MC74HC244A Octal 3-State Noninverting Buffer/Line Driver/ Line Receiver High–Performance Silicon–Gate CMOS The MC74HC244A is identical in pinout to the LS244. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This octal noninverting buffer/line driver/line receiver is designed to be used with 3–state memory address drivers, clock drivers, and other bus–oriented systems. The device has noninverting outputs and two active–low output enables. The HC244A is similar in function to the HC240A. • • • • • • • Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2 to 6 V Low Input Current: 1 µA High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 136 FETs or 34 Equivalent Gates http://onsemi.com MARKING DIAGRAMS 20 PDIP–20 N SUFFIX CASE 738 20 MC74HC244AN AWLYYWW 1 20 1 20 1 SOIC WIDE–20 DW SUFFIX CASE 751D HC244A AWLYYWW 1 HC 244A ALYW TSSOP–20 DT SUFFIX CASE 948G 20 1 1 LOGIC DIAGRAM A1 A2 A3 A4 DATA INPUTS B1 B2 B3 B4 OUTPUT ENABLES 2 18 4 16 6 14 8 12 11 9 13 7 15 5 17 3 A WL YY WW YA1 YA2 = Assembly Location = Wafer Lot = Year = Work Week PIN ASSIGNMENT YA3 ENABLE A 1 20 VCC YA4 YB1 NONINVERTING OUTPUTS YB2 YB3 YB4 A1 2 19 ENABLE B YB4 3 18 YA1 A2 4 17 B4 YB3 5 16 YA2 A3 6 15 B3 YB2 7 14 YA3 A4 8 13 B2 YB1 9 12 YA4 GND 10 11 B1 PIN 20 = VCC PIN 10 = GND 1 ENABLE A 19 ENABLE B ORDERING INFORMATION FUNCTION TABLE Inputs Enable A, Enable B Device Outputs MC74HC244AN A, B L L L H H X Z = high impedance Semiconductor Components Industries, LLC, 2000 March, 2000 – Rev. 8 20 YA, YB L H Z 1 Package Shipping PDIP–20 1440 / Box MC74HC244ADW SOIC–WIDE 38 / Rail MC74HC244ADWR2 SOIC–WIDE 1000 / Reel MC74HC244ADT TSSOP–20 75 / Rail MC74HC244ADTR2 TSSOP–20 2500 / Reel Publication Order Number: MC74HC244A/D MC74HC244A ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎ MAXIMUM RATINGS* Symbol VCC Parameter DC Supply Voltage (Referenced to GND) Value Unit – 0.5 to + 7.0 V Vin DC Input Voltage (Referenced to GND) – 0.5 to VCC + 0.5 V Vout DC Output Voltage (Referenced to GND) – 0.5 to VCC + 0.5 V DC Input Current, per Pin ± 20 mA Iout DC Output Current, per Pin ± 35 mA ICC DC Supply Current, VCC and GND Pins ± 75 mA PD Power Dissipation in Still Air, 750 500 450 mW Tstg Storage Temperature – 65 to + 150 _C Iin TL Plastic DIP† SOIC Package† TSSOP Package† This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, Vin and Vout should be constrained to the range GND (Vin or Vout) VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. v v _C Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP, SOIC, SSOP or TSSOP Package) 260 *Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. †Derating — Plastic DIP: – 10 mW/_C from 65_ to 125_C SOIC Package: – 7 mW/_C from 65_ to 125_C TSSOP Package: – 6.1 mW/_C from 65_ to 125_C For high frequency or heavy load considerations, see Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D). ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎ ÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ v ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ v ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ v ÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ RECOMMENDED OPERATING CONDITIONS Symbol VCC Vin, Vout Parameter Min Max Unit 2.0 6.0 V 0 VCC V – 55 + 125 _C 0 0 0 1000 500 400 ns DC Supply Voltage (Referenced to GND) DC Input Voltage, Output Voltage (Referenced to GND) TA Operating Temperature, All Package Types tr, tf Input Rise and Fall Time (Figure 1) VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) Guaranteed Limit Symbol Parameter Test Conditions VCC V – 55 to 25_C 85_C 125_C Unit VIH Minimum High–Level Input Voltage Vout = VCC – 0.1 V |Iout| 20 µA 2.0 3.0 4.5 6.0 1.5 2.1 3.15 4.2 1.5 2.1 3.15 4.2 1.5 2.1 3.15 4.2 V VIL Maximum Low–Level Input Voltage Vout = 0.1 V |Iout| 20 µA 2.0 3.0 4.5 6.0 0.5 0.9 1.35 1.8 0.5 0.9 1.35 1.8 0.5 0.9 1.35 1.8 V Minimum High–Level Output Voltage Vin = VIH |Iout| 20 µA 2.0 4.5 6.0 1.9 4.4 5.9 1.9 4.4 5.9 1.9 4.4 5.9 V 3.0 4.5 6.0 2.48 3.98 5.48 2.34 3.84 5.34 2.2 3.7 5.2 2.0 4.5 6.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 3.0 4.5 6.0 0.26 0.26 0.26 0.33 0.33 0.33 0.4 0.4 0.4 VOH Vin = VIH VOL Maximum Low–Level Output Voltage |Iout| |Iout| |Iout| 2.4 mA 6.0 mA 7.8 mA Vin = VIL |Iout| 20 µA Vin = VIL |Iout| |Iout| |Iout| 2.4 mA 6.0 mA 7.8 mA http://onsemi.com 2 V MC74HC244A ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ v v ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎ v v ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎ ÎÎÎÎ ÎÎÎ DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) Guaranteed Limit Symbol Parameter Test Conditions VCC V – 55 to 25_C 85_C 125_C Unit Maximum Input Leakage Current Vin = VCC or GND 6.0 ± 0.1 ± 1.0 ± 1.0 µA IOZ Maximum Three–State Leakage Current Output in High–Impedance State Vin = VIL or VIH Vout = VCC or GND 6.0 ± 0.5 ± 5.0 ± 10 µA ICC Maximum Quiescent Supply Current (per Package) Vin = VCC or GND Iout = 0 µA 6.0 4.0 40 160 µA Iin NOTE: Information on typical parametric values and high frequency or heavy load considerations can be found in Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D). AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns) Guaranteed Limit Symbol Parameter VCC V – 55 to 25_C 85_C 125_C Unit tPLH, tPHL Maximum Propagation Delay, A to YA or B to YB (Figures 1 and 3) 2.0 3.0 4.5 6.0 96 50 18 15 115 60 23 20 135 70 27 23 ns tPLZ, tPHZ Maximum Propagation Delay, Output Enable to YA or YB (Figures 2 and 4) 2.0 3.0 4.5 6.0 110 60 22 19 140 70 28 24 165 80 33 28 ns tPZL, tPZH Maximum Propagation Delay, Output Enable to YA or YB (Figures 2 and 4) 2.0 3.0 4.5 6.0 110 60 22 19 140 70 28 24 165 80 33 28 ns tTLH, tTHL Maximum Output Transition Time, Any Output (Figures 1 and 3) 2.0 3.0 4.5 6.0 60 23 12 10 75 27 15 13 90 32 18 15 ns Maximum Input Capacitance — 10 10 10 pF Maximum Three–State Output Capacitance (Output in High–Impedance State) — 15 15 15 pF Cin Cout NOTE: For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D). Typical @ 25°C, VCC = 5.0 V CPD Power Dissipation Capacitance (Per Buffer)* 34 pF * Used to determine the no–load dynamic power consumption: P D = C PD V CC 2 f + I CC V CC . For load considerations, see Chapter 2 of the ON Semiconductor High–Speed CMOS Data Book (DL129/D). http://onsemi.com 3 MC74HC244A SWITCHING WAVEFORMS tr tf DATA INPUT A OR B VCC VCC 90% 50% 10% ENABLE A OR B GND tPLH 50% GND tPHL 90% 50% 10% OUTPUT YA OR YB tPZH tTHL HIGH IMPEDANCE 50% OUTPUT Y tTLH tPLZ tPZL OUTPUT Y tPHZ 10% VOL 90% VOH 50% Figure 1. HIGH IMPEDANCE Figure 2. TEST CIRCUITS TEST POINT TEST POINT OUTPUT DEVICE UNDER TEST OUTPUT DEVICE UNDER TEST CL* *Includes all probe and jig capacitance 1 kΩ CL* CONNECT TO VCC WHEN TESTING tPLZ AND tPZL. CONNECT TO GND WHEN TESTING tPHZ AND tPZH. *Includes all probe and jig capacitance Figure 3. Test Circuit Figure 4. Test Circuit PIN DESCRIPTIONS INPUTS function as noninverting buffers. When a high level is applied, the outputs assume the high impedance state. A1, A2, A3, A4, B1, B2, B3, B4 (Pins 2, 4, 6, 8, 11, 13, 15, 17) OUTPUTS Data input pins. Data on these pins appear in noninverted form on the corresponding Y outputs, when the outputs are enabled. YA1, YA2, YA3, YA4, YB1, YB2, YB3, YB4 (Pins 18, 16, 14, 12, 9, 7, 5, 3) Device outputs. Depending upon the state of the output–enable pins, these outputs are either noninverting outputs or high–impedance outputs. CONTROLS Enable A, Enable B (Pins 1, 19) Output enables (active–low). When a low level is applied to these pins, the outputs are enabled and the devices http://onsemi.com 4 MC74HC244A LOGIC DETAIL TO THREE OTHER A OR B INVERTERS ONE OF 8 INVERTERS VCC DATA INPUT A OR B YA OR YB ENABLE A OR ENABLE B http://onsemi.com 5 MC74HC244A PACKAGE DIMENSIONS PDIP–20 N SUFFIX PLASTIC DIP PACKAGE CASE 738–03 ISSUE E –A– 20 11 1 10 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. B L C –T– K SEATING PLANE M N E G F J D 20 PL 0.25 (0.010) 20 PL 0.25 (0.010) M T A M T B M M DIM A B C D E F G J K L M N INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 0_ 15 _ 0.020 0.040 MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0_ 15_ 0.51 1.01 SO–20 DW SUFFIX CASE 751D–05 ISSUE F q A 20 X 45 _ M E h 0.25 1 10 20X B B 0.25 M T A S B S A L H 10X NOTES: 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. 11 B M D 18X e A1 SEATING PLANE DIM A A1 B C D E e H h L q C T http://onsemi.com 6 MILLIMETERS MIN MAX 2.35 2.65 0.10 0.25 0.35 0.49 0.23 0.32 12.65 12.95 7.40 7.60 1.27 BSC 10.05 10.55 0.25 0.75 0.50 0.90 0_ 7_ MC74HC244A PACKAGE DIMENSIONS 20X 0.15 (0.006) T U TSSOP–20 DT SUFFIX CASE 948E–02 ISSUE A K REF 0.10 (0.004) S M T U S V S K K1 2X L/2 20 ÍÍÍÍ ÍÍÍÍ ÍÍÍÍ 11 J J1 B –U– L PIN 1 IDENT SECTION N–N 1 10 0.25 (0.010) N 0.15 (0.006) T U S NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. DIMENSION K DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN EXCESS OF THE K DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. TERMINAL NUMBERS ARE SHOWN FOR REFERENCE ONLY. 7. DIMENSION A AND B ARE TO BE DETERMINED AT DATUM PLANE –W–. M A –V– N F DETAIL E –W– C D G H DETAIL E 0.100 (0.004) –T– SEATING PLANE http://onsemi.com 7 DIM A B C D F G H J J1 K K1 L M MILLIMETERS MIN MAX 6.40 6.60 4.30 4.50 ––– 1.20 0.05 0.15 0.50 0.75 0.65 BSC 0.27 0.37 0.09 0.20 0.09 0.16 0.19 0.30 0.19 0.25 6.40 BSC 0_ 8_ INCHES MIN MAX 0.252 0.260 0.169 0.177 ––– 0.047 0.002 0.006 0.020 0.030 0.026 BSC 0.011 0.015 0.004 0.008 0.004 0.006 0.007 0.012 0.007 0.010 0.252 BSC 0_ 8_ MC74HC244A ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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