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Microchip Technology 24AA16-I/P
- Part No.:
- 24AA16-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
24AA16-I/P.pdf
- Description:
- IC EEPROM 16KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,100
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Product details
Overview
24AA16-I/P from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency (100 kHz below 2.5V), 5 ms max page write time, and industrial temperature range (–40°C to +85°C). It supports hardware write-protection via the WP pin and is packaged in an 8-lead PDIP.
For engineers reviewing the 24AA16-I/P datasheet, 24AA16-I/P pinout, 24AA16-I/P application, or 24AA16-I/P equivalent, this page delivers verified electrical specs, I²C timing constraints, page buffer behavior, WP functionality, and real-world use cases in embedded configuration storage and sensor calibration retention.
Technical Context
The 24AA16-I/P implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 16-byte page write buffer, self-timed erase/write cycle, and address pointer that auto-increments during sequential reads.
It uses a fixed 4-bit control code (1010) plus 3-bit block-select bits (B2–B0) for device addressing, supporting only one 24XX16 per I²C bus. Write protection is implemented at the hardware level via the WP pin-tied to VCC to inhibit all writes while permitting full read access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 bytes), organized as eight 256 × 8-bit blocks for modular addressing |
| Interface | I²C-compatible two-wire serial interface with 100/400 kHz operation (100 kHz at VCC < 2.5V) |
| Write Cycle Time | ≤5 ms per byte or page-enables rapid nonvolatile updates without blocking host CPU |
| Supply Voltage | 1.7V–5.5V-supports direct connection to 1.8V, 2.5V, 3.3V, and 5V logic domains |
| Endurance | 1,000,000 erase/write cycles-suitable for frequent calibration or logging applications |
| Data Retention | >200 years at +25°C-ensures long-term reliability in unpowered storage |
| Operating Temp. | –40°C to +85°C (Industrial grade)-validated for automotive under-hood and industrial control environments |
Pinout & Package
8-Lead Plastic Dual In-Line Package (PDIP), 300 mil body width, through-hole mounting. Pin 1 is top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Return path for all internal circuitry; must be connected to system GND |
| WP | Hardware write-protect input | Tie to VCC to disable all writes; tie to VSS to enable full read/write access |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transactions; requires pull-up resistor |
| SDA | Serial data bidirectional I/O | Open-drain bus line for address/data transfer; requires external pull-up (2–10 kΩ) |
| VCC | Power supply | 1.7V–5.5V supply; decoupling capacitor (0.1 μF) recommended near pin |
| A0, A1, A2 | No-connect (NC) | Not internally bonded; may be left floating or tied to VSS/VCC with no functional effect |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.7V-enables direct integration with 1.8V microcontrollers without level shifters |
| Page write buffer | 16-byte buffer reduces I²C transaction overhead by up to 16× vs. byte-write mode |
| Schmitt-trigger inputs | 0.05 VCC hysteresis on SCL/SDA-rejects noise spikes up to 50 ns, improving bus robustness |
| Hardware write-protect | Single-pin (WP) global lock-prevents accidental firmware corruption during power transitions |
| ESD protection | >4 kV HBM-meets IEC 61000-4-2 Level 3 for reliable handling in manufacturing and field service |
Applications
| Embedded Configuration Storage | Sensor Calibration Data Retention |
|---|---|
Use Scenario: Storing user-configurable settings (e.g., display brightness, network ID, language) in smart thermostats and industrial HMIs. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during boot and runtime updates. Use Value: Enables field-upgradable settings without requiring reprogramming of main MCU flash or external SPI EEPROM. | Use Scenario: Holding factory-calibrated offset/gain coefficients for analog sensors (e.g., pressure, temperature) in medical devices. IC Role / Device Role / Timing Role: Read-once-at-boot I²C slave providing precision correction parameters to ADC driver firmware. Use Value: Maintains traceable calibration across product lifetime (>200 years retention) and survives >1M recalibration cycles. |
| Firmware Parameter Backup | Power-Fail Event Logging |
Use Scenario: Saving critical runtime parameters (e.g., motor position, battery SOC, last known state) before controlled shutdown in UPS systems. IC Role / Device Role / Timing Role: Fast-write-capable EEPROM interfaced directly to MCU GPIO/I²C for deterministic save latency ≤5 ms. Use Value: Guarantees parameter recovery after unexpected power loss-no data loss even during brown-out conditions. | Use Scenario: Recording timestamped fault events (e.g., overvoltage, thermal trip) in energy meters and solar inverters. IC Role / Device Role / Timing Role: Low-power I²C slave with 1 μA standby current, activated only during fault interrupt handling. Use Value: Supports 10+ years of daily event logging at <100 bytes/event with full endurance margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC16B-I/P | Requires minimum 2.5V VCC; same 400 kHz speed, 8-PDIP package, and pinout | Not suitable for 1.8V systems; otherwise identical use cases and firmware compatibility | Select when operating exclusively above 2.5V and cost sensitivity outweighs low-voltage flexibility |
| AT24C16C-PU | Same 16-Kbit size and I²C interface but rated for 1.7–5.5V and 1 MHz max clock; different device address (1010000x) | Supports faster bus speeds and shares voltage range; requires minor firmware address update | Choose for higher throughput in new designs where 1 MHz timing margins are validated |
Compared with 24LC16B-I/P, the 24AA16-I/P enables 1.8V operation and retains identical pinout and command set; versus AT24C16C-PU, it offers proven industrial qualification and longer field history but lacks 1 MHz support-making it optimal for cost-sensitive, voltage-flexible legacy or mid-speed embedded systems.
Availability
24AA16-I/P is available at Aetrix Electronics and suitable for embedded configuration storage, sensor calibration data retention, and firmware parameter backup requiring stable component supply across automotive, industrial, and consumer electronics programs.
Supply support for 24AA16-I/P 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, with global design and manufacturing operations.
The 24AA16-I/P belongs to Microchip's 24XX16 family of serial EEPROMs, designed specifically for low-power, space-constrained embedded systems requiring reliable nonvolatile storage with minimal board footprint and I²C bus compatibility.
FAQ
What is the maximum clock frequency supported by the 24AA16-I/P?
The 24AA16-I/P supports up to 400 kHz when VCC is ≥2.5V, and 100 kHz when VCC is between 1.7V and 2.5V. This dual-speed capability ensures interoperability across 1.8V, 3.3V, and 5V I²C buses without external clock dividers or protocol translation. The 24AA16-I/P does not support 1 MHz operation-unlike the 24FC16 variant.
Does the 24AA16-I/P require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA16-I/P has open-drain SDA and SCL pins and requires external pull-up resistors. Typical values are 10 kΩ for 100 kHz, 2 kΩ for 400 kHz, and 1 kΩ for marginal 1 MHz (not officially supported). These resistors ensure proper logic high levels and meet rise-time specifications defined in the AC characteristics table of the 24AA16-I/P datasheet.
How does the WP pin function on the 24AA16-I/P?
The WP (Write-Protect) pin on the 24AA16-I/P provides hardware-level memory locking: when tied to VCC, all write operations-including byte, page, and erase-are inhibited while reads remain fully functional. When tied to VSS or left floating, full read/write access is enabled. This feature prevents accidental overwrites during power-up/down transients or firmware bugs.
What is the page write buffer size of the 24AA16-I/P, and how does it affect programming efficiency?
The 24AA16-I/P features a 16-byte page write buffer, allowing up to 16 bytes to be loaded into the buffer and written to memory in a single self-timed cycle (≤5 ms). This reduces I²C transaction count by up to 16× compared to byte-write mode, significantly improving firmware update throughput and minimizing bus occupancy in resource-constrained systems using the 24AA16-I/P.
Is the 24AA16-I/P qualified for automotive applications?
No-the 24AA16-I/P is specified for Industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While the broader 24XX16 family includes AEC-Q100-qualified variants (e.g., 24AA16T-I/MNY), the 24AA16-I/P in PDIP packaging is intended for industrial, commercial, and consumer applications. For automotive use, engineers must select explicitly qualified versions with appropriate packaging and test documentation.
24AA16-I/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
24AA16-I/P FAQ
1.How can I place an order for 24AA16-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA16-I/P 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-I/P reliable?
The price and inventory of 24AA16-I/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA16-I/P is usually 5 days.
3.What payment methods are accepted for 24AA16-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA16-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA16-I/P?
24AA16-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA16-I/P 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-I/P?
For technical support, including 24AA16-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA16-I/P requirements.
6.How does Aetrix verify that 24AA16-I/P is sourced from the original manufacturer or authorized distributors?
All 24AA16-I/P 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-I/P meets industry standards.
7.What is the process for return or replacement of 24AA16-I/P?
All 24AA16-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 24AA16-I/P, 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-I/P part is unused and in its original packaging.
Return procedure for 24AA16-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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