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SN74ALS11AD Equivalent & Substitute Parts
Part Overview
The SN74ALS11AD is a 3-channel AND gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This component is classified as Last Time Buy, indicating discontinued production with limited availability. The SN74ALS11AD performs triple 3-input AND logic operations and is commonly used in digital logic circuits requiring AND gate functionality. Due to Last Time Buy status and finite inventory, identifying equivalent substitute parts ensures design continuity and supply chain reliability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN74ALS11AD |
| Manufacturer | Texas Instruments |
| Logic Type | AND Gate |
| Number of Circuits | 3 |
| Number of Inputs | 3 |
| Voltage - Supply | 4.5V ~ 5.5V |
| Current - Output High, Low | 400µA, 8mA |
| Input Logic Level - Low | 0.8V |
| Input Logic Level - High | 2V |
| Max Propagation Delay @ V, Max CL | 13ns @ 5V, 50pF |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the SN74ALS11AD is determined by strict equivalence across the following critical parameters:
- Logic function: 3-channel AND gate with 3 inputs per channel
- Electrical specifications: 4.5V ~ 5.5V supply voltage, 400µA/8mA output current, 0.8V/2V input logic levels, 13ns propagation delay
- Package type: 14-SOIC surface mount form factor
- Mechanical dimensions: 0.154" × 3.90mm width
- Compliance: ROHS3 compliant, MSL Level 1
The SN74ALS11ADR qualifies as a direct substitute based on identical electrical and functional parameters. The primary distinction is packaging format: the main part uses Tube packaging while the substitute uses Tape & Reel (TR) packaging. Both are 14-SOIC surface mount packages with identical pin configurations and electrical performance.
Parameter Comparison
| Parameter | SN74ALS11AD (Main) | SN74ALS11ADR (Substitute) |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Logic Type | AND Gate | AND Gate |
| Number of Circuits | 3 | 3 |
| Number of Inputs | 3 | 3 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current - Output High, Low | 400µA, 8mA | 400µA, 8mA |
| Input Logic Level - Low | 0.8V | 0.8V |
| Input Logic Level - High | 2V | 2V |
| Max Propagation Delay @ V, Max CL | 13ns @ 5V, 50pF | 13ns @ 5V, 50pF |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
| Packaging Format | Tube | Tape & Reel (TR) |
| Product Status | Last Time Buy | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
The SN74ALS11ADR is the direct substitute for the SN74ALS11AD. Both parts are manufactured by Texas Instruments with identical electrical specifications, logic function, and 14-SOIC package configuration. The SN74ALS11ADR maintains Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the main part.
Selection between these parts should be based on procurement requirements and assembly processes. The SN74ALS11AD in Tube packaging is suitable for manual handling and lower-volume applications. The SN74ALS11ADR in Tape & Reel format is optimized for automated pick-and-place assembly and higher-volume production runs. Both parts meet ROHS3 compliance and MSL Level 1 requirements, making them suitable for standard PCB assembly environments without special moisture control measures.
Frequently Asked Questions (FAQ)
Q: Can the SN74ALS11ADR replace the SN74ALS11AD in existing designs?
A: Yes. The SN74ALS11ADR is a direct electrical and functional equivalent. Pin configuration, logic operation, electrical performance, and operating parameters are identical. The only difference is packaging format (Tape & Reel versus Tube).
Q: What is the difference between Tube and Tape & Reel packaging?
A: Tube packaging contains individual components in a plastic tube suitable for manual handling and small-quantity orders. Tape & Reel packaging places components on a continuous carrier tape wound on a reel, optimized for automated assembly equipment. Both formats contain the same 14-SOIC component with identical electrical characteristics.
Q: Are there any compatibility concerns when switching from SN74ALS11AD to SN74ALS11ADR?
A: No compatibility concerns exist. Both parts use the same 14-SOIC package with identical pin assignments, electrical specifications, and operating ranges. PCB layout, schematic connections, and circuit design remain unchanged.
Q: Why is the SN74ALS11AD marked as Last Time Buy?
A: Last Time Buy status indicates Texas Instruments has discontinued production of this part number. The SN74ALS11ADR in Tape & Reel format remains in Active production status, providing a path for continued supply and design continuity.
Q: Do both parts require the same handling and storage conditions?
A: Yes. Both parts have MSL Level 1 (Unlimited) moisture sensitivity, requiring no special moisture control during storage or handling. Standard ESD precautions apply to both components.
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