÎnt ÎÎÎÎÎÎVouÎÎt = VÎÎCC ÎÎor GÎÎND ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎICÎC ÎÎMÎaximÎum ÎQuieÎscenÎt ÎÎVinÎ = VÎCC oÎr GNÎD ÎÎÎ5.5ÎÎÎÎÎÎÎÎ4.0ÎÎÎÎÎÎ4Î0.0ÎÎÎÎÎÎ40Î.0 ÎÎ(cid:2)ÎA Supply Current ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ICCT Quiescent Supply Per Input: VIN =3.4 V 5.5 1.35 1.50 1.65 mA ÎÎÎÎÎCÎurrenÎt ÎÎÎÎÎOthÎer IÎnputÎ: VCCÎ orÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ GND ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎIOÎPD ÎÎOÎutpuÎt LeaÎkagÎe ÎÎÎVOÎUT =Î 5.5 ÎV ÎÎÎÎ0 ÎÎÎÎÎÎÎÎ0.5ÎÎÎÎÎÎ5Î.0 ÎÎÎÎÎÎ1Î0 ÎÎ(cid:2)ÎA Current ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ http://onsemi.com 3

MC74VHCT244A ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3.0 ns) ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ TA = 25°C TA = − 40 to 85°C TA = 85 to 125°C ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol Parameter Test Conditions Min Typ Max Min Max Min Max Unit ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ tPLH, Maximum VCC = 5.0 ± 0.5 V CL = 15 pF 5.4 7.4 1.0 8.5 11.0 9.5 ns ÎÎtPÎHL ÎÎPÎropaÎgatioÎn DeÎlayÎÎÎÎÎÎÎCÎL = 5Î0 pFÎÎÎÎÎ5.9ÎÎÎ8.4ÎÎÎ1.0ÎÎÎ9Î.5 ÎÎÎ1.0ÎÎÎ10Î.5 ÎÎÎ A to YA or B to YB ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎtPÎZL, ÎÎOÎutpuÎt EnÎable ÎTimeÎÎÎVCÎC = 5Î.0 ±Î 0.5 ÎV CÎL = 1Î5 pFÎÎÎÎÎ7.7ÎÎÎ10.4ÎÎÎ1.0ÎÎÎ1Î2.0ÎÎÎ1.0ÎÎÎ13Î.5 ÎÎnÎs tPZH OEA to YA or OEB to RL = 1 k(cid:3) CL = 50 pF 8.2 11.4 1.0 13.0 1.0 14.5 ÎÎÎÎÎÎÎÎÎÎYÎÎB ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎtPLÎZ, ÎÎOÎutpuÎt DisÎableÎ TimÎe ÎÎVCÎC = 5Î.0 ±Î 0.5 ÎV CÎL = 5Î0 pFÎÎÎÎÎ8.8ÎÎÎ11.4ÎÎÎ1.0ÎÎÎ1Î3.0ÎÎÎ1.0ÎÎÎ14Î.5 ÎÎnÎs tPHZ OEA to YA or OEB to RL = 1 k(cid:3) ÎÎÎÎÎÎÎÎÎÎYÎÎB ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎtOSÎLH,ÎÎOÎutpuÎt to OÎutpÎut ÎÎÎVCÎC = 5Î.0 ±Î 0.5 ÎV CÎL = 5Î0 pFÎÎÎÎÎÎÎÎ1.0ÎÎÎÎÎÎ1Î.0 ÎÎÎÎÎÎ1Î.0 ÎÎnÎs ÎÎtOSÎHL ÎÎSÎkewÎÎÎÎÎÎ(NoÎte 1Î) ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3.0 ns) Typical @ 25°C, VCC = 5.0 V Symbol Parameter Min Typ Max Unit CPD Power Dissipation Capacitance (Note 2) 18 pF ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Cin Maximum Input Capacitance 4 10 pF ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Cout Maximum Three−State Output Capacitance (Output in High−Impedance State) 9 pF Î1Î. PÎaramÎÎeterÎ guaÎranteÎed bÎy deÎsignÎ. tOSÎLH =Î |tPLÎHm −Î tPLÎHn|, ÎtOSHÎL = |ÎtPHLÎm − tÎPHLnÎ|. ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ 2. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC(OPR) = CPD (cid:2) VCC (cid:2) fin + ICC/8 (per bit). CPD is used to determine the no−load dynamic power consumption; PD = CPD (cid:2) VCC2 (cid:2) fin + ICC (cid:2) VCC. NOISE CHARACTERISTICS (Input tr = tf = 3.0 ns, CL = 50 pF, VCC = 5.0 V) TA = 25°C Symbol Parameter Typ Max Unit VOLP Quiet Output Maximum Dynamic VOL 0.9 1.1 V VOLV Quiet Output Minimum Dynamic VOL −0.9 −1.1 V VIHD Minimum High Level Dynamic Input Voltage 2.0 V VILD Maximum Low Level Dynamic Input Voltage 0.8 V ORDERING INFORMATION Device Package Shipping† MC74VHCT244ADWRG SOIC−20WB 1000 / Tape & Reel (Pb−Free) MC74VHCT244ADTG 75 Units / Rail TSSOP−20 MC74VHCT244ADTRG 2500 / Tape & Reel (Pb−Free) NLV74VHCT244ADTRG* 2500 / Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable. http://onsemi.com 4

MC74VHCT244A 3 V A or B 1.5 V GND tPLH tPHL VOH YA or YB 1.5 V VOL Figure 3. Switching Waveform 3 V OEA or OEB 1.5 V GND tPZL tPLZ HIGH IMPEDANCE YA or YB 1.5 V VOL +0.3 V tPZH tPHZ VOH -0.3 V YA or YB 1.5 V HIGH IMPEDANCE Figure 4. Switching Waveform TEST POINT OUTPUT DEVICE UNDER TEST CL* *Includes all probe and jig capacitance Figure 5. Test Circuit TEST POINT OUTPUT 1 k(cid:3) CTEOSNTNINEGCT tP TLOZ AVNCDC WtPZHLE.N DEVICE CONNECT TO GND WHEN UNDER TESTING tPHZ AND tPZH. TEST CL* *Includes all probe and jig capacitance Figure 6. Test Circuit http://onsemi.com 5

MC74VHCT244A PACKAGE DIMENSIONS TSSOP−20 CASE 948E−02 ISSUE C NOTES: 20X K REF K 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 0.15 (0.006) T U S 0.10 (0.004) M T U S V S K1 2. CONTROLLING DIMENSION: ÍÍÍÍ MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE 20 11 J JÍ1 ÍÍÍ BURRS. MOLD FLASH OR GATE BURRS 2X L/2 SHALL NOT EXCEED 0.15 (0.006) PER SIDE. ÍÍÍÍ 4. DIMENSION B DOES NOT INCLUDE B SECTION N−N INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION L −U− SHALL NOT EXCEED 0.25 (0.010) PER SIDE. PIN 1 5. DIMENSION K DOES NOT INCLUDE IDENT 0.25 (0.010) DAMBAR PROTRUSION. ALLOWABLE N DAMBAR PROTRUSION SHALL BE 0.08 1 10 (0.003) TOTAL IN EXCESS OF THE K DIMENSION AT MAXIMUM MATERIAL M CONDITION. 6. TERMINAL NUMBERS ARE SHOWN FOR 0.15 (0.006) T U S REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE A DETERMINED AT DATUM PLANE −W−. N MILLIMETERS INCHES −V− F DIM MIN MAX MIN MAX A 6.40 6.60 0.252 0.260 DETAIL E B 4.30 4.50 0.169 0.177 C --- 1.20 --- 0.047 D 0.05 0.15 0.002 0.006 F 0.50 0.75 0.020 0.030 −W− G 0.65 BSC 0.026 BSC C H 0.27 0.37 0.011 0.015 J 0.09 0.20 0.004 0.008 J1 0.09 0.16 0.004 0.006 D G H K 0.19 0.30 0.007 0.012 DETAIL E K1 0.19 0.25 0.007 0.010 0.100 (0.004) ML 06 (cid:3).40 BSC8 (cid:3) 00 (cid:3).252 BSC8 (cid:3) −T− SEATING PLANE SOLDERING FOOTPRINT 7.06 1 0.65 PITCH 16X 16X 0.36 1.26 DIMENSIONS: MILLIMETERS http://onsemi.com 6

MC74VHCT244A PACKAGE DIMENSIONS SOIC−20 WB DW SUFFIX CASE 751D−05 ISSUE G D NOTES: A (cid:2) 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD M 20 11 PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. B (cid:3) 5. DIMENSION B DOES NOT INCLUDE DAMBAR H M 45 PROTRUSION. ALLOWABLE PROTRUSION 10X 0.25 E hX SDCHIOMANELDNLI STBIIOEO NN0.. 1A3T TMOATXAILM IUNM E MXCATEESRSI AOLF B 1 10 MILLIMETERS DIM MIN MAX A 2.35 2.65 A1 0.10 0.25 20X B B B 0.35 0.49 C 0.23 0.32 0.25 M T A S B S D 12.65 12.95 E 7.40 7.60 e 1.27 BSC H 10.05 10.55 h 0.25 0.75 A L 0.50 0.90 (cid:2) 0 (cid:3) 7 (cid:3) L SEATING 18X e A1 TPLANE C ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free ON Semiconductor Website: www.onsemi.com Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 5163, Denver, Colorado 80217 USA Europe, Middle East and Africa Technical Support: Order Literature: http://www.onsemi.com/orderlit Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Phone: 421 33 790 2910 Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Japan Customer Focus Center For additional information, please contact your local Email: orderlit@onsemi.com Phone: 81−3−5817−1050 Sales Representative http://onsemi.com MC74VHCT244A/D 7

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: O N Semiconductor: MC74VHCT244ADTG MC74VHCT244ADTRG MC74VHCT244ADWRG