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Microchip Technology AT34C02BY6-10YH-1.7
- Part No.:
- AT34C02BY6-10YH-1.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT34C02BY6-10YH-1.7.pdf
- Description:
- IC EEPROM 2KBIT I2C 8MINI MAP
- Quantity:
- Payment:
- Shipping:
Inventory:4,932
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Product details
Overview
AT34C02BY6-10YH-1.7 from Microchip Technology (formerly Atmel) is a 2 Kbit (256 × 8) two-wire serial EEPROM with permanent and reversible software write protection, hardware write protection via WP pin, and 1.7V to 3.6V low-voltage operation. It supports 100 kHz (at 1.7V) and 400 kHz (at 2.7V/3.6V) I²C-compatible interface, 16-byte page writes, and is packaged in an 8-lead Ultra Thin Mini-MAP (MLP 2×3 mm, 0.5 mm pitch). It is used in industrial sensor calibration storage and embedded system configuration retention.
For engineers reviewing the AT34C02BY6-10YH-1.7 datasheet, AT34C02BY6-10YH-1.7 pinout, AT34C02BY6-10YH-1.7 application, or AT34C02BY6-10YH-1.7 equivalent, this page delivers verified electrical specs, validated package mapping to MLP 2x3, confirmed write protection modes (PSWP/RSWP/WP pin), real-world endurance (1M cycles), and accurate timing parameters for I²C bus integration at 1.7V.
Technical Context
The AT34C02BY6-10YH-1.7 implements a two-wire (I²C) serial interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain SDA output. Its internal architecture includes a 256-word × 8-bit EEPROM array, address decoder (A0–A2), serial control logic, and dedicated write protect circuitry supporting three independent protection layers: permanent software (PSWP), reversible software (RSWP), and hardware (WP pin).
It operates across –40°C to +85°C with supply current as low as 0.6 µA standby (VCC = 1.7V) and supports byte/page write cycles with self-timed 5 ms max duration. The device uses internal high-voltage pump and data recovery circuitry to ensure reliable nonvolatile programming without external VPP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8), organized in 16 pages of 16 bytes - enables efficient page-write optimization in firmware updates. |
| Supply Voltage Range | 1.7 V to 3.6 V - supports direct interfacing with 1.8V and 3.3V microcontrollers without level-shifting. |
| I²C Clock Frequency | 100 kHz at 1.7V; 400 kHz at ≥2.7V - ensures compatibility with legacy and high-speed I²C masters. |
| Write Endurance | 1 million write cycles - suitable for frequent parameter logging or field calibration in industrial equipment. |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of stored configuration or calibration data. |
| Standby Current | 0.6 µA at 1.7V - minimizes power draw in battery-backed or energy-harvesting systems. |
| Write Cycle Time | Max 5 ms - defines minimum inter-write interval; critical for real-time firmware state capture. |
Pinout & Package
AT34C02BY6-10YH-1.7 is housed in an 8-lead Ultra Thin Mini-MAP (MLP 2×3 mm, 0.5 mm pitch, DFN-style dual no-lead package), RoHS-compliant with NiPdAu lead finish (denoted by "H" suffix). This compact, low-profile package supports automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware device address inputs | Enable up to eight AT34C02B devices on one I²C bus; must be hardwired to GND/VCC - floating pins default to GND but risk noise-induced misaddressing. |
| SDA | Serial data bidirectional I/O | Open-drain output requiring external pull-up; supports wire-OR with other I²C devices; Schmitt trigger input suppresses bus noise. |
| SCL | Serial clock input | Positive-edge sampled clock input; filtered for EMI resilience; determines maximum I²C throughput (100/400 kHz). |
| WP | Hardware write protect control | Active-high: ties entire array read-only; floating or GND enables software-controlled protection modes; critical for secure boot or factory calibration lock. |
| VCC | Power supply | 1.7–3.6V operation; decoupling capacitor required within 10 mm to maintain voltage stability during write cycles. |
| GND | Ground reference | Return path for all internal circuits; must connect to system ground plane with low-inductance trace to minimize noise coupling into SDA/SCL. |
Key Features
| Feature | Design Value |
|---|---|
| Permanent software write protection (PSWP) | Irreversibly locks first-half array (00H–7FH) after single command - prevents accidental or malicious overwrite of critical firmware parameters. |
| Reversible software write protection (RSWP) | Enables/disables first-half protection via dedicated I²C commands - allows field-serviceable calibration lock/unlock without hardware change. |
| Hardware write protection (WP pin) | Physically disables all writes when tied to VCC - provides tamper-evident, board-level security independent of firmware state. |
| 16-byte page write mode | Reduces I²C transaction overhead by up to 15× vs. byte writes - accelerates bulk configuration storage in production test or OTA updates. |
| Noise-suppressed inputs | Schmitt-trigger + filtering on SDA/SCL - eliminates false start/stop detection in electrically noisy industrial environments (e.g., motor drives, PLCs). |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Retention |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-up and during field recalibration; requires guaranteed 100-year data retention and 1M-cycle endurance. Use Value: Eliminates need for external calibration trimmers or host MCU flash wear management; PSWP locks factory-set values while RSWP allows authorized field updates. | Use Scenario: Holding user-defined network settings (IP, subnet, gateway) and UI preferences in smart HVAC controllers. IC Role / Device Role / Timing Role: I²C-configurable memory mapped to MCU's peripheral bus; accessed during boot and runtime via standard TWI driver. Use Value: Enables zero-touch provisioning and persistent settings across firmware upgrades; 1.7V operation supports brown-out-safe writes during power-down sequences. |
| Medical Device Parameter Archiving | Automotive Body Control Module (BCM) Trim Storage |
Use Scenario: Recording usage hours, service intervals, and diagnostic thresholds in portable patient monitors. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to ultra-low-power MCU; accessed infrequently but with absolute data integrity requirements. Use Value: Meets IEC 62304 Class C data retention mandates; WP pin hardwired to VCC during final test ensures immutable audit log storage. | Use Scenario: Storing seat/mirror position presets and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Automotive-grade (–40°C to +85°C) serial EEPROM sharing I²C bus with other body electronics; subject to ISO 11898 transients. Use Value: MLP 2×3 package fits tight space constraints behind dashboard; noise-filtered SDA/SCL withstands CAN-bus EMI; RSWP enables dealer reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT34C02C-Y6-T | Successor device with identical pinout, 1.7–5.5V range, enhanced ESD rating (4 kV HBM), and updated reliability testing; not drop-in due to different WP behavior under VCC=1.7V. | Recommended for new designs requiring extended voltage margin or higher robustness; not suitable where strict 1.7V-only operation is mandated. | Select AT34C02C-Y6-T if designing for long-term availability and broader supply voltage flexibility; verify WP pin response at 1.7V per its revised datasheet. |
| M95256-DFMN6TP | 256 Kbit SPI EEPROM (vs. 2 Kbit I²C); 1.8–5.5V; no software write protection; 5 ms write cycle; SO8 package only. | Used where higher density or SPI interface is preferred; lacks PSWP/RSWP features and 1.7V support - incompatible for low-voltage I²C systems. | Choose M95256-DFMN6TP only if migrating to SPI architecture and accepting loss of granular write protection; not a functional substitute for AT34C02BY6-10YH-1.7. |
Compared with AT34C02C-Y6-T, the AT34C02BY6-10YH-1.7 offers guaranteed 1.7V operation and legacy PSWP/RSWP implementation but lacks extended voltage headroom and newer qualification. Versus M95256-DFMN6TP, it provides I²C compatibility, sub-2V functionality, and multi-layer write protection - essential for safety-critical or ultra-low-power embedded use cases.
Availability
AT34C02BY6-10YH-1.7 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration retention, and medical device parameter archiving requiring stable component supply across extended product lifecycles.
Supply support for AT34C02BY6-10YH-1.7 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 acquired Atmel in 2016 and maintains full support for the AT34C02B family. The company specializes in microcontrollers, analog, and memory solutions for industrial, automotive, and consumer markets.
The AT34C02B series was designed for cost-sensitive, low-power embedded systems needing reliable, small-footprint nonvolatile storage with flexible write protection - particularly targeting programmable logic controllers, smart meters, and portable instrumentation.
FAQ
What is the operating voltage range of the AT34C02BY6-10YH-1.7?
The AT34C02BY6-10YH-1.7 operates from 1.7 V to 3.6 V. It is fully specified at 1.7 V (supporting 100 kHz I²C), making it suitable for direct connection to 1.8 V logic families without level shifters. The device draws only 0.6 µA standby current at 1.7 V, enabling use in battery-powered applications. This low-voltage capability is a core design feature distinguishing AT34C02BY6-10YH-1.7 from higher-voltage EEPROM alternatives.
Does the AT34C02BY6-10YH-1.7 support I²C standard-mode and fast-mode speeds?
Yes, the AT34C02BY6-10YH-1.7 supports 100 kHz I²C standard-mode operation at 1.7 V and 400 kHz fast-mode operation at 2.7 V and 3.6 V. Its AC timing parameters (tLOW, tHIGH, tSU.STA, etc.) are fully characterized across this range. The device includes Schmitt-triggered, filtered inputs to maintain signal integrity at both speeds in noisy environments. This dual-speed capability allows designers to optimize for power (100 kHz @ 1.7 V) or throughput (400 kHz @ 3.3 V) based on system requirements.
How does hardware write protection work on the AT34C02BY6-10YH-1.7?
Hardware write protection on the AT34C02BY6-10YH-1.7 is controlled by the WP pin: when tied to VCC, all write operations (byte, page, or write-protect register programming) are inhibited, protecting the full 2 Kbit array regardless of software protection status. When WP is GND or floating, software-based protection (PSWP/RSWP) becomes active. The AT34C02BY6-10YH-1.7 datasheet specifies that WP must be externally biased - floating connections are discouraged due to noise susceptibility, and 10 kΩ pull-down/up resistors are recommended.
What is the difference between permanent and reversible software write protection in the AT34C02BY6-10YH-1.7?
Permanent software write protection (PSWP) in the AT34C02BY6-10YH-1.7, once enabled via a dedicated 0110xxxx command, irreversibly locks the first 1 Kbit (addresses 00H–7FH); it survives power cycles and cannot be cleared. Reversible software write protection (RSWP) uses distinct commands (01100010 to set, 01100110 to clear) and can be toggled in-field. Both protect only the first half of the array, while the second half (80H–FFH) remains writable unless WP pin is asserted.
Which package type does the AT34C02BY6-10YH-1.7 use, and what are its key mechanical features?
The AT34C02BY6-10YH-1.7 uses the 8-lead Ultra Thin Mini-MAP (MLP 2×3 mm) package, also referenced as 8Y6. It measures 2.0 mm × 3.0 mm with 0.5 mm pitch, has no external leads (exposed pad-less DFN), and features NiPdAu lead finish (denoted by "H"). Its 0.6 mm max height enables ultra-thin PCB assemblies. This package is RoHS-compliant and optimized for high-density routing and automated optical inspection - critical for space-constrained industrial and medical devices.
AT34C02BY6-10YH-1.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-Mini Map (2x3)
AT34C02BY6-10YH-1.7 FAQ
1.How can I place an order for AT34C02BY6-10YH-1.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT34C02BY6-10YH-1.7 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 AT34C02BY6-10YH-1.7 reliable?
The price and inventory of AT34C02BY6-10YH-1.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT34C02BY6-10YH-1.7 is usually 5 days.
3.What payment methods are accepted for AT34C02BY6-10YH-1.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT34C02BY6-10YH-1.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT34C02BY6-10YH-1.7?
AT34C02BY6-10YH-1.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT34C02BY6-10YH-1.7 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 AT34C02BY6-10YH-1.7?
For technical support, including AT34C02BY6-10YH-1.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT34C02BY6-10YH-1.7 requirements.
6.How does Aetrix verify that AT34C02BY6-10YH-1.7 is sourced from the original manufacturer or authorized distributors?
All AT34C02BY6-10YH-1.7 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 AT34C02BY6-10YH-1.7 meets industry standards.
7.What is the process for return or replacement of AT34C02BY6-10YH-1.7?
All AT34C02BY6-10YH-1.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT34C02BY6-10YH-1.7, 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 AT34C02BY6-10YH-1.7 part is unused and in its original packaging.
Return procedure for AT34C02BY6-10YH-1.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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