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Microchip Technology 34AA02-I/P
- Part No.:
- 34AA02-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
34AA02-I/P.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,823
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Product details
Overview
34AA02-I/P from Microchip Technology is a 2 Kbit I²C-compatible serial EEPROM with software and hardware write protection, operating from 1.7V to 5.5V, featuring 16-byte page write buffer, 400 kHz max clock (100 kHz below 1.8V), and 100 nA standby current. It supports industrial temperature range (–40°C to +85°C) and is used for secure storage of calibration data, configuration registers, and device identifiers in embedded control systems.
For engineers reviewing the 34AA02-I/P datasheet, 34AA02-I/P pinout, 34AA02-I/P application, or 34AA02-I/P equivalent, key selection criteria include low-voltage operation down to 1.7V, dual software write-protect modes (resettable and permanent), hardware WP pin for full-array protection, and compatibility with standard I²C bus timing at 100/400 kHz.
Technical Context
The 34AA02-I/P implements a 256 × 8-bit memory array organized as a single block, accessed via a bidirectional 2-wire I²C interface where it operates exclusively as a slave device. Its internal address pointer auto-increments during sequential reads, enabling contiguous byte streaming across the full 256-byte space.
Write protection is implemented through three independent mechanisms: hardware WP pin (VCC/VSS-tied), resettable Software Write-Protect (SWP/CSWP commands), and non-volatile Permanent Software Write-Protect (PSWP). All protection states affect acknowledge behavior during write attempts and are validated by dedicated high-voltage detection on A0 for SWP/CSWP execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), sufficient for firmware revision stamps, MAC address storage, or sensor calibration coefficients |
| Supply voltage | 1.7V to 5.5V - enables direct interface with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C clock rate | Up to 400 kHz (100 kHz when VCC < 1.8V) - compatible with standard-mode and fast-mode I²C masters |
| Page write buffer | 16 bytes - reduces write transaction count by up to 16× versus byte-write, lowering bus occupancy |
| Endurance | 1 million erase/write cycles - supports frequent field updates such as logging or parameter tuning |
| Data retention | 200 years at 25°C - ensures long-term integrity of stored configuration data across product lifetime |
| Standby current | 100 nA typical - critical for battery-powered IoT nodes and energy-harvesting applications |
Pinout & Package
34AA02-I/P is supplied in an 8-lead PDIP package (0.300" width), with lead finish Pb-free and RoHS compliant. Pin 1 is A0, and pin 8 is VCC; the package includes internal ESD protection (>4 kV) and Schmitt-trigger inputs on SCL/SDA/WP for robust noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input / VHV detection | Part of 3-bit slave address (A2–A0); also senses high-voltage (7–10 V) for SWP/CSWP command execution |
| A1 | Chip select input | Second bit of slave address; enables cascading up to eight devices on one I²C bus |
| A2 | Chip select input | Most significant chip select bit; determines device address offset within 0x50–0x57 range |
| VSS | Ground reference | Return path for all internal logic and I/O; must be low-impedance to support noise-suppressed operation |
| SDA | Open-drain bidirectional data line | Carries address, command, and data; requires external pull-up (2–10 kΩ) to VCC per I²C specification |
| SCL | Input clock line | Synchronizes all transfers; features Schmitt trigger and 50 ns spike filtering to reject bus noise |
| WP | Hardware write-protect enable | Active-high signal: tied to VCC locks entire 256-byte array; tied to VSS disables hardware protection |
| VCC | Power supply | Accepts 1.7–5.5 V; internal voltage detector disables writes if VCC drops below 1.35 V to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| Resettable software write-protect | Enables/disables protection of lower 128 bytes (00h–7Fh) via SWP/CSWP commands - supports field-upgradable configuration |
| Permanent software write-protect | Irreversibly locks lower 128 bytes after PSWP command - secures factory-set parameters against accidental or malicious overwrite |
| Output slope control | Controls SDA rise/fall edges to suppress ground bounce - eliminates signal integrity issues in dense PCB layouts |
| Self-timed write cycle | Automatically manages 5 ms internal erase/write timing - relieves host MCU of delay management and enables ACK polling |
| Contiguous multi-device addressing | Uses A2/A1/A0 bits as address bits A10–A8 to extend logical address space to 16 Kbit across eight devices - simplifies large-parameter storage |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
|
Use Scenario: Storing sensor offset/gain coefficients and serial number in a battery-powered environmental monitor. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up and firmware update cycles via I²C. Use Value: 100 nA standby current extends battery life; 1.7V operation ensures reliable boot at end-of-battery voltage. |
Use Scenario: Retaining FDA-mandated calibration constants and usage logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure parameter vault with permanent write-protection for regulatory-critical values. Use Value: PSWP mode prevents tampering with calibration data; 200-year data retention satisfies medical device lifecycle requirements. |
| Automotive Body Control Module | Smart Home Gateway |
|
Use Scenario: Saving user preferences (mirror position, seat settings) and fault history in a vehicle's BCM. IC Role / Device Role / Timing Role: Robust I²C slave supporting –40°C to +85°C operation and noise-immune bus communication. Use Value: Schmitt-trigger inputs and 50 ns spike filtering ensure reliable operation in electrically noisy automotive environments. |
Use Scenario: Holding Wi-Fi credentials, firmware version, and OTA update metadata in a cloud-connected hub. IC Role / Device Role / Timing Role: Configuration manager interfacing with host SoC over shared I²C bus alongside other peripherals. Use Value: Cascadable design (up to 8 devices) allows consolidated storage for multiple subsystems without bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02C-SSHM-T | 2 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max clock, 1 μA standby current, no permanent software write-protect | Lacks PSWP functionality; uses different write-protect register scheme; higher standby current | Choose when maximum clock speed (1 MHz) is required and permanent lock of lower array is unnecessary |
| ST24C02-WDT6-TR | 2 Kbit I²C EEPROM, 1.8–5.5 V, 400 kHz max clock, 5 μA standby current, hardware WP only (no SWP/PSWP) | Requires external hardware for partial-array protection; narrower VCC range excludes 1.7V operation | Choose for cost-sensitive designs where software-based protection layers are managed externally |
Compared with AT24C02C-SSHM-T and ST24C02-WDT6-TR, the 34AA02-I/P uniquely combines ultra-low 100 nA standby current, 1.7V minimum operation, and three-tiered write protection (hardware + resettable + permanent), making it optimal for safety-critical, low-power, and tamper-resistant applications.
Availability
34AA02-I/P is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, automotive body control modules, and smart home gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 34AA02-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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 34AA02-I/P belongs to Microchip's serial EEPROM product line, designed specifically for secure, low-voltage, and noise-resilient nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the minimum operating voltage for the 34AA02-I/P?
The 34AA02-I/P operates down to 1.7V, enabling direct integration with 1.8V logic families and extending functional lifetime in battery-powered applications where supply voltage declines over time. Below 1.7V, the internal voltage detector disables write operations to prevent data corruption, and the device remains readable until VCC drops below 1.35V.
How does hardware write protection work on the 34AA02-I/P?
Hardware write protection on the 34AA02-I/P is controlled by the WP pin: tying WP to VCC disables all write operations to the full 256-byte array, regardless of software protection state; tying WP to VSS disables hardware protection, allowing writes subject to software write-protect settings. This provides a physical, always-active layer of security that cannot be overridden by firmware.
Can the 34AA02-I/P be used in automotive applications?
The 34AA02-I/P is rated for industrial temperature range (–40°C to +85°C), not the extended automotive grade (–40°C to +125°C). For automotive use, Microchip offers the 34AA02-E/P variant - identical functionality but qualified to AEC-Q100 Grade 3. The 34AA02-I/P may be used in under-hood-adjacent or cabin modules where ambient temperature stays within its specified range.
What is the purpose of the A0 pin beyond chip addressing?
In addition to serving as the LSB of the 3-bit slave address, the A0 pin on the 34AA02-I/P functions as a high-voltage detection input for executing software write-protect commands (SWP, CSWP). Applying 7–10 V to A0 while issuing the correct control byte sequence triggers the internal programming circuitry, enabling secure activation or clearing of the lower-array protection flag.
Does the 34AA02-I/P support page write across memory boundaries?
No - the 34AA02-I/P restricts page writes to within a single 16-byte physical page (e.g., addresses 0x00–0x0F, 0x10–0x1F). Attempting a page write that crosses a boundary causes the address counter to wrap around to the start of the same page, overwriting previously loaded data. Application firmware must validate write addresses to avoid unintended data loss during multi-byte updates.
34AA02-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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 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
34AA02-I/P FAQ
1.How can I place an order for 34AA02-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 34AA02-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 34AA02-I/P reliable?
The price and inventory of 34AA02-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 34AA02-I/P is usually 5 days.
3.What payment methods are accepted for 34AA02-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34AA02-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 34AA02-I/P?
34AA02-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 34AA02-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 34AA02-I/P?
For technical support, including 34AA02-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34AA02-I/P requirements.
6.How does Aetrix verify that 34AA02-I/P is sourced from the original manufacturer or authorized distributors?
All 34AA02-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 34AA02-I/P meets industry standards.
7.What is the process for return or replacement of 34AA02-I/P?
All 34AA02-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 34AA02-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 34AA02-I/P part is unused and in its original packaging.
Return procedure for 34AA02-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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