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Microchip Technology 24AA04HT-I/SN
- Part No.:
- 24AA04HT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA04HT-I/SN.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,792
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Product details
Overview
24AA04HT-I/SN from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 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 (100h–1FFh). It is used in embedded systems for storing calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 24AA04HT-I/SN datasheet, 24AA04HT-I/SN pinout, 24AA04HT-I/SN application, or 24AA04HT-I/SN equivalent, key selection criteria include low-voltage operation down to 1.7V, industrial temperature range (−40°C to +85°C), SOIC-8 narrow package compatibility, and half-array write-protection functionality.
Technical Context
The 24AA04HT-I/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes.
Write protection is controlled by the WP pin: tied to VSS enables full memory access; tied to VCC locks addresses 100h–1FFh against writes while permitting reads. The device uses self-timed erase/write cycles and supports acknowledge polling to determine write completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 × 8), split into two independent 256-word blocks for flexible addressing |
| Supply Voltage | 1.7V–5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V; 100 kHz at 1.7V ≤ VCC < 2.5V - ensures reliable timing across low-power and standard-speed I²C buses |
| Standby Current | 1 µA maximum (I-temp.) - critical for battery-powered devices requiring multi-year retention with minimal quiescent draw |
| Page Write Buffer | 16 bytes - reduces bus transactions by up to 16× versus byte-write mode, improving system throughput |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - suitable for field-updatable systems with infrequent but mission-critical writes |
| Write Protection | Hardware-enabled half-array lock (100h–1FFh) via WP pin - prevents accidental corruption of critical configuration data while allowing runtime updates to user space |
Pinout & Package
24AA04HT-I/SN is housed in an 8-lead plastic small outline (SOIC-N) package, 3.90 mm body width, with standard JEDEC MS-012AC footprint. Pin 1 is marked by a notch or beveled corner; leads are gull-wing, matte tin-plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection - may be left floating or tied to VSS/VCC without affecting operation |
| A1 | Address Input | No internal connection - unused; no impact on device addressing or functionality |
| A2 | Address Input | No internal connection - not bonded; irrelevant for 24AA04H family addressing scheme |
| VSS | Ground Reference | System return path for all internal logic and I/O; must be low-impedance for stable noise immunity |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2–10 kΩ); carries address, data, and ACK/NACK signals |
| SCL | Serial Clock Input | Master-generated clock synchronizing all transfers; Schmitt-trigger input rejects noise on rising/falling edges |
| WP | Write-Protect Control | Active-high enable for half-array lock: VCC = protect 100h–1FFh; VSS = full read/write access |
| VCC | Power Supply | Single supply input supporting 1.7V–5.5V; powers EEPROM core, interface logic, and internal charge pump |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.7V - eliminates need for voltage regulators in 1.8V MCU systems, reducing BOM count and power loss |
| I²C Bus Compatibility | Fully compliant with Philips I²C specification (100/400 kHz modes) - interoperable with standard microcontroller peripherals without custom drivers |
| Noise Immunity | Schmitt-trigger inputs + 50 ns input filter - rejects EMI spikes common in motor-driven or switching-power environments |
| Page Write Efficiency | 16-byte buffer with automatic address increment - cuts I²C transaction overhead by ~94% vs. byte writes for block updates |
| Hardware Write Protection | Dedicated WP pin controlling 2 Kbit protected region - prevents firmware corruption during brown-out or software faults without CPU intervention |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and linearization tables in pressure, temperature, or flow sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 200-year retention and 1M-cycle endurance for field recalibration events. Use Value: Eliminates need for external trimming components or rework; enables one-time calibration during production and secure field updates. | Use Scenario: Holding patient-specific therapy parameters, device serial numbers, and usage logs in portable infusion pumps or diagnostic monitors. IC Role / Device Role / Timing Role: Secure, low-power configuration memory with hardware write-protect to prevent unauthorized modification of safety-critical settings. Use Value: Meets IEC 62304 Class C software requirements by isolating immutable calibration data from runtime-modifiable fields. |
| Automotive Body Control Module | Smart Energy Metering |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12V automotive ECUs. IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM interfacing directly with 3.3V CAN/LIN microcontrollers over I²C. Use Value: Withstands automotive thermal cycling (−40°C to +85°C) and load-dump transients; WP pin safeguards factory defaults. | Use Scenario: Recording tariff schedules, meter firmware version, tamper-event timestamps, and billing history in utility-grade electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger with 1 µA standby current enabling 10+ year battery life in AMI endpoints. Use Value: Page-write capability allows full schedule update in single I²C transaction, minimizing MCU active time and power consumption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC04BHT-I/SN | Requires minimum 2.5V VCC; same 400 kHz speed, 1 µA standby, and SOIC-8 package | Not suitable for 1.8V systems; otherwise identical functional behavior and pinout | Select when operating exclusively above 2.5V and cost sensitivity favors legacy 24LC part numbering |
| AT24C04D-SSHM-T | Same 4-Kbit size, I²C interface, and SOIC-8 package; 1.7V–5.5V supply; 1 MHz max clock | Higher speed (1 MHz) but lacks hardware half-array write-protect; uses software-lock mechanism instead | Choose for faster write throughput where hardware WP is not required, or when sourcing from Microchip-independent supply chains |
Compared with 24AA04HT-I/SN, the 24LC04BHT-I/SN trades low-voltage support for broader legacy compatibility, while the AT24C04D-SSHM-T offers higher bandwidth but replaces dedicated hardware write-protection with software-managed locking - impacting safety-critical update reliability.
Availability
24AA04HT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 24AA04HT-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 leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24AA04H family was designed specifically for cost-sensitive, low-power embedded systems needing robust nonvolatile storage with simple I²C integration and hardware-level data protection.
FAQ
What is the operating voltage range of the 24AA04HT-I/SN?
The 24AA04HT-I/SN operates from 1.7V to 5.5V, enabling direct interface with 1.8V, 3.3V, and 5V microcontrollers. This wide range eliminates level-shifting circuitry in mixed-voltage designs and supports battery-powered applications down to single-cell lithium or alkaline sources. The 24AA04HT-I/SN maintains full I²C functionality and 400 kHz speed across this entire range when VCC ≥ 2.5V; below 2.5V, clock rate is limited to 100 kHz per AC specifications.
Does the 24AA04HT-I/SN support page writes, and what is the buffer size?
Yes, the 24AA04HT-I/SN supports page writes with a 16-byte buffer. This allows up to 16 consecutive bytes to be loaded into the on-chip buffer and written to memory in a single internal cycle after the host issues a STOP condition. Page writes reduce I²C bus overhead significantly compared to byte writes - for example, updating 16 bytes requires only one START/STOP sequence instead of 16 - improving system efficiency and minimizing MCU active time. The 24AA04HT-I/SN enforces physical page boundaries (16-byte alignment), so crossing a boundary causes wraparound within the current page.
How does the write-protect (WP) pin function on the 24AA04HT-I/SN?
The WP pin on the 24AA04HT-I/SN provides hardware-level write protection for the upper half of memory (addresses 100h–1FFh). When WP is tied to VCC, writes to that 2-Kbit region are inhibited while reads remain fully functional; tying WP to VSS enables full read/write access. This feature protects critical calibration or security data from accidental overwrite during firmware updates or power faults. Unlike software locks, the 24AA04HT-I/SN's WP mechanism requires no command sequence and remains active even if the host MCU fails or resets.
What is the endurance and data retention specification for the 24AA04HT-I/SN?
The 24AA04HT-I/SN guarantees a minimum of 1,000,000 erase/write cycles and greater than 200 years of data retention at 25°C. These figures are validated under worst-case conditions (5.5V, 25°C, page-mode writes) and reflect actual characterization - not extrapolated projections. The 24AA04HT-I/SN achieves this reliability through optimized oxide thickness and Fowler-Nordheim tunneling design, making it suitable for applications requiring decades of field service with infrequent but mission-critical updates, such as medical device calibration or energy meter firmware patches.
Is the 24AA04HT-I/SN pin-compatible with other packages in the 24XX04H family?
Yes, the 24AA04HT-I/SN in SOIC-8 (SN) package shares identical pinout and electrical behavior with all other 8-lead variants of the 24XX04H family - including MSOP, TSSOP, PDIP, TDFN, and UDFN - as confirmed in Table 2-1 of DS20002119C. All variants use the same A0–A2 (NC), VSS, SDA, SCL, WP, VCC arrangement. This allows drop-in replacement across form factors without PCB redesign, provided mechanical constraints (footprint, height, thermal pad) are verified. The 24AA04HT-I/SN specifically uses the SN package code per Microchip's marking table.
24AA04HT-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:
- 4Kbit
- Memory Organization:
- 256 x 8 x 2
- 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
24AA04HT-I/SN FAQ
1.How can I place an order for 24AA04HT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA04HT-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 24AA04HT-I/SN reliable?
The price and inventory of 24AA04HT-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 24AA04HT-I/SN is usually 5 days.
3.What payment methods are accepted for 24AA04HT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA04HT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA04HT-I/SN?
24AA04HT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA04HT-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 24AA04HT-I/SN?
For technical support, including 24AA04HT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA04HT-I/SN requirements.
6.How does Aetrix verify that 24AA04HT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA04HT-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 24AA04HT-I/SN meets industry standards.
7.What is the process for return or replacement of 24AA04HT-I/SN?
All 24AA04HT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA04HT-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 24AA04HT-I/SN part is unused and in its original packaging.
Return procedure for 24AA04HT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA04HT-I/SN Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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