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

Microchip Technology AT24C512C-SHM-T

Name: AT24C512C-SHM-T
Brand: Microchip Technology
SKU: AT24C512C-SHM-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C512C-SHM-T

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.209", 5.30mm Width)

Datasheet:: AT24C512C-SHM-T.pdf

Description:: IC EEPROM 512KBIT I2C 8SOIJ

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Product details

Overview

AT24C512C-SHM-T from Microchip Technology is a 512-Kbit I²C-compatible serial EEPROM organized as 65,536 × 8 bits, operating from 1.7V to 3.6V or 2.5V to 5.5V, with industrial temperature range (−40°C to +85°C), 1 MHz Fast Mode Plus support, and hardware write protection via WP pin - deployed in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.

For engineers reviewing the AT24C512C-SHM-T datasheet, AT24C512C-SHM-T pinout, AT24C512C-SHM-T application, or AT24C512C-SHM-T equivalent, key selection criteria include voltage-grade compatibility (1.7–3.6V vs. 2.5–5.5V), page-write timing (≤5 ms), endurance (1M cycles), and package-specific pin mapping for SOIC-8 footprint integration.

Technical Context

The AT24C512C-SHM-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs, supporting Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) clock rates across dual V_CC ranges. It uses an internal high-voltage generation circuit for EEPROM programming and features automatic address decoding via A0–A2 pins.

Memory is partitioned into 512 pages of 128 bytes each, enabling partial-page writes and sequential reads. Write protection is implemented via dedicated WP pin logic that inhibits all array writes when pulled high, while internally pulled-down address and WP pins ensure deterministic startup behavior without external biasing.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	512 Kbit (65,536 × 8), directly addressable via 16-bit word address for full array access
V_CC range	1.7V–3.6V (low-voltage grade) or 2.5V–5.5V (standard-voltage grade); supports mixed-voltage system interfacing
I²C speed modes	100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus); enables high-throughput firmware updates in constrained buses
Write endurance	1,000,000 cycles per memory location - sufficient for daily parameter logging over 27 years
Data retention	100 years at 55°C - ensures long-term calibration stability in sealed industrial enclosures
Active/standby current	Max 3 mA active (write/read), max 6 μA standby - critical for battery-backed real-time clocks and energy-harvesting nodes
Page write time	≤5 ms self-timed cycle - eliminates need for external polling delay in time-critical bootloaders
ESD rating	>4,000 V HBM - meets IEC 61000-4-2 Level 3 for robustness in field-deployed equipment

Pinout & Package

AT24C512C-SHM-T is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm body, 1.27 mm pitch), with pin 1 marked by notch or bevel. Pin functions are electrically identical across SOIC, TSSOP, and UDFN variants but differ in physical layout for WLCSP/VFBGA.

Pin/Terminal	Circuit Role	Design Meaning
A0	Hardware device address input	Configures LSB of 7-bit I²C slave address (1010xxxR/W); tied low/high to enable up to 8 devices on same bus
A1	Hardware device address input	Configures middle bit of slave address; floating state defaults to logic 0 via internal strong pull-down
A2	Hardware device address input	Configures MSB of slave address; required for multi-device arbitration in modular systems
GND	Power reference ground	Must connect to system ground plane; shared return path for SDA/SCL pull-ups and V_CC decoupling
SDA	Bidirectional open-drain data line	Requires external 1.3–10 kΩ pull-up to V_CC; supports wire-OR with other I²C slaves on same bus
SCL	Input clock line	Driven by master only; rising edge latches input, falling edge outputs data - defines strict timing compliance window
WP	Hardware write-protect control	Pulled high to disable all writes (full-array lock); pulled low for normal operation; internal pull-down ensures safe default
V_CC	Device power supply	Accepts dual voltage grades; must ramp monotonically at ≤0.1 V/µs during power-up to avoid POR failure

Key Features

Feature	Design Value
128-byte page write mode	Enables burst writes without inter-byte delays - reduces firmware update time by >90% vs. byte-by-byte writes
Schmitt-triggered, filtered inputs	Rejects <50 ns noise spikes on SDA/SCL - eliminates false start/stop detection in electrically noisy motor-control environments
Internal power-on reset (POR)	Guarantees device remains unresponsive until V_CC ≥1.5 V and stable for ≥100 µs - prevents spurious writes during brown-out recovery
Green RoHS-compliant packaging	Lead-free, halide-free 8-lead SOIC - satisfies IPC-J-STD-609A Class 1 moisture sensitivity and EU REACH requirements
Software reset capability	Releases stuck SDA via ≤9 dummy SCL clocks - avoids mandatory power cycle during I²C bus lockup in remote deployments
Address pin internal pull-down	Ensures deterministic A0/A1/A2 = 000 state if left unconnected - simplifies prototype bring-up and reduces BOM count

Applications

Industrial Sensor Calibration Storage	Embedded System Configuration Backup
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at power-on reset; retains values across 10+ year product lifecycle. Use Value: Eliminates need for external trimming potentiometers and manual calibration - reduces assembly cost and field drift by leveraging 100-year data retention.	Use Scenario: Saving user-modified settings (network IP, display brightness, alarm thresholds) in medical infusion pumps. IC Role / Device Role / Timing Role: Fail-safe configuration store updated only on explicit save command; isolated from main MCU flash wear cycles. Use Value: Prevents loss of critical operational parameters during unexpected power loss - enabled by ≤5 ms page writes and hardware WP pin lock during runtime.
Power-Fail Event Logging	Firmware Patch Storage
Use Scenario: Recording timestamped voltage sag events and thermal shutdowns in smart grid meters for predictive maintenance. IC Role / Device Role / Timing Role: High-endurance write buffer (1M cycles) capturing transient faults at 10 Hz sample rate for 27+ years. Use Value: Achieves 10× longer logging duration than standard EEPROMs - made possible by ultra-low 6 μA standby current and robust 1.7V operation.	Use Scenario: Holding signed firmware patches in IoT gateways for secure over-the-air (OTA) updates without modifying main application flash. IC Role / Device Role / Timing Role: Secure auxiliary code store with hardware write-protection (WP pin) preventing unauthorized patch injection. Use Value: Enables field-upgradable functionality while maintaining bootloader integrity - supported by I²C Fast Mode Plus (1 MHz) for sub-second patch transfers.

Industrial Sensor Calibration Storage

Embedded System Configuration Backup

Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at power-on reset; retains values across 10+ year product lifecycle.

Use Value: Eliminates need for external trimming potentiometers and manual calibration - reduces assembly cost and field drift by leveraging 100-year data retention.

Use Scenario: Saving user-modified settings (network IP, display brightness, alarm thresholds) in medical infusion pumps.

IC Role / Device Role / Timing Role: Fail-safe configuration store updated only on explicit save command; isolated from main MCU flash wear cycles.

Use Value: Prevents loss of critical operational parameters during unexpected power loss - enabled by ≤5 ms page writes and hardware WP pin lock during runtime.

Power-Fail Event Logging

Firmware Patch Storage

Use Scenario: Recording timestamped voltage sag events and thermal shutdowns in smart grid meters for predictive maintenance.

IC Role / Device Role / Timing Role: High-endurance write buffer (1M cycles) capturing transient faults at 10 Hz sample rate for 27+ years.

Use Value: Achieves 10× longer logging duration than standard EEPROMs - made possible by ultra-low 6 μA standby current and robust 1.7V operation.

Use Scenario: Holding signed firmware patches in IoT gateways for secure over-the-air (OTA) updates without modifying main application flash.

IC Role / Device Role / Timing Role: Secure auxiliary code store with hardware write-protection (WP pin) preventing unauthorized patch injection.

Use Value: Enables field-upgradable functionality while maintaining bootloader integrity - supported by I²C Fast Mode Plus (1 MHz) for sub-second patch transfers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C512BN-SH-B	Same 512-Kbit capacity and SOIC-8 package, but rated for 1.8V–5.5V operation (no 1.7V low-voltage grade)	Lacks guaranteed 1.7V operation - unsuitable for ultra-low-power coin-cell applications below 1.8V	Select AT24C512BN-SH-B only if system V_CC never drops below 1.8V; otherwise retain AT24C512C-SHM-T for true 1.7V compatibility.
M24512-RMN6TP	512-Kbit I²C EEPROM in 8-lead SOIC, but supports only 100/400 kHz modes (no 1 MHz FM+), and max 100-year retention at 25°C (not 55°C)	Lower temperature-rated retention and no FM+ support - limits use in high-temp industrial enclosures requiring fast reprogramming	Choose M24512-RMN6TP for cost-sensitive consumer designs where 400 kHz speed and 25°C retention suffice.

Compared with AT24C512BN-SH-B and M24512-RMN6TP, the AT24C512C-SHM-T uniquely delivers verified 1.7V operation, 1 MHz Fast Mode Plus, and 100-year data retention at 55°C - making it the only option qualified for battery-powered, high-reliability, thermally demanding embedded systems.

Availability

AT24C512C-SHM-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration backup, and power-fail event logging requiring stable component supply across extended temperature and voltage ranges.

Supply support for AT24C512C-SHM-T 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 industrial, automotive, and communications markets.

The AT24C512C-SHM-T belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, engineered for low-voltage, high-reliability data retention in space-constrained embedded systems with stringent power and longevity requirements.

FAQ

What voltage ranges does the AT24C512C-SHM-T support, and how do they affect system design?

The AT24C512C-SHM-T supports two distinct V_CC ranges: 1.7V–3.6V (low-voltage grade) and 2.5V–5.5V (standard-voltage grade). This dual-range capability allows direct integration into both ultra-low-power battery systems (e.g., coin-cell powered sensors) and legacy 3.3V/5V industrial controllers without level-shifting. The 1.7V minimum enables operation during deep brown-out conditions where other EEPROMs fail, ensuring continuous parameter retention even as main supply sags.

How does the WP pin on the AT24C512C-SHM-T function, and what happens if it's left unconnected?

The WP (Write-Protect) pin on the AT24C512C-SHM-T disables all write operations to the entire memory array when pulled high to V_CC. If left unconnected, the pin is internally pulled down to GND, enabling normal writes - but Microchip strongly recommends tying WP to a known state (GND or V_CC) due to capacitive coupling risks in noisy environments. This internal pull-down ensures safe default behavior, yet intentional connection prevents accidental corruption during ESD events or signal crosstalk.

What is the maximum I²C clock frequency supported by the AT24C512C-SHM-T, and under what conditions?

The AT24C512C-SHM-T supports up to 1 MHz I²C communication in Fast Mode Plus (FM+), but only when V_CC is between 2.5V and 5.5V. At lower voltages (1.7V–2.5V), it operates in Fast Mode (400 kHz) or Standard Mode (100 kHz). This graded speed support ensures reliable high-throughput firmware updates in 3.3V/5V systems while maintaining noise immunity and timing margin in 1.8V battery-powered nodes - a key differentiator from EEPROMs limited to 400 kHz across all voltages.

Can the AT24C512C-SHM-T be used in systems with multiple EEPROMs on the same I²C bus, and how is addressing managed?

Yes, the AT24C512C-SHM-T supports up to eight devices on a single I²C bus using hardware-configurable slave addresses via A0, A1, and A2 pins. Each pin sets one bit of the 3-bit hardware address portion (bits 3–1) of the 7-bit I²C address (1010xxxR/W), allowing unique addressing without software configuration. All three pins default to logic 0 if unconnected, giving base address 0x50 - enabling immediate multi-device operation with minimal external components.

What is the write endurance and data retention specification for the AT24C512C-SHM-T, and how are these validated?

The AT24C512C-SHM-T guarantees 1,000,000 write cycles per memory location and 100 years of data retention at 55°C - both validated through accelerated life testing and qualification per AEC-Q200 stress protocols. These figures are not typical estimates but minimum specifications backed by Microchip's reliability reporting. The 100-year retention at elevated temperature ensures calibration data remains intact in sealed industrial enclosures where ambient temperatures routinely exceed 50°C.

AT24C512C-SHM-T Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 512Kbit

Memory Organization:: 64K x 8

Memory Interface:: I2C

Clock Frequency:: 400 kHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 900 ns

Voltage - Supply:: 1.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIJ

AT24C512C-SHM-T FAQ

1.How can I place an order for AT24C512C-SHM-T through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C512C-SHM-T 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 AT24C512C-SHM-T reliable?

The price and inventory of AT24C512C-SHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C512C-SHM-T is usually 5 days.

3.What payment methods are accepted for AT24C512C-SHM-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512C-SHM-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C512C-SHM-T?

AT24C512C-SHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C512C-SHM-T 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 AT24C512C-SHM-T?

For technical support, including AT24C512C-SHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512C-SHM-T requirements.

6.How does Aetrix verify that AT24C512C-SHM-T is sourced from the original manufacturer or authorized distributors?

All AT24C512C-SHM-T 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 AT24C512C-SHM-T meets industry standards.

7.What is the process for return or replacement of AT24C512C-SHM-T?

All AT24C512C-SHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512C-SHM-T, 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 AT24C512C-SHM-T part is unused and in its original packaging.

Return procedure for AT24C512C-SHM-T:

1.Submit a request within 90 days.

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

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