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Microchip Technology AT24C32A-10PI-2.7
- Part No.:
- AT24C32A-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C32A-10PI-2.7.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,856
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Product details
Overview
AT24C32A-10PI-2.7 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) two-wire serial EEPROM with I²C-compatible interface, operating from 2.7V to 5.5V, featuring 32-byte page write capability, 1 million write cycles endurance, and 100-year data retention. It is used for nonvolatile parameter storage in industrial controllers, power supply monitors, and sensor calibration modules.
For engineers reviewing the AT24C32A-10PI-2.7 datasheet, AT24C32A-10PI-2.7 pinout, AT24C32A-10PI-2.7 application, or AT24C32A-10PI-2.7 equivalent, key selection considerations include VCC range compatibility (2.7–5.5V), WP pin hardware write protection, 400 kHz max clock rate at ≥2.5V, and JEDEC PDIP-8 package footprint for through-hole prototyping and legacy board replacement.
Technical Context
The AT24C32A-10PI-2.7 implements a standard I²C bus protocol with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and addressable cascading up to eight devices via A0–A2 pins. It supports byte and page write modes with self-timed internal write cycles.
Its memory is organized as 128 pages of 32 bytes each, requiring a 12-bit word address. The WP pin enables hardware-level write inhibition when pulled high, while standby current is 2.0 µA at 2.7V - critical for battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing firmware configuration, calibration coefficients, or device identity data |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Interface | Two-wire I²C-compatible serial bus - minimal pin count, shared with other I²C peripherals |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V - enables fast parameter updates without CPU overhead |
| Write Endurance | 1 million write cycles - supports frequent recalibration or logging in industrial edge nodes |
| Data Retention | 100 years at +25°C - ensures long-term reliability in unattended equipment |
| Standby Current | 2.0 µA at 2.7V - extends battery life in always-on monitoring applications |
Pinout & Package
AT24C32A-10PI-2.7 is supplied in an 8-lead JEDEC PDIP (Plastic Dual Inline Package), 0.300" wide body, suitable for through-hole mounting and manual rework.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating (internally pulled down); enable up to eight devices on one I²C bus |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up; supports wire-OR with other I²C devices |
| SCL | Serial Clock Input | Positive-edge clock-in, negative-edge clock-out - synchronizes all I²C transfers |
| WP | Write Protect | Hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access |
| VCC | Power Supply | 2.7V–5.5V operation - eliminates need for separate voltage regulators in mixed-supply systems |
| GND | Ground Reference | Common return path for logic and power - must be low-impedance for noise-free I²C signaling |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Reduces I²C transaction overhead by up to 32× vs. byte writes - accelerates bulk parameter updates |
| Schmitt-trigger, filtered inputs | Rejects >100 ns noise spikes on SDA/SCL - improves robustness in electrically noisy industrial environments |
| Hardware write protection (WP pin) | Prevents accidental overwrites during power-up/down or firmware glitches - no software dependency |
| Self-timed 5 ms max write cycle | Eliminates need for external timing control - simplifies host MCU firmware design |
| Extended temperature range | -40°C to +85°C operation - qualified for industrial automation, power converters, and outdoor metering |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable settings without firmware reflashing; retains values across power loss. |
Use Scenario: Holding factory-calibrated offset/gain coefficients and temperature compensation tables in MEMS pressure sensors. IC Role / Device Role / Timing Role: Persistent memory mapped to sensor microcontroller's I²C peripheral for post-power-up coefficient loading. Use Value: Ensures measurement accuracy over lifetime without requiring recalibration in end-user devices. |
| AC/DC Power Supply Monitoring | Medical Device Usage Logs |
Use Scenario: Recording fault history, thermal events, and operational hours in isolated AC/DC power modules. IC Role / Device Role / Timing Role: Fault-event logger interfaced to power controller's I²C bus for periodic timestamped writes. Use Value: Provides traceability for maintenance and compliance reporting; withstands 1M write cycles over 10+ years. |
Use Scenario: Storing usage counters, sterilization cycles, and operator audit trails in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant log storage with WP pin enabled during normal operation. Use Value: Meets IEC 62304 data integrity requirements; 100-year retention supports multi-decade device service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | Same 32K-bit capacity, 1.7–5.5V VCC range, TSSOP-8 package, higher 1 MHz I²C speed at 5V | Requires PCB redesign for surface-mount layout; better suited for space-constrained new designs | Select if migrating to SMT and needing faster I²C throughput; not drop-in for PDIP footprints |
| 24LC32A-I/P | Microchip-branded 32K EEPROM, PDIP-8, 2.5–5.5V VCC, identical pinout and timing but 100 kHz/400 kHz dual-speed support | Direct physical and functional replacement; same JEDEC PDIP-8 footprint and A0–A2 addressing | Preferred for second-source procurement where AT24C32A-10PI-2.7 is unavailable; no layout or firmware changes needed |
Compared with AT24C32A-10PI-2.7, AT24C32D-SSHM-T offers higher speed and smaller footprint but demands PCB revision, while 24LC32A-I/P provides identical mechanical and electrical compatibility - making it the only true plug-and-play alternative for legacy through-hole designs.
Availability
AT24C32A-10PI-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, smart sensor modules, AC/DC power supplies, and medical diagnostics equipment requiring stable component supply across extended product lifecycles.
Supply support for AT24C32A-10PI-2.7 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 is a global semiconductor company specializing in microcontrollers, analog, and memory solutions, with broad industrial and automotive qualification capabilities.
The AT24C32A-10PI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, nonvolatile data storage in cost-sensitive industrial and commercial systems.
FAQ
What is the maximum I²C clock frequency supported by AT24C32A-10PI-2.7?
The AT24C32A-10PI-2.7 supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. At 2.7V operation, the maximum rated clock rate remains 400 kHz per the AC Characteristics table. This allows efficient parameter updates without excessive MCU resource usage in real-time control systems.
Does AT24C32A-10PI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32A-10PI-2.7 requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time - essential for compliant I²C signaling and noise margin.
Can AT24C32A-10PI-2.7 be used in automotive applications?
No, AT24C32A-10PI-2.7 is specified for industrial temperature range (-40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, Microchip offers automotive-grade variants such as AT24C32AN-10SE-2.7 (extended -40°C to +125°C) with appropriate qualification documentation.
How does the Write Protect (WP) pin function on AT24C32A-10PI-2.7?
When WP is tied to VCC, all write operations to AT24C32A-10PI-2.7 are inhibited - protecting stored data from corruption during power transitions or firmware errors. When WP is grounded, full read/write access is enabled. Floating WP is internally pulled down, but Microchip recommends hardwiring for deterministic behavior.
What is the memory organization of AT24C32A-10PI-2.7?
AT24C32A-10PI-2.7 organizes its 32,768 bits as 4096 words of 8 bits each, grouped into 128 pages of 32 bytes. This structure enables efficient 32-byte page writes and supports random access using a 12-bit word address - ideal for modular configuration storage.
AT24C32A-10PI-2.7 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:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C32A-10PI-2.7 FAQ
1.How can I place an order for AT24C32A-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32A-10PI-2.7 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 AT24C32A-10PI-2.7 reliable?
The price and inventory of AT24C32A-10PI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32A-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C32A-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32A-10PI-2.7?
AT24C32A-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32A-10PI-2.7 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 AT24C32A-10PI-2.7?
For technical support, including AT24C32A-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10PI-2.7 requirements.
6.How does Aetrix verify that AT24C32A-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C32A-10PI-2.7 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 AT24C32A-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C32A-10PI-2.7?
All AT24C32A-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10PI-2.7, 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 AT24C32A-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT24C32A-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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