24AA32AT-I/MC Microchip Integrated Circuit (Small Outline No-lead) In Stock
The Microchip 24AA32AT-I/MC is a 32 Kbit serial EEPROM with I2C 2-wire interface operating from 1.7V to 5.5V, rated for 1,000,000 write cycles and over 200 years data retention. Packaged in an 8-pin DFN for compact designs, in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24AA32AT-I/MC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4636(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 32 Kbit (4 KB) non-volatile storage with 1,000,000 guaranteed erase/write cycles ensures long service life in data-logging and configuration-storage applications
- Wide 1.7V to 5.5V supply voltage range enables direct integration with 1.8V, 3.3V, and 5V microcontrollers without level shifters
- 2-wire I2C serial interface at up to 100 kHz simplifies firmware integration using standard Wire or HAL_I2C library calls
- Data retention exceeding 200 years at room temperature ensures configuration data survives the full product lifetime
- Compact 8-pin DFN (3mm × 2mm) package minimizes PCB footprint in space-constrained IoT nodes and wearable devices
Applications
The 24AA32AT-I/MC is ideal for storing non-volatile configuration data, calibration coefficients, and user settings in IoT sensors, wearables, and embedded systems that need reliable retention through power cycles. Its 1.7V minimum supply suits single-cell lithium-ion and coin-cell battery-powered applications such as smart meters, medical monitoring patches, and environmental data loggers. The I2C interface and DFN-8 package allow it to be daisy-chained with other I2C peripherals on a shared 2-wire bus in compact mixed-signal PCB designs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | DFN-8 |
| Factory Lead Time | 24Weeks |
| YTEOL | 9 |
| Additional Feature | 2-WIRE SERIAL INTERFACE; DATA RETENTION > 200 YEARS; 1000000 ERASE/WRITE CYCLES GUARANTEED |
| Clock Frequency-Max (fCLK) | 0.1MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010DDDR |
| JESD-30 Code | R-PDSO-N8 |
| JESD-609 Code | e3 |
| Memory Density | 32768bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Words | 4096words |
| Number of Words Code | 4000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 4KX8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.11,20 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.000001A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.7V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24AA32AT-I/MC:
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Frequently Asked Questions
How many write cycles can the 24AA32AT-I/MC endure before data retention may degrade?
Microchip guarantees the 24AA32AT-I/MC for 1,000,000 erase/write cycles per byte location; once this endurance limit is reached, individual cells may fail to retain data reliably, so designs with high write frequency such as event counters or wear-leveled logs should distribute writes across the 4 KB address space to stay within the per-location 1,000,000-cycle budget over the product lifetime.
Can the 24AA32AT-I/MC operate directly from a 1.8V LDO rail on an ultra-low-power microcontroller without level translation?
Yes. The 24AA32AT-I/MC is specified from 1.7V to 5.5V supply voltage, so a 1.8V rail provides 100mV of margin above the 1.7V minimum; this eliminates the need for external I2C level-shift ICs when interfacing to 1.8V microcontrollers such as the Nordic nRF52840 or STM32L4 running at 1.8V core voltage, saving BOM cost and board space.
How does the I2C address of the 24AA32AT-I/MC get configured and how many devices can share one bus?
The 24AA32AT-I/MC uses the I2C control byte 1010DDDx, where the 3 DD bits (A2, A1, A0 pins) select one of 8 unique addresses; this allows up to 8 individual 24AA32AT-I/MC devices on a single 2-wire I2C bus, giving 8 × 4 KB = 32 KB of total addressable EEPROM from a single I2C bus without address collision.
What is the maximum clock frequency for the 24AA32AT-I/MC I2C interface and which speed mode does this correspond to?
The 24AA32AT-I/MC supports a maximum clock frequency of 100 kHz (fCLK-Max = 0.1 MHz), corresponding to the standard-mode I2C specification; it does not support fast-mode (400 kHz) or fast-mode-plus (1 MHz), so firmware must configure the I2C peripheral to 100 kHz or slower to avoid read/write errors or data corruption during burst page-write operations.
How compact is the 24AA32AT-I/MC DFN-8 package for placement alongside an MCU in a wearable sensor design?
The DFN-8 package measures 3mm × 2mm with 0.5mm lead pitch, occupying less than 6mm² of PCB area; its exposed pad-free bottom eliminates thermal-pad voiding concerns, and the no-lead outline allows placement within 0.4mm of adjacent 0402 passives, enabling a complete 4 KB EEPROM solution in under 10mm² total board area including bypass capacitors for wearable and implantable sensor designs.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.5800 | $0.58 |
| 74+ | $0.4935 | $36.52 |
| 1000+ | $0.4900 | $490.00 |
| 5000+ | $0.4700 | $2350.00 |
| 13200+ | $0.4673 | $6169.02 |
| 26400+ | $0.4636 | $12238.51 |
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