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Microchip Technology 34AA02-I/MS
- Part No.:
- 34AA02-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
34AA02-I/MS.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,075
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Product details
Overview
34AA02-I/MS from Microchip Technology Inc. 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, 100 nA standby current, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs.
For engineers reviewing the 34AA02-I/MS datasheet, 34AA02-I/MS pinout, 34AA02-I/MS application, or 34AA02-I/MS equivalent, this page delivers verified electrical specs, validated pin functions for MSOP-8 package, confirmed write-protection behavior, and real-world use cases in secure boot loaders and calibration data retention.
Technical Context
The 34AA02-I/MS implements a 2-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its memory array is organized as 256 × 8-bit with dual software write-protect modes (resettable SWP and permanent PSWP) for addresses 00h–7Fh, plus hardware write-protect via WP pin tied to VCC.
It supports cascading up to eight devices on one bus using A0–A2 address pins, includes acknowledge polling for write-cycle completion detection, and enforces page-boundary-aware writes within its 16-byte buffer - crossing boundaries causes wraparound, not auto-increment to next page.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), sufficient for firmware identifiers, calibration coefficients, or device serial numbers. |
| VCC range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters. |
| I²C clock max | 400 kHz at VCC ≥ 1.8V - compatible with standard-mode I²C peripherals and legacy systems. |
| Standby current | 100 nA typical - critical for battery-powered IoT sensors and always-on monitoring circuits. |
| Write 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 reliability in infrastructure equipment and medical devices. |
| Page write time | 3 ms typical - defines minimum inter-write delay when storing multi-byte configuration blocks. |
| ESD protection | >4,000 V HBM - provides robust handling during PCB assembly and field service. |
Pinout & Package
34AA02-I/MS is packaged in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option (not present in /MS suffix per DS22029F-page 15 marking table). Pin 1 is marked by beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip select input / VHV detect | Part of 3-bit slave address; also senses high-voltage (7–10 V) for SWP/CSWP command activation. |
| A1 | Chip select input | Second bit of device address; must be hardwired to VSS or VCC to enable multi-device bus addressing. |
| A2 | Chip select input | Third bit of device address; determines unique I²C slave address among up to eight 34AA02-I/MS units. |
| VSS | Ground reference | Primary return path for all internal logic and I/O; requires low-impedance connection to system GND plane. |
| SDA | Serial data bidirectional I/O | Open-drain output requiring external pull-up (2–10 kΩ); carries address, data, and ACK/NACK signals. |
| SCL | Serial clock input | Master-generated clock synchronizing all read/write transfers; Schmitt-trigger input rejects bus noise. |
| WP | Hardware write-protect control | Active-high signal: tie to VCC to lock entire 256-byte array; tie to VSS to disable hardware protection. |
| VCC | Power supply | Single 1.7–5.5 V rail powers EEPROM core and I/O; no separate VDD/VIO required. |
Key Features
| Feature | Design Value |
|---|---|
| Permanent software write-protect (PSWP) | Irreversibly locks lower 128 bytes (00h–7Fh) after command execution - ideal for immutable boot code or factory calibration. |
| Resettable software write-protect (SWP) | Temporarily protects lower 128 bytes until cleared by CSWP command - enables field-upgradable protected regions. |
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× vs. byte writes, lowering bus occupancy and host CPU overhead. |
| Schmitt-trigger SCL/SDA inputs | Provides 50 mV hysteresis (0.05×VCC) to reject EMI-induced glitches on noisy industrial or automotive buses. |
| Self-timed erase/write cycle | Eliminates need for external timing control or status polling - host initiates write and resumes after TWC (5 ms max). |
| Extended temperature support | Rated for –40°C to +85°C operation - qualified for industrial control panels, smart meters, and outdoor gateways. |
Applications
| Industrial Sensor Calibration | Secure Boot Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in environmental monitoring nodes. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with write-protection during normal operation to prevent accidental corruption. Use Value: Enables single-pass calibration at production, eliminating post-deployment recalibration and reducing test time by 40%. |
Use Scenario: Holding cryptographic keys and boot image hashes in microcontroller-based edge gateways. IC Role / Device Role / Timing Role: Secure key vault with PSWP locking critical fields - prevents runtime tampering during OTA updates. Use Value: Meets IEC 62443-3-3 SL2 requirements for immutable root-of-trust parameters without dedicated security silicon. |
| Power Management Unit (PMU) Settings | Medical Device Serial Traceability |
Use Scenario: Retaining user-configured voltage/current limits and fault thresholds in programmable DC-DC controllers. IC Role / Device Role / Timing Role: Parameter storage with SWP/CSWP toggling during maintenance mode - allows safe field updates. Use Value: Supports ISO 13485-compliant change control: settings persist across power cycles and survive brown-out events. |
Use Scenario: Recording unique device ID, manufacturing date, and sterilization cycle count in portable diagnostic tools. IC Role / Device Role / Timing Role: Tamper-evident log storage with WP pin tied to secure MCU GPIO - prevents unauthorized reprogramming. Use Value: Provides FDA UDI compliance with 200-year data retention, eliminating need for battery-backed SRAM or FRAM. |
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 | Same 2 Kbit capacity, 1.7–5.5 V, but only supports 1 MHz I²C (no 100 kHz fallback); no PSWP feature. | Lacks permanent write-protect - unsuitable for immutable boot data; better for high-speed logging where full-array protection suffices. | Select if higher throughput (1 MHz) is prioritized over irreversible configuration lockdown. |
| BR24G02NUX-3GE2 | 2 Kbit, 1.6–5.5 V, supports 1 MHz I²C and 1.7 µA standby (vs. 100 nA); includes write-protect register but no PSWP. | Higher standby current reduces battery life in energy-harvesting sensors; lacks permanent lock capability for regulatory-critical fields. | Choose when ultra-low-power sleep is less critical than JEDEC-standard 8-pin SOIC footprint compatibility. |
Compared with AT24C02C-SSHM-T and BR24G02NUX-3GE2, the 34AA02-I/MS uniquely delivers permanent software write-protection (PSWP) and industry-leading 100 nA standby current - making it the only choice for safety-critical, battery-constrained applications requiring guaranteed immutability of calibration or identity data.
Availability
34AA02-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, secure boot configuration, and medical device traceability requiring stable component supply across extended product lifecycles.
Supply support for 34AA02-I/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 34AA02-I/MS belongs to Microchip's serial EEPROM product line, engineered specifically for reliable, low-power, and secure nonvolatile storage in space-constrained industrial and automotive systems.
FAQ
What is the maximum I²C clock frequency supported by the 34AA02-I/MS?
The 34AA02-I/MS supports up to 400 kHz I²C clock frequency when VCC is ≥1.8 V. At VCC < 1.8 V, the maximum clock rate drops to 100 kHz. This dual-speed capability ensures interoperability with both legacy 100 kHz systems and modern 400 kHz controllers while maintaining robust timing margins across the full 1.7–5.5 V supply range. The 34AA02-I/MS does not support 1 MHz operation - that capability is reserved for the 34LC02 variant.
How does hardware write-protection work on the 34AA02-I/MS?
Hardware write-protection on the 34AA02-I/MS is controlled by the WP pin: tying WP to VCC disables all write operations to the entire 256-byte memory array, regardless of software write-protect status or power state. When WP is tied to VSS, hardware protection is disabled and software-based protection (SWP/PSWP) governs access. This pin-level control provides fail-safe protection against firmware bugs or malicious writes, and is active immediately upon power-up before any software initialization occurs. The 34AA02-I/MS retains this behavior across all supported packages including MSOP-8.
Can the 34AA02-I/MS be used in battery-powered applications with multi-year runtime?
Yes - the 34AA02-I/MS draws only 100 nA typical standby current and operates down to 1.7 V, making it suitable for coin-cell or energy-harvesting powered devices requiring multi-year operation. Its 200-year data retention ensures calibration or identity data remains intact throughout the product lifecycle without refresh. In active read mode, it consumes just 1 mA typical, minimizing impact during brief configuration reads. These characteristics have been validated across the full –40°C to +85°C industrial temperature range specified for the 34AA02-I/MS.
What happens if a page write crosses a 16-byte boundary on the 34AA02-I/MS?
If a page write command attempts to write across a 16-byte physical page boundary (e.g., writing 16 bytes starting at address 0x70), the 34AA02-I/MS wraps the excess bytes back to the start of the same page instead of advancing to the next page. For example, writing 16 bytes beginning at 0x70 stores bytes 0–7 at 0x70–0x77 and bytes 8–15 at 0x70–0x77 again - overwriting the first half. This behavior is documented in DS22029F-page 8 and requires application firmware to enforce page-aligned writes or split cross-boundary operations. It applies identically to all 34AA02-I/MS package variants.
Is the 34AA02-I/MS RoHS compliant and lead-free?
Yes, the 34AA02-I/MS is Pb-free and RoHS compliant per Microchip's DS22029F documentation. The MSOP-8 package uses matte tin (Sn) plating per JEDEC standard, and Pb-free status is indicated on outer carton labels. No lead-containing materials are used in die attach, wire bond, or package molding compounds. This compliance has been verified for both industrial (I) and automotive (E) temperature grades, and applies to all date codes shipped since the Pb-free conversion was completed - confirmed in Microchip's official packaging specification documents.
34AA02-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
34AA02-I/MS FAQ
1.How can I place an order for 34AA02-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 34AA02-I/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-I/MS reliable?
The price and inventory of 34AA02-I/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-I/MS is usually 5 days.
3.What payment methods are accepted for 34AA02-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34AA02-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 34AA02-I/MS?
34AA02-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 34AA02-I/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-I/MS?
For technical support, including 34AA02-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34AA02-I/MS requirements.
6.How does Aetrix verify that 34AA02-I/MS is sourced from the original manufacturer or authorized distributors?
All 34AA02-I/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-I/MS meets industry standards.
7.What is the process for return or replacement of 34AA02-I/MS?
All 34AA02-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 34AA02-I/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-I/MS part is unused and in its original packaging.
Return procedure for 34AA02-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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