DM74ALS1240A FAIRCHILD | Alldatasheet

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Technical content

Features

■ Advanced oxide-isolated, ion-implanted Schottky TTL process ■ 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 ■ Low power dissipation version ■ Low level drive current: 74ALS = 16 mA 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 DM74ALS1240AWM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Input Output G AY LLH LHL HXZ

www.fairchildsemi.com 2 DM74ALS1240A 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 range (unless otherwise specified) Supply Voltage 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 78.0 °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 16 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 −1.2 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 I OL = 12 mA 0.25 0.4 V Output Voltage I OL = 24 mA 0.35 0.5 V II Input Current at Maximum VCC = 5.5V, VI = 7V 0.1 mA Input Voltage 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 VCC = 5.5V, VO = 2.7V 20 µA Output Current IOZL LOW Level 3-STATE VCC = 5.5V, VO = 0.4V −20 µA Output Current ICC Supply Current VCC = 5.5V Outputs HIGH 5 8 mA Outputs LOW 8 14 mA Outputs 3-STATE 8 13 mA

3 www.fairchildsemi.com DM74ALS1240A Switching Characteristics over recommended operating free air temperature range Symbol Parameter VCC = 4.5V to 5.5V, CL = 50 pF, Units From To R1 = 500Ω , R2 = 500Ω , (Input) (Output) TA = Min to Max Min Max tPLH Propagation Delay Time 21 3 n s LOW-to-HIGH Level Output AY tPHL Propagation Delay Time 21 3 n s HIGH-to-LOW Level Output tPZH Output Enable Time 42 0 n s to HIGH Level Output G Y tPZL Output Enable Time 62 2 n s to LOW Level Output tPHZ Output Disable Time 21 0 n s from HIGH Level Output G Y tPLZ Output Disable Time 31 3 n s from LOW Level Output

www.fairchildsemi.com 4 DM74ALS1240A Octal 3-STATE Bus Driver Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B 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