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Microchip Technology 24AA16T-E/OT16KVAO
- Part No.:
- 24AA16T-E/OT16KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24AA16T-E/OT16KVAO.pdf
- Description:
- IC EEPROM 16KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,586
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Product details
Overview
24AA16T-E/OT16KVAO 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/extended temperature support (–40°C to +125°C). It delivers low-power operation (1 μA standby, 1 mA active) and hardware write-protection via the WP pin for embedded configuration storage in automotive and industrial controllers.
For engineers reviewing the 24AA16T-E/OT16KVAO datasheet, 24AA16T-E/OT16KVAO pinout, 24AA16T-E/OT16KVAO application, or 24AA16T-E/OT16KVAO equivalent, key selection criteria include voltage range compatibility (1.7V min), I²C timing compliance at extended temperature, page write buffer size (16 bytes), endurance (1M cycles), and RoHS-compliant 8-lead SOT-23 packaging with exposed pad.
Technical Context
The 24AA16T-E/OT16KVAO 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 8-block EEPROM array, 16-byte page latches, and address pointer logic supporting current-address, random, and sequential read modes.
Write protection is implemented via a dedicated WP pin tied to VCC (full-array lockout) or VSS (normal operation); A0–A2 pins are unconnected and may be left floating. The device uses self-timed erase/write cycles and supports acknowledge polling to detect write completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit), organized as eight 256-word blocks for block-select addressing |
| Supply Voltage Range | 1.7V to 5.5V - enables direct interfacing with 1.8V/3.3V/5V systems without level shifting |
| Max Clock Frequency | 400 kHz (≥2.5V), 100 kHz (<2.5V) - defines maximum I²C bus throughput under low-voltage operation |
| Page Write Buffer | 16 bytes - allows burst writes within a single physical page boundary to reduce bus overhead |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention - suitable for frequent configuration updates |
| Temperature Range | –40°C to +125°C (Extended grade) - qualified for under-hood automotive and harsh industrial environments |
| Write Protection | Hardware-enabled via WP pin - prevents accidental overwrites during power-up/down or firmware faults |
Pinout & Package
24AA16T-E/OT16KVAO is housed in an 8-lead SOT-23 package (JEDEC MO-178AA) with exposed thermal pad (pin 5), measuring 2.9 mm × 1.6 mm × 1.1 mm. Pin 1 = SCL, Pin 2 = VSS, Pin 3 = SDA, Pin 4 = VCC, Pin 5 = WP. A0–A2 pins are not internally connected and omitted from this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL (Pin 1) | Serial Clock Input | Master-generated clock synchronizing all I²C transactions; requires external pull-up resistor |
| VSS (Pin 2) | Ground Reference | Primary return path for all internal circuitry and I/O signals; connects to PCB ground plane |
| SDA (Pin 3) | Bidirectional Data I/O | Open-drain bus line for address/data transfer; requires external pull-up (2 kΩ typical for 400 kHz) |
| VCC (Pin 4) | Power Supply | Single supply input (1.7–5.5V); decoupling capacitor (0.1 μF) required near pin |
| WP (Pin 5) | Write-Protect Control | Logic-high disables all write operations; tied to VCC for permanent protection or VSS for full access |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V - supports battery-backed and energy-harvesting systems without voltage boosters |
| Noise Immunity | Schmitt-trigger inputs + 50 ns input filter - rejects EMI spikes on SDA/SCL lines in noisy motor-control or automotive environments |
| Page Write Efficiency | 16-byte buffer reduces I²C transaction count by up to 15× vs. byte-write mode - lowers CPU overhead and bus contention |
| Extended Temp Reliability | AEC-Q100 qualified (Grade 1) - validated for automotive applications requiring –40°C to +125°C operation |
| ESD Robustness | ±4 kV HBM - protects against handling damage and system-level ESD events in manufacturing and field deployment |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing calibration data, fault logs, and user-defined settings in door module ECUs subject to wide temperature swings and vibration. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime; WP pin hardwired to VCC for safety-critical write lockout. Use Value: Ensures parameter integrity across 1M+ ignition cycles and >200-year data retention, eliminating need for backup batteries or supercapacitors. | Use Scenario: Holding firmware update metadata, I/O mapping tables, and calibration coefficients in modular programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Slave EEPROM on isolated I²C bus; supports sequential reads for fast parameter loading and page writes for efficient field updates. Use Value: 16-byte page buffer cuts configuration write time by 85% vs. byte mode, accelerating commissioning and reducing downtime during firmware upgrades. |
| Smart Energy Meter Firmware Vault | Medical Infusion Pump Parameter Backup |
Use Scenario: Securing tariff schedules, billing history, and cryptographic keys in ANSI C12.22-compliant smart meters operating in outdoor enclosures. IC Role / Device Role / Timing Role: Tamper-resistant storage element with WP pin monitored by security MCU; operates reliably at 85°C ambient with 1.8V supply. Use Value: 1.7V minimum VCC enables direct connection to meter's 1.8V rail, avoiding LDO dropout issues and improving power efficiency. | Use Scenario: Preserving drug library parameters, dose limits, and audit trails in Class II medical infusion pumps requiring FDA 21 CFR Part 11 compliance. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory with >200-year retention; write-protected during delivery to prevent unauthorized parameter changes. Use Value: Eliminates risk of data corruption during brown-out events due to 1 μA standby current and robust 5 ms write cycle timing. |
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/OT | Higher minimum VCC (2.5V), same 400 kHz speed, identical 8-lead SOT-23 package | Not rated for operation below 2.5V - unsuitable for 1.8V systems or battery-powered devices | Select only when system VCC ≥2.5V and extended low-voltage operation is unnecessary |
| 24FC16T-E/OT | 1 MHz I²C speed, same 1.7–5.5V range and 8-lead SOT-23 package, but no AEC-Q100 qualification | Lacks automotive qualification - limited to commercial/industrial use where AEC-Q100 is not mandated | Choose for higher-speed I²C buses where automotive reliability certification is not required |
Compared with 24LC16B-I/OT, 24AA16T-E/OT16KVAO enables lower-voltage operation critical for energy-constrained designs; versus 24FC16T-E/OT, it provides AEC-Q100 validation for automotive safety-critical storage while trading off peak I²C bandwidth for qualification assurance.
Availability
24AA16T-E/OT16KVAO is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, smart energy meters, and medical infusion pumps requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24AA16T-E/OT16KVAO 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 24AA16T-E/OT16KVAO belongs to Microchip's 24XX16 family of I²C serial EEPROMs, engineered specifically for reliable, low-power nonvolatile storage in automotive, industrial, and medical applications demanding extended temperature operation and high endurance.
FAQ
What is the minimum supply voltage required for reliable operation of the 24AA16T-E/OT16KVAO?
The 24AA16T-E/OT16KVAO operates reliably down to 1.7V across its full extended temperature range (–40°C to +125°C). Below 2.5V, the maximum I²C clock frequency is reduced to 100 kHz to maintain timing margins. This low-voltage capability allows direct integration into 1.8V systems without level-shifting circuitry, reducing BOM cost and board space.
How does the WP pin function on the 24AA16T-E/OT16KVAO, and what happens when it is left unconnected?
The WP pin on the 24AA16T-E/OT16KVAO must be actively driven to either VSS (enable writes) or VCC (disable writes). Leaving it unconnected is not recommended, as floating states may cause intermittent write protection failures. Internal weak pull-down is not present; external biasing ensures deterministic behavior during power-up and noise events.
Can the 24AA16T-E/OT16KVAO perform page writes across memory boundaries, and what occurs if it does?
No - the 24AA16T-E/OT16KVAO restricts page writes to within a single 16-byte physical page (addresses 0x00–0x0F, 0x10–0x1F, etc.). Attempting to cross a boundary causes the address pointer to wrap around to the start of the same page, overwriting earlier bytes. Application firmware must validate starting addresses and split multi-page writes to avoid data corruption.
What is the significance of the "E" suffix and "OT" package code in 24AA16T-E/OT16KVAO?
The "E" denotes Extended temperature grade (–40°C to +125°C), while "OT" specifies the 8-lead SOT-23 package with exposed thermal pad per JEDEC MO-178AA. The full part number confirms AEC-Q100 qualification, RoHS compliance, and tape-and-reel packaging (16K units per reel), enabling automated assembly in high-reliability production lines.
How many I²C slave addresses does the 24AA16T-E/OT16KVAO support, and why are A0–A2 pins absent?
The 24AA16T-E/OT16KVAO supports only one fixed I²C slave address (0xA0 for write, 0xA1 for read) because A0, A1, and A2 pins are not internally connected and omitted from the SOT-23 pinout. This simplifies bus arbitration in single-device configurations but requires external multiplexing for multiple EEPROMs on the same I²C bus.
24AA16T-E/OT16KVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 100 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 3.5 µs
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24AA16T-E/OT16KVAO FAQ
1.How can I place an order for 24AA16T-E/OT16KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA16T-E/OT16KVAO 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 24AA16T-E/OT16KVAO reliable?
The price and inventory of 24AA16T-E/OT16KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA16T-E/OT16KVAO is usually 5 days.
3.What payment methods are accepted for 24AA16T-E/OT16KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA16T-E/OT16KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA16T-E/OT16KVAO?
24AA16T-E/OT16KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA16T-E/OT16KVAO 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 24AA16T-E/OT16KVAO?
For technical support, including 24AA16T-E/OT16KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA16T-E/OT16KVAO requirements.
6.How does Aetrix verify that 24AA16T-E/OT16KVAO is sourced from the original manufacturer or authorized distributors?
All 24AA16T-E/OT16KVAO 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 24AA16T-E/OT16KVAO meets industry standards.
7.What is the process for return or replacement of 24AA16T-E/OT16KVAO?
All 24AA16T-E/OT16KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 24AA16T-E/OT16KVAO, 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 24AA16T-E/OT16KVAO part is unused and in its original packaging.
Return procedure for 24AA16T-E/OT16KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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