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24AA16T-E/ST EEPROM Memory IC Equivalent & Substitute Parts
Part Overview
The 24AA16T-E/ST is a 16Kbit I2C EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates across a wide supply voltage range of 1.7V to 5.5V and supports I2C communication at 400 kHz clock frequency. The component is housed in an 8-TSSOP surface mount package and is currently in active production status with ROHS3 compliance certification.
Substitute parts are identified when equivalent electrical performance, memory capacity, interface protocol, and physical packaging specifications are maintained across different manufacturers. This ensures functional interchangeability in circuit designs while maintaining design integrity and performance requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Memory Size | 16Kbit |
| Memory Organization | 2K x 8 |
| Memory Interface | I2C |
| Clock Frequency | 400 kHz |
| Access Time | 900 ns |
| Write Cycle Time | 5ms |
| Voltage Supply Range | 1.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C |
| Package Type | 8-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the 24AA16T-E/ST are qualified based on the following critical parameters that determine functional interchangeability:
Memory Specifications: 16Kbit capacity with 2K x 8 organization and I2C interface protocol at 400 kHz operation.
Electrical Performance: Access time of 900 ns and write cycle time of 5ms must be maintained.
Physical Compatibility: 8-TSSOP surface mount package with identical 0.173" width and 4.40mm dimensions.
Environmental Compliance: ROHS3 compliance and MSL Level 1 rating.
Supply Voltage Compatibility: Operating voltage range must support the application requirements. The main part operates from 1.7V to 5.5V, establishing the baseline compatibility window.
Operating Temperature Range: Must support the required temperature specifications for the application environment.
The identified substitute part R1EX24016ATAS0I#S0 from Renesas Electronics Corporation meets these core electrical and mechanical parameters, enabling direct functional replacement in circuit designs.
Parameter Comparison
| Parameter | 24AA16T-E/ST (Microchip) | R1EX24016ATAS0I#S0 (Renesas) |
|---|---|---|
| Memory Size | 16Kbit | 16Kbit |
| Memory Organization | 2K x 8 | 2K x 8 |
| Memory Interface | I2C | I2C |
| Clock Frequency | 400 kHz | 400 kHz |
| Access Time | 900 ns | 900 ns |
| Write Cycle Time | 5ms | 5ms |
| Voltage Supply Range | 1.7V ~ 5.5V | 1.8V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Package Type | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Both the 24AA16T-E/ST and R1EX24016ATAS0I#S0 maintain ROHS3 compliance and MSL Level 1 certification, confirming environmental and regulatory compatibility. Both components are in active production status.
Selection between these parts should be based on application-specific requirements:
Supply Voltage Consideration: The Microchip 24AA16T-E/ST operates from 1.7V minimum supply voltage, while the Renesas R1EX24016ATAS0I#S0 requires 1.8V minimum. Applications operating below 1.8V supply voltage must use the Microchip part.
Operating Temperature Range: The Microchip part supports operation to 125°C maximum, while the Renesas part is rated to 85°C maximum. Applications requiring operation above 85°C must use the Microchip part.
Availability and Lead Time: Inventory levels and supplier lead times may influence selection when both parts meet electrical and thermal requirements.
Frequently Asked Questions (FAQ)
Q: Can the R1EX24016ATAS0I#S0 directly replace the 24AA16T-E/ST in all applications?
A: Direct replacement is possible when the application operates within the Renesas part's specifications: supply voltage of 1.8V or higher and operating temperature not exceeding 85°C. Applications requiring 1.7V supply voltage or temperatures above 85°C require the Microchip part.
Q: Are the I2C interface protocols identical between these parts?
A: Both parts implement I2C interface at 400 kHz clock frequency with identical 900 ns access time and 5ms write cycle time. I2C protocol compatibility is maintained.
Q: Do both parts use the same physical package?
A: Yes. Both components use the 8-TSSOP surface mount package with 0.173" width and 4.40mm dimensions, enabling identical PCB footprints and assembly processes.
Q: What is the significance of the MSL Level 1 rating?
A: MSL Level 1 indicates unlimited shelf life without moisture baking requirements, simplifying component storage and handling procedures compared to higher MSL ratings.
Q: Are there compliance differences between the two parts?
A: Both parts maintain ROHS3 compliance and REACH Unaffected status. No compliance differentiation exists between the two options.
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