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Microchip Technology 24FC515-I/SM
- Part No.:
- 24FC515-I/SM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
24FC515-I/SM.pdf
- Description:
- IC EEPROM 512KBIT I2C 1MHZ 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:218
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Product details
Overview
24FC515-I/SM from Microchip Technology Inc. is a 64K × 8 (512 Kbit) I²C-compatible serial EEPROM with 1 MHz maximum clock frequency, 2.5–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It features 64-byte page write buffer, hardware write protection via WP pin, and Schmitt-trigger inputs for noise immunity-used in embedded systems for firmware parameter storage, calibration data retention, and configuration memory.
For engineers reviewing the 24FC515-I/SM datasheet, 24FC515-I/SM pinout, 24FC515-I/SM application, or 24FC515-I/SM equivalent, key selection considerations include its 1 MHz I²C speed advantage over 24LC515, industrial-grade reliability, SOIJ-8 package footprint, and compatibility with multi-device bus topologies requiring up to four cascaded EEPROMs.
Technical Context
The 24FC515-I/SM implements a two-wire I²C slave interface with fixed 4-bit control code (1010b), block-select bit (B0), and chip-select bits (A1, A0) enabling up to four devices on one bus. Its internal address counter supports current-address, random, and sequential reads across two 256 Kbit segments (0000h–7FFFh and 8000h–FFFFh).
Write operations use self-timed erase/write cycles with 5 ms max page write time and automatic address wraparound within 64-byte physical pages. The WP pin provides hardware-level array protection when tied to VCC, and all I/O pins feature Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64K × 8 (512 Kbit) - supports full system configuration storage without external expansion |
| Interface | I²C-compatible 2-wire serial - interoperable with standard microcontroller I²C peripherals |
| Max clock frequency | 1 MHz - enables faster firmware update throughput vs. 400 kHz alternatives |
| Supply voltage | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting |
| Page write buffer | 64 bytes - reduces write transaction count by 64× vs. byte-write-only EEPROMs |
| Data retention | >200 years - ensures long-term reliability in unpowered storage applications |
| Endurance | 1 million erase/write cycles - suitable for field-updatable parameter logging |
| Operating temperature | –40°C to +85°C (Industrial) - validated for deployment in industrial control and automotive cabin modules |
Pinout & Package
24FC515-I/SM is housed in an 8-lead SOIJ (Small Outline Integrated Circuit, J-bend) package, 5.28 mm wide, RoHS-compliant and Pb-free. Pin 1 is marked with a beveled corner or dot; orientation follows standard SOIC conventions with pin 1 at top-left when notch or marking is up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip Select Input | User-configurable LSB of device address; sets I²C slave address bit A0 (0 or 1) |
| A1 | Chip Select Input | User-configurable MSB of device address; sets I²C slave address bit A1 (0 or 1) |
| A2 | Fixed Chip Select | Must be hardwired to VCC; non-configurable enable signal - device ignores commands if floating or low |
| VSS | Ground Reference | System common return path; decoupling capacitor required near pin for noise suppression |
| SDA | Serial Data I/O | Open-drain bidirectional bus line; requires external pull-up (2 kΩ typical for 1 MHz operation) |
| SCL | Serial Clock Input | Master-generated clock; timing critical for 1 MHz compliance - min THIGH/TLOW = 500 ns each |
| WP | Write-Protect Control | Active-high hardware lock; ties entire 512 Kbit array read-only when pulled to VCC |
| VCC | Power Supply | 2.5–5.5 V input; powers internal charge pump for EEPROM programming; bypass with 0.1 µF ceramic |
Key Features
| Feature | Design Value |
|---|---|
| 1 MHz I²C clock support | Enables 2.5× faster write throughput than 400 kHz 24LC515 in high-volume configuration updates |
| Schmitt-trigger SDA/SCL inputs | Provides ≥50 ns spike suppression and noise margin >5% VCC - eliminates need for external RC filters |
| 64-byte page write buffer | Reduces 64-byte write latency from 64 × 5 ms to single 5 ms cycle - critical for real-time calibration logging |
| Hardware write protect (WP) | Prevents accidental firmware corruption during power-up/down transients or software faults |
| 1 million endurance cycles | Supports daily field updates for >27 years - exceeds automotive and industrial service life requirements |
| 200+ year data retention | Guarantees stored calibration constants remain valid across product end-of-life without refresh |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Memory |
|---|---|
|
Use Scenario: Storing sensor offset/gain coefficients and user-defined alarm thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime recalibration sequences. Use Value: 1 MHz interface allows full 512 Kbit parameter set reload in <100 ms; WP pin prevents unintended writes during ESD events on control cabinet wiring. |
Use Scenario: Retaining FDA-mandated calibration data and usage logs in portable diagnostic equipment subject to frequent battery cycling and thermal stress. IC Role / Device Role / Timing Role: Tamper-resistant, long-life data vault synchronized to host MCU's I²C master clock during maintenance mode. Use Value: 200-year retention and 1M-cycle endurance ensure audit trail integrity across 10+ years of clinical deployment without backup power or refresh logic. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Parameters |
|
Use Scenario: Holding seat/mirror position presets, lighting profiles, and CAN node configuration in automotive BCMs operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced directly to 3.3 V MCU I²C port; A0/A1 pins hardwired for fixed address. Use Value: SOIJ-8 package withstands reflow and vibration; 2.5 V min VCC ensures operation during cold-crank battery dips down to 2.7 V. |
Use Scenario: Storing tariff schedules, metering constants, and security keys in utility-grade smart meters certified to IEC 62056 and ANSI C12.22. IC Role / Device Role / Timing Role: Secure configuration store isolated from main application processor; WP pin tied permanently to VCC for regulatory write-lock compliance. Use Value: ESD protection >4 kV and 100 nA standby current minimize field failures and extend battery backup life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC515-I/SM | Max I²C clock = 400 kHz; same 512 Kbit density, SOIJ-8, and 2.5–5.5 V VCC range | Limited to lower-speed I²C buses; unsuitable where 1 MHz timing margins are required | Select only when system clock budget or MCU I²C peripheral limits prevent 1 MHz operation |
| AT24C512B-MAHM-T | Same 512 Kbit, SOIJ-8, 1.7–5.5 V; supports 1 MHz but lacks A2 pin - uses fixed 3-bit addressing (max 8 devices) | Higher device density per bus but no A2-based enable gating; different write-protection scheme (software-controlled) | Prefer when board space allows alternate footprint or when simplified address mapping outweighs hardware WP requirement |
Compared with 24LC515-I/SM, the 24FC515-I/SM delivers 2.5× faster configuration writes and identical industrial temp reliability; versus AT24C512B-MAHM-T, it offers hardware-enforced write protection and deterministic A2-based device enable-critical for safety-critical or tamper-evident designs.
Availability
24FC515-I/SM is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, smart energy meters, and embedded IoT gateways requiring stable component supply across extended product lifecycles.
Supply support for 24FC515-I/SM 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24FC515 belongs to Microchip's 24XX515 family of I²C EEPROMs engineered for robust, low-power nonvolatile storage in resource-constrained embedded systems where reliability, longevity, and bus speed matter.
FAQ
What is the maximum I²C clock frequency supported by the 24FC515-I/SM?
The 24FC515-I/SM supports up to 1 MHz I²C clock frequency when VCC is between 2.5 V and 5.5 V. This is a key differentiator from the 24LC515-I/SM (400 kHz max) and enables faster firmware and configuration updates. Timing parameters such as THIGH and TLOW are guaranteed to be ≥500 ns at this speed, per DS21673G-page 3, Table 1-2.
How does the A2 pin function on the 24FC515-I/SM?
The A2 pin on the 24FC515-I/SM is a non-configurable chip select that must be hardwired to VCC for the device to operate. Unlike A0 and A1, A2 is not used for address selection-it acts as an enable signal. If left floating or tied to VSS, the 24FC515-I/SM will not respond to I²C commands, as specified in DS21673G-page 5, Section 2.2.
Can the 24FC515-I/SM perform sequential reads across its full 512 Kbit address space?
No. Sequential reads on the 24FC515-I/SM are limited to 256 Kbit blocks due to internal addressing boundaries: reads can span addresses 0000h–7FFFh or 8000h–FFFFh, but not across the 7FFFh/8000h boundary. To read the full array sequentially, software must issue separate read commands for each block, as detailed in DS21673G-page 11, Section 8.3.
What is the purpose of the WP pin on the 24FC515-I/SM?
The WP (Write-Protect) pin on the 24FC515-I/SM provides hardware-level write inhibition. When tied to VCC, all write operations-including byte and page writes-are blocked while read operations remain fully functional. The pin is sampled at the Stop bit of each write command, making it effective against accidental or malicious writes during power transitions or software faults.
Is the 24FC515-I/SM compatible with 1.8 V I²C buses?
No. The 24FC515-I/SM requires a minimum VCC of 2.5 V and is not rated for 1.8 V operation. For 1.8 V systems, Microchip's 24AA515-I/SM (1.7–5.5 V) is the compatible alternative in the same family. The 24FC515-I/SM's 2.5 V lower limit is explicitly defined in the Device Selection Table on DS21673G-page 1.
24FC515-I/SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 400 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIJ
24FC515-I/SM FAQ
1.How can I place an order for 24FC515-I/SM through Aetrix?
Please submit a Request for Quotation (RFQ) for 24FC515-I/SM 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 24FC515-I/SM reliable?
The price and inventory of 24FC515-I/SM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24FC515-I/SM is usually 5 days.
3.What payment methods are accepted for 24FC515-I/SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24FC515-I/SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24FC515-I/SM?
24FC515-I/SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24FC515-I/SM 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 24FC515-I/SM?
For technical support, including 24FC515-I/SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24FC515-I/SM requirements.
6.How does Aetrix verify that 24FC515-I/SM is sourced from the original manufacturer or authorized distributors?
All 24FC515-I/SM 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 24FC515-I/SM meets industry standards.
7.What is the process for return or replacement of 24FC515-I/SM?
All 24FC515-I/SM units undergo pre-shipment inspection (PSI). If there is an issue with 24FC515-I/SM, 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 24FC515-I/SM part is unused and in its original packaging.
Return procedure for 24FC515-I/SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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