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Product Detailed Parameters
- Description：IC GATE NAND 2CH 4-INP 14SSOP
- Series：74ALS
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Bulk
- Logic Type：NAND Gate
- Number of Circuits：2
- Number of Inputs：4
- Features：-
- Voltage - Supply：4.5V ~ 5.5V
- Current - Quiescent (Max)：-
- Current - Output High, Low：400µA, 8mA
- Input Logic Level - Low：0.8V
- Input Logic Level - High：2V
- Max Propagation Delay @ V, Max CL：12.5ns @ 5V, 50pF
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Supplier Device Package：14-SSOP
- Package / Case：14-SSOP (0.209", 5.30mm Width)
- Grade：-
- Qualification：-
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Overview
The SN74ALS20ADBR is a dual 4-input positive-NAND gate from the Texas Instruments ALS logic family. It operates within a supply voltage range of 4.5V to 5.5V and features push-pull outputs with a maximum low-level output current of 8mA and a high-level output current of -0.4mA. The device supports data rates up to 75Mbps and exhibits propagation delays between 10ns and 50ns. It functions reliably across an operating temperature range of 0°C to 70°C and is housed in a 14-pin SOIC package.
Feature Summary
- Dual independent 4-input NAND logic gates
- High-speed operation with propagation delays as low as 10ns
- Push-pull output structure for improved drive capability
- Bipolar technology construction
Applications
- Digital signal processing circuits
- Memory address decoding systems
- Control logic interfaces
- General-purpose boolean logic implementation
Procurement Notes
Verify the specific suffix 'DBR' against official Texas Instruments documentation to confirm the exact tape-and-reel packaging configuration and moisture sensitivity level. Ensure the component meets RoHS3 compliance requirements if mandated by your manufacturing standards. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before procurement.
Selection Notes
Select this component when designing systems requiring fast switching speeds and moderate drive strength within standard TTL-compatible voltage levels. The ALS series offers superior speed-power product compared to older LS variants. Consider the 14-pin SOIC footprint constraints during PCB layout planning. Verify that the input logic thresholds align with the driving source's output characteristics for reliable noise immunity.
Part Context
This device belongs to the SN54/74ALS20A series, representing an advanced low-power Schottky logic family. It serves as a direct functional replacement for earlier generations like the SN74LS20, providing faster performance while maintaining pin compatibility. The ALS family was designed to bridge the gap between standard LS speed and AS performance, offering a balanced solution for general-purpose digital applications.
Replacement Considerations
The SN74ALS20AN and SN74ALS20AP are verified equivalent parts within the same family. These alternatives share identical logical functionality and electrical specifications but differ in physical packaging types. Confirm that the mechanical dimensions of the substitute package fit the existing board space and soldering profile requirements.
