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Microchip Technology 24AA16-E/SN
- Part No.:
- 24AA16-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA16-E/SN.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,857
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Product details
Overview
24AA16-E/SN from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks. It operates from 1.7V to 5.5V, supports up to 400 kHz clock frequency (100 kHz below 2.5V), features hardware write-protection via the WP pin, and delivers ≤1 μA standby current at extended temperature (–40°C to +125°C). It is used in industrial sensor calibration storage and embedded system configuration retention.
For engineers reviewing the 24AA16-E/SN datasheet, 24AA16-E/SN pinout, 24AA16-E/SN application, or 24AA16-E/SN equivalent, key selection criteria include its 1.7V low-voltage operation, 16-byte page write buffer, Schmitt-triggered I²C inputs for noise immunity, and E-temp qualification for harsh environments.
Technical Context
The 24AA16-E/SN functions as an I²C slave device with fixed 4-bit control code '1010' and 3-bit block-select addressing, enabling access to eight 256-word memory blocks. Its internal Address Pointer auto-increments during sequential reads and supports current address, random, and sequential read modes.
It implements self-timed erase/write cycles with 5 ms maximum page write time, uses on-chip HV generation for EEPROM programming, and incorporates input filtering (≤50 ns spike suppression) and slope-controlled outputs to suppress ground bounce - all while maintaining I²C bus protocol compliance including Start/Stop detection and ACK/NACK handshaking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8), organized as eight 256-word blocks for hierarchical addressing |
| Supply Voltage Range | 1.7V–5.5V - enables direct interface with 1.8V/3.3V/5V systems without level shifters |
| I²C Clock Frequency | Up to 400 kHz (≥2.5V); 100 kHz (1.7V–2.49V) - ensures timing compliance across voltage scaling |
| Page Write Buffer | 16 bytes - reduces write transaction overhead by batching data before internal programming |
| Write Protection | Hardware-enabled via WP pin tied to VCC - prevents accidental overwrites during power transitions or firmware faults |
| Data Retention | >200 years - guarantees long-term configuration storage in unpowered equipment |
| Endurance | 1,000,000 erase/write cycles - supports frequent recalibration or logging in field-deployed devices |
Pinout & Package
24AA16-E/SN is packaged in an 8-lead narrow SOIC (SN) with 1.27 mm pitch, 3.90 mm body width, and JEDEC-standard footprint. The exposed pad is not present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Common return path for all internal circuitry; must be low-impedance to support noise-suppressed I²C signaling |
| WP | Write-protect control input | Logic-high (VCC) disables all writes; logic-low (VSS) enables full read/write access - no external pull-up required |
| SCL | Serial clock input | Asynchronous master-generated clock; Schmitt-triggered to reject sub-50 ns noise spikes on noisy PCBs |
| SDA | Bidirectional data I/O | Open-drain output requiring external pull-up; supports multi-master arbitration and ACK/NACK signaling |
| VCC | Power supply | Accepts 1.7V–5.5V; internal regulation powers EEPROM array and logic independently of rail stability |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.7V | Enables direct integration into battery-powered or energy-harvesting systems without voltage boosting |
| Schmitt-trigger inputs on SDA/SCL | Provides ≥50 mV hysteresis (0.05×VCC) to reject EMI-induced glitches in industrial motor-control environments |
| Output slope control | Limiting edge rates eliminates ground bounce during fast I²C transitions, preventing false Start/Stop detection |
| Hardware write-protect (WP) | Eliminates need for software-based lock bits - prevents corruption during brown-out or reset sequences |
| ESD protection >4 kV | Meets IEC 61000-4-2 Level 3, supporting safe handling and board-level integration without additional TVS |
Applications
| Industrial Sensor Calibration | Embedded Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up via I²C to initialize ADC reference points and linearization tables. Use Value: Eliminates need for external calibration trimmers; maintains accuracy over 200+ years without maintenance. | Use Scenario: Holding user-defined network parameters (IP, subnet, gateway) in industrial gateways after firmware updates. IC Role / Device Role / Timing Role: I²C slave providing persistent parameter storage independent of main MCU flash wear endurance limits. Use Value: Supports 1M+ write cycles - exceeds typical field update frequency by >100×, ensuring lifetime reliability. |
| Automotive Body Control Module | Medical Device Settings Backup |
Use Scenario: Saving seat/mirror position presets and lighting profiles in AEC-Q100-qualified vehicle ECUs. IC Role / Device Role / Timing Role: Extended-temperature EEPROM interfacing directly with 3.3V microcontroller I²C peripheral under under-hood thermal stress. Use Value: –40°C to +125°C operation and 1.7V start-up enable reliable function during cold cranking and high-ambient conditions. | Use Scenario: Retaining patient-specific therapy settings (dose rate, duration, alarm thresholds) across power cycles in portable infusion pumps. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory with write-protection enabled during active delivery to prevent accidental parameter overwrite. Use Value: Hardware WP pin ensures settings remain immutable during runtime - no firmware vulnerability surface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC16B-E/SN | Requires minimum 2.5V VCC; same pinout, package, and 400 kHz speed but no 1.7V operation | Not suitable for 1.8V systems or brown-out recovery scenarios below 2.5V | Select only if system rail is guaranteed ≥2.5V and extended low-voltage margin is unnecessary |
| 24FC16-E/SN | Supports 1 MHz I²C clock (vs. 400 kHz); identical voltage range and temp grade | Enables faster bulk configuration loading in high-throughput manufacturing test fixtures | Choose when system host supports 1 MHz I²C and reduced programming time justifies potential layout revalidation |
Compared with 24LC16B-E/SN, the 24AA16-E/SN enables lower-voltage operation critical for energy-constrained designs; compared with 24FC16-E/SN, it trades maximum speed for broader legacy I²C compatibility and proven stability in noise-sensitive applications.
Availability
24AA16-E/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device settings backup requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24AA16-E/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona.
The 24AA16-E/SN belongs to Microchip's 24XX16 family of I²C serial EEPROMs, designed specifically for robust, low-power, and extended-temperature nonvolatile data storage in industrial, automotive, and medical applications.
FAQ
What is the maximum I²C clock frequency supported by the 24AA16-E/SN?
The 24AA16-E/SN supports up to 400 kHz when VCC ≥ 2.5V, and 100 kHz when VCC is between 1.7V and 2.49V. This dual-speed capability ensures reliable communication across varying supply conditions without requiring clock rate negotiation in firmware. The 24AA16-E/SN does not support 1 MHz operation - that is exclusive to the 24FC16 variant.
Does the 24AA16-E/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA16-E/SN requires external pull-up resistors on both SDA and SCL because its I/O pins are open-drain. Typical values are 10 kΩ for 100 kHz, 2 kΩ for 400 kHz. The 24AA16-E/SN does not integrate internal pull-ups, so omission will result in bus failure. Pull-up voltage must match the host I²C domain (e.g., 3.3V for 3.3V systems).
How does hardware write-protection work on the 24AA16-E/SN?
Hardware write-protection on the 24AA16-E/SN is controlled by the WP pin: tying WP to VCC disables all write operations (including byte and page writes) while preserving full read functionality. Tying WP to VSS enables normal read/write access. No command sequence or register setting is needed - protection is purely pin-level and active immediately upon power-up.
What is the memory organization of the 24AA16-E/SN?
The 24AA16-E/SN contains 16 Kbit (2048 bytes) of EEPROM organized as eight independent 256-word blocks. Each block is selected using the three most significant bits (B2–B0) of the I²C slave address. This structure allows selective block access and simplifies memory mapping in systems with multiple configuration domains.
Is the 24AA16-E/SN qualified for automotive applications?
Yes, the 24AA16-E/SN is AEC-Q100 qualified for automotive use and rated for extended temperature operation from –40°C to +125°C. Its qualification covers stress testing for thermal cycling, humidity, and electrical robustness - making it suitable for body control modules, infotainment backups, and other non-safety-critical automotive subsystems.
24AA16-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA16-E/SN FAQ
1.How can I place an order for 24AA16-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA16-E/SN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 24AA16-E/SN reliable?
The price and inventory of 24AA16-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA16-E/SN is usually 5 days.
3.What payment methods are accepted for 24AA16-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA16-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA16-E/SN?
24AA16-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA16-E/SN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 24AA16-E/SN?
For technical support, including 24AA16-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA16-E/SN requirements.
6.How does Aetrix verify that 24AA16-E/SN is sourced from the original manufacturer or authorized distributors?
All 24AA16-E/SN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24AA16-E/SN meets industry standards.
7.What is the process for return or replacement of 24AA16-E/SN?
All 24AA16-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA16-E/SN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 24AA16-E/SN part is unused and in its original packaging.
Return procedure for 24AA16-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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