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Microchip Technology AT24C01A-10PI-2.5
- Part No.:
- AT24C01A-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C01A-10PI-2.5.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,173
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Product details
Overview
AT24C01A-10PI-2.5 from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) serial EEPROM IC optimized for low-voltage embedded systems, featuring 2.5V to 5.5V supply operation, 100 kHz I²C interface speed, and hardware write protection via the WP pin. It delivers 1 million write cycles and 100-year data retention in industrial temperature range (−40°C to +85°C), commonly used for configuration storage in smart meters and industrial controllers.
For engineers reviewing the AT24C01A-10PI-2.5 datasheet, AT24C01A-10PI-2.5 pinout, AT24C01A-10PI-2.5 application, or AT24C01A-10PI-2.5 equivalent, key selection criteria include its 2.5V minimum VCC, 8-byte page write capability, SOIC/PDIP/TSSOP package compatibility, and industrial-grade reliability under extended temperature stress.
Technical Context
The AT24C01A-10PI-2.5 implements a standard two-wire (I²C-compatible) serial interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It uses hard-wired A0–A2 address pins to support up to eight devices on a single bus, and employs an open-drain SDA architecture compatible with wire-OR bus topologies.
Internally organized as 16 pages of 8 bytes each, it requires a 7-bit word address for random access. Write operations are self-timed with a maximum 10 ms cycle time, and the WP pin enables full-array hardware write protection when pulled high - a critical feature for firmware parameter integrity in field-deployed equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8), sufficient for storing calibration coefficients or device ID in compact microcontroller systems |
| Supply Voltage Range | 2.5V to 5.5V - supports direct interfacing with 2.5V/3.3V logic without level shifters |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures robust timing margin in noisy industrial environments |
| Write Cycle Time | ≤10 ms - defines minimum interval between successive byte/page writes during firmware updates |
| Endurance | 1 million write cycles - enables daily reconfiguration over 27+ years in maintenance-critical applications |
| Data Retention | 100 years at 25°C - guarantees long-term validity of stored security keys or calibration data |
| Operating Temperature | −40°C to +85°C - qualified for use in outdoor industrial enclosures and automotive body control modules |
Pinout & Package
AT24C01A-10PI-2.5 is available in 8-pin PDIP (8P3), JEDEC SOIC (8S1), and TSSOP (8T) packages - all with identical 8-lead pinout and 1.27 mm pitch. The "PI" suffix denotes Industrial temperature grade; "-2.5" specifies 2.5V minimum operating voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hard-wired inputs enabling up to eight AT24C01A-10PI-2.5 devices on one I²C bus; unused pins must be tied to VCC or GND |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up resistor; shares bus with other I²C peripherals |
| SCL | Serial Clock Input | Master-generated clock; rising edge samples data, falling edge drives data - defines I²C timing compliance |
| WP | Write Protect Control | Hardware-enforced full-array lock: logic high disables all writes, preserving stored configuration during power faults |
| VCC | Power Supply | 2.5V–5.5V input - powers internal logic and memory array; decoupling capacitor required per layout guidelines |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 2.5V | Enables direct integration with 2.5V FPGA I/O banks and ultra-low-power microcontrollers without voltage translation |
| 8-byte page write mode | Reduces firmware update time by up to 7× vs. byte-write - critical for minimizing system downtime during field upgrades |
| Schmitt-triggered, filtered inputs | Rejects >100 ns noise spikes on SDA/SCL lines - improves I²C bus immunity in motor-drive or relay-switching environments |
| Industrial temperature qualification | Validated operation across −40°C to +85°C - eliminates thermal derating concerns in unheated outdoor deployments |
| Hardware write protection (WP) | Prevents accidental or malicious overwrite of critical boot parameters - essential for secure boot and regulatory compliance |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff tables, meter calibration constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity across 100-year service life and 1M write cycles. Use Value: Eliminates need for battery-backed SRAM; WP pin prevents corruption during brown-out events common in grid-edge installations. |
Use Scenario: Holding I/O mapping, PID tuning parameters, and firmware version identifiers in programmable logic controllers. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent parameter storage accessible via microcontroller I²C peripheral. Use Value: Enables field reconfiguration without firmware reflashing; 2.5V operation matches 3.3V PLC backplane logic levels. |
| Automotive Body Control Module | Medical Diagnostic Device Calibration |
Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in 12V automotive BCMs with wide-input DC-DC supplies. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to 8-bit/16-bit MCU over I²C at 100 kHz. Use Value: −40°C to +85°C rating ensures reliability in engine bay proximity; WP pin locks factory-calibrated values post-assembly. |
Use Scenario: Storing sensor offset/gain coefficients and regulatory audit trails in portable ultrasound and ECG analyzers. IC Role / Device Role / Timing Role: Secure, long-life nonvolatile memory for FDA-required calibration persistence across device lifecycle. Use Value: 100-year data retention meets medical device traceability mandates; 2.5V operation aligns with low-power battery management subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C01C-SSHM-T | Same 1K-bit capacity, 1.7V–5.5V VCC range, and SOIC-8 package; newer revision with enhanced ESD tolerance (4 kV HBM). | Supports lower 1.7V operation - suitable for battery-powered wearables where AT24C01A-10PI-2.5's 2.5V min is marginal. | Select AT24C01C-SSHM-T only if 1.7V operation or higher ESD robustness is required; otherwise, AT24C01A-10PI-2.5 remains preferred for industrial temp stability. |
| ON Semiconductor CAT24C01HU4IGT3 | 1K-bit EEPROM in TSSOP-8; 1.8V–5.5V VCC; 100 kHz I²C; industrial temp; but no WP pin - write protection relies solely on software. | Lacks hardware write protect - unsuitable for safety-critical or tamper-resistant applications requiring physical lockout. | Choose CAT24C01HU4IGT3 only in cost-sensitive, non-security applications where software-controlled write enable suffices. |
Compared with AT24C01A-10PI-2.5, the AT24C01C-SSHM-T extends voltage range downward but offers no industrial temp advantage, while the CAT24C01HU4IGT3 sacrifices hardware write protection for lower cost - making AT24C01A-10PI-2.5 the optimal choice for ruggedized, security-aware industrial designs.
Availability
AT24C01A-10PI-2.5 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, automotive body control modules, and medical diagnostic calibration requiring stable component supply across extended temperature and voltage ranges.
Supply support for AT24C01A-10PI-2.5 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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a strong heritage in reliable, long-lifecycle components for industrial and automotive markets.
The AT24C01A-10PI-2.5 belongs to Microchip's legacy AT24Cxx serial EEPROM product line, designed specifically for robust, low-power, I²C-based configuration and calibration storage in harsh-environment embedded systems.
FAQ
What is the maximum clock frequency supported by AT24C01A-10PI-2.5 at 2.5V?
The AT24C01A-10PI-2.5 supports a maximum I²C clock frequency of 100 kHz when operated at 2.5V. This is specified in the AC Characteristics table under fSCL for 2.5V/2.7V/1.8V variants. The 400 kHz rating applies only to 5.0V operation, which is outside the voltage range of AT24C01A-10PI-2.5.
Does AT24C01A-10PI-2.5 support partial page writes?
Yes, AT24C01A-10PI-2.5 supports partial page writes within its 8-byte pages. The device allows writing 1 to 8 bytes consecutively starting at any address within a page boundary. If the write crosses a page boundary, the address wraps to the start of the same page - a behavior explicitly documented in the Page Write section of the datasheet.
What happens to the AT24C01A-10PI-2.5 when the WP pin is left floating?
The WP pin of AT24C01A-10PI-2.5 must not be left floating. Per the Pin Description and WP Pin Status table, WP is an active-high hardware write protect input. A floating state may result in indeterminate protection behavior - potentially allowing unintended writes or blocking all writes unpredictably. It must be actively driven to GND (enable writes) or VCC (disable writes).
Can AT24C01A-10PI-2.5 be used interchangeably with AT24C01A-10PI-2.7 in the same PCB layout?
Yes, AT24C01A-10PI-2.5 and AT24C01A-10PI-2.7 share identical pinout, package, and industrial temperature rating, and differ only in minimum supply voltage (2.5V vs. 2.7V) and corresponding AC/DC specs. They are footprint- and functionally compatible, though design validation at 2.5V–2.69V is required only for the -2.5 variant.
How many devices can share the same I²C bus with AT24C01A-10PI-2.5?
Up to eight AT24C01A-10PI-2.5 devices can share a single I²C bus, enabled by the three hardware address pins A0, A1, and A2. Each combination of A0–A2 logic levels generates a unique 3-bit device address, allowing distinct addressing without software configuration - a key advantage over single-address EEPROMs.
AT24C01A-10PI-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C01A-10PI-2.5 FAQ
1.How can I place an order for AT24C01A-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10PI-2.5 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 AT24C01A-10PI-2.5 reliable?
The price and inventory of AT24C01A-10PI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C01A-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C01A-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10PI-2.5?
AT24C01A-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10PI-2.5 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 AT24C01A-10PI-2.5?
For technical support, including AT24C01A-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C01A-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10PI-2.5 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 AT24C01A-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C01A-10PI-2.5?
All AT24C01A-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10PI-2.5, 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 AT24C01A-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C01A-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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