1 / 7

3 Input NAND GATE

Combinational Circuit Design and Simulation Using Gates. 3 Input NAND GATE. Combinational Circuit Design and Simulation Using Gates. Introduction to Digital Integrated Circuits. V CC , Power Supply Voltage Voltage supplied to integrated circuit, Nominal V CC is +5V

kelvin
Download Presentation

3 Input NAND GATE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Combinational Circuit Design and Simulation Using Gates 3 Input NAND GATE

  2. Combinational Circuit Design and Simulation Using Gates Introduction to Digital Integrated Circuits • VCC, Power Supply Voltage • Voltage supplied to integrated circuit, Nominal VCC is +5V • ICCH, Power Supply Current • Supply current required to operate IC, Output logic is “1” • ICCL, Power Supply Current • Supply current required to operate IC, Output logic is “0” • IOS, Short Circuit Output Current • Amount of current TTL output circuit can deliver into S.C • IOL, Output Current Low • Maximum output terminal sink current, Output logic is “0” • IOH, Output Current High • Maximum output terminal source current, Output logic is “1” • IIH, Current Input High • Maximum current at input terminal, Input logic is “1”

  3. Combinational Circuit Design and Simulation Using Gates Introduction to Digital Integrated Circuits • IIL, Current Input Low • Maximum input current, Input voltage logic is “0” • VOL, Voltage Output Low • Maximum allowable output voltage, Output logic is “0” • VOH, Voltage Input High • Minimum output voltage, Output logic is “1” • VIH, Voltage Input High • Minimum logical 1 input voltage, VIH is 2 V • VIL, Voltage Input Low • Maximum logical 1 input voltage, VIL is 0.8 V • tpLH, Propagation delay time • From Output “Low” to “High” • tpHL, Propagation delay time • From Output “High” to “Low”

  4. Introduction to Digital Integrated Circuits Signal Delay Times

  5. Introduction to Digital Integrated Circuits 2 Input NAND(74xxx00) Parameter Values

  6. INV 2 input NAND A.L=w’z+x’yz’ B.L=xy’z’+x’yz C.L=wx’y’z’ D.L=xy’z+w’z+x’yz’ 3 input NAND E.L=z+x’y 4 input NAND F.L=wx’y’+y’z G.L=xy’z+w’

  7. Introduction to Digital Integrated Circuits Power Consumption Considerations • Consider power consumption and switching speed • P=(ICCave)(VCC), assume VCC=5 V • 74LS00, 74LS10, 74LS20, and 74LS04 LD00 LS10 LS20 LS04 ICCH 0.8mA 0.6mA 0.4mA 1.2mA ICCL 2.4mA 1.8mA 1.2mA 3.6mA ICCave 1.6mA 1.2mA 0.8mA 2.4mA • Total average supply current is found • ICCave = 8(1.6)+6(1.2)+2(0.8)+6(2.4)=36mA • P=5.0V(36mA)=180mW

More Related