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Microchip Technology AT24C512C-SSHM-B
- Part No.:
- AT24C512C-SSHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C512C-SSHM-B.pdf
- Description:
- IC EEPROM 512KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,150
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Product details
Overview
AT24C512C-SSHM-B 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, featuring 1 MHz Fast Mode Plus support, hardware write protection (WP), and industrial temperature range (–40°C to +85°C). It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C512C-SSHM-B datasheet, AT24C512C-SSHM-B pinout, AT24C512C-SSHM-B application, or AT24C512C-SSHM-B equivalent, key selection criteria include I²C bus voltage compatibility (1.7–5.5V), page write capability (128-byte pages), write endurance (1M cycles), and package-specific pin mapping for SOIC-8 footprint integration.
Technical Context
The AT24C512C-SSHM-B implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) clock rates depending on VCC level. Its internal architecture includes a 65,536-word × 8-bit EEPROM array, addressable via three hardware pins (A0–A2) enabling up to eight devices on one bus.
It features a dedicated Write-Protect (WP) pin that disables all writes when pulled high, and integrates a Power-on Reset (POR) circuit with 100 µs tPUP delay and 1.5 V VPOR threshold. The device uses open-drain SDA with external pull-up and latches data on SCL rising edge while outputting on falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (65,536 × 8), directly addressable via 16-bit word address for precise byte-level access |
| Voltage range | 1.7–3.6 V or 2.5–5.5 V - dual-grade operation enables use across low-power and legacy 5 V systems |
| I²C speed modes | 100 kHz (1.7–5.5 V), 400 kHz (1.7–5.5 V), 1 MHz FM+ (2.5–5.5 V) - selectable timing for bandwidth vs. noise immunity trade-offs |
| Write endurance | 1,000,000 cycles - supports frequent firmware parameter updates without premature wear-out |
| Data retention | 100 years at 55°C - ensures long-term reliability in industrial deployments without refresh logic |
| Active/standby current | ≤3 mA active (read/write), ≤6 µA standby - minimizes quiescent power in battery-backed or energy-harvesting designs |
| Page write size | 128-byte pages with partial-write support - reduces write latency versus single-byte writes and avoids unnecessary erase overhead |
Pinout & Package
AT24C512C-SSHM-B is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm), RoHS-compliant and halide-free, with standard JEDEC MS-012AC footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hardware-selectable LSB of 3-bit slave address; pulled down internally if floating - enables multi-device bus addressing |
| A1 | Device address input | Middle bit of slave address; must be hard-wired for deterministic I²C arbitration - no floating connections recommended |
| A2 | Device address input | MSB of slave address; sets unique 7-bit I²C address (1010xxxA) alongside A0/A1 - supports up to eight parallel devices |
| GND | Ground reference | System return path for VCC and I/O; must connect to stable PCB ground plane to ensure noise immunity and POR stability |
| SDA | Serial data bidirectional line | Open-drain I/O requiring external pull-up (≤10 kΩ); transmits/receives I²C data and ACK/NACK - shared across multiple slaves |
| SCL | Serial clock input | Master-generated clock; rising edge latches input, falling edge outputs data - must be pulled high or driven actively |
| WP | Hardware write-protect | Active-high lock: tied to VCC blocks all writes to full memory array - prevents accidental corruption during power transitions |
| VCC | Power supply | 1.7–3.6 V or 2.5–5.5 V input; requires local 100 nF decoupling near pin to suppress switching noise and ensure POR integrity |
Key Features
| Feature | Design Value |
|---|---|
| Fast Mode Plus (1 MHz) | Enables high-throughput configuration loading in time-critical boot sequences without sacrificing voltage flexibility |
| Schmitt-trigger inputs with filtering | Rejects >50 ns noise spikes on SDA/SCL - eliminates false start/stop detection in electrically noisy industrial environments |
| 128-byte page write with partial capability | Reduces typical write time from ~5 ms per byte to ~5 ms per 128-byte block - improves system responsiveness during bulk updates |
| Internal pull-down on A0/A1/A2/WP | Ensures deterministic default addressing and write-enable state on power-up - removes need for external bias resistors in simple applications |
| ESD protection >4 kV | Withstands handling and board-level ESD events per HBM - reduces field failure risk in unshielded industrial enclosures |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and firmware update flags in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent state retention across cold starts and brownouts. Use Value: Enables zero-configuration recovery after power loss and supports field-upgradable logic without external programming hardware. | Use Scenario: Holding sensor offset/gain coefficients, patient history timestamps, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant data vault with hardware WP pin preventing unauthorized calibration changes. Use Value: Meets IEC 62304 Class C software requirements for data integrity and supports 100-year retention for lifetime device traceability. |
| Smart Energy Meter Firmware Parameters | Automotive Body Control Module Settings |
Use Scenario: Saving tariff schedules, pulse-count thresholds, and communication protocol settings in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: Low-power I²C slave interfacing with metrology SoC; accessed only during meter initialization or remote firmware update. Use Value: 6 µA standby current extends battery backup life beyond 10 years; 1.7 V operation ensures functionality during brownout conditions. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive BCMs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Automotive-grade EEPROM integrated into CAN/LIN gateway subsystem for user preference persistence. Use Value: Industrial temperature rating and 1M write endurance support repeated personalization cycles over 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 |
|---|---|---|---|
| AT24C512BN-SH-B | Same 512-Kbit capacity and SOIC-8 package, but rated for 1.8–5.5 V only (no 1.7 V low-voltage grade) | Lacks guaranteed operation below 1.8 V - unsuitable for ultra-low-power 1.7 V microcontroller interfaces | Select AT24C512C-SSHM-B when 1.7 V compatibility or extended voltage margin is required. |
| BR24G512FJ-WE2 | Rohm 512-Kbit I²C EEPROM in 8-pin TSSOP; supports 1.6–5.5 V, 1 MHz FM+, but lacks hardware WP pin | No dedicated write-protect terminal - requires software-based locking or external GPIO control for data security | Choose AT24C512C-SSHM-B where hardware-level write inhibition is mandatory for safety-critical calibration data. |
Compared with AT24C512BN-SH-B, AT24C512C-SSHM-B adds 1.7 V operation for deeper battery discharge tolerance; versus BR24G512FJ-WE2, it provides integrated WP pin for fail-safe write blocking without firmware dependency or additional components.
Availability
AT24C512C-SSHM-B is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, smart energy meters, automotive body control modules, and IoT edge node configuration storage requiring stable component supply across extended temperature and voltage ranges.
Supply support for AT24C512C-SSHM-B 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24C512C-SSHM-B belongs to Microchip's AT24C family of I²C serial EEPROMs, designed specifically for robust, low-power nonvolatile data storage in space-constrained industrial and automotive systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24C512C-SSHM-B?
The AT24C512C-SSHM-B supports up to 1 MHz Fast Mode Plus (FM+) operation, but only when VCC is between 2.5 V and 5.5 V. At 1.7–2.5 V, the maximum clock rate is limited to 400 kHz Fast mode. This voltage-dependent speed grading ensures signal integrity and noise immunity across its full operating range.
Does the AT24C512C-SSHM-B require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C512C-SSHM-B requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a CMOS input. Microchip specifies maximum pull-up values of 10 kΩ for 100 kHz, 4 kΩ for 400 kHz, and 1.3 kΩ for 1 MHz operation to meet rise-time requirements per I²C specification.
How does the Write-Protect (WP) pin function on the AT24C512C-SSHM-B?
When the WP pin of the AT24C512C-SSHM-B is driven high (to VCC), all write operations-including byte, page, and sequential writes-are inhibited across the entire 512-Kbit memory array. When WP is low (GND) or floating (internally pulled down), normal write functionality is enabled. This hardware lock operates independently of I²C commands.
What is the memory organization and addressing scheme of the AT24C512C-SSHM-B?
The AT24C512C-SSHM-B organizes its 512 Kbit as 65,536 words × 8 bits, addressed using a 16-bit word address transmitted after the 7-bit I²C slave address. The slave address is formed as 1010 A2 A1 A0 R/W, where A0–A2 are hardware-configurable pins allowing up to eight devices on one bus.
Can the AT24C512C-SSHM-B operate reliably at –40°C?
Yes, the AT24C512C-SSHM-B is fully specified for industrial temperature operation from –40°C to +85°C. All electrical characteristics-including write cycle time (≤5 ms), standby current (≤6 µA), and I²C timing parameters-are guaranteed across this full range, making it suitable for outdoor, automotive, and factory-floor applications.
AT24C512C-SSHM-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- 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-SOIC
AT24C512C-SSHM-B FAQ
1.How can I place an order for AT24C512C-SSHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C512C-SSHM-B 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-SSHM-B reliable?
The price and inventory of AT24C512C-SSHM-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C512C-SSHM-B is usually 5 days.
3.What payment methods are accepted for AT24C512C-SSHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C512C-SSHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C512C-SSHM-B?
AT24C512C-SSHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C512C-SSHM-B 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-SSHM-B?
For technical support, including AT24C512C-SSHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C512C-SSHM-B requirements.
6.How does Aetrix verify that AT24C512C-SSHM-B is sourced from the original manufacturer or authorized distributors?
All AT24C512C-SSHM-B 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-SSHM-B meets industry standards.
7.What is the process for return or replacement of AT24C512C-SSHM-B?
All AT24C512C-SSHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C512C-SSHM-B, 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-SSHM-B part is unused and in its original packaging.
Return procedure for AT24C512C-SSHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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