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Microchip Technology AT24C32A-10PU-2.7
- Part No.:
- AT24C32A-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C32A-10PU-2.7.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
AT24C32A-10PU-2.7 from Microchip Technology (formerly Atmel) is a 32 Kbit I²C-compatible serial EEPROM with 4096 × 8-bit organization, low-voltage operation (2.7V to 5.5V), hardware write protection via WP pin, and 32-byte page write capability. It delivers 1 million write cycles endurance and 100-year data retention in an 8-lead PDIP package for embedded system configuration storage.
For engineers reviewing the AT24C32A-10PU-2.7 datasheet, AT24C32A-10PU-2.7 pinout, AT24C32A-10PU-2.7 application, or AT24C32A-10PU-2.7 equivalent, this device supports industrial temperature range (–40°C to +85°C), operates at up to 400 kHz I²C clock frequency, and integrates Schmitt-trigger inputs for noise immunity in noisy microcontroller peripheral buses.
Technical Context
The AT24C32A-10PU-2.7 implements a two-wire serial interface compliant with I²C protocol standards, supporting bidirectional data transfer with open-drain SDA and edge-triggered SCL. Its internal address counter enables current-address, random-address, and sequential read modes without external address latching.
Device addressing uses three hardware-configurable pins (A0–A2), allowing up to eight AT24C32A-10PU-2.7 units on a shared bus. The WP pin provides hardware-level memory lock by disabling all writes when pulled high to VCC, while floating or grounded states permit normal operation per internal pull-down biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for firmware parameter tables or calibration data in resource-constrained systems |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| I²C Clock Frequency | Up to 400 kHz - supports fast configuration loading in real-time control loops |
| Write Cycle Time | Max 5 ms - defines minimum interval between successive page writes during firmware updates |
| Endurance | 1 million write cycles - ensures reliable logging over 10+ years in industrial monitoring applications |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration coefficients or security keys |
| Standby Current | 2.0 µA at 2.7V - enables ultra-low-power operation in battery-backed systems |
Pinout & Package
AT24C32A-10PU-2.7 is housed in an 8-lead JEDEC-standard PDIP (8P3) package with 0.300" body width, RoHS-compliant lead finish, and industrial temperature rating (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating inputs that configure one of eight possible I²C slave addresses (0x50–0x57); internally pulled down if left unconnected |
| SDA | Serial Data I/O | Open-drain bidirectional line for I²C data exchange; requires external pull-up resistor to VCC |
| SCL | Serial Clock Input | Positive-edge clock input synchronized to master controller; drives internal timing for read/write operations |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; grounded or floating enables full memory access |
| GND | Ground Reference | Primary return path for supply and signal currents; must be connected to system common ground plane |
| VCC | Power Supply | Single 2.7V–5.5V supply input; powers internal EEPROM array and I²C interface circuitry |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte Page Write Mode | Enables efficient bulk programming of configuration blocks without exceeding internal write cycle limits per page |
| Schmitt Trigger Inputs | Suppresses noise-induced false starts/stops on SDA/SCL lines in electrically noisy industrial environments |
| Hardware Write Protection | Prevents accidental overwrites during power transients or firmware glitches via dedicated WP pin |
| Cascadable Bus Architecture | Supports up to eight devices on one I²C bus using A0–A2 address pins - reduces PCB routing complexity |
| Low-Power Standby Mode | Draws only 2.0 µA at 2.7V - extends battery life in portable diagnostic tools and sensor nodes |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-on initialization via I²C from host MCU. Use Value: Eliminates need for external calibration EEPROMs; retains accuracy across 100-year lifetime without recalibration. | Use Scenario: Holding user-defined therapy parameters and safety thresholds in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for critical treatment settings updated infrequently but requiring guaranteed persistence. Use Value: WP pin prevents runtime corruption during electromagnetic interference events common in hospital environments. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Saving seat/mirror position presets and lighting profiles in vehicle cabin ECUs. IC Role / Device Role / Timing Role: I²C slave storing user preferences with automatic recall after ignition cycle. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability under hood thermal cycling. | Use Scenario: Storing field-upgradable firmware patches for metrology ICs in utility-grade electricity meters. IC Role / Device Role / Timing Role: High-endurance memory for infrequent but mission-critical code updates over 20+ year deployment. Use Value: 1 million write cycles support >500 patch deployments over product lifetime without wear-out risk. |
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 32Kbit capacity and 2.7V–5.5V operation, but in 8-lead SOIC (8S1) package with enhanced ESD protection (4 kV HBM) | Better suited for high-density PCB layouts where PDIP footprint is prohibitive | Select when board space is constrained and SOIC soldering is preferred over through-hole assembly |
| M24C32-WMN6TP | STMicroelectronics 32Kbit I²C EEPROM with identical 2.7V–5.5V range and 400 kHz speed, but rated for extended temperature (–40°C to +105°C) | Required for under-hood automotive modules exceeding +85°C ambient | Choose when operating environment exceeds AT24C32A-10PU-2.7's +85°C upper limit |
Compared with AT24C32A-10PU-2.7, AT24C32D-SSHM-T offers smaller SOIC packaging for compact designs, while M24C32-WMN6TP extends thermal capability for harsher automotive deployments - neither is pin-compatible due to differing package types and thermal specifications.
Availability
AT24C32A-10PU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware patch storage requiring stable component supply across multi-year production cycles.
Supply support for AT24C32A-10PU-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 devices, and nonvolatile memory solutions for embedded systems.
The AT24C32A-10PU-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed for low-power, cost-sensitive applications requiring reliable parameter storage in industrial, medical, and consumer electronics.
FAQ
What is the maximum I²C clock frequency supported by AT24C32A-10PU-2.7?
The AT24C32A-10PU-2.7 supports a maximum I²C clock frequency of 400 kHz across its full 2.7V to 5.5V supply range. This timing is validated per AC Characteristics Table 4 in the datasheet and applies to both read and write operations under industrial temperature conditions (–40°C to +85°C). Exceeding 400 kHz may result in communication failures or data corruption.
Does AT24C32A-10PU-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32A-10PU-2.7 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 1.8 kΩ to 10 kΩ depending on bus capacitance and clock speed; 4.7 kΩ is commonly used for 400 kHz operation with moderate trace lengths. Failure to install pull-ups will prevent proper I²C signaling.
How does the WP pin function on AT24C32A-10PU-2.7?
The WP (Write Protect) pin on AT24C32A-10PU-2.7 disables all write operations-including byte, page, and erase commands-when pulled high to VCC. When grounded or left floating (internally pulled down), full memory access is enabled. This hardware-level protection prevents accidental overwrites during power transitions or software faults, making AT24C32A-10PU-2.7 suitable for safety-critical configuration storage.
What is the endurance rating of AT24C32A-10PU-2.7 and how is it measured?
The AT24C32A-10PU-2.7 is rated for 1 million write cycles per memory location, tested at 5.0V and +25°C using page-write mode. This endurance value reflects guaranteed minimum performance under specified conditions and is not extrapolated. Each write cycle refers to a complete programming operation of one or more bytes within a 32-byte page boundary, with wear leveling managed externally by the host system.
Is AT24C32A-10PU-2.7 compatible with 1.8V I²C systems?
No, AT24C32A-10PU-2.7 is specifically configured for 2.7V to 5.5V operation, as indicated by the "–2.7" suffix. For 1.8V systems, Microchip offers the AT24C32A-10PU-1.8 variant, which guarantees functionality down to 1.8V. Using AT24C32A-10PU-2.7 below 2.7V may result in unreliable reads/writes or communication timeouts due to insufficient input voltage margins.
AT24C32A-10PU-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-10PU-2.7 FAQ
1.How can I place an order for AT24C32A-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32A-10PU-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-10PU-2.7 reliable?
The price and inventory of AT24C32A-10PU-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-10PU-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C32A-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32A-10PU-2.7?
AT24C32A-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32A-10PU-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-10PU-2.7?
For technical support, including AT24C32A-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10PU-2.7 requirements.
6.How does Aetrix verify that AT24C32A-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C32A-10PU-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-10PU-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C32A-10PU-2.7?
All AT24C32A-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10PU-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-10PU-2.7 part is unused and in its original packaging.
Return procedure for AT24C32A-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32A-10PU-2.7 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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