24C32ASN Microchip Integrated Circuit (Small Outline Packages) In Stock
The 24C32ASN is a 32 Kbit (4 KB) I2C serial EEPROM from Microchip operating at 5.0 V with a 400 kHz fast-mode I2C interface and 32-byte page write buffer. It supports up to 1,000,000 write cycles per byte and 200-year data retention in an 8-pin SOIC package. Ideal for configuration storage, calibration data, and event logging in consumer, industrial, and automotive electronics.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24C32ASN Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 32 Kbit (4 KB) I2C EEPROM with 400 kHz fast-mode bus support
- 32-byte page write buffer for efficient sequential data writes
- Up to 1,000,000 erase/write cycles per byte ensuring long service life
- Hardware write-protect pin for data security in critical storage applications
- 8-pin SOIC package with 3 address pins supporting up to 8 devices on one I2C bus
Applications
The 24C32ASN is commonly used to store firmware configuration, sensor calibration constants, and system parameters in embedded products such as smart meters, industrial sensors, and consumer appliances. Its 400 kHz I2C interface and 32-byte page write capability allow quick bulk writes from a microcontroller during factory programming or field updates. The device also serves as a small event log or hour-meter storage in HVAC controllers and motor drives where non-volatile retention over 200 years ensures data integrity across the product lifetime.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many bytes of data can be written in a single page write operation to the 24C32ASN?
The 24C32ASN supports a 32-byte page write buffer, meaning a host MCU can send up to 32 bytes of data in a single I2C write transaction. This reduces bus overhead compared to byte-at-a-time writes and allows a 4 KB configuration block to be stored in 128 page-write operations over the 400 kHz fast-mode I2C bus, completing the full write in well under 1 second.
How many 24C32ASN devices can be connected to a single I2C bus, and how are they addressed?
Up to 8 individual 24C32ASN devices can share a single I2C bus simultaneously, because each chip exposes 3 hardware address pins (A0, A1, A2) that set the lower 3 bits of the 7-bit I2C device address. Tying each device's address pins to different VCC/GND combinations gives unique addresses ranging from 0x50 to 0x57, effectively providing up to 32 KB × 8 = 256 KB of total I2C EEPROM on one bus.
In a smart meter design, what endurance and retention guarantees does the 24C32ASN offer for accumulated energy logs?
The 24C32ASN is rated for up to 1,000,000 erase/write cycles per byte and a data retention period exceeding 200 years at 25°C. For a smart meter that writes one daily log entry to the same byte addresses, 1,000,000 cycles translates to over 2,700 years of daily writes, far exceeding the meter's service life and ensuring that accumulated energy readings and tamper events are preserved reliably throughout the product's deployment.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”