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Product Detailed Parameters
- Description：IC GATE AND 2CH 4-INP 14DIP
- Series：74ALS
- Mfr：Texas Instruments
- Package：Bulk,Tube
- 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：Through Hole
- Supplier Device Package：14-PDIP
- Package / Case：14-DIP (0.300", 7.62mm)
- Grade：-
- Qualification：-
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Overview
The SN74ALS21AN is a dual 4-input positive-AND gate from the Texas Instruments SN74ALS21A series. It operates within a supply voltage range of 4.5 V to 5.5 V and features a propagation delay of 15 ns. The device provides a low-level output current of 8 mA and a high-level output current of -400 µA. It is housed in a 14-pin PDIP package and supports an operating temperature range from 0°C to +70°C.
Feature Summary
- Contains two independent four-input AND logic gates for complex boolean operations.
- Utilizes Advanced Low-power Schottky technology to balance speed and power consumption.
- Provides standard TTL-compatible input and output voltage levels.
Applications
- Digital logic circuit design requiring multi-input conjunction
- Microprocessor system address decoding
- Control logic implementation in industrial automation
Procurement Notes
Verify the specific suffix 'AN' confirms the through-hole PDIP-14 package variant, distinct from surface-mount options like 'ADR'. Confirm RoHS compliance status via the manufacturer's official documentation before integration. Ensure the supplier source is authorized to guarantee component authenticity and traceability.
Selection Notes
Select this component when designing systems requiring dual four-input AND functionality with moderate switching speeds. The ALS series offers improved performance over standard LS logic while maintaining lower power dissipation than AS series devices. Verify that the 14-pin DIP form factor aligns with the target PCB layout constraints.
Part Context
This part belongs to the SN74ALS21A family, which extends the classic 74-series logic capabilities using advanced semiconductor processes. The ALS designation indicates optimized performance characteristics suitable for general-purpose digital applications where power efficiency and speed are balanced requirements.
Replacement Considerations
SN74ALS21AD (Surface Mount SOIC-14)
FAQ
What is the maximum propagation delay for the SN74ALS21AN?
The maximum propagation delay is 15 ns at a supply voltage of 5 V with a 50 pF load.
Does the SN74ALS21AN support 3-state outputs?
No, the SN74ALS21AN provides standard non-inverting AND gate outputs without tri-state capability.
