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Microchip Technology 24FC515T-I/SM
- Part No.:
- 24FC515T-I/SM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
24FC515T-I/SM.pdf
- Description:
- IC EEPROM 512KBIT I2C 1MHZ 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,491
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Product details
Overview
24FC515T-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, industrial temperature rating (–40°C to +85°C), and 64-byte page write buffer. It serves as nonvolatile configuration/data storage in embedded control systems requiring robust, low-power memory with hardware write protection.
For engineers reviewing the 24FC515T-I/SM datasheet, 24FC515T-I/SM pinout, 24FC515T-I/SM application, or 24FC515T-I/SM equivalent, key selection considerations include its 1 MHz I²C speed (vs. 400 kHz for 24LC515), VCC min of 2.5 V, A2 hardwired-to-VCC requirement, WP-enabled hardware write protection, and SOIJ-8 packaging with Pb-free RoHS compliance.
Technical Context
The 24FC515T-I/SM implements a two-wire I²C interface with Schmitt-trigger inputs and slew-rate-controlled outputs to suppress noise and eliminate ground bounce. Its internal address counter supports current-address, random, and sequential reads across two 256 Kbit blocks (0000h–7FFFh and 8000h–FFFFh), with block-select bit B0 replacing A15.
Write operations use self-timed erase/write cycles with up to 64-byte page buffering; page writes wrap within physical 64-byte boundaries and require software boundary management. The device requires A2 tied to VCC for operation and uses A0/A1 for cascading up to four devices on one bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64K × 8 (512 Kbit); provides sufficient nonvolatile storage for firmware parameters, calibration data, or event logs in space-constrained designs. |
| Interface | I²C-compatible 2-wire serial; enables simple, low-pin-count integration with microcontrollers without dedicated memory buses. |
| Max clock frequency | 1 MHz (at VCC ≥ 2.5 V); doubles throughput vs. 400 kHz variants, reducing write latency in high-frequency polling or burst-write scenarios. |
| Supply voltage | 2.5 V to 5.5 V; compatible with 3.3 V and 5 V logic domains, but excludes sub-2.5 V operation unlike 24AA515. |
| Page write buffer | 64 bytes; allows efficient bulk writes with single Stop condition, minimizing bus occupancy and host CPU overhead. |
| Endurance & retention | 1 million erase/write cycles; >200 years data retention; suitable for applications with frequent field updates or long service life requirements. |
| Write protection | Hardware WP pin; disables all writes when pulled high, preventing accidental overwrites during power-up or firmware glitches. |
Pinout & Package
24FC515T-I/SM is housed in an 8-lead SOIJ (Small Outline Integrated Circuit, J-bend) package, Pb-free and RoHS compliant, with 5.28 mm body width and standard JEDEC MO-153 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | User-configurable chip select input | Hardwired or controlled by MCU to set LSB of 7-bit slave address; enables up to four devices on same I²C bus. |
| A1 | User-configurable chip select input | Hardwired or controlled by MCU to set MSB of 7-bit slave address; used with A0 for 2-bit device addressing. |
| A2 | Non-configurable chip select input | Must be connected to VCC; device will not operate if floating or tied to VSS - critical for functional validation. |
| VSS | Ground reference | Common return path for all internal circuitry; requires low-impedance connection to system ground plane. |
| SDA | Bidirectional serial data line | Open-drain output; requires external pull-up resistor (2 kΩ typical for 1 MHz); carries address, command, and data. |
| SCL | Serial clock input | Master-generated clock synchronizing all transfers; Schmitt-trigger input ensures noise immunity at 1 MHz. |
| WP | Hardware write-protect input | Pulled high to disable all writes (read-only mode); sampled at Stop bit - toggling mid-cycle has no effect. |
| VCC | Positive supply | 2.5–5.5 V DC input; powers EEPROM array, control logic, and I/O buffers; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| 1 MHz I²C clock support | Enables faster configuration loading and logging vs. 400 kHz EEPROMs, reducing system boot time and improving real-time responsiveness. |
| Schmitt-trigger SDA/SCL inputs | Provides 50 ns spike suppression and 0.05×VCC hysteresis, ensuring reliable operation in electrically noisy industrial environments. |
| 64-byte page write buffer | Allows writing up to 64 bytes per transaction without intermediate acknowledgments, cutting I²C bus utilization by ~90% vs. byte-wise writes. |
| Hardware write-protect (WP) | Prevents unintended writes during brown-out, reset, or firmware faults - eliminates need for software lock mechanisms or CRC-based validation. |
| Industrial temperature range | Guaranteed operation from –40°C to +85°C, supporting deployment in automotive ECUs, industrial PLCs, and outdoor metering equipment. |
Applications
| Smart Energy Metering | Automotive Body Control Module |
|---|---|
Use Scenario: Storing tariff schedules, consumption history, and tamper-event timestamps in utility meters operating unattended for 10+ years. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage with hardware write protection to prevent unauthorized parameter changes. Use Value: 1M endurance and >200-year data retention ensure integrity across full product lifecycle without battery-backed SRAM. | Use Scenario: Saving seat/mirror position presets, door lock status, and lighting profiles in vehicle body controllers exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Persistent parameter storage interfacing directly to 3.3 V microcontroller I²C bus with 1 MHz speed for fast recall during ignition-on. Use Value: SOIJ-8 package withstands reflow and vibration; WP pin prevents corruption during ECU reset sequences. |
| Industrial PLC I/O Module | Medical Diagnostic Equipment |
Use Scenario: Retaining calibration coefficients, sensor offset values, and firmware update flags in modular I/O cards deployed in factory automation systems. IC Role / Device Role / Timing Role: Configuration memory accessed during module power-up and runtime diagnostics via isolated I²C interface. Use Value: 2.5–5.5 V operation matches wide-input DC-DC supplies; 64-byte page writes accelerate calibration data upload during maintenance. | Use Scenario: Storing device serial numbers, usage counters, and safety-critical calibration constants in portable ultrasound or infusion pumps. IC Role / Device Role / Timing Role: Secure, write-protected nonvolatile memory for regulatory-mandated traceability data and operational logs. Use Value: Hardware WP eliminates risk of accidental overwrite during field servicing; RoHS/Pb-free compliance meets medical device directives. |
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 2.5–5.5 V range, SOIJ-8 package, and 64-byte page buffer. | Limited to lower-speed systems where 1 MHz timing margins are unavailable or unnecessary. | Select when cost sensitivity outweighs speed requirement and existing 400 kHz bus design avoids timing revalidation. |
| AT24C512-MAHM-T | Same 512 Kbit density and I²C interface, but rated for 1 MHz only down to 2.7 V; different pinout (SOIC-8, not SOIJ). | Requires PCB layout change due to SOIC vs. SOIJ leadform; lacks A2 hardwire requirement. | Consider only if SOIC-8 footprint is already allocated and 2.7 V minimum supply is acceptable. |
Compared with 24LC515-I/SM, the 24FC515T-I/SM delivers 2.5× faster I²C throughput at identical voltage and package; versus AT24C512-MAHM-T, it offers guaranteed 2.5 V operation and SOIJ-8 compatibility but mandates A2=VCC - a critical layout constraint not present in the Atmel part.
Availability
24FC515T-I/SM is available at Aetrix Electronics and suitable for smart energy metering, automotive body control modules, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply across extended production lifecycles.
Supply support for 24FC515T-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 24FC515T-I/SM belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power nonvolatile storage in industrial, automotive, and consumer applications demanding high endurance and robust I²C communication.
FAQ
What is the minimum supply voltage required for reliable operation of the 24FC515T-I/SM?
The 24FC515T-I/SM requires a minimum supply voltage of 2.5 V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Unlike the 24AA515 variant, it does not support operation below 2.5 V - attempting to power it at 1.8 V or 2.2 V will result in undefined behavior or failure to respond on the I²C bus.
Does the 24FC515T-I/SM support 1 MHz I²C communication at all supply voltages?
Yes, the 24FC515T-I/SM supports 1 MHz I²C clock frequency exclusively at VCC ≥ 2.5 V. This is explicitly specified in Table 1-2 of the DS21673G datasheet. At lower voltages (which do not apply to this part), the max clock drops to 400 kHz or 100 kHz - but since 24FC515T-I/SM's VCC range starts at 2.5 V, 1 MHz is its full-speed operational mode.
Why must the A2 pin of the 24FC515T-I/SM be connected to VCC?
The A2 pin of the 24FC515T-I/SM is a non-configurable chip select input that must be hardwired to VCC for the device to function. As stated in Section 2.2 of the datasheet, leaving A2 floating or tying it to VSS prevents operation entirely - this is a mandatory hardware requirement, not a recommendation, and applies uniquely to the 24FC515T-I/SM within the 24XX515 family.
How does the 24FC515T-I/SM handle page write operations that cross physical page boundaries?
The 24FC515T-I/SM wraps page write data back to the start of the current 64-byte page when a write crosses a boundary - it does not auto-advance to the next page. For example, writing 65 bytes starting at address 0xFFC0 (where page ends at 0xFFFF) causes bytes 64–65 to overwrite addresses 0xFFC0–0xFFC1. Application firmware must enforce page alignment to avoid unintended data loss.
Is the 24FC515T-I/SM pin-compatible with the 24LC515-I/SM?
Yes, the 24FC515T-I/SM is pin-compatible with the 24LC515-I/SM: both use identical SOIJ-8 packaging, share the same pin functions (A0, A1, A2, VSS, SDA, SCL, WP, VCC), and require A2 tied to VCC. However, they differ electrically - the 24FC515T-I/SM supports 1 MHz I²C while the 24LC515-I/SM is limited to 400 kHz - so timing validation is required after substitution.
24FC515T-I/SM 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:
- 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
24FC515T-I/SM FAQ
1.How can I place an order for 24FC515T-I/SM through Aetrix?
Please submit a Request for Quotation (RFQ) for 24FC515T-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 24FC515T-I/SM reliable?
The price and inventory of 24FC515T-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 24FC515T-I/SM is usually 5 days.
3.What payment methods are accepted for 24FC515T-I/SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24FC515T-I/SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24FC515T-I/SM?
24FC515T-I/SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24FC515T-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 24FC515T-I/SM?
For technical support, including 24FC515T-I/SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24FC515T-I/SM requirements.
6.How does Aetrix verify that 24FC515T-I/SM is sourced from the original manufacturer or authorized distributors?
All 24FC515T-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 24FC515T-I/SM meets industry standards.
7.What is the process for return or replacement of 24FC515T-I/SM?
All 24FC515T-I/SM units undergo pre-shipment inspection (PSI). If there is an issue with 24FC515T-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 24FC515T-I/SM part is unused and in its original packaging.
Return procedure for 24FC515T-I/SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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