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Microchip Technology AT24C32AN-10SI-2.7
- Part No.:
- AT24C32AN-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C32AN-10SI-2.7.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,815
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Product details
Overview
AT24C32AN-10SI-2.7 from Microchip Technology (formerly Atmel) is a 32-kbit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, featuring 32-byte page write capability, 1 million write cycles endurance, and 100-year data retention. It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-voltage, space-constrained, and industrial-grade memory.
For engineers reviewing the AT24C32AN-10SI-2.7 datasheet, AT24C32AN-10SI-2.7 pinout, AT24C32AN-10SI-2.7 application, or AT24C32AN-10SI-2.7 equivalent, this device delivers verified I²C timing compliance (400 kHz at 2.5–5.0 V), hardware write protection via WP pin, Schmitt-trigger noise-immune inputs, and JEDEC SOIC-8 packaging for standard PCB integration.
Technical Context
The AT24C32AN-10SI-2.7 implements a two-wire bidirectional I²C interface with open-drain SDA and edge-triggered SCL, supporting up to eight devices on one bus via A0–A2 address pins. Its internal architecture includes a 12-bit word address counter, page-aligned 32-byte write buffer, and automatic address roll-over during sequential reads.
It uses proprietary internal pull-down biasing on floating A0–A2 and WP pins, supports acknowledge polling during write cycles, and enforces strict tWR ≤ 5 ms (max) self-timed writes. Noise suppression is achieved through integrated Schmitt triggers and 100 ns input filtering on SDA/SCL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of firmware parameters, calibration data, or device IDs in compact embedded nodes. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level-shifting. |
| I²C Clock Rate | Up to 400 kHz at VCC ≥ 2.5V - supports high-speed configuration updates in real-time systems. |
| Write Endurance | 1,000,000 cycles - suitable for logging or dynamic parameter storage with frequent updates. |
| Data Retention | 100 years at +25°C - ensures long-term reliability in unattended or maintenance-free deployments. |
| Standby Current | 2.0 µA at VCC = 2.7V - minimizes quiescent power in battery-backed or energy-harvesting applications. |
| Operating Temperature | −40°C to +85°C - certified for industrial control, automotive body electronics, and outdoor sensor nodes. |
Pinout & Package
AT24C32AN-10SI-2.7 is housed in an 8-lead JEDEC SOIC package (8S1), 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. This surface-mount package enables automated assembly and fits legacy footprint designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware Device Address Inputs | Enable up to eight AT24C32AN-10SI-2.7 devices on a single I²C bus; internally pulled down if left floating (no external resistors required). |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C devices; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SCL | Serial Clock Input | Master-generated clock signal; rising edge samples data, falling edge drives data - defines I²C timing compliance window. |
| WP | Hardware Write Protect | Logic-high disables all writes (including page and byte); enables fail-safe configuration lock without software intervention. |
| VCC | Power Supply | Accepts 2.7–5.5V; powers internal logic and EEPROM array - no separate VPP required for programming. |
| GND | Ground Reference | Common return path for supply and I/O; must be low-impedance to maintain noise immunity on SDA/SCL. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte Page Write Mode | Reduces write transaction overhead by up to 32× vs. byte-write; enables efficient bulk parameter updates in one I²C sequence. |
| Schmitt Trigger Inputs | Eliminates false triggering from slow-rising or noisy I²C signals - critical for long traces or electrically harsh environments. |
| Self-Timed Write Cycle | Automatically manages internal charge-pump programming; host only waits ≤5 ms before polling - simplifies firmware timing logic. |
| Write Protect Pin (WP) | Provides hardware-level memory lockdown independent of firmware state - prevents accidental or malicious corruption during field operation. |
| Cascadable I²C Addressing | Three address pins (A0–A2) allow up to eight identical AT24C32AN-10SI-2.7 units on one bus - ideal for modular system expansion. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
|
Use Scenario: Storing temperature/pressure offset coefficients and linearization tables in factory-calibrated sensors deployed in HVAC or process control. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at boot and updated during recalibration; operates on 3.3V I²C bus with <400 kHz timing. Use Value: Enables field recalibration without firmware reflash; 1M endurance supports >10 years of annual recalibration cycles. |
Use Scenario: Holding tariff schedules, meter ID, pulse constants, and tamper logs in utility smart meters with 10+ year service life. IC Role / Device Role / Timing Role: Secure configuration store with WP pin hardwired to VCC during normal operation to prevent unauthorized writes. Use Value: Guarantees regulatory-compliant data integrity; 100-year retention meets ANSI C12.22 and IEC 62056 requirements. |
| POS Terminal Firmware Settings | Automotive Body Control Module (BCM) |
|
Use Scenario: Saving receipt format templates, tax rates, language preferences, and peripheral mappings in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to ARM Cortex-M0+ MCU via 100 kHz I²C during standby mode. Use Value: 2.0 µA standby current extends battery backup runtime; SOIC-8 footprint matches legacy design revisions. |
Use Scenario: Storing seat position memory, mirror presets, door lock configurations, and fault history in automotive BCMs. IC Role / Device Role / Timing Role: Industrial-grade EEPROM operating across −40°C to +85°C; accessed during ignition-on initialization. Use Value: Qualified for automotive extended temperature range; WP pin tied to MCU GPIO for dynamic protection during CAN firmware updates. |
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, 1.7–5.5V supply, 400 kHz max, SOIC-8, but rated only to +85°C (not extended temp). | Lacks −40°C to +125°C option; no WP pin - relies on software write disable. | Select when cost sensitivity outweighs extended temperature need and hardware write protection is not mandatory. |
| BR24G32FJ-3GE2 | Rohm 32K I²C EEPROM, 1.6–5.5V, 400 kHz, TSSOP-8, with built-in WP and 1M endurance, but only rated to +85°C. | Same pinout as SOIC-8 but different package (TSSOP); slightly lower standby current (0.5 µA @ 1.8V). | Choose for ultra-low-power battery applications where TSSOP-8 layout compatibility exists and extended temperature is unnecessary. |
Compared with M24C32-WMN6TP and BR24G32FJ-3GE2, the AT24C32AN-10SI-2.7 uniquely combines industrial temperature range (−40°C to +85°C), hardware WP, JEDEC SOIC-8 footprint, and full 400 kHz timing compliance at 2.7V–5.5V - making it optimal for drop-in replacement in legacy industrial designs.
Availability
AT24C32AN-10SI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, POS terminal firmware settings, and automotive body control module applications requiring stable component supply across multi-year production cycles.
Supply support for AT24C32AN-10SI-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 acquired Atmel in 2016 and maintains full product continuity, quality assurance, and technical documentation for the AT24Cxx EEPROM family.
The AT24C32AN-10SI-2.7 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile data storage in industrial, automotive, and consumer embedded systems.
FAQ
What is the maximum I²C clock frequency supported by AT24C32AN-10SI-2.7?
The AT24C32AN-10SI-2.7 supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. At 2.7V operation, it meets the 400 kHz AC timing specifications per the official datasheet (3054N–SEEPR–2/04), including tLOW ≤ 1.3 µs and tHIGH ≤ 0.6 µs. This allows high-speed parameter loading without protocol bottlenecks in modern microcontroller systems.
Does AT24C32AN-10SI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32AN-10SI-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 speed; 4.7 kΩ is commonly used for 400 kHz operation with ≤400 pF total bus capacitance. The AT24C32AN-10SI-2.7 itself does not integrate pull-ups.
Can AT24C32AN-10SI-2.7 be used in automotive applications requiring extended temperature range?
The AT24C32AN-10SI-2.7 is rated for −40°C to +85°C (industrial grade), not the extended −40°C to +125°C range. For true automotive under-hood use, Microchip offers the AT24C32AN-10SE-2.7 variant (same SOIC-8 package, extended temp). Using AT24C32AN-10SI-2.7 in cabin or body-control modules within its specified range remains valid and widely deployed.
How does the Write Protect (WP) pin function on AT24C32AN-10SI-2.7?
When WP is tied to VCC, all write operations (byte and page) to the AT24C32AN-10SI-2.7 memory array are inhibited - reads remain fully functional. If WP is grounded or left floating (with <3 pF board coupling), writes are enabled. This hardware lock provides deterministic, firmware-independent protection against unintended memory corruption.
What is the typical write cycle time for AT24C32AN-10SI-2.7?
The AT24C32AN-10SI-2.7 has a maximum write cycle time of 5 ms for all byte and page writes, as confirmed in the datasheet's AC Characteristics table (tWR = 5 ms max). This self-timed duration covers internal charge-pump programming and verification; hosts must wait this period or use acknowledge polling to confirm completion before initiating subsequent I²C transactions.
AT24C32AN-10SI-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32AN-10SI-2.7 FAQ
1.How can I place an order for AT24C32AN-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32AN-10SI-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 AT24C32AN-10SI-2.7 reliable?
The price and inventory of AT24C32AN-10SI-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 AT24C32AN-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C32AN-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32AN-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32AN-10SI-2.7?
AT24C32AN-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32AN-10SI-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 AT24C32AN-10SI-2.7?
For technical support, including AT24C32AN-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32AN-10SI-2.7 requirements.
6.How does Aetrix verify that AT24C32AN-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C32AN-10SI-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 AT24C32AN-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C32AN-10SI-2.7?
All AT24C32AN-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32AN-10SI-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 AT24C32AN-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT24C32AN-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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