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Microchip Technology 34AA02T-I/SN
- Part No.:
- 34AA02T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
34AA02T-I/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,388
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Product details
Overview
34AA02T-I/SN from Microchip Technology is a 2 Kbit I²C-compatible serial EEPROM with software and hardware write protection, operating from 1.7V to 5.5V, supporting up to 400 kHz clock frequency, and rated for industrial temperature range (–40°C to +85°C). It features 16-byte page write buffer, 100 nA standby current, and Schmitt-trigger inputs for noise immunity in embedded control and sensor calibration applications.
For engineers reviewing the 34AA02T-I/SN datasheet, 34AA02T-I/SN pinout, 34AA02T-I/SN application, or 34AA02T-I/SN equivalent, this page delivers verified electrical parameters, validated I²C timing compliance, confirmed package mapping to SOIC-8, and two rigorously cross-referenced alternative parts with documented functional and application-level differences.
Technical Context
The 34AA02T-I/SN implements a 256 × 8-bit memory array organized as a single block, accessed via a bidirectional 2-wire I²C bus where it operates exclusively as a slave device. Its internal address pointer auto-increments during sequential reads, and write operations are governed by self-timed erase/write cycles with no external timing dependencies.
Write protection is implemented through three independent mechanisms: hardware (WP pin), resettable software (SWP/CSWP commands), and permanent software (PSWP command), each with distinct acknowledge behavior and voltage-level requirements-especially VHV detection on A0 for SWP/CSWP activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), enabling compact nonvolatile storage for calibration data or device configuration. |
| Supply voltage | 1.7V to 5.5V - supports direct interface with low-voltage microcontrollers and legacy 5V systems without level shifting. |
| I²C clock max | 400 kHz at VCC ≥ 1.8V - ensures compatibility with standard-mode I²C masters while maintaining timing margin. |
| Standby current | 100 nA typical - minimizes battery drain in always-on IoT edge nodes and portable instrumentation. |
| Endurance | 1 million erase/write cycles - guarantees long-term reliability in firmware update logging or parameter tuning loops. |
| Data retention | 200 years at 25°C - provides archival-grade persistence for factory-programmed identifiers or security keys. |
| Page write buffer | 16 bytes - reduces I²C transaction count when updating contiguous configuration blocks, improving bus efficiency. |
| ESD protection | >4 kV HBM - enhances robustness against handling-induced transients in manufacturing and field service environments. |
Pinout & Package
34AA02T-I/SN is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with 1.27 mm pitch, RoHS-compliant matte tin plating, and industrial-grade thermal performance (–40°C to +85°C).
| 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 enablement. |
| A1 | Chip select input | Part of 3-bit slave address; enables cascading up to eight devices on one I²C bus. |
| A2 | Chip select input | Part of 3-bit slave address; determines unique I²C slave address (1010 A2 A1 A0 R/W). |
| VSS | Ground reference | Return path for all internal logic and I/O; must be low-impedance to ensure noise immunity. |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; carries address, data, and ACK/NACK signals. |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; Schmitt-trigger input suppresses bus noise. |
| WP | Hardware write-protect input | Active-high signal: tied to VCC disables all writes to entire 256-byte array regardless of software state. |
| VCC | Power supply | Single 1.7–5.5V rail powers logic, memory, and I/O; internal VCC detector prevents writes below 1.35V. |
Key Features
| Feature | Design Value |
|---|---|
| Permanent software write-protect (PSWP) | Irreversibly locks lower 128 bytes (00h–7Fh); eliminates risk of accidental overwrite after factory programming. |
| Resettable software write-protect (SWP/CSWP) | Allows field-configurable protection of lower half-array using high-voltage command sequence on A0 pin. |
| Output slope control | Controls SDA rise/fall times to suppress ground bounce and reduce EMI in dense PCB layouts. |
| 100 nA standby current | Enables multi-year operation on coin-cell batteries in remote sensors and wearables without sleep-state management. |
| 16-byte page write buffer | Reduces required I²C transactions by up to 16× versus byte-write mode, lowering CPU overhead and bus contention. |
| Schmitt-trigger inputs | Provides 50 mV hysteresis on SCL/SDA/WP, rejecting noise spikes up to 50 ns duration without external filtering. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in pressure or flow sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and periodic recalibration routines. Use Value: Ensures measurement accuracy across temperature and lifetime without requiring external programming infrastructure. |
Use Scenario: Holding user-selectable therapy parameters, device ID, and audit logs in portable infusion pumps or glucose monitors. IC Role / Device Role / Timing Role: Secure, low-power parameter storage with hardware write-protection enabled during clinical operation. Use Value: Prevents unauthorized modification of safety-critical settings while supporting regulatory traceability requirements. |
| Automotive Body Control Module | Smart Home Edge Node |
Use Scenario: Retaining seat/mirror position memory, lighting profiles, and diagnostic fault codes in 12V automotive subsystems. IC Role / Device Role / Timing Role: I²C slave storing persistent user preferences and event history with brown-out safe write abort. Use Value: Maintains functionality after battery disconnect and survives load-dump transients due to VCC threshold detection. |
Use Scenario: Saving Wi-Fi credentials, OTA update status, and local automation rules in battery-powered Zigbee/Z-Wave end devices. IC Role / Device Role / Timing Role: Low-quiescent-power configuration store accessed only during boot or network rejoin events. Use Value: Extends shelf life and operational lifetime beyond 5 years on CR2032 cells using 100 nA standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | 2 Kbit I²C EEPROM, 1.7–5.5V, 1 MHz max clock, 1 μA standby current, no PSWP feature. | Lacks permanent software write-protect; requires external WP control logic for full-array lock. | Select when higher-speed writes (1 MHz) are needed and permanent protection is not required. |
| BR24G02NUX-10 | 2 Kbit I²C EEPROM, 1.6–5.5V, 400 kHz max clock, 150 nA standby, includes write-protect register but no VHV-based PSWP. | Uses register-based WP instead of hardware pin + PSWP; no high-voltage command activation. | Prefer for designs needing simplified WP control without high-voltage generation circuitry. |
Compared with AT24C02D-SSHM-T and BR24G02NUX-10, the 34AA02T-I/SN uniquely combines industrial-temp SOIC-8 packaging, 100 nA standby, and triple-layer write protection (hardware, resettable software, permanent software), making it optimal for safety-critical or tamper-resistant embedded deployments.
Availability
34AA02T-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart home edge nodes requiring stable component supply across extended product lifecycles.
Supply support for 34AA02T-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 solutions for industrial, automotive, and consumer markets.
The 34AA02T-I/SN belongs to Microchip's 34XX02 family of I²C EEPROMs designed specifically for robust, low-power, and secure nonvolatile data storage in space-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the 34AA02T-I/SN?
The 34AA02T-I/SN supports up to 400 kHz I²C clock frequency when VCC is 1.8V or higher. At VCC below 1.8V, the maximum clock rate drops to 100 kHz per the device's AC specifications. This dual-speed capability ensures interoperability with both legacy and modern I²C masters across its full 1.7–5.5V operating range.
Does the 34AA02T-I/SN support permanent write protection of memory contents?
Yes, the 34AA02T-I/SN supports Permanent Software Write-Protect (PSWP), which irreversibly locks the lower 128 bytes (addresses 00h–7Fh). Once executed, PSWP cannot be cleared by power cycling, command reversal, or WP pin state changes - providing tamper-proof storage for factory-programmed identifiers or cryptographic keys.
What package type is used for the 34AA02T-I/SN variant?
The 34AA02T-I/SN uses an 8-lead SOIC package (3.90 mm wide) with standard 1.27 mm lead pitch, RoHS-compliant matte tin plating, and industrial temperature rating (–40°C to +85°C). The "T" in the part number denotes SOIC packaging, and "I" specifies industrial temperature grade.
How does hardware write protection work on the 34AA02T-I/SN?
Hardware write protection on the 34AA02T-I/SN is controlled by the WP pin: when tied to VCC, the entire 256-byte memory array is locked against all write operations, regardless of software write-protect status. When WP is tied to VSS, hardware protection is disabled and software-based protection (SWP/PSWP) governs access.
What is the page write buffer size of the 34AA02T-I/SN, and how does it improve system efficiency?
The 34AA02T-I/SN has a 16-byte page write buffer. This allows up to 16 contiguous bytes to be loaded into the buffer and written in a single self-timed cycle (typ. 3 ms), reducing I²C transaction overhead by up to 16× compared to byte-wise writes - significantly lowering CPU utilization and bus congestion in configuration-intensive applications.
34AA02T-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:
- 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-SOIC
34AA02T-I/SN FAQ
1.How can I place an order for 34AA02T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 34AA02T-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 34AA02T-I/SN reliable?
The price and inventory of 34AA02T-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 34AA02T-I/SN is usually 5 days.
3.What payment methods are accepted for 34AA02T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34AA02T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 34AA02T-I/SN?
34AA02T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 34AA02T-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 34AA02T-I/SN?
For technical support, including 34AA02T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34AA02T-I/SN requirements.
6.How does Aetrix verify that 34AA02T-I/SN is sourced from the original manufacturer or authorized distributors?
All 34AA02T-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 34AA02T-I/SN meets industry standards.
7.What is the process for return or replacement of 34AA02T-I/SN?
All 34AA02T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 34AA02T-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 34AA02T-I/SN part is unused and in its original packaging.
Return procedure for 34AA02T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
34AA02T-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
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
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