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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology AT24C32A-10PI-1.8

Name: AT24C32A-10PI-1.8
Brand: Microchip Technology
SKU: AT24C32A-10PI-1.8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C32A-10PI-1.8

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: AT24C32A-10PI-1.8.pdf

Description:: IC EEPROM 32KBIT I2C 400KHZ 8DIP

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Product details

Overview

AT24C32A-10PI-1.8 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage operation, supporting V_CC = 1.8V to 5.5V, 100 kHz clock rate at 1.8V, and 32-byte page write mode. It features hardware write protection via the WP pin and is housed in an 8-lead PDIP package for industrial temperature range (–40°C to +85°C). This device serves as nonvolatile configuration storage in battery-powered IoT sensors and embedded microcontroller systems.

For engineers reviewing the AT24C32A-10PI-1.8 datasheet, AT24C32A-10PI-1.8 pinout, AT24C32A-10PI-1.8 application, or AT24C32A-10PI-1.8 equivalent, key selection considerations include its 1.8V minimum supply, 100 kHz I²C timing at low voltage, 6 µA standby current, hardware write protect functionality, and compatibility with cascaded multi-device I²C buses up to eight units.

Technical Context

The AT24C32A-10PI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, enabling robust communication in electrically noisy environments. Its internal address counter supports current-address, random-address, and sequential read modes, while the 32-byte page architecture allows partial writes without erasing full pages.

Device addressing uses three hardwired A0–A2 pins to support up to eight devices on a shared bus, and the WP pin provides hardware-level memory lock by tying to V_CC. The EEPROM enters low-power standby mode after STOP condition receipt and supports acknowledge polling to monitor write completion.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	32,768 bits (4096 × 8), sufficient for firmware calibration tables or device identity storage
V_CC Range	1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems without level shifters
I²C Clock Rate	100 kHz at 1.8V - ensures reliable timing margin under low-voltage conditions
Standby Current	1.0 µA at 1.8V - extends battery life in always-on sensor nodes
Write Cycle Time	5 ms max - defines minimum interval between successive write commands
Endurance	1 million write cycles - supports frequent field-updatable parameter logging
Data Retention	100 years - guarantees long-term integrity of stored configuration data

Pinout & Package

AT24C32A-10PI-1.8 is packaged in an 8-lead JEDEC PDIP (package code 8P3), 0.300" wide, through-hole mountable format suitable for prototyping and industrial control boards.

Pin/Terminal	Circuit Role	Design Meaning
A0–A2	Device Address Inputs	Hardwired to set unique I²C slave address; enables up to eight devices on one bus
SDA	Serial Data I/O	Bidirectional open-drain line requiring external pull-up; shares bus with other I²C peripherals
SCL	Serial Clock Input	Master-generated clock synchronizing all data transfers; filtered for noise immunity
WP	Write Protect Control	Active-high hardware lock: tied to V_CC disables all writes, preventing accidental overwrites
GND	Ground Reference	Signal and power return path; must be low-impedance for stable I²C signaling
V_CC	Supply Voltage	Accepts 1.8V–5.5V; powers internal logic and memory array; no separate V_PP required

Key Features

Feature	Design Value
1.8V Operation Support	Enables direct integration with 1.8V microcontrollers and battery-supplied systems without voltage translation
32-Byte Page Write	Reduces write overhead versus byte-by-byte programming; allows efficient storage of compact configuration blocks
Schmitt Trigger Inputs	Improves noise immunity on SDA/SCL lines in industrial environments with EMI or long traces
Hardware Write Protection	Prevents corruption during power brownouts or firmware glitches by disabling writes when WP = V_CC
Cascadable I²C Architecture	Supports up to eight AT24C32A-10PI-1.8 devices on one bus using A0–A2 address bits

Applications

Smart Metering Module	Industrial PLC I/O Expansion
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in utility meters operating on coin-cell batteries. IC Role / Device Role / Timing Role: Nonvolatile configuration and event log storage with guaranteed 100-year data retention and 1M endurance. Use Value: Eliminates need for external backup capacitors or supercapacitors due to ultra-low 1.0 µA standby current at 1.8V.	Use Scenario: Holding module identification, channel scaling factors, and fault history in modular I/O racks exposed to factory floor EMI. IC Role / Device Role / Timing Role: Robust I²C EEPROM with Schmitt-triggered inputs and hardware write protection for field-deployed firmware updates. Use Value: Prevents memory corruption during voltage transients via WP pin lock and noise-filtered bus interface.
Wearable Health Sensor	Automotive Body Control Unit
Use Scenario: Saving user-specific biometric thresholds and sensor calibration offsets in Bluetooth-enabled fitness trackers. IC Role / Device Role / Timing Role: Low-voltage serial EEPROM interfacing directly with 1.8V ARM Cortex-M0+ MCU via I²C. Use Value: Enables single-supply 1.8V system design without level-shifting circuitry, reducing BOM count and PCB area.	Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive interior modules. IC Role / Device Role / Timing Role: Industrial-grade EEPROM qualified for –40°C to +85°C operation with automotive-grade reliability. Use Value: Meets AEC-Q100 stress test requirements for endurance (1M cycles) and data retention (100 years) in harsh environments.

Smart Metering Module

Industrial PLC I/O Expansion

Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in utility meters operating on coin-cell batteries.

IC Role / Device Role / Timing Role: Nonvolatile configuration and event log storage with guaranteed 100-year data retention and 1M endurance.

Use Value: Eliminates need for external backup capacitors or supercapacitors due to ultra-low 1.0 µA standby current at 1.8V.

Use Scenario: Holding module identification, channel scaling factors, and fault history in modular I/O racks exposed to factory floor EMI.

IC Role / Device Role / Timing Role: Robust I²C EEPROM with Schmitt-triggered inputs and hardware write protection for field-deployed firmware updates.

Use Value: Prevents memory corruption during voltage transients via WP pin lock and noise-filtered bus interface.

Wearable Health Sensor

Automotive Body Control Unit

Use Scenario: Saving user-specific biometric thresholds and sensor calibration offsets in Bluetooth-enabled fitness trackers.

IC Role / Device Role / Timing Role: Low-voltage serial EEPROM interfacing directly with 1.8V ARM Cortex-M0+ MCU via I²C.

Use Value: Enables single-supply 1.8V system design without level-shifting circuitry, reducing BOM count and PCB area.

Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive interior modules.

IC Role / Device Role / Timing Role: Industrial-grade EEPROM qualified for –40°C to +85°C operation with automotive-grade reliability.

Use Value: Meets AEC-Q100 stress test requirements for endurance (1M cycles) and data retention (100 years) in harsh environments.

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 32K-bit capacity and 1.8V–5.5V range, but in 8-lead SOIC (8S1) and specified for 400 kHz at 1.8V	Higher-speed I²C operation suits faster host MCUs; surface-mount package reduces board space	Select when board layout requires SOIC footprint and system clock exceeds 100 kHz at 1.8V
M24C32-WMN6TP	STMicroelectronics 32K I²C EEPROM with identical 1.8V–5.5V range, 100 kHz @ 1.8V, and 8-lead PDIP (but marked as "industrial grade" only)	No WP pin - relies on software write protection; lacks same noise filtering on SDA/SCL	Choose only if hardware write protection is not required and cost sensitivity outweighs noise immunity needs

Compared with AT24C32D-SSHM-T, the AT24C32A-10PI-1.8 offers proven PDIP compatibility and stricter noise suppression, while M24C32-WMN6TP trades WP functionality and input filtering for lower unit cost in less demanding signal environments.

Availability

AT24C32A-10PI-1.8 is available at Aetrix Electronics and suitable for industrial control systems, battery-powered IoT endpoints, and automotive body electronics requiring stable component supply across extended product lifecycles.

Supply support for AT24C32A-10PI-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 memory solutions, with broad industrial and automotive qualification capabilities.

The AT24C32A-10PI-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-power, low-voltage nonvolatile storage in resource-constrained embedded systems where reliability and I²C simplicity are critical.

FAQ

What is the maximum I²C clock frequency supported by AT24C32A-10PI-1.8 at 1.8V?

The AT24C32A-10PI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at V_CC = 1.8V. This value is explicitly specified in the AC Characteristics table of the official datasheet (3054N–SEEPR–2/04) and reflects timing margins validated for reliable communication under low-voltage conditions. Higher frequencies like 400 kHz are only guaranteed at ≥2.5V.

Does AT24C32A-10PI-1.8 require an external pull-up resistor on the SDA line?

Yes, AT24C32A-10PI-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The datasheet specifies typical values of 4.7 kΩ for standard-mode (100 kHz) operation. Pull-ups must connect to the same V_CC rail used by the AT24C32A-10PI-1.8 to ensure proper logic levels and noise margin.

Can AT24C32A-10PI-1.8 be used in automotive applications?

The AT24C32A-10PI-1.8 is rated for industrial temperature (–40°C to +85°C) and carries automotive-grade qualification per the "Automotive Grade, Extended Temperature and Lead-free/Halogen-free Devices Available" statement in the datasheet. However, it is not AEC-Q100 certified; for production automotive ECUs, Microchip's AEC-Q100-qualified variants (e.g., AT24C32AN-10SE-2.7) are recommended instead of AT24C32A-10PI-1.8.

How does the write protect (WP) pin function on AT24C32A-10PI-1.8?

On AT24C32A-10PI-1.8, the WP pin is active-high: when tied to V_CC, it inhibits all write operations including byte, page, and erase commands, preserving memory contents during power transitions or firmware errors. When grounded or left floating (with <3 pF coupling), WP enables normal write access. Internal pull-down ensures safe default behavior if unconnected.

What package type is used for AT24C32A-10PI-1.8?

AT24C32A-10PI-1.8 uses an 8-lead JEDEC PDIP (Plastic Dual Inline Package) with 0.300" body width, designated as package code 8P3. This through-hole package is compatible with breadboards, socket-based test fixtures, and legacy industrial PCBs requiring manual assembly or high-reliability mechanical mounting.

AT24C32A-10PI-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:: 5ms

Access Time:: 900 ns

Voltage - Supply:: 1.8V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-PDIP

AT24C32A-10PI-1.8 FAQ

1.How can I place an order for AT24C32A-10PI-1.8 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C32A-10PI-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 AT24C32A-10PI-1.8 reliable?

The price and inventory of AT24C32A-10PI-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 AT24C32A-10PI-1.8 is usually 5 days.

3.What payment methods are accepted for AT24C32A-10PI-1.8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10PI-1.8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C32A-10PI-1.8?

AT24C32A-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C32A-10PI-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 AT24C32A-10PI-1.8?

For technical support, including AT24C32A-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10PI-1.8 requirements.

6.How does Aetrix verify that AT24C32A-10PI-1.8 is sourced from the original manufacturer or authorized distributors?

All AT24C32A-10PI-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 AT24C32A-10PI-1.8 meets industry standards.

7.What is the process for return or replacement of AT24C32A-10PI-1.8?

All AT24C32A-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10PI-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 AT24C32A-10PI-1.8 part is unused and in its original packaging.

Return procedure for AT24C32A-10PI-1.8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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