Revised February 2000 DM74ALS38A Quadruple 2-Input NAND Buffer with Open-Collector Outputs General Description Features This device contains four independent gates, each of which performs the logic NAND function. The open-collector outputs require external pull-up resistors for proper logical operation. ■ Switching specifications at 50 pF Pull-Up Resistor Equations ■ Switching specifications guaranteed over full temperature and VCC range ■ Advanced oxide-isolated, ion-implanted Schottky TTL process ■ Functionally and pin for pin compatible with LS TTL counterpart ■ Improved AC performance over LS38 ■ Improved line receiving characteristics Where: N1 (IOH) = total maximum output HIGH current for all outputs tied to pull-up resistor N2 (IIH) = total maximum input HIGH current for all inputs tied to pull-up resistor N3 (IIL) = total maximum input LOW current for all inputs tied to pull-up resistor Ordering Code: Order Number Package Number Package Description DM74ALS38AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74ALS38AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Y = AB Inputs Output A B Y L L H L H H H L H H H L H = HIGH Logic Level L = LOW Logic Level © 2000 Fairchild Semiconductor Corporation DS006193 www.fairchildsemi.com DM74ALS38A Quadruple 2-Input NAND Buffer with Open-Collector Outputs September 1986 DM74ALS38A Absolute Maximum Ratings(Note 1) Supply Voltage 7V Input Voltage 7V High Level Output Voltage 7V 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. 0°C to +70°C Operating Free Air Temperature Range −65°C to +150°C Storage Temperature Range Typical θJA N Package 83.0°C/W M Package 114.0°C/W Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.5 5 5.5 V VCC Supply Voltage VIH HIGH Level Input Voltage VIL LOW Level Input Voltage 0.8 V VOH HIGH Level Output Voltage 5.5 V IOL LOW Level Output Current 24 mA TA Free Air Operating Temperature 70 °C 2 V 0 Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. Symbol Parameter Conditions Min Typ Max Units VIK Input Clamp Voltage VCC = 4.5V, II = −18 mA −1.5 V IOH HIGH Level Output Current VCC = 4.5V, VOH = 5.5V 100 µA VOL LOW Level VCC = 4.5V Output Voltage VIH = 2V 0.5 V mA IOL = 24 mA 0.35 II Input Current at Maximum VCC = 5.5V, VIH = 7V 0.1 IIH HIGH Level Input Current VCC = 5.5V, VIH = 2.7V 20 µA IIL LOW Level Input Current VCC = 5.5V, VIL = 0.4V −0.1 mA ICCH Supply Current with Input Voltage Outputs HIGH ICCL Supply Current with Outputs LOW VCC = 5.5V, VI = 0V 0.86 1.6 mA VCC = 5.5V, VI = 4.5V 4.0 7.8 mA Min Max Units 10 33 ns 2 12 ns Switching Characteristics over recommended operating free air temperature range Symbol tPLH tPHL Parameter Conditions Propagation Delay Time VCC = 4.5V to 5.5V LOW-to-HIGH Level Output RL = 500Ω Propagation Delay Time CL = 50 pF HIGH-to-LOW Level Output www.fairchildsemi.com 2 DM74ALS38A Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M14A 3 www.fairchildsemi.com DM74ALS38A Quadruple 2-Input NAND Buffer with Open-Collector Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N14A 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: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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 reasonably expected to result in a significant injury to the user. www.fairchildsemi.com www.fairchildsemi.com 4