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Product Detailed Parameters
- Description：IC GATE AND 2CH 4-INP 14SOIC
- Series：74ALS
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Logic Type：AND 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：15ns @ 5V, 50pF
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Supplier Device Package：14-SOIC
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Grade：-
- Qualification：-
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Overview
The SN74ALS21ADRE4 is a dual four-input positive-AND gate manufactured by Texas Instruments. It belongs to the ALS logic series and operates within a supply voltage range of 4.5 V to 5.5 V. The device features a 14-SOIC surface-mount package with two independent channels. Key electrical parameters include a low-level output current of 8 mA, a high-level output current of -400 µA, and a propagation delay of 15 ns at 5 V with a 50 pF load. It supports an operating temperature range from 0°C to +70°C.
Feature Summary
- Dual-channel architecture providing two independent four-input AND gates in a single package.
- ALS technology ensures high-speed operation with a propagation delay of 15 ns.
- Robust push-pull outputs deliver a low-level sink current of 8 mA.
Applications
- Digital logic circuits requiring multi-input AND functionality
- Microprocessor-based system control logic
- Memory address decoding applications
Procurement Notes
Verify the E4 suffix indicates lead-free construction compliant with RoHS standards. Confirm the SOIC-14 package dimensions match the design footprint. Ensure the commercial temperature range (0°C to +70°C) aligns with the operational environment requirements for the specific application.
Selection Notes
Select this component when dual four-input AND logic is required in a compact surface-mount format. The ALS series offers a balance of speed and power consumption suitable for general-purpose digital systems. Verify that the 5V supply voltage and standard TTL-compatible input levels meet the interface specifications of the driving circuitry.
Part Context
This part is a lead-free variant of the SN74ALS21ADR, distinguished by the E4 suffix. It is part of the broader SN74ALS21A family of dual four-input AND gates produced by Texas Instruments. The device serves as a direct replacement for non-lead-free versions while maintaining identical electrical performance and pinout compatibility.
Replacement Considerations
SN74ALS21ADR is the primary equivalent without the lead-free designation. SN74ALS21ANSR is available in tape-and-reel packaging. SN74HC21DR1G4 offers similar functionality but utilizes HC technology with different drive characteristics.
