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Microchip Technology 24AA16HT-I/ST
- Part No.:
- 24AA16HT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA16HT-I/ST.pdf
- Description:
- IC EEPROM 16KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
24AA16HT-I/ST 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, 1 μA standby current, and hardware write-protect for the upper half-array (400h–7FFh). It is used in embedded systems for nonvolatile storage of calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 24AA16HT-I/ST datasheet, 24AA16HT-I/ST pinout, 24AA16HT-I/ST application, or 24AA16HT-I/ST equivalent, key selection criteria include low-voltage operation down to 1.7V, industrial temperature range (−40°C to +85°C), SOIC-8 package compatibility, and half-array write-protection functionality.
Technical Context
The 24AA16HT-I/ST implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-bit address pointer, 16-byte page write buffer, and HV generator for EEPROM programming.
It supports byte and page write operations with self-timed erase/write cycles (≤5 ms), ACK polling for bus efficiency, and hardware-based write protection via the WP pin-tied to VCC to lock addresses 400h–7FFh while allowing full read access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8), organized as eight 256-word blocks for flexible block-level addressing |
| Supply Voltage | 1.7V–5.5V - enables direct integration into ultra-low-power and mixed-voltage systems without level-shifting |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V; 100 kHz at 1.7V ≤ VCC < 2.5V - ensures reliable timing across wide voltage range |
| Write Cycle Time | ≤5 ms per byte or page - defines minimum interval between successive writes and impacts firmware update latency |
| Endurance | 1,000,000 erase/write cycles - supports long-term field deployment in logging and configuration applications |
| Data Retention | >200 years at 25°C - guarantees integrity of stored calibration or security keys over product lifetime |
| Operating Temp | −40°C to +85°C (Industrial grade) - validated for use in automotive ECUs, industrial controllers, and outdoor IoT nodes |
Pinout & Package
24AA16HT-I/ST is supplied in an 8-lead SOIC (SN) package, 3.90 mm body width, with standard JEDEC-compliant footprint and lead pitch of 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Return path for all internal circuitry; must be connected to system GND with low-impedance trace |
| WP | Hardware write-protect input | Logic-high disables writes to upper half-array (400h–7FFh); logic-low enables full read/write access |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transactions; requires external pull-up resistor |
| SDA | Serial data I/O | Bidirectional open-drain line for address/data transfer; requires external pull-up resistor (2–10 kΩ) |
| VCC | Power supply | Primary power rail; decoupling capacitor (0.1 μF) recommended within 10 mm of pin |
| A0, A1, A2 | No-connect pins | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.7V - eliminates need for voltage regulators in battery-powered designs |
| Page write buffer | 16-byte buffer enables burst writes without host intervention, reducing I²C bus occupancy by up to 94% vs. byte writes |
| Schmitt-trigger inputs | Hysteresis ≥0.05×VCC on SDA/SCL - rejects noise spikes up to 50 ns, improving robustness on long or noisy PCB traces |
| Half-array write-protect | Hardware-enforced lock on 400h–7FFh - prevents accidental overwrite of critical firmware or calibration data |
| ESD protection | >4 kV HBM - meets IEC 61000-4-2 Level 2 for system-level ESD immunity without external protection |
Applications
| Smart Metering | Automotive Body Control |
|---|---|
Use Scenario: Storing tariff tables, meter ID, and tamper logs in electricity/water/gas meters with 10+ year field life. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage IC with guaranteed 200-year data retention. Use Value: Eliminates need for backup batteries or supercapacitors; reduces BOM cost and board space vs. FRAM alternatives. | Use Scenario: Saving seat position memory, mirror presets, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: I²C slave EEPROM providing persistent user preference storage across ignition cycles. Use Value: Industrial temp rating (−40°C to +85°C) and AEC-Q100 qualification ensure reliability under under-hood thermal cycling. |
| Industrial PLC I/O Modules | Medical Diagnostic Equipment |
Use Scenario: Holding channel calibration coefficients and sensor offset values in modular analog input/output cards. IC Role / Device Role / Timing Role: Configuration storage device with hardware write-protect to prevent corruption during firmware updates. Use Value: Half-array protection (400h–7FFh) isolates factory-calibrated data from field-modifiable settings. | Use Scenario: Storing device serial number, calibration history, and usage counters in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory for regulatory-mandated audit trails and device identity. Use Value: 1 μA standby current extends battery life in handheld diagnostics; RoHS compliance supports global medical certifications. |
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/ST | Requires minimum 2.5V VCC; no 1.7V operation; same 400 kHz speed and SOIC-8 package | Not suitable for sub-2.5V battery systems; otherwise identical pinout and command set | Select only if system VCC ≥ 2.5V and lower quiescent current is not required |
| AT24C16C-SSHM-T | 1.7V–5.5V operation, 1 MHz max clock, but lacks hardware write-protect pin; uses software lock instead | Requires firmware implementation of write protection; higher speed benefits high-throughput logging | Choose when faster write throughput is prioritized over hardware-level data integrity assurance |
Compared with 24LC16B-I/ST, the 24AA16HT-I/ST enables true single-cell Li-ion or coin-cell operation; compared with AT24C16C-SSHM-T, it provides deterministic hardware-enforced protection for safety-critical configuration zones without software overhead.
Availability
24AA16HT-I/ST is available at Aetrix Electronics and suitable for smart metering, automotive body control, and industrial PLC I/O modules requiring stable component supply, long-life data retention, and industrial-grade temperature performance.
Supply support for 24AA16HT-I/ST 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 24AA16H family was designed specifically for cost-sensitive, low-power embedded systems needing reliable, pin-compatible I²C EEPROM with extended voltage range and hardware write protection.
FAQ
What is the maximum clock frequency supported by the 24AA16HT-I/ST?
The 24AA16HT-I/ST supports up to 400 kHz when VCC is 2.5V or higher. At supply voltages between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to maintain timing margin and signal integrity. This dual-speed capability allows seamless integration across diverse power domains without protocol changes.
Does the 24AA16HT-I/ST require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA16HT-I/ST has open-drain SDA and SCL pins and requires external pull-up resistors. Typical values are 10 kΩ for 100 kHz operation, 2 kΩ for 400 kHz, and 1 kΩ for marginal 1 MHz conditions. Resistor placement should be within 10 mm of the 24AA16HT-I/ST pins to minimize stub capacitance and ensure rise-time compliance.
How does the hardware write-protect feature work on the 24AA16HT-I/ST?
When the WP pin of the 24AA16HT-I/ST is tied to VCC, write operations to memory addresses 400h–7FFh (upper half-array) are disabled; reads remain fully functional. Tying WP to VSS enables full read/write access. This hardware lock operates independently of I²C commands and cannot be overridden by software, ensuring robust protection of critical data.
What is the endurance rating of the 24AA16HT-I/ST, and how is it measured?
The 24AA16HT-I/ST is rated for 1,000,000 erase/write cycles at 25°C and 5.5V, measured in page mode. Endurance is characterized-not 100% tested-and applies uniformly across all memory locations. Real-world endurance scales with operating voltage and temperature; Microchip's Total Endurance™ Model provides application-specific estimates based on actual stress conditions.
Is the 24AA16HT-I/ST AEC-Q100 qualified, and what grade does it meet?
Yes, the 24AA16HT-I/ST is AEC-Q100 qualified for Grade 3 (−40°C to +85°C), matching its industrial temperature rating. Qualification covers stress testing for temperature cycling, humidity bias, ESD, and accelerated life, confirming suitability for automotive body electronics, infotainment, and ADAS subsystems where reliability under thermal and electrical stress is mandatory.
24AA16HT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24AA16HT-I/ST FAQ
1.How can I place an order for 24AA16HT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA16HT-I/ST 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 24AA16HT-I/ST reliable?
The price and inventory of 24AA16HT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA16HT-I/ST is usually 5 days.
3.What payment methods are accepted for 24AA16HT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA16HT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA16HT-I/ST?
24AA16HT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA16HT-I/ST 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 24AA16HT-I/ST?
For technical support, including 24AA16HT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA16HT-I/ST requirements.
6.How does Aetrix verify that 24AA16HT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24AA16HT-I/ST 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 24AA16HT-I/ST meets industry standards.
7.What is the process for return or replacement of 24AA16HT-I/ST?
All 24AA16HT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA16HT-I/ST, 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 24AA16HT-I/ST part is unused and in its original packaging.
Return procedure for 24AA16HT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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