This Product Selection Guide contains information to help select products in the Gates and Inverters category on DigiKey.com
Products in the logic gate and inverter family perform elementary logical operations on individual logic signals such as AND, NOT, OR, etc. Unlike flip-flops, they cannot store information and respond immediately to the signals presented to their inputs. Though long supplanted by implementations in integrated circuit form for realizing complex functions, discrete gates remain available for use in circumstances where only very simple logical functions are needed.
SelectionCharacteristics
Logic Type: Describes the logic functions used within the circuit.
Number of Circuits: Indicates the number of circuits of similar functions that are implemented within the device.
Number of Inputs: Indicates the number of inputs provided to each instance of a logic function incorporated in a device.
Features: These are different capabilities or properties of the device such as 3 outputs, low jitter, or strobe.
Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Current - Quiescent (Max): Characterizes the amount of supply current required to power a device’s internal functions. Measured with no output load and inputs connected to fixed-voltage signals defined by the manufacturer.
Current - Output High, Low: The maximum recommended current flow through a device’s output pin. Multiple values reflect ratings that differ depending on the direction of the current flow.
Input Logic Level - Low: Indicates the maximum input voltage to the device to be considered a logic low.
Input Logic Level - High: Indicates the minimum input voltage to the device to be considered a logic high.
Max Propagation Delay @ V, Max CL: Characterizes the maximum time delay between the assertion of the device input and the appearance of the resulting change in device output, subject to the indicated supply voltage and load capacitance conditions.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the suppliers device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
ProductExamples
| MFR PART # | 74AHCT1G00SE-7 |
|---|---|
| DIGIKEY PART # | 74AHCT1G00SE-7DITR-ND - Tape & Reel (TR) |
| MANUFACTURER | Diodes Incorporated |
| DESCRIPTION | NAND Gate IC 1 Channel SOT-353 |
| DATASHEET | Click Here |
SchematicSymbol
AND Gate
OR Gate
NOR Gate
NAND Gate
Inverter Gate
Schematic symbol courtesy of Scheme-it. Please see their website for more information and symbols.
MediaLinks
Videos
Hands-on with Logic Gates
Strata: Logic Gate Interfacing
Blogs
How to Select a MOSFET for Logic Circuits or Gate Design
TechForum
Gate
Adding All Logic Gates to LTSpice