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Part Number 7438
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description Quad 2-Input NAND Buffers
Datasheet 7438 Datasheet7438 Datasheet (PDF)

DM7438 • 7438 Quad 2-Input NAND Buffers with Open-Collector Outputs September 1986 Revised February 2000 DM7438 • 7438 Quad 2-Input NAND Buffers 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 resist.

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DM7438 • 7438 Quad 2-Input NAND Buffers with Open-Collector Outputs September 1986 Revised February 2000 DM7438 • 7438 Quad 2-Input NAND Buffers 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 Package Number Package Description DM7438M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM7438N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 7438SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm 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 AB LL LH HL HH H = HIGH Logic Level L = LOW Logic Level Output Y H H H L © 2000 Fairchild Semiconductor Corporation DS006513 www.fairchildsemi.com DM7438 • 7438 Absolute Maximum Ratings(Note 1) Supply Voltage 7V Input Voltage 5.5V Output Voltage 7V Operating Free Air Temperature Range 0°C to +70°C Storage Temperature Range −65°C to +150°C 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 Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Current Free Air Operating Temperature Min 4.75 2 0 Nom 5 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions VI ICEX VOL II IIH IIL ICCH ICCL Input Clamp Voltage HIGH Level Output Current LOW Level Output Voltage Input Current @ Max Input Voltage HIGH Level Input Current LOW Level Input Current Supply Current with Outputs HIGH Supply Current with Outputs LOW VCC = Min, II = −12 mA VCC = Min, VO = 5.5V VIL = Max VCC = Min, IOL = Max VIH = Min VCC = Max, VI = 5.5V VCC = Max, VI = 2.4V VCC = Max, VI = 0.4V VCC = Max VCC = Max Switching Characteristics at VCC = 5V and TA = 25°C Symbol Parameter tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output Note 2: All typicals are at VCC = 5V, TA = 25°C. CL = 45 pF RL = 133Ω Conditions Max Units 5.25 V V 0.8 V 5.5 V 48 mA 70 °C Typ Min Max (Note 2) −1.5 250 0.4 1 40 −1.6 5 8.5 34 54 Units V µA V mA µA mA mA mA Min Max Units 22 ns 18 ns www.fairchildsemi.com 2 DM7438 • 7438 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 DM7438 • 7438 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 DM7438 • 7438 Quad 2-Input NAND Buffers 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. 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 5 www.fairchildsemi.com .


DM7438 7438 LA7117


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