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| DM74AS21 Dual 4-Input AND Gate April 1984 Revised March 2000 DM74AS21 Dual 4-Input AND Gate General Description This device contains two independent 4-input gates, each of which performs the logic AND function. Features s Switching specifications at 50 pF s Switching specifications guaranteed over full temperature and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin for pin compatible with Schottky, low power Schottky, and advanced low power Schottky TTL counterpart s Improved AC performance over Schottky, low power Schottky and advanced low power Schottky counterparts Ordering Code: Order Number DM74AS21M DM74AS21N Package Number M14A N14A Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 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 Inputs A H L X X X B H X L X X C H X X L X D H X X X L Output Y H L L L L H = HIGH Logic Level L = LOW Logic Level X = Either LOW or HIGH Logic Level (c) 2000 Fairchild Semiconductor Corporation DS006277 www.fairchildsemi.com DM74AS21 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range Typical JA N Package M Package 84.0C/W 114.0C/W 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 IOH IOL TA Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature 0 Parameter Min 4.5 2 0.8 -2 20 70 Nom 5 Max 5.5 Units V V V mA mA C Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25C. Symbol VIK VOH VOL II IIH IIL IO ICC Parameter Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage HIGH Level Input Current LOW Level Input Current Output Drive Current Supply Current IOH = -2 mA, VCC = 4.5V to 5.5V VCC = 4.5V IOL = 20 mA VCC = 5.5V, VIH = 2.7V VCC = 5.5V, VIL = 0.4V VCC = 5.5V, VO = 2.25V VCC = 5.5V Outputs HIGH Outputs LOW -30 2.9 7.4 Conditions VCC = 4.5V, II = -18 mA VCC - 2 0.35 0.5 0.1 20 -0.5 -112 4.6 12 Min Typ Max -1.2 Units V V V mA A mA mA mA mA Input Current @ Max Input Voltage VCC = 5.5V, VIH = 7V Switching Characteristics over recommended operating free air temperature range Symbol tPLH tPHL Parameter Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output RL = 500 CL = 50 pF Conditions VCC = 4.5V to 5.5V Min 1 1 Max 6 6 Units ns ns www.fairchildsemi.com 2 DM74AS21 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 DM74AS21 Dual 4-Input AND Gate 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. www.fairchildsemi.com 4 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 |
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