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Microchip Technology 24AA16HT-I/SN
- Part No.:
- 24AA16HT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA16HT-I/SN.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,440
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Product details
Overview
24AA16HT-I/SN 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 half-array (400h–7FFh). It supports industrial temperature range (−40°C to +85°C) and is packaged in 8-lead SOIC (SN).
For engineers reviewing the 24AA16HT-I/SN datasheet, 24AA16HT-I/SN pinout, 24AA16HT-I/SN application, or 24AA16HT-I/SN equivalent, key selection criteria include low-voltage operation down to 1.7V, page write buffer (16 bytes), self-timed erase/write cycle (5 ms max), Schmitt-trigger inputs for noise immunity, and AEC-Q100 qualification for automotive use.
Technical Context
The 24AA16HT-I/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.
Write protection is implemented via the WP pin: tied to VSS enables full-array writes; tied to VCC disables writes to addresses 400h–7FFh while permitting reads across the entire 16-Kbit array. The device uses open-drain SDA/SCL with external pull-ups and incorporates slope control and input filtering to suppress ground bounce and noise spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8), organized as eight 256-word blocks for deterministic block-level addressing |
| Supply Voltage | 1.7V–5.5V - enables direct interface with 1.8V, 2.5V, 3.3V, and 5V systems without level-shifting |
| I²C Clock Frequency | Up to 400 kHz at VCC ≥ 2.5V; 100 kHz at 1.7V ≤ VCC < 2.5V - ensures timing compliance across voltage scaling |
| Page Write Buffer | 16-byte buffer - reduces bus transactions by up to 16× versus byte-write for contiguous data updates |
| Write Cycle Time | 5 ms maximum - defines minimum interval between write commands; self-timed, no host polling required |
| Data Retention | Greater than 200 years - guarantees long-term nonvolatile storage integrity in unpowered conditions |
| Endurance | 1 million erase/write cycles - supports frequent firmware parameter logging or configuration updates |
Pinout & Package
8-Lead SOIC (SN) package: 3.90 mm body width, 1.27 mm pitch, gull-wing leads, RoHS-compliant matte tin finish.
| 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 control | Logic-high disables writes to upper half (400h–7FFh); logic-low enables full-array write access |
| SCL | Serial clock input | Asynchronous master-generated clock synchronizing all I²C transfers; requires external pull-up |
| SDA | Serial data bidirectional I/O | Open-drain bus line for address/data transfer; requires external pull-up; supports ACK/NACK signaling |
| VCC | Power supply | Primary power input (1.7V–5.5V); decoupling capacitor (0.1 μF) recommended near pin |
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 0.05 VCC hysteresis on SDA/SCL - rejects sub-50 ns noise spikes and prevents false edge detection |
| Output slope control | Controlled rise/fall times - eliminates ground bounce during switching, critical for mixed-signal PCBs |
| Half-array hardware write-protect | Independent lock for 400h–7FFh region - enables secure storage of calibration data or firmware constants |
| 100/400 kHz I²C compatibility | Automatic timing adaptation based on VCC - maintains protocol compliance across 1.7V–5.5V supply range |
| ESD protection | >4 kV HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| Industrial Sensor Calibration Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-calibrated sensor offsets and gain coefficients in programmable logic controllers and environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up initialization via I²C; no real-time timing constraints. Use Value: Enables field-replaceable sensors with pre-loaded calibration data; 200-year retention ensures accuracy over equipment lifetime. | Use Scenario: Saving user preferences (seat position, mirror angle, climate settings) and fault logs in automotive BCMs. IC Role / Device Role / Timing Role: I²C slave storing persistent user data; accessed during ignition-on sequence and fault recording. Use Value: AEC-Q100 qualification ensures reliability under thermal cycling and vibration; half-array WP protects critical safety parameters. |
| Medical Device Configuration | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding regulatory-compliant device settings (alarm thresholds, measurement ranges) in portable diagnostic tools. IC Role / Device Role / Timing Role: Secure configuration store with write-protected calibration region; accessed during boot and diagnostics. Use Value: Hardware WP prevents accidental overwrite of FDA-mandated calibration values; 1M endurance supports frequent recalibration. | Use Scenario: Storing tariff schedules, metering constants, and tamper-event timestamps in utility-grade smart meters. IC Role / Device Role / Timing Role: Low-power I²C EEPROM updated infrequently but requiring guaranteed write integrity during brown-out. Use Value: 1.7V operation allows reliable writes during battery-backed backup mode; 5 ms write cycle minimizes power interruption window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC16BHT-I/SN | Requires minimum 2.5V VCC; same 400 kHz speed, identical pinout and memory map | Not suitable for 1.8V systems; otherwise drop-in replacement in 3.3V/5V designs | Select when operating exclusively above 2.5V and cost sensitivity outweighs low-voltage flexibility |
| 24FC16H-I/SN | Supports 1 MHz I²C clock; same 1.7V–5.5V range; different AC timing specs (e.g., THIGH = 260 ns) | Enables faster firmware updates in high-throughput production; requires timing validation at 1 MHz | Choose for bandwidth-critical applications where 1 MHz bus speed justifies revalidation |
Compared with 24LC16BHT-I/SN, the 24AA16HT-I/SN enables 1.7V operation for ultra-low-power systems; compared with 24FC16H-I/SN, it trades maximum speed (400 kHz vs. 1 MHz) for broader legacy timing compatibility and simpler timing margining.
Availability
24AA16HT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, and smart energy meter firmware parameter storage requiring stable component supply across extended product lifecycles.
Supply support for 24AA16HT-I/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products, with global design, manufacturing, and support infrastructure.
The 24AA16HT-I/SN belongs to Microchip's 24XX16H family of I²C EEPROMs, designed specifically for robust, low-power, and automotive-qualified nonvolatile data storage in space-constrained embedded systems.
FAQ
What is the minimum supply voltage required for reliable operation of the 24AA16HT-I/SN?
The 24AA16HT-I/SN operates reliably down to 1.7V across its full industrial temperature range (−40°C to +85°C). At VCC < 2.5V, the maximum I²C clock frequency is reduced to 100 kHz to maintain timing margins. This 1.7V capability enables direct integration with 1.8V logic families and battery-powered systems without voltage translation.
How does the hardware write-protect feature work on the 24AA16HT-I/SN?
The WP pin on the 24AA16HT-I/SN controls hardware write protection: when tied to VCC, writes to memory addresses 400h–7FFh (upper half of the 16-Kbit array) are disabled while reads remain fully functional; when tied to VSS, full-array write access is enabled. This provides immutable storage for calibration constants or security keys without software overhead.
Can the 24AA16HT-I/SN be used in automotive applications?
Yes, the 24AA16HT-I/SN is AEC-Q100 qualified for automotive use and rated for the industrial temperature range (−40°C to +85°C), making it suitable for body control modules, infotainment systems, and other non-safety-critical automotive subsystems requiring robust nonvolatile storage.
What is the maximum number of bytes that can be written in a single page write operation for the 24AA16HT-I/SN?
The 24AA16HT-I/SN supports a 16-byte page write buffer. A single page write command can transfer up to 16 contiguous bytes to the device before initiating the internal 5 ms write cycle. Attempting to write more than 16 bytes without a Stop condition causes address pointer rollover and data overwrite within the same page boundary.
Does the 24AA16HT-I/SN require external pull-up resistors on the SDA and SCL lines?
Yes, the 24AA16HT-I/SN has open-drain SDA and SCL pins and requires external pull-up resistors. Recommended values are 10 kΩ for 100 kHz operation, 2 kΩ for 400 kHz, and lower values for higher noise immunity - all referenced to VCC. Proper pull-up strength ensures valid logic levels and meets I²C rise time specifications.
24AA16HT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
24AA16HT-I/SN FAQ
1.How can I place an order for 24AA16HT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA16HT-I/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 24AA16HT-I/SN reliable?
The price and inventory of 24AA16HT-I/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 24AA16HT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA16HT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA16HT-I/SN?
24AA16HT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA16HT-I/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 24AA16HT-I/SN?
For technical support, including 24AA16HT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA16HT-I/SN requirements.
6.How does Aetrix verify that 24AA16HT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA16HT-I/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 24AA16HT-I/SN meets industry standards.
7.What is the process for return or replacement of 24AA16HT-I/SN?
All 24AA16HT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA16HT-I/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 24AA16HT-I/SN part is unused and in its original packaging.
Return procedure for 24AA16HT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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