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Microchip Technology 34AA02-E/MS
- Part No.:
- 34AA02-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
34AA02-E/MS.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,872
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Product details
Overview
34AA02-E/MS from Microchip Technology is a 2 Kbit I²C-compatible serial EEPROM with hardware and dual software write-protection, operating from 1.7V to 5.5V, supporting 400 kHz clock rate, and rated for automotive temperature range (−40°C to +125°C). It features 16-byte page write buffer, 100 nA standby current, and Schmitt-trigger inputs for noise immunity in automotive body control modules and infotainment systems.
For engineers reviewing the 34AA02-E/MS datasheet, 34AA02-E/MS pinout, 34AA02-E/MS application, or 34AA02-E/MS equivalent, this page delivers verified electrical specs, validated pin functions, confirmed automotive-grade reliability data, and real-world use cases for secure configuration storage in harsh-temperature embedded systems.
Technical Context
The 34AA02-E/MS implements a 256 × 8-bit memory array accessed via a bidirectional 2-wire I²C bus, where it operates strictly as a slave device synchronized to an external master's SCL clock. Its internal address pointer auto-increments during sequential reads and supports current-address, random, and sequential read modes.
Write protection is enforced through three independent mechanisms: hardware-level WP pin assertion (entire array), resettable SWP command (lower 128 bytes), and permanent PSWP command (lower 128 bytes). All write cycles-including byte and page writes-are self-timed with typical duration of 3 ms and require ACK polling for completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) nonvolatile EEPROM array |
| Supply voltage | 1.7V–5.5V - enables direct interface with low-voltage MCUs and battery-backed systems |
| I²C clock rate | Up to 400 kHz - supports standard-mode I²C timing without requiring high-speed mode circuitry |
| Page write buffer | 16 bytes - reduces bus transaction count for multi-byte updates and improves firmware update efficiency |
| Endurance | 1 million erase/write cycles - ensures long-term reliability in frequent-configuration applications like calibration storage |
| Data retention | 200 years at +25°C - guarantees persistent storage integrity over full product lifecycle without refresh |
| Standby current | 100 nA typical - minimizes quiescent power draw in always-on automotive modules |
| Operating temperature | −40°C to +125°C (Automotive E-grade) - qualified for under-hood and infotainment subsystem deployment |
Pinout & Package
34AA02-E/MS is supplied in a 8-lead MSOP package (3.0 mm × 3.0 mm × 1.0 mm height), RoHS-compliant and Pb-free, with exposed pad option not applicable. Pin 1 is marked by a dot or bevelled corner; orientation follows standard MSOP pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input / VHV detection | Used for device addressing (A0–A2) and high-voltage detection during SWP/CSWP commands (VHV ≥7V) |
| A1 | Chip select input | Part of 3-bit slave address (1010 A2 A1 A0 R/W); enables up to eight devices on one I²C bus |
| A2 | Chip select input | Third bit of slave address; tied to VSS or VCC to configure unique I²C address |
| VSS | Ground reference | Primary return path for all internal logic and I/O; must be low-impedance connection to system GND plane |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ typical for 400 kHz); carries address, data, and ACK bits |
| SCL | Serial clock input | Master-generated clock synchronizing all I²C transactions; Schmitt-trigger input suppresses bus noise |
| WP | Hardware write-protect enable | Active-high signal: tied to VCC to lock entire memory array (00h–FFh) regardless of software state |
| VCC | Power supply | Single 1.7–5.5V rail powering EEPROM core, interface logic, and HV generator for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Dual software write-protection | Resettable SWP and permanent PSWP commands protect lower 128 bytes (00h–7Fh), enabling secure factory calibration storage |
| Noise-immune I²C interface | Schmitt-trigger inputs and 50 ns spike suppression on SDA/SCL ensure robust operation in electrically noisy automotive environments |
| Low-power operation | 100 nA standby current and 1 mA active read current extend battery life in always-on telematics and sensor nodes |
| Page write capability | 16-byte buffer allows efficient bulk writes with single Stop condition, reducing I²C bus occupancy vs. byte-by-byte writes |
| Automotive qualification | Rated for −40°C to +125°C ambient and qualified per AEC-Q100 stress test requirements for automotive electronics |
| ESD resilience | >4,000 V HBM rating protects against handling and system-level electrostatic discharge events |
Applications
| Automotive Body Control Module | Industrial Sensor Calibration Storage |
|---|---|
|
Use Scenario: Storing door lock configuration, mirror position presets, and seat memory settings in vehicle body control units. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent parameter storage across ignition cycles. Use Value: Enables user-customized vehicle settings retention without backup battery; automotive temperature rating ensures reliability under hood conditions. |
Use Scenario: Retaining factory-calibrated offset/gain coefficients for pressure, temperature, and current sensors in industrial PLCs. IC Role / Device Role / Timing Role: Secure, write-protected memory holding immutable calibration data referenced at sensor power-up. Use Value: Permanent Software Write-Protect (PSWP) prevents accidental or malicious overwrite of critical calibration values. |
| Smart HVAC Controller | Medical Device Configuration Backup |
|
Use Scenario: Saving user-defined fan speed profiles, temperature setpoints, and schedule timers in residential/commercial HVAC systems. IC Role / Device Role / Timing Role: Low-power I²C EEPROM interfacing directly with HVAC MCU for infrequent but persistent parameter storage. Use Value: 1.7V minimum VCC allows operation during brown-out conditions; 100 nA standby current extends backup battery life. |
Use Scenario: Backing up patient-specific therapy parameters (e.g., infusion rate, alarm thresholds) in portable medical pumps. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory storing configuration data that must survive power loss and meet regulatory retention requirements. Use Value: 200-year data retention and AEC-Q100-aligned reliability support long-term compliance with IEC 62304 and FDA design controls. |
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, 1.7–5.5V, 1 MHz max clock, no permanent software write-protect | Lacks PSWP feature; supports higher clock rate but offers only hardware WP and software lock for lower half | Select when higher-speed writes are needed and permanent protection of calibration data is not required |
| BR24G02FJ-3GE2 | 2 Kbit I²C EEPROM, 1.6–5.5V, 400 kHz, built-in error correction code (ECC), no PSWP | Includes ECC for enhanced data integrity; lacks permanent software write-protect and VHV-based command security | Prefer for mission-critical data where bit-flip immunity matters more than irreversible calibration locking |
Compared with AT24C02C-SSHM-T and BR24G02FJ-3GE2, the 34AA02-E/MS uniquely provides permanent software write-protection (PSWP) with hardware-enforced VHV activation-critical for tamper-resistant calibration storage-while maintaining identical 400 kHz timing and automotive temperature compliance.
Availability
34AA02-E/MS is available at Aetrix Electronics and suitable for automotive body control, industrial sensor calibration, smart HVAC, and medical device configuration backup requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 34AA02-E/MS 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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 34AA02-E/MS belongs to Microchip's 34XX02 family of automotive-grade serial EEPROMs, designed specifically for secure, low-power, and noise-immune nonvolatile storage in harsh-temperature embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the 34AA02-E/MS?
The 34AA02-E/MS supports up to 400 kHz I²C clock frequency across its full 1.7V–5.5V supply range. At VCC < 1.8V, the maximum clock rate drops to 100 kHz per datasheet DS22029F, Table 1-2. This ensures compatibility with standard-mode I²C masters without requiring high-speed mode support.
How does the permanent software write-protection (PSWP) function in the 34AA02-E/MS?
The PSWP command in the 34AA02-E/MS permanently locks addresses 00h–7Fh against write operations. Once executed, it cannot be cleared by power cycling, command reversal, or WP pin state changes. The 34AA02-E/MS will no longer acknowledge the 0110 device identifier used for write-protect commands after PSWP activation.
Is the 34AA02-E/MS pin-compatible with other packages in the 34XX02 family?
The 34AA02-E/MS in MSOP shares identical pinout and function mapping with the 34AA02-E/P (PDIP), 34AA02-E/SN (SOIC), and 34AA02-E/ST (TSSOP) variants. All use the same 8-pin arrangement: A0–A2, VSS, SDA, SCL, WP, VCC. SOT-23 variants differ (6-pin, no A2/WP) and are not pin-compatible.
What is the purpose of the VHV detection on the A0 pin of the 34AA02-E/MS?
The A0 pin in the 34AA02-E/MS serves dual roles: chip select input and high-voltage detection node. During SWP and CSWP command execution, VHV ≥7V must be applied to A0 to validate the write-protect instruction, preventing accidental activation under normal logic-level signaling conditions.
Does the 34AA02-E/MS support page write operations, and what is the buffer size?
Yes, the 34AA02-E/MS supports page write operations with a 16-byte internal buffer. Writes crossing physical page boundaries (every 16 bytes, starting at 00h, 10h, etc.) wrap within the current page instead of advancing to the next, requiring firmware to manage alignment-ensuring deterministic behavior during bulk updates.
34AA02-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
34AA02-E/MS FAQ
1.How can I place an order for 34AA02-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 34AA02-E/MS 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-E/MS reliable?
The price and inventory of 34AA02-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 34AA02-E/MS is usually 5 days.
3.What payment methods are accepted for 34AA02-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34AA02-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 34AA02-E/MS?
34AA02-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 34AA02-E/MS 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-E/MS?
For technical support, including 34AA02-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34AA02-E/MS requirements.
6.How does Aetrix verify that 34AA02-E/MS is sourced from the original manufacturer or authorized distributors?
All 34AA02-E/MS 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-E/MS meets industry standards.
7.What is the process for return or replacement of 34AA02-E/MS?
All 34AA02-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 34AA02-E/MS, 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-E/MS part is unused and in its original packaging.
Return procedure for 34AA02-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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