Product Folder Sample & Buy Support & Community Tools & Software Technical Documents SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 SNx4HC244 Octal Buffers and Line Drivers With 3-State Outputs 1 Features 3 Description • • The SNx4HC244 octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The SNx4HC244 devices are organized as two 4-bit buffers and drivers with separate outputenable (OE) inputs. When OE is low, the device passes noninverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. 1 • • • • • • Wide Operating Voltage Range of 2 V to 6 V High-Current Outputs Drive Up to 15 LSTTL Loads 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Low Power Consumption: ICC, 80-µA (Maximum) Typical tpd = 11 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA (Maximum) On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters. 2 Applications • • • • • • Servers LED Displays Network Switches Telecom Infrastructure Motor Drivers I/O Expanders Device Information(1) PART NUMBER PACKAGE (PINS) BODY SIZE (NOM) CDIP (20) 6.92 mm × 24.38 mm CFP (20) 6.92 mm × 13.72 mm LCCC (20) 8.89 mm × 8.89 mm SN74HC244DB SSOP (20) 5.30 mm × 7.25 mm SN74HC244DW SOIC (20) 7.50 mm × 12.80 mm SN74HC244N PDIP (20) 6.30 mm × 25.40 mm SN74HC244NS SOP (20) 5.30 mm × 12.60 mm SN74HC244PW TSSOP (20) 4.40 mm × 6.50 mm SN54HC244 (1) For all available packages, see the orderable addendum at the end of the data sheet. Logic Diagram (Positive Logic) 2OE 19 1OE 1 2 18 1Y1 2A1 4 16 1Y1 2A2 6 14 1Y1 2A3 8 12 1Y4 2A4 1A1 1A2 1A3 1A4 11 9 1Y1 13 7 1Y1 15 5 1Y1 17 3 1Y4 Copyright © 2016, Texas Instruments Incorporated 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 4 4 4 5 5 5 6 6 7 7 8 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Electrical Characteristics – SN54HC244 .................. Electrical Characteristics – SN74HC244 .................. Switching Characteristics .......................................... Switching Characteristics – CL = 50 pF .................... Switching Characteristics – CL = 150 pF ................ Typical Characteristic.............................................. Parameter Measurement Information .................. 9 Detailed Description ............................................ 11 8.1 8.2 8.3 8.4 9 Overview ................................................................ Functional Block Diagram ....................................... Feature Description................................................. Device Functional Modes ....................................... 11 11 11 11 Application and Implementation ........................ 12 9.1 Application Information............................................ 12 9.2 Typical Application .................................................. 12 10 Power Supply Recommendations ..................... 13 11 Layout................................................................... 13 11.1 Layout Guidelines ................................................. 13 11.2 Layout Example .................................................... 13 12 Device and Documentation Support ................. 14 12.1 12.2 12.3 12.4 12.5 Related Links ........................................................ Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 14 14 14 14 14 13 Mechanical, Packaging, and Orderable Information ........................................................... 14 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision D (August 2003) to Revision E Page • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .................................................................................................. 1 • Added Military Disclaimer to Features section ....................................................................................................................... 1 • Added Applications section .................................................................................................................................................... 1 • Removed Ordering Information table ..................................................................................................................................... 1 • Added Device Information table ............................................................................................................................................. 1 2 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 5 Pin Configuration and Functions DB, DW, J, N, NS, PW, W Package 20-Pin SSOP, SOIC, CDIP, PDIP, SOP, TSSOP, or CFP Top View 1Y2 1A3 6 15 2A3 2Y2 7 14 1Y3 1A4 8 13 2A2 2Y1 9 12 1Y4 GND 10 11 2A1 2OE 16 19 5 4 18 1Y1 2Y3 5 17 2A4 1A3 6 16 1Y2 2Y2 7 15 2A3 1A4 8 14 1Y3 13 2Y3 1A2 2A2 2A4 VCC 17 20 4 12 1A2 1Y4 1Y1 1OE 18 1 3 11 2Y4 2A1 2OE 1A1 19 2 2 10 1A1 GND VCC 2Y4 20 9 1 2Y1 1OE 3 FK Package 20-Pin LCCC Top View Pin Functions PIN NO. NAME 1 1OE 2 3 I/O DESCRIPTION I Output Enable 1A1 I Input 2Y4 O Output 4 1A2 I Input 5 2Y3 O Output 6 1A3 I Input 7 2Y2 O Output 8 1A4 I Input 9 2Y1 O Output 10 GND — Ground 11 2A1 I Input 12 1Y4 O Output 13 2A2 I Input 14 1Y3 O Output 15 2A3 I Input 16 1Y2 O Output 17 2A4 I Input 18 1Y1 O Output 19 2OE I Output Enable 20 VCC — Power Pin Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback 3 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) Supply voltage range, VCC MIN MAX UNIT –0.5 7 V (2) Input clamp current, IIK VI < 0 or VI > VCC ±20 mA Output clamp current, IOK VO < 0 or VO > VCC (2) ±20 mA Continuous output current, IO VO = 0 or VCC ±35 mA Continuous current through VCC or GND ±70 mA Junction Temperature, TJ 150 °C 150 °C Storage temperature, Tstg (1) (2) –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 6.2 ESD Ratings SN74HC244 V(ESD) (1) (2) Electrostatic discharge VALUE Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) UNIT ±2000 Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) V ±1000 JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) VCC Supply voltage VCC = 2 V VIH High-level input voltage MIN NOM MAX 2 5 6 VCC = 4.5 V 3.15 V 4.2 VCC = 2 V Low-level input voltage 0.5 VCC = 4.5 V 1.35 VCC = 6 V VI Input voltage VO Output voltage Cpd TA (1) 4 Input transition rise and fall time 0 0 VCC V VCC V 1000 VCC = 4.5 V 500 VCC = 6 V 400 Power dissipation capacitance per buffer or driver (no load) Operating free-air temperature V 1.8 VCC = 2 V Δt/Δv V 1.5 VCC = 6 V VIL UNIT 35 ns/V pF SN54HC244 –55 125 SN74HC244 –40 85 °C All unused inputs of the device must be held at VCC or GND to ensure proper device operation. See the Texas Instruments application report, Implications of Slow or Floating CMOS Inputs, SCBA004. Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 6.4 Thermal Information SN54HC244, SN74HC244 THERMAL METRIC (1) DB (SSOP) DW (SOIC) N (PDIP) NS (SOP) PW (TSSOP) 20 PINS 20 PINS 20 PINS 20 PINS 20 PINS UNIT RθJA Junction-to-ambient thermal resistance 89.5 76.8 44.9 71.9 97.5 °C/W RθJC(top) Junction-to-case (top) thermal resistance 50.9 42.2 30.9 38.2 32.6 °C/W RθJB Junction-to-board thermal resistance 44.6 44.6 25.8 39.3 48.4 °C/W ψJT Junction-to-top characterization parameter 17 15.6 16.4 14.9 1.7 °C/W ψJB Junction-to-board characterization parameter 44.2 44.1 25.7 39 47.9 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 6.5 Electrical Characteristics TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –20 µA VOH VI = VIH or VIL TYP 1.9 1.998 VCC = 4.5 V 4.4 4.499 5.9 5.999 IOH = –6 mA, VCC = 4.5 V VCC = 6 V 3.98 4.3 IOH = –7.8 mA, VCC = 6 V 5.48 5.8 MAX UNIT V VCC = 2 V 0.002 0.1 VCC = 4.5 V 0.001 0.1 VCC = 6 V 0.001 0.1 IOL = 6 mA, VCC = 4.5 V 0.17 0.26 IOL = 7.8 mA, VCC = 6 V 0.15 0.26 ±0.1 ±100 nA ±0.01 ±0.5 µA 8 µA 3 10 pF TYP MAX IOL = 20 µA VOL MIN VCC = 2 V VI = VIH or VIL II VI = VCC or 0, VCC = 6 V IOZ VO = VCC or 0, VI = VIH or VIL, VCC = 6 V ICC VI = VCC or 0, IO = 0, VCC = 6 V Ci VCC = 2 V to 6 V V 6.6 Electrical Characteristics – SN54HC244 over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –20 µA VOH VI = VIH or VIL MIN VCC = 2 V 1.9 VCC = 4.5 V 4.4 VCC = 6 V 5.9 IOH = –6 mA, VCC = 4.5 V IOL = 20 µA VI = VIH or VIL 5.2 VCC = 2 V 0.1 VCC = 4.5 V 0.1 VCC = 6 V 0.1 IOL = 6 mA, VCC = 4.5 V IOL = 7.8 mA, VCC = 6 V II VI = VCC or 0, VCC = 6 V IOZ V 3.7 IOH = –7.8 mA, VCC = 6 V VOL UNIT V 0.4 0.4 ±1000 nA VO = VCC or 0, VI = VIH or VIL, VCC = 6 V ±10 µA ICC VI = VCC or 0, IO = 0, VCC = 6 V 160 µA Ci VCC = 2 V to 6 V 10 pF Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback 5 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com 6.7 Electrical Characteristics – SN74HC244 over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –20 µA VOH VI = VIH or VIL MIN VCC = 2 V 1.9 VCC = 4.5 V 4.4 VCC = 6 V IOH = –6 mA, VCC = 4.5 V VOL VI = VIH or VIL MAX 5.9 UNIT V 3.84 IOH = –7.8 mA, VCC = 6 V IOL = 20 µA TYP 5.34 VCC = 2 V 0.1 VCC = 4.5 V 0.1 VCC = 6 V 0.1 IOL = 6 mA, VCC = 4.5 V 0.33 IOL = 7.8 mA, VCC = 6 V 0.33 V II VI = VCC or 0, VCC = 6 V ±1000 nA IOZ VO = VCC or 0, VI = VIH or VIL, VCC = 6 V ±5 µA ICC VI = VCC or 0, IO = 0, VCC = 6 V 80 µA Ci VCC = 2 V to 6 V 10 pF 6.8 Switching Characteristics TA = 25°C (unless otherwise noted; see Figure 2) PARAMETER TEST CONDITIONS VCC = 2 V tpd From A (input) to Y (output) VCC = 4.5 V VCC = 6 V VCC = 2 V ten From OE (input) to Y (output) VCC = 4.5 V VCC = 6 V tdis From OE (input) to Y (output) To Y (output) Submit Documentation Feedback MAX 40 115 CL = 150 pF 56 165 CL = 50 pF 13 23 CL = 150 pF 18 33 CL = 50 pF 11 20 CL = 150 pF 15 28 CL = 50 pF 75 150 CL = 150 pF 100 200 CL = 50 pF 15 30 CL = 150 pF 20 40 CL = 50 pF 13 26 CL = 150 pF 17 34 CL = 50 pF 75 150 VCC = 4.5 V CL = 50 pF 15 30 VCC = 6 V CL = 50 pF 13 26 CL = 50 pF 28 60 CL = 150 pF 45 210 CL = 50 pF 8 12 CL = 150 pF 17 42 CL = 50 pF 6 10 CL = 150 pF 13 36 VCC = 4.5 V VCC = 6 V 6 MIN VCC = 2 V VCC = 2 V tt TYP CL = 50 pF UNIT ns ns ns ns Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 6.9 Switching Characteristics – CL = 50 pF over recommended operating free-air temperature range (unless otherwise noted; see Figure 2) PARAMETER TEST CONDITIONS VCC = 2 V tpd From A (input) to Y (output) VCC = 4.5 V VCC = 6 V VCC = 2 V ten From OE (input) to Y (output) VCC = 4.5 V VCC = 6 V VCC = 2 V tdis From OE (input) to Y (output) VCC = 4.5 V VCC = 6 V VCC = 2 V tt To Y (output) VCC = 4.5 V VCC = 6 V MIN TYP MAX SN54HC244 170 SN74HC244 145 SN54HC244 34 SN74HC244 29 SN54HC244 29 SN74HC244 25 SN54HC244 225 SN74HC244 190 SN54HC244 45 SN74HC244 38 SN54HC244 38 SN74HC244 32 SN54HC244 225 SN74HC244 190 SN54HC244 45 SN74HC244 38 SN54HC244 38 SN74HC244 32 SN54HC244 90 SN74HC244 75 SN54HC244 18 SN74HC244 15 SN54HC244 15 SN74HC244 13 UNIT ns ns ns ns 6.10 Switching Characteristics – CL = 150 pF over recommended operating free-air temperature range (unless otherwise noted; see Figure 2) PARAMETER TEST CONDITIONS VCC = 2 V tpd From A (input) to Y (output) VCC = 4.5 V VCC = 6 V VCC = 2 V ten From OE (input) to Y (output) VCC = 4.5 V VCC = 6 V VCC = 2 V tt To Y (output) VCC = 4.5 V VCC = 6 V MIN TYP MAX SN54HC244 245 SN74HC244 210 SN54HC244 49 SN74HC244 42 SN54HC244 42 SN74HC244 35 SN54HC244 300 SN74HC244 250 SN54HC244 60 SN74HC244 50 SN54HC244 51 SN74HC244 43 SN54HC244 315 SN74HC244 265 SN54HC244 63 SN74HC244 53 SN54HC244 53 SN74HC244 45 Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 UNIT Submit Documentation Feedback ns ns ns 7 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com 6.11 Typical Characteristic 60 50 tpd (ns) 40 30 20 10 CL 50pF CL 150pF 0 2 3 4 5 6 VCC (V) C001 Figure 1. Propagation Delay 8 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 7 Parameter Measurement Information VCC Test Point From Output Under Test S1 RL CL (see Note A) S2 Figure 2. Load Circuit VCC Input 50% 50% 0V tPLH In-Phase Output tPHL 50% 10% 90% VOH 50% 10% V OL tf 90% tr tPHL tPLH 90% Out-of-Phase Output 50% 10% 90% 50% 10% VOH VOL tf tr Figure 3. Propagation Delay and Output Transition Times Input 50% 10% 90% 90% VCC 50% 10% 0 V tr tf Figure 4. Input Rise and Fall Times Output Control (Low-Level Enabling) VCC 50% 50% 0V tPZL Output Waveform 1 (See Note B) tPLZ 10% tPZH Output Waveform 2 (See Note B) ≈VCC ≈VCC 50% VOL tPHZ 50% 90% VOH ≈0 V Figure 5. Enable and Disable Times for 3-State Outputs NOTE: A. CL includes probe and test-fixture capacitance. Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback 9 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com Parameter Measurement Information (continued) B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. D. The outputs are measured one at a time with one input transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. Table 1. Switching Information Table PARAMETER ten tdis RL CL S1 S2 tPZH 1 kΩ 50 pF or 150 pF Open Closed tPZL 1 kΩ 50 pF or 150 pF Closed Open tPHZ 1 kΩ 50 pF Open Closed tPLZ 1 kΩ 50 pF Closed Open — 50 pF or 150 pF Open Open tpd or tt 10 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 8 Detailed Description 8.1 Overview The SNx4HC244 device is organized as two 4-bit buffers and line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the currentsinking capability of the driver. 8.2 Functional Block Diagram 2OE 19 1OE 1 2 18 1Y1 2A1 4 16 1Y1 2A2 6 14 1Y1 2A3 8 12 1Y4 2A4 1A1 1A2 1A3 1A4 11 9 1Y1 13 7 1Y1 15 5 1Y1 17 3 1Y4 Copyright © 2016, Texas Instruments Incorporated 8.3 Feature Description The SNx4HC244 has a wide operating voltage of 2 V to 6 V. Inputs accept voltage levels up to VCC. This device has a low power consumption of ICC 80 µA (maximum). The SNx4HC244 device can drive ±6 mA at VCC of 5 V. 8.4 Device Functional Modes Table 2 lists the functions of the SNx4HC244. Table 2. Function Table (Each Buffer or Driver) INPUTS OUTPUT OE A Y L H H L L L H X Z Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback 11 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information SN74HC244 is a high-drive CMOS device that can be used for a multitude of bus interface type applications where output drive or PCB trace length is a concern. 9.2 Typical Application Regulated 3V SN74HC244 1OE x x x MCU or System Logic A1 x x x A4 VCC Y1 x x x Y4 MCU System Logic LEDS x x x GND Copyright © 2016, Texas Instruments Incorporated Figure 6. SN74HC244 Application Schematic 9.2.1 Design Requirements This device uses CMOS technology and has balanced output drive. Take care to avoid bus contention because it can drive currents that would exceed maximum limits. The high drive also creates fast edges into light loads so routing and load conditions should be considered to prevent ringing. 9.2.2 Detailed Design Procedure 1. Recommended input conditions: – For rise time and fall time specifications, see Δt/ΔV in Recommended Operating Conditions. – For specified high and low levels, see VIH and VIL in Recommended Operating Conditions. 2. Recommend output conditions: – Load currents should not exceed IO max per output and should not exceed the continuous current through VCC or GND total current for the part. These limits are located in Absolute Maximum Ratings. – Outputs should not be pulled above VCC. 12 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 SN54HC244, SN74HC244 www.ti.com SCLS130E – DECEMBER 1982 – REVISED MAY 2016 Typical Application (continued) 9.2.3 Application Curve 100 90 80 ten (ns) 70 60 50 40 30 20 10 CL 50pF CL 150pF 0 2 3 4 5 VCC (V) 6 C002 Figure 7. Enable Time 10 Power Supply Recommendations The power supply can be any voltage between the MIN and MAX supply voltage rating located in the Recommended Operating Conditions. Each VCC terminal should have a good bypass capacitor to prevent power disturbance. For devices with a single supply, TI recomments a 0.1-μF capacitor. If there are multiple VCC terminals, then TI recommends 0.01-μF or 0.022-μF capacitors for each power terminal. It is ok to parallel multiple bypass capacitors to reject different frequencies of noise. Multiple bypass capacitors may be paralleled to reject different frequencies of noise. The bypass capacitor should be installed as close to the power terminal as possible for the best results. 11 Layout 11.1 Layout Guidelines When using multiple bit logic devices, inputs should not float. In many cases, functions or parts of functions of digital logic devices are unused. Some examples are when only two inputs of a triple-input and gate are used, or when only 3 of the 4-buffer gates are used. Such input pins should not be left unconnected because the undefined voltages at the outside connections result in undefined operational states. Specified in Figure 8 are rules that must be observed under all circumstances. All unused inputs of digital logic devices must be connected to a high or low bias to prevent them from floating. The logic level that should be applied to any particular unused input depends on the function of the device. Generally they will be tied to GND or VCC, whichever makes more sense or is more convenient. 11.2 Layout Example VCC Input Unused Input Output Unused Input Output Input Figure 8. Layout Diagram Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback 13 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com 12 Device and Documentation Support 12.1 Related Links Table 3 lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 3. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY SN54HC244 Click here Click here Click here Click here Click here SN74HC244 Click here Click here Click here Click here Click here 12.2 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.3 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 12.4 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.5 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 14 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated Product Folder Links: SN54HC244 SN74HC244 PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) 5962-8409601VRA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 5962-8409601VR A SNV54HC244J 5962-8409601VSA ACTIVE CFP W 20 25 TBD A42 N / A for Pkg Type -55 to 125 5962-8409601VS A SNV54HC244W 84096012A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 84096012A SNJ54HC 244FK 8409601RA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 8409601RA SNJ54HC244J 8409601SA ACTIVE CFP W 20 1 TBD A42 N / A for Pkg Type -55 to 125 8409601SA SNJ54HC244W JM38510/65705B2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 JM38510/ 65705B2A JM38510/65705BRA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 JM38510/ 65705BRA JM38510/65705BSA ACTIVE CFP W 20 1 TBD A42 N / A for Pkg Type -55 to 125 JM38510/ 65705BSA M38510/65705B2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 JM38510/ 65705B2A M38510/65705BRA ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 JM38510/ 65705BRA M38510/65705BSA ACTIVE CFP W 20 1 TBD A42 N / A for Pkg Type -55 to 125 JM38510/ 65705BSA SN54HC244J ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 SN54HC244J SN74HC244ADBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI -40 to 85 SN74HC244APWLE OBSOLETE TSSOP PW 20 TBD Call TI Call TI -40 to 85 SN74HC244DBLE OBSOLETE SSOP DB 20 TBD Call TI Call TI -40 to 85 SN74HC244DBR ACTIVE SSOP DB 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244DBRG4 ACTIVE SSOP DB 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 10-Jun-2014 Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) SN74HC244DW ACTIVE SOIC DW 20 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244DWE4 ACTIVE SOIC DW 20 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244DWG4 ACTIVE SOIC DW 20 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244DWR ACTIVE SOIC DW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244DWRE4 ACTIVE SOIC DW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244DWRG4 ACTIVE SOIC DW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244N ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type -40 to 85 SN74HC244N SN74HC244N3 OBSOLETE PDIP N 20 TBD Call TI Call TI -40 to 85 SN74HC244NE4 ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type -40 to 85 SN74HC244N SN74HC244NSR ACTIVE SO NS 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244NSRG4 ACTIVE SO NS 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PW ACTIVE TSSOP PW 20 70 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PWE4 ACTIVE TSSOP PW 20 70 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PWG4 ACTIVE TSSOP PW 20 70 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PWLE OBSOLETE TSSOP PW 20 TBD Call TI Call TI -40 to 85 SN74HC244PWR ACTIVE TSSOP PW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PWRE4 ACTIVE TSSOP PW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PWRG4 ACTIVE TSSOP PW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 SN74HC244PWT ACTIVE TSSOP PW 20 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 HC244 Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 10-Jun-2014 Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) SN74HC244QDWRG4Q1 ACTIVE SOIC DW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM HC244Q SNJ54HC244FK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 84096012A SNJ54HC 244FK SNJ54HC244J ACTIVE CDIP J 20 1 TBD A42 N / A for Pkg Type -55 to 125 8409601RA SNJ54HC244J SNJ54HC244W ACTIVE CFP W 20 1 TBD A42 N / A for Pkg Type -55 to 125 8409601SA SNJ54HC244W (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Addendum-Page 3 Samples PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF SN54HC244, SN54HC244-SP, SN74HC244 : • Catalog: SN74HC244, SN54HC244 • Automotive: SN74HC244-Q1, SN74HC244-Q1 • Enhanced Product: SN74HC244-EP, SN74HC244-EP • Military: SN54HC244 • Space: SN54HC244-SP NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product • Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects • Enhanced Product - Supports Defense, Aerospace and Medical Applications • Military - QML certified for Military and Defense Applications • Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application Addendum-Page 4 PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2015 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74HC244DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74HC244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74HC244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74HC244DWRG4 SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74HC244DWRG4 SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74HC244NSR SO NS 20 2000 330.0 24.4 9.0 13.0 2.4 4.0 24.0 Q1 SN74HC244PWR TSSOP PW 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 Q1 SN74HC244PWT TSSOP PW 20 250 330.0 16.4 6.95 7.1 1.6 8.0 16.0 Q1 SN74HC244QDWRG4Q1 SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2015 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74HC244DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74HC244DWR SOIC DW 20 2000 600.0 144.0 84.0 SN74HC244DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74HC244DWRG4 SOIC DW 20 2000 367.0 367.0 45.0 SN74HC244DWRG4 SOIC DW 20 2000 367.0 367.0 45.0 SN74HC244NSR SO NS 20 2000 367.0 367.0 45.0 SN74HC244PWR TSSOP PW 20 2000 367.0 367.0 38.0 SN74HC244PWT TSSOP PW 20 250 367.0 367.0 38.0 SN74HC244QDWRG4Q1 SOIC DW 20 2000 367.0 367.0 45.0 Pack Materials-Page 2 PACKAGE OUTLINE DW0020A SOIC - 2.65 mm max height SCALE 1.200 SOIC C 10.63 TYP 9.97 SEATING PLANE PIN 1 ID AREA A 0.1 C 20 1 13.0 12.6 NOTE 3 18X 1.27 2X 11.43 10 11 B 7.6 7.4 NOTE 4 20X 0.51 0.31 0.25 C A B 2.65 MAX 0.33 TYP 0.10 SEE DETAIL A 0.25 GAGE PLANE 0 -8 0.3 0.1 1.27 0.40 DETAIL A TYPICAL 4220724/A 05/2016 NOTES: 1. All linear dimensions are in millimeters. Dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed 0.15 mm per side. 4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.43 mm per side. 5. Reference JEDEC registration MS-013. www.ti.com EXAMPLE BOARD LAYOUT DW0020A SOIC - 2.65 mm max height SOIC 20X (2) SYMM 1 20 20X (0.6) 18X (1.27) SYMM (R0.05) TYP 10 11 (9.3) LAND PATTERN EXAMPLE SCALE:6X SOLDER MASK OPENING METAL SOLDER MASK OPENING METAL UNDER SOLDER MASK 0.07 MAX ALL AROUND 0.07 MIN ALL AROUND SOLDER MASK DEFINED NON SOLDER MASK DEFINED SOLDER MASK DETAILS 4220724/A 05/2016 NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site. www.ti.com EXAMPLE STENCIL DESIGN DW0020A SOIC - 2.65 mm max height SOIC 20X (2) SYMM 1 20 20X (0.6) 18X (1.27) SYMM 11 10 (9.3) SOLDER PASTE EXAMPLE BASED ON 0.125 mm THICK STENCIL SCALE:6X 4220724/A 05/2016 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design. www.ti.com MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. Falls within JEDEC MO-150 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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