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| DM74LS38 Quad 2-Input NAND Buffer with Open-Collector Outputs August 1986 Revised March 2000 DM74LS38 Quad 2-Input NAND Buffer with Open-Collector Outputs General Description 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. Pull-Up Resistor Equations 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 DM74LS38M DM74LS38SJ DM74LS38N Package Number M14A M14D N14A Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 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 A L L H H H = HIGH Logic Level L = LOW Logic Level Output B L H L H Y H H H L (c) 2000 Fairchild Semiconductor Corporation DS006363 www.fairchildsemi.com DM74LS38 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Output Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 7V 0C to +70C -65C to +150C 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 Symbol VCC VIH VIL VOH IOL TA Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Current Free Air Operating Temperature 0 Parameter Min 4.75 2 0.8 5.5 24 70 Nom 5 Max 5.25 Units V V V V mA C Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI ICEX VOL Parameter Input Clamp Voltage HIGH Level Output Current LOW Level Output Voltage II IIH IIL ICCH ICCL Input Current @ Max Input Voltage HIGH Level Input Current LOW Level Input Current Supply Current with Outputs HIGH Supply Current with Outputs LOW Conditions VCC = Min, II = -18 mA VCC = Min, VO = 5.5V VIL = Max VCC = Min, IOL = Max VIH = Min IOL = 12 mA, VCC = Min VCC = Max, VI = 7V VCC = Max, VI = 2.7V VCC = Max, VI = 0.4V VCC = Max VCC = Max 0.9 6 0.35 0.25 Min Typ (Note 2) Max -1.5 250 0.5 0.4 0.1 20 -0.36 2 12 mA A mA mA mA Units V A V Note 2: All typicals are at VCC = 5V, TA = 25C. Switching Characteristics at VCC = 5V and TA = 25C RL = 667 Symbol tPLH tPHL Parameter Min Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output CL = 45 pF Max 22 22 CL = 150 pF Min Max 48 29 ns ns Units www.fairchildsemi.com 2 DM74LS38 Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow Package Number M14A 3 www.fairchildsemi.com DM74LS38 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14D www.fairchildsemi.com 4 DM74LS38 Quad 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: 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. 5 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. www.fairchildsemi.com www.fairchildsemi.com |
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