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Microchip Technology AT24C32-10PC-1.8
- Part No.:
- AT24C32-10PC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C32-10PC-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,779
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Product details
Overview
AT24C32-10PC-1.8 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage operation. It supports 1.8V to 5.5V supply range, delivers 100 kHz I²C bus speed at 1.8V, features hardware write protection via WP pin, and provides 32-byte page write capability with 10 ms max write cycle time. It is used in battery-powered IoT sensors for nonvolatile configuration storage.
For engineers reviewing the AT24C32-10PC-1.8 datasheet, AT24C32-10PC-1.8 pinout, AT24C32-10PC-1.8 application, or AT24C32-10PC-1.8 equivalent, key selection considerations include 1.8V minimum operating voltage, industrial-grade standby current (0.1 µA), page-write efficiency, hardware write protection implementation, and JEDEC PDIP-8 package compatibility with legacy through-hole designs.
Technical Context
The AT24C32-10PC-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, enabling reliable communication in electrically noisy environments. Its internal address counter supports current-address, random-address, and sequential read modes, while acknowledge polling allows host firmware to detect write completion without fixed delays.
Memory is organized as 256 pages of 32 bytes each, with automatic address incrementing during page writes and rollover behavior at page boundaries. The WP pin enables hardware-level protection of the upper quadrant (8K bits), and device addressing uses A0–A2 pins to support up to eight devices on a shared bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8 words) - sufficient for storing calibration data, device IDs, or firmware configuration in compact embedded systems. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and battery-powered systems down to single-cell Li-ion or alkaline. |
| I²C Clock Frequency | 100 kHz at 1.8V - ensures timing compliance with low-voltage microcontrollers without requiring level shifters. |
| Write Cycle Time | Max 10 ms - defines minimum inter-write interval; critical for real-time logging where burst writes must be scheduled. |
| Standby Current | 0.1 µA at 1.8V - extends battery life in always-on sensor nodes; measured under VCC = 1.8V, VIN = VCC or VSS. |
| Endurance | 1 million write cycles - supports frequent parameter updates in field-deployed equipment such as smart meters or industrial controllers. |
| Data Retention | 100 years - guarantees long-term integrity of stored settings across product lifecycle without refresh. |
Pinout & Package
AT24C32-10PC-1.8 is supplied in an 8-pin JEDEC PDIP package (0.300" wide), suitable for prototyping, legacy PCBs, and applications requiring manual assembly or socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight unique I²C addresses; internally pulled low if unconnected. |
| SDA | Serial Data I/O | Bidirectional open-drain line; requires external pull-up; supports wire-OR with other I²C devices. |
| SCL | Serial Clock Input | Positive-edge clock-in / negative-edge clock-out; filtered and Schmitt-triggered for noise immunity. |
| WP | Write Protect Control | Active-high signal: tied to VCC to lock upper 8K bits; tied to GND for full write access. |
| GND | Ground Reference | System return path for VCC and I/O signals; must be low-impedance for stable I²C signaling. |
| VCC | Power Supply | Accepts 1.8V–5.5V; decoupling capacitor (0.1 µF) recommended near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Guaranteed functionality and timing compliance down to 1.8V supply, eliminating need for voltage translation in mixed-voltage systems. |
| Hardware Write Protection | WP pin enables selective locking of upper memory quadrant (8K bits), preventing accidental overwrites of critical firmware parameters. |
| 32-Byte Page Write Mode | Allows up to 32 bytes to be written in a single I²C transaction, reducing bus overhead and improving write throughput by ~30× vs. byte writes. |
| Schmitt-Triggered Inputs | SDA and SCL inputs reject fast transients and slow-rising signals, enabling robust operation in automotive or industrial EMI environments. |
| 100-Year Data Retention | Ensures stored calibration coefficients, serial numbers, or security keys remain valid over full product service life without refresh logic. |
Applications
| Smart Energy Meters | Industrial PLC Modules |
|---|---|
Use Scenario: Storing tariff tables, meter calibration constants, and tamper-event logs in utility-grade electricity meters operating on backup coin-cell batteries. IC Role / Device Role / Timing Role: Nonvolatile configuration and event storage EEPROM interfaced directly to a 1.8V-capable MCU via I²C. Use Value: 0.1 µA standby current extends 10-year battery life; 1.8V operation avoids level-shifter components; WP pin prevents unauthorized firmware parameter modification. |
Use Scenario: Holding I/O mapping definitions, module identification data, and fault-history records in modular programmable logic controller backplanes. IC Role / Device Role / Timing Role: Persistent configuration store accessed during cold start and runtime reconfiguration sequences. Use Value: 100 kHz I²C speed at 1.8V ensures compatibility with low-power ARM Cortex-M0+ controllers; 1M endurance supports daily firmware update logging. |
| Medical Wearables | Automotive Body Controllers |
Use Scenario: Saving patient-specific therapy settings, usage counters, and sensor calibration offsets in portable ECG monitors powered by rechargeable Li-Po cells. IC Role / Device Role / Timing Role: Low-voltage EEPROM co-located with analog front-end and BLE SoC on compact flex PCB. Use Value: 1.8V operation aligns with SoC I/O voltage; 32-byte page writes minimize I²C bus occupancy during therapy session save events. |
Use Scenario: Storing seat-position presets, mirror-angle profiles, and lighting configuration in door modules with 12V-to-1.8V PMIC rails. IC Role / Device Role / Timing Role: Configuration memory accessed during vehicle power-up and user preference recall. Use Value: Schmitt-triggered inputs tolerate automotive load-dump transients; 100-year retention ensures settings persist beyond vehicle lifetime. |
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-1.8 | Same electrical specs but rated for -40°C to +85°C industrial temperature range; identical PDIP-8 package. | Required for under-hood or factory-floor deployments where ambient exceeds 70°C. | Select when extended temperature operation is mandatory; otherwise, AT24C32-10PC-1.8 suffices for commercial environments. |
| ON Semiconductor CAT24C32WI-GT3 | 1.7V–5.5V supply range; 100 kHz @ 1.7V; 1 µA ISB at 1.8V; TSSOP-8 only - no PDIP option. | Offers lower minimum voltage and tighter ISB spec, but requires PCB redesign for surface-mount assembly. | Choose for new designs prioritizing lowest possible voltage or space-constrained layouts; not drop-in compatible with AT24C32-10PC-1.8's PDIP footprint. |
Compared with AT24C32-10PI-1.8, the AT24C32-10PC-1.8 trades temperature range for cost and availability in commercial-grade applications; versus CAT24C32WI-GT3, it retains through-hole manufacturability at the expense of slightly higher standby current and 0.1V higher minimum VCC.
Availability
AT24C32-10PC-1.8 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, medical wearables, and industrial control panels requiring stable component supply with guaranteed long-term obsolescence management.
Supply support for AT24C32-10PC-1.8 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 reliability and long-term product support.
The AT24C32-10PC-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-power, low-voltage embedded systems requiring robust, pin-compatible memory expansion with minimal board space and design complexity.
FAQ
What is the minimum operating voltage for the AT24C32-10PC-1.8?
The AT24C32-10PC-1.8 operates down to 1.8V, as confirmed in its ordering code suffix "-1.8" and verified in DC Characteristics tables (VCC1 min = 1.8V). This enables direct connection to 1.8V I/O domains without level shifting, and the device maintains full 100 kHz I²C timing compliance at this voltage.
Does the AT24C32-10PC-1.8 support page writes, and what is the maximum page size?
Yes, the AT24C32-10PC-1.8 supports 32-byte page writes, as documented in the "Features" and "Write Operations" sections. Each page holds exactly 32 bytes, and partial page writes are permitted - allowing efficient storage of variable-length configuration blocks without wasting bus bandwidth on individual byte writes.
How does the Write Protect (WP) pin function on the AT24C32-10PC-1.8?
On the AT24C32-10PC-1.8, the WP pin is active-high: when tied to VCC, it inhibits writes to the upper quadrant (8K bits) of memory; when grounded, full memory access is enabled. If left unconnected, an internal pull-down ensures default write-enable behavior, simplifying designs where protection is not required.
What package type is used for the AT24C32-10PC-1.8?
The AT24C32-10PC-1.8 uses an 8-pin JEDEC PDIP package (0.300" wide, part code 8P3), as specified in the Ordering Information table. This through-hole package supports breadboard prototyping, socket-based field upgrades, and legacy manufacturing processes where surface-mount alternatives are impractical.
Is the AT24C32-10PC-1.8 qualified for automotive applications?
No, the AT24C32-10PC-1.8 is rated for commercial temperature range (0°C to +70°C) only. For automotive use, Microchip offers the AT24C32-10PI-1.8 (industrial: -40°C to +85°C) or automotive-qualified variants like the AT24C32D-SSHM-T, which meet AEC-Q100 requirements - the AT24C32-10PC-1.8 itself is not AEC-Q100 certified.
AT24C32-10PC-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C32-10PC-1.8 FAQ
1.How can I place an order for AT24C32-10PC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32-10PC-1.8 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-1.8 reliable?
The price and inventory of AT24C32-10PC-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32-10PC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32-10PC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32-10PC-1.8?
AT24C32-10PC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32-10PC-1.8 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-1.8?
For technical support, including AT24C32-10PC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32-10PC-1.8 requirements.
6.How does Aetrix verify that AT24C32-10PC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32-10PC-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32-10PC-1.8?
All AT24C32-10PC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32-10PC-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT24C32-10PC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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