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Microchip Technology AT24C32-10PC
- Part No.:
- AT24C32-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C32-10PC.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,514
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Product details
Overview
AT24C32-10PC from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM with 2.7V to 5.5V operation, 10 ms max write cycle time, hardware write protection via WP pin, and 1 million write endurance. It serves as nonvolatile configuration storage in embedded microcontroller systems requiring low-voltage compatibility and industrial-grade reliability.
For engineers reviewing the AT24C32-10PC datasheet, AT24C32-10PC pinout, AT24C32-10PC application, or AT24C32-10PC equivalent, key selection criteria include its 2.7V–5.5V supply range, 100 kHz I²C speed at 2.7V, 8-pin PDIP package, page-write capability, and hardware write-protect functionality for memory quadrant protection.
Technical Context
The AT24C32-10PC implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses three hardware address pins (A0–A2) to support up to eight devices on a shared bus and features an internal address counter for sequential reads.
Write operations are internally timed (max 10 ms), with byte and 32-byte page modes supported. The WP pin enables hardware-level protection of the upper 8K bits (2048 words), while standby current is specified at 0.5 µA at 2.7V - critical for battery-powered applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8) - sufficient for firmware calibration tables, device ID storage, or configuration registers in resource-constrained systems |
| Supply Voltage Range | 2.7V to 5.5V - supports mixed-voltage designs and direct interfacing with 3.3V or 5V microcontrollers without level shifting |
| I²C Clock Frequency | 100 kHz @ 2.7V - ensures reliable communication in noisy industrial environments where higher speeds may induce timing violations |
| Write Cycle Time | Max 10 ms - defines minimum interval between successive writes; impacts real-time logging latency and firmware update sequencing |
| Endurance | 1 million write cycles - enables long-term field deployment in data-logging or parameter-tuning applications without premature wear-out |
| Data Retention | 100 years - guarantees persistent storage integrity across product lifecycle, including shelf life and extended operational periods |
| Standby Current | 0.5 µA @ 2.7V - minimizes quiescent power draw in always-on or battery-backed systems such as smart meters or IoT edge nodes |
Pinout & Package
AT24C32-10PC is packaged in an 8-pin JEDEC PDIP (package code 8P3), 0.300" wide, with through-hole mounting and industry-standard footprint.
| 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 expansion |
| SDA | Serial Data I/O | Open-drain bidirectional line for I²C data transfer; requires external pull-up resistor and supports wire-OR bus topology |
| SCL | Serial Clock Input | Input-only clock line with Schmitt trigger; synchronizes all read/write transfers and determines maximum bus speed |
| WP | Write Protect Control | Active-high pin that locks upper 8K bits when tied to VCC; provides hardware-level security against accidental overwrites |
| GND | Ground Reference | Primary return path for all internal circuitry and I²C signaling; must be low-impedance for noise immunity |
| VCC | Power Supply | Single-supply input supporting 2.7V–5.5V operation; powers EEPROM core and I/O buffers without external regulators |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables efficient bulk writes within a single page boundary, reducing I²C transaction overhead versus byte-by-byte programming |
| Schmitt-triggered SCL/SDA inputs | Suppresses high-frequency noise on I²C lines, improving robustness in electrically harsh environments like motor control or power supplies |
| Hardware write protection (WP) | Prevents unintended modification of critical configuration data without software intervention or system reset |
| 100-year data retention | Eliminates need for periodic refresh or backup mechanisms in long-lifecycle products such as industrial controllers or medical devices |
| Cascadable 2-wire interface | Allows up to eight AT24C32-10PC devices on one I²C bus, simplifying memory expansion without additional address decoding logic |
Applications
| Industrial Sensor Calibration | Consumer Appliance Settings |
|---|---|
Use Scenario: Storing temperature compensation coefficients and sensor offset values during factory calibration of pressure transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding trim parameters accessed at power-up by host MCU before sensor initialization. Use Value: Enables field-deployable sensors to retain calibrated accuracy across power cycles and thermal drift without external battery backup. |
Use Scenario: Saving user-selected cooking modes, timer presets, and display brightness levels in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Persistent settings storage updated only on user interaction, with WP pin preventing corruption during brown-out events. Use Value: Delivers consistent user experience across generations and eliminates "reset-to-default" behavior after unplugging or power loss. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Recording device-specific serial numbers, calibration timestamps, and usage counters in portable ECG monitors. IC Role / Device Role / Timing Role: Secure identity and audit log storage with write-protection applied to immutable fields post-manufacturing. Use Value: Supports regulatory traceability requirements (e.g., FDA UDI) and enables tamper-evident firmware version tracking. |
Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Low-power configuration memory accessed infrequently but requiring guaranteed retention over 15+ year vehicle lifetimes. Use Value: Meets AEC-Q100 stress test requirements for data integrity under thermal cycling and vibration, with <0.5 µA standby draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C32-10PI | Same electrical specs but rated for -40°C to +85°C industrial temperature range; identical pinout and package (8P3) | Required for under-hood automotive or outdoor industrial deployments where ambient exceeds 70°C | Select AT24C32-10PI when operating temperature extends beyond commercial grade limits; no PCB changes needed. |
| ON Semiconductor CAT24C32WI-GT3 | Pin-compatible 32K I²C EEPROM with 1.7V–5.5V supply, 100 kHz @ 1.7V, and 1M endurance; TSSOP-8 package (8T) | Offers smaller footprint and lower profile than PDIP; suitable for space-constrained consumer PCBs | Choose CAT24C32WI-GT3 for surface-mount designs prioritizing board area reduction; verify WP pin behavior matches legacy layout. |
Compared with AT24C32-10PC, AT24C32-10PI extends thermal reliability for harsh environments, while CAT24C32WI-GT3 trades through-hole convenience for compactness - both preserve functional equivalence but differ in environmental rating and mechanical integration.
Availability
AT24C32-10PC is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance settings, medical device configuration, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for AT24C32-10PC 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 AT24C32-10PC belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems needing reliable, byte-addressable nonvolatile storage with minimal external components.
FAQ
What voltage range does the AT24C32-10PC support?
The AT24C32-10PC operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This dual-voltage capability eliminates the need for level shifters in mixed-signal designs and ensures interoperability with common microcontrollers such as PIC, AVR, and ARM Cortex-M series. The "-2.7" suffix in AT24C32-10PC-2.7 explicitly denotes this low-voltage variant.
How many devices can share the same I²C bus with AT24C32-10PC?
Up to eight AT24C32-10PC devices can operate on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit device addresses (0x50–0x57). Each pin can be tied high, low, or left floating (internally pulled down), enabling flexible bus topology without external address decoders - a key advantage in modular sensor or peripheral systems.
What is the function of the WP pin on AT24C32-10PC?
The WP (Write Protect) pin on AT24C32-10PC provides hardware-level protection for the upper 8K bits (2048 words) of memory. When WP is tied to VCC, writes to that quadrant are inhibited; when grounded or floating, full memory access is enabled. This feature prevents accidental corruption of critical calibration or security data during firmware updates or power faults.
Does AT24C32-10PC support page writes, and what is the page size?
Yes, AT24C32-10PC supports 32-byte page writes, allowing up to 32 bytes to be written in a single I²C transaction. This reduces bus overhead compared to byte-wise writes and improves efficiency when storing contiguous data such as configuration blocks or firmware metadata. Page boundaries align to 32-byte offsets, and rollover occurs within the same page if more than 32 bytes are sent.
What is the maximum write cycle time for AT24C32-10PC?
The maximum write cycle time for AT24C32-10PC is 10 ms, as indicated by the "-10" in its part number. This self-timed internal operation begins after a valid STOP condition and completes before the device responds to subsequent I²C commands. During this period, the device does not acknowledge addresses - a behavior leveraged in acknowledge polling to detect write completion.
AT24C32-10PC 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C32-10PC FAQ
1.How can I place an order for AT24C32-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32-10PC 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 reliable?
The price and inventory of AT24C32-10PC 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 is usually 5 days.
3.What payment methods are accepted for AT24C32-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32-10PC?
AT24C32-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32-10PC 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?
For technical support, including AT24C32-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32-10PC requirements.
6.How does Aetrix verify that AT24C32-10PC is sourced from the original manufacturer or authorized distributors?
All AT24C32-10PC 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 meets industry standards.
7.What is the process for return or replacement of AT24C32-10PC?
All AT24C32-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32-10PC, 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 part is unused and in its original packaging.
Return procedure for AT24C32-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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