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Microchip Technology AT24C32-10PI-2.5
- Part No.:
- AT24C32-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C32-10PI-2.5.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,974
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Product details
Overview
AT24C32-10PI-2.5 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in embedded systems for configuration storage, calibration data logging, and firmware parameter backup.
For engineers reviewing the AT24C32-10PI-2.5 datasheet, AT24C32-10PI-2.5 pinout, AT24C32-10PI-2.5 application, or AT24C32-10PI-2.5 equivalent, key selection considerations include its industrial temperature range (–40°C to +85°C), 2.5V minimum supply, 32-byte page write capability, and PDIP/SOIC/TSSOP package compatibility across voltage variants.
Technical Context
The AT24C32-10PI-2.5 implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal address counter supports current-address, random-address, and sequential read modes, while device addressing uses A0–A2 pins to enable up to eight devices on one bus.
Write operations are internally timed (max 10 ms), with byte and 32-byte page write modes supported. Hardware write protection isolates the upper quadrant (8K bits) when WP is tied high, and acknowledge polling enables host synchronization without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 words × 8 bits); sufficient for storing device IDs, sensor calibration tables, or boot configuration registers. |
| Supply Voltage Range | 2.5V to 5.5V; enables direct integration into 2.5V, 3.3V, and 5V logic domains without level shifting. |
| I²C Clock Frequency | 100 kHz max at 2.5V; ensures reliable communication in electrically noisy industrial environments. |
| Write Cycle Time | ≤10 ms; defines minimum interval between write commands and impacts firmware update latency. |
| Endurance | 1 million write cycles; supports frequent recalibration or logging in field-deployed equipment. |
| Data Retention | 100 years at +25°C; guarantees long-term integrity of stored settings across product lifetime. |
| Operating Temperature | –40°C to +85°C; qualified for industrial control, automotive body electronics, and outdoor metering. |
Pinout & Package
AT24C32-10PI-2.5 is supplied in an 8-pin PDIP (package code 8P3) per JEDEC MS-001 BA, with 0.300" body width and through-hole mounting. Pin 1 is marked by notch or dot; leads are tin-lead plated and RoHS-compliant per manufacturer documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight unique I²C addresses (0x50–0x57); enables multi-device bus topology. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor and supports wire-OR with other I²C peripherals. |
| SCL | Serial Clock Input | Positive-edge clock-in / negative-edge clock-out; Schmitt-trigger input suppresses EMI-induced glitches. |
| WP | Write Protect Control | Active-high signal; when tied to VCC, blocks writes to upper 8K bits-critical for safeguarding factory defaults. |
| GND | Ground Reference | Signal and power return path; must be low-impedance to maintain I²C signal integrity and noise immunity. |
| VCC | Power Supply | Primary supply input; decoupling capacitor (0.1 µF ceramic) required within 1 cm for stable 2.5V–5.5V operation. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Reduces firmware update time by enabling burst writes without repeated start/stop overhead-ideal for parameter block saves. |
| Hardware write protection (WP pin) | Prevents accidental overwrites of critical memory regions during power-up transients or software faults-no firmware dependency. |
| 100-year data retention | Eliminates need for periodic refresh or battery-backed SRAM in maintenance-free deployments like utility meters or building controllers. |
| Industrial temperature grade (–40°C to +85°C) | Validated for continuous operation in harsh environments including factory floors, transportation systems, and outdoor infrastructure. |
| ESD protection >3,000V | Withstands handling and board-level ESD events without latch-up or parametric shift-reduces test yield loss during assembly. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, pulse count logs, and tamper-event timestamps in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration and event log storage with guaranteed data integrity across 15+ year field life. Use Value: Enables compliance with IEC 62056 standards via deterministic 100-year retention and 1M-cycle endurance under daily write loads. | Use Scenario: Holding I/O mapping tables, PID tuning parameters, and firmware update flags in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent parameter storage accessible via microcontroller's I²C peripheral during boot and runtime reconfiguration. Use Value: Supports zero-downtime field updates and retains calibrated values after brownouts-critical for process continuity. |
| Automotive Body Control Module | Medical Device Calibration Storage |
Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in 12V vehicle subsystems with wide input voltage variation. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3V MCU; WP pin tied to ignition-sensed rail for write lock during cranking. Use Value: Operates reliably down to 2.5V during cold-cranking dips while preserving user preferences across battery disconnects. | Use Scenario: Archiving sensor offset/gain coefficients and regulatory audit trails in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, long-life storage for FDA-required calibration history with hardware-enforced write protection on factory-set values. Use Value: Meets ISO 13485 traceability requirements via immutable upper-quadrant write lock and 100-year retention evidence. |
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 | 32K I²C EEPROM, 2.5V–5.5V, SO8 package, 100 kHz max, industrial temp (–40°C to +85°C), same 32-byte page size and WP pin. | No PDIP option; only available in SO8 (8S1) and TSSOP8 (8T); identical timing and command set. | Select when SOIC/TSSOP footprint is preferred and through-hole mounting is not required. |
| BR24G32FJ-WE2 | 32K I²C EEPROM, 1.7V–5.5V, 8-pin SOP, industrial temp, 1 MHz max clock (at ≥2.5V), 32-byte page, WP pin. | Higher-speed I²C support (up to 1 MHz) but requires stricter rise/fall time control; different device address map (0x50–0x57 vs 0x50–0x57). | Choose for faster firmware updates where bus timing margins allow; verify SCL/SDA slew rate compliance. |
Compared with M24C32-WMN6TP and BR24G32FJ-WE2, the AT24C32-10PI-2.5 uniquely offers PDIP packaging and proven legacy interoperability in existing industrial designs-making it optimal for drop-in replacement in legacy PCBs requiring through-hole assembly.
Availability
AT24C32-10PI-2.5 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and automotive body electronics requiring stable component supply across extended temperature and voltage ranges.
Supply support for AT24C32-10PI-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 broad industrial and automotive qualification expertise.
The AT24C32 series was designed for robust, low-power, I²C-based configuration and data logging in space-constrained embedded systems-emphasizing reliability, voltage flexibility, and ease of integration.
FAQ
What is the maximum I²C clock frequency supported by AT24C32-10PI-2.5?
The AT24C32-10PI-2.5 supports up to 100 kHz I²C clock frequency when operating at 2.5V. This limit is defined by AC timing parameters tLOW, tHIGH, and tBUF in the datasheet and ensures reliable noise-immune communication in industrial environments. Higher speeds (e.g., 400 kHz) require ≥4.5V supply and are not rated for this specific variant.
Does AT24C32-10PI-2.5 support partial page writes?
Yes, AT24C32-10PI-2.5 supports partial page writes: up to 32 bytes can be written in a single page write cycle, and the internal address counter auto-increments only within the current 32-byte boundary. If more than 32 bytes are sent, the address rolls over to the start of the same page-enabling flexible buffer-aligned writes without prior erase.
How does the Write Protect (WP) pin function on AT24C32-10PI-2.5?
On AT24C32-10PI-2.5, the WP pin is active-high: when tied to VCC, it disables write access to the upper quadrant (8K bits, addresses 0x2000–0x3FFF); when grounded or left floating (internally pulled down), full memory is writable. This provides hardware-level protection for factory-calibrated data independent of firmware state.
What package types are available for AT24C32-10PI-2.5?
AT24C32-10PI-2.5 is specifically offered in the 8-pin PDIP (8P3) package per JEDEC MS-001 BA. While other variants like AT24C32-10SI-2.5 exist in SOIC and TSSOP, the "PI" suffix denotes industrial-grade PDIP packaging-confirmed in the Ordering Information table on page 10 of the datasheet.
Is AT24C32-10PI-2.5 compatible with 1.8V I²C buses?
No, AT24C32-10PI-2.5 is not rated for 1.8V operation. Its "-2.5" suffix specifies a 2.5V–5.5V supply range. For 1.8V systems, Microchip offers the AT24C32-10PI-1.8 variant, which has distinct DC and AC characteristics-including lower ISB (0.1 µA) and reduced fMAX (100 kHz)-and is not interchangeable without validation.
AT24C32-10PI-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:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C32-10PI-2.5 FAQ
1.How can I place an order for AT24C32-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32-10PI-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 AT24C32-10PI-2.5 reliable?
The price and inventory of AT24C32-10PI-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 AT24C32-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C32-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32-10PI-2.5?
AT24C32-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32-10PI-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 AT24C32-10PI-2.5?
For technical support, including AT24C32-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C32-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C32-10PI-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 AT24C32-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C32-10PI-2.5?
All AT24C32-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32-10PI-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 AT24C32-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C32-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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