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Microchip Technology AT24C32-10PC-2.5
- Part No.:
- AT24C32-10PC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C32-10PC-2.5.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,377
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Product details
Overview
AT24C32-10PC-2.5 from Microchip Technology (formerly Atmel) is a 32 Kbit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.5V to 5.5V with 10 ms max write cycle time, 1 million endurance cycles, and 100-year data retention. It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-voltage operation and hardware write protection.
For engineers reviewing the AT24C32-10PC-2.5 datasheet, AT24C32-10PC-2.5 pinout, AT24C32-10PC-2.5 application, or AT24C32-10PC-2.5 equivalent, key selection considerations include its 2.5V–5.5V supply range, 100 kHz I²C speed at 2.5V, 32-byte page write capability, WP pin hardware lock for upper quadrant, and PDIP-8 packaging with commercial temperature grade (0°C to 70°C).
Technical Context
The AT24C32-10PC-2.5 implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs, supporting bidirectional data transfer and device addressing via A0–A2 pins. It uses internal address counters for sequential reads and supports current-address, random-address, and sequential read modes.
Write operations are internally timed (tWR ≤ 10 ms), with byte and 32-byte page write modes enabled; acknowledge polling allows host synchronization post-write. The WP pin provides hardware-level protection of the upper 8K bits when driven high, while floating WP defaults to GND for full write access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of firmware parameters or calibration data in space-constrained designs |
| Supply Voltage Range | 2.5V to 5.5V - supports direct interfacing with 2.5V logic domains without level shifting |
| I²C Clock Frequency | 100 kHz maximum at 2.5V - ensures reliable communication in low-power, noise-sensitive industrial control nodes |
| Write Cycle Time | ≤10 ms - defines minimum interval between write commands; impacts real-time logging latency |
| Endurance | 1 million write cycles - guarantees long-term reliability in frequent-update applications like metering or sensor calibration |
| Data Retention | 100 years at +25°C - ensures persistent storage across product lifetime without refresh |
| Standby Current | 0.5 µA max at 2.5V - enables ultra-low-power operation in battery-backed systems |
Pinout & Package
AT24C32-10PC-2.5 is supplied in an 8-pin JEDEC PDIP package (0.300" wide), compatible with through-hole prototyping and legacy industrial PCBs. Pin 1 is marked by a notch or dot; leads are tin-lead plated per JEDEC MS-001 BA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight possible I²C addresses on shared bus; floating defaults to logic low |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor; supports wire-OR with other I²C devices |
| SCL | Serial Clock Input | Positive-edge clock-in / negative-edge clock-out timing reference; Schmitt trigger enables noise immunity |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables writes to upper 8K bits; floating or GND enables full memory access |
| VCC | Power Supply | 2.5V–5.5V input; powers internal logic and memory array; decoupling capacitor required near pin |
| GND | Ground Reference | Return path for all internal circuits; must be connected to system ground plane with low impedance |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables burst programming of up to 32 bytes per transaction, reducing I²C bus overhead and improving configuration update efficiency |
| Schmitt-triggered SCL/SDA inputs | Suppresses high-frequency noise on bus lines, eliminating need for external filtering in electrically noisy environments |
| Hardware write protect (WP) | Prevents accidental overwrites of critical firmware or calibration data without software intervention or power cycle |
| 100-year data retention | Eliminates need for periodic refresh or backup power in unattended deployments such as utility meters or remote sensors |
| Cascadable 2-wire architecture | Allows up to eight AT24C32-10PC-2.5 devices on one I²C bus using A0–A2 address pins, simplifying multi-node memory expansion |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-up initialization and runtime correction routines via I²C. Use Value: Enables field-replaceable sensor modules with persistent calibration data independent of host MCU firmware updates. | Use Scenario: Holding tariff schedules, billing registers, and tamper-event logs in electricity/water meters operating on 2.5V coin-cell backup. IC Role / Device Role / Timing Role: Low-power, write-protected memory for infrequently updated but mission-critical operational data. Use Value: Guarantees data integrity during brownouts via WP pin lock and survives >100 years without refresh, meeting ANSI C12.20 standards. |
| Embedded System Boot Configuration | Medical Device Settings Backup |
Use Scenario: Saving user-selected boot modes, display brightness, and network settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: I²C-configurable configuration store loaded at MCU reset before main application starts. Use Value: Allows zero-touch reconfiguration after firmware upgrades without requiring PC-based tools or JTAG access. | Use Scenario: Archiving patient-specific therapy parameters and usage history in Class IIa infusion pumps with battery backup. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory with hardware write lock to prevent corruption during power transitions. Use Value: Meets IEC 62304 safety requirements for data persistence and integrity under single-fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C32-WMN6TP | 32 Kbit, 2.5V–5.5V, 1 MHz I²C, SO-8 package, -40°C to +85°C industrial grade | Higher speed (1 MHz vs. 100 kHz) and extended temperature range; no PDIP option | Select when faster write throughput or wider ambient operation is required; verify layout compatibility with SO-8 footprint |
| BR24G32FJ-3GE2 | 32 Kbit, 1.7V–5.5V, 400 kHz I²C, TSSOP-8, -40°C to +105°C, built-in error correction | Wider voltage range, higher speed, enhanced reliability features; different pinout (SCL/SDA swapped) | Choose for automotive or high-reliability applications needing ECC and broader VCC tolerance; requires PCB redesign due to pin swap |
Compared with AT24C32-10PC-2.5, M24C32-WMN6TP offers faster I²C timing but lacks PDIP packaging, while BR24G32FJ-3GE2 adds error correction and voltage flexibility at the cost of pin compatibility and increased BOM complexity.
Availability
AT24C32-10PC-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded system boot configuration requiring stable component supply, long-lifecycle support, and through-hole assembly compatibility.
Supply support for AT24C32-10PC-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 focus on embedded control and connectivity.
The AT24Cxx series was designed specifically for low-voltage, low-power I²C-based configuration and data logging in industrial, medical, and consumer electronics where reliability and pin-count efficiency are critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C32-10PC-2.5?
The AT24C32-10PC-2.5 supports up to 100 kHz I²C clock frequency when operated within its 2.5V–5.5V supply range. This limit is specified for reliable timing margins at the 2.5V minimum VCC; higher speeds (e.g., 400 kHz) require ≥4.5V supply and are not guaranteed for AT24C32-10PC-2.5.
Does AT24C32-10PC-2.5 support partial page writes?
Yes, AT24C32-10PC-2.5 supports partial page writes: up to 32 bytes may be written starting at any address within a 32-byte boundary. If a write crosses a page boundary, the address rolls over to the start of the same page, overwriting prior data - this behavior is inherent to the device's internal address counter.
How does the WP pin function on AT24C32-10PC-2.5?
On AT24C32-10PC-2.5, the WP pin is active-high: when tied to VCC, it inhibits writes to the upper quadrant (8K bits) of memory; when tied to GND or left floating (internally pulled down), full memory write access is enabled. This provides hardware-level protection independent of firmware state.
What is the endurance rating of AT24C32-10PC-2.5?
The AT24C32-10PC-2.5 is rated for 1 million write cycles per memory location. This endurance specification applies under recommended operating conditions (2.5V–5.5V, 0°C to 70°C) and ensures long-term reliability in applications requiring frequent parameter updates, such as energy metering or sensor recalibration.
Is AT24C32-10PC-2.5 RoHS compliant?
Yes, AT24C32-10PC-2.5 is RoHS compliant and lead-free per Microchip's official product change notifications. The PDIP package uses matte tin plating, and the device meets EU Directive 2011/65/EU requirements without exemptions; full compliance documentation is available in Microchip's PCN archives.
AT24C32-10PC-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:
- 32Kbit
- Memory Organization:
- 4K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C32-10PC-2.5 FAQ
1.How can I place an order for AT24C32-10PC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32-10PC-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 AT24C32-10PC-2.5 reliable?
The price and inventory of AT24C32-10PC-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 AT24C32-10PC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C32-10PC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32-10PC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32-10PC-2.5?
AT24C32-10PC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32-10PC-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 AT24C32-10PC-2.5?
For technical support, including AT24C32-10PC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32-10PC-2.5 requirements.
6.How does Aetrix verify that AT24C32-10PC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C32-10PC-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 AT24C32-10PC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C32-10PC-2.5?
All AT24C32-10PC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32-10PC-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 AT24C32-10PC-2.5 part is unused and in its original packaging.
Return procedure for AT24C32-10PC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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