DM74ALS244A FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

■ Advanced low power oxide-isolated ion-implanted Schottky TTL process ■ Functional and pin compatible with the 74LS counterpart ■ Improved switching performance with less power dissi- pation compared with the 74LS counterpart ■ Switching response specified into 500Ω and 50 pF load ■ Switching response specifications guaranteed over full temperature and VCC supply range ■ PNP input design reduces input loading Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table H = HIGH Level Logic State L = LOW Level Logic State X = Don't Care (Either LOW or HIGH Level Logic State) Z = High Impedance (OFF) State Logic Diagram Order Number Package Number Package Description DM74ALS244AWM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide DM74ALS244ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74ALS244AMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide DM74ALS244AN N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Input Output G AY LL L LH H HX Z

www.fairchildsemi.com 2 DM74ALS244A Absolute Maximum Ratings(Note 1) Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature (unless otherwise specified) Switching Characteristics over recommended operating free-air temperature range Supply Voltage, VCC 7V Input Voltage 7V Voltage Applied to Disabled Output 5.5V Operating Free Air Temperature Range 0 °C to +70°C Storage Temperature Range −65°C to +150°C Typical θ JA N Package 60.5 °C/W M Package 79.8 °C/W Symbol Parameter Min Typ Max Units VCC Supply Voltage 4.5 5 5.5 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −15 mA IOL LOW Level Output Current 24 mA TA Operating Free-Air Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units VIK Input Clamp Voltage V CC = 4.5V, II = −18 mA −1.5 V VOH HIGH Level V CC = 4.5V to 5.5V I OH = −0.4 mA V CC −2V Output Voltage V CC = 4.5V I OH = −3 mA 2.4 V IOH = Max 2 V VOL LOW Level V CC = 4.5V 0.35 0.5 V Output Voltage I OL = 24 mA II Input Current at Maximum Input Voltage VCC = 5.5V, VI = 7V 0.1 mA IIH HIGH Level Input Current V CC = 5.5V, VI = 2.7V 20 µA IIL LOW Level Input Current V CC = 5.5V, VIL = 0.4V −0.1 mA IO Output Drive Current V CC = 5.5V, VO = 2.25V −30 −112 mA IOZH HIGH Level 3-STATE Output Current VCC = 5.5V, VO = 2.7V 20 µA IOZL LOW Level 3-STATE Output Current V CC = 5.5V, VO = 0.4V −20 µA ICC Supply Current V CC = 5.5V 91 5 m A Outputs HIGH Outputs LOW 15 24 mA Outputs 3-STATE 17 27 mA Symbol Parameter Conditions From (Input) To (Output) Min Max Units tPLH Propagation Delay Time V CC = 4.5V to 5.5V, A Y 3 10 ns LOW-to-HIGH Level Output C L = 50 pF, tPHL Propagation Delay Time R1 = 500Ω , A Y 3 10 ns HIGH-to-LOW Level Output R2 = 500Ω , tPZH Output Enable Time to HIGH Level Output TA = Min to Max G Y 3 20 ns tPZL Output Enable Time to LOW Level Output G Y 3 20 ns tPHZ Output Disable Time from HIGH Level Output G Y 2 10 ns tPLZ Output Disable Time from LOW Level Output G Y 1 13 ns

3 www.fairchildsemi.com DM74ALS244A Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B

www.fairchildsemi.com 4 DM74ALS244A Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20D

5 www.fairchildsemi.com DM74ALS244A Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide

www.fairchildsemi.com 6 DM74ALS244A Octal 3-STATE Bus Driver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N20A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com