My Inquiry
My Account
Microchip Technology 24LC515-I/SM
- Part No.:
- 24LC515-I/SM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
24LC515-I/SM.pdf
- Description:
- IC EEPROM 512KBIT I2C 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,578
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC515-I/SM from Microchip Technology Inc. is a 64K × 8 (512 Kbit) I²C-compatible serial EEPROM with industrial temperature range (–40°C to +85°C), 2.5V–5.5V supply, 400 kHz max clock, 64-byte page write buffer, and hardware write-protect pin. It serves as nonvolatile configuration/data storage in microcontroller-based systems requiring reliable byte- and page-level writes.
For engineers reviewing the 24LC515-I/SM datasheet, 24LC515-I/SM pinout, 24LC515-I/SM application, or 24LC515-I/SM equivalent, key selection considerations include its 2.5V minimum operating voltage, cascading support for up to four devices on one bus, Schmitt-trigger noise-immune inputs, self-timed 5 ms max write cycle, and SOIJ-8 package compatibility with space-constrained PCB layouts.
Technical Context
The 24LC515-I/SM implements a two-wire I²C interface with slave address decoding via A0/A1 pins and mandatory A2 tied to VCC. Its internal architecture includes a 64-byte page latch, HV generator for EEPROM programming, and dual 256 Kbit memory segments accessed via block-select bit B0.
It supports byte write, page write (up to 64 bytes within a physical page boundary), current-address read, random read, and sequential read across 0000h–7FFFh and 8000h–FFFFh address ranges. Write protection is controlled solely by the WP pin state at the Stop bit of each write command.
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 embedded controllers. |
| Supply voltage | 2.5V to 5.5V; compatible with standard 3.3V and 5V logic domains without level-shifting. |
| I²C clock rate | Up to 400 kHz (at VCC ≥ 2.5V); enables faster configuration loading than 100 kHz legacy EEPROMs while maintaining noise margin. |
| Page write buffer | 64 bytes; reduces write transaction overhead by up to 64× versus byte-write mode, improving system responsiveness during bulk updates. |
| Write endurance | 1 million erase/write cycles; ensures long-term reliability in applications with frequent parameter updates (e.g., energy metering, industrial sensors). |
| Data retention | Greater than 200 years at +25°C; guarantees data integrity over product lifetime without refresh mechanisms. |
| Standby current | Typical 100 nA; minimizes battery drain in always-on or low-power wake-up systems. |
Pinout & Package
24LC515-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 notch or dot; orientation follows standard SOIC conventions with pin 1 at top-left when marking is upright.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | User-configurable LSB of slave address; sets device ID when multiple 24LC515-I/SM units share I²C bus (A0/A1 define 4-device addressing). |
| A1 | Chip address input | User-configurable MSB of slave address; used with A0 to select one of four possible I²C addresses (1010xx0/1). |
| A2 | Non-configurable chip select | Must be hard-wired to VCC; device will not operate if left floating or pulled low - prevents accidental misconfiguration. |
| VSS | Ground reference | System ground return path; requires low-impedance connection to minimize noise coupling into I²C lines. |
| SDA | Serial data bidirectional line | Open-drain I²C data line; requires external pull-up resistor (2 kΩ typical for 400 kHz operation) to VCC. |
| SCL | Serial clock input | Master-generated clock signal; Schmitt-trigger input ensures robust timing under noisy conditions. |
| WP | Hardware write-protect input | Active-high protection: tied to VCC disables all writes (reads remain functional); sampled only at Stop bit of write commands. |
| VCC | Power supply | 2.5V–5.5V DC supply; decoupling capacitor (0.1 µF ceramic) required near pin for stable EEPROM operation. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt trigger inputs (SDA/SCL) | Input hysteresis ≥ 0.05 × VCC eliminates false triggering from EMI or slow-rising signals in noisy industrial environments. |
| Output slope control | Controlled SDA fall time (≤250 ns) suppresses ground bounce during high-speed transitions, reducing signal integrity risks. |
| Cascadable architecture | Four 24LC515-I/SM devices on one I²C bus provide up to 2 Mbit total EEPROM capacity without additional address decoding logic. |
| Page write time | Max 5 ms self-timed erase/write cycle per page; eliminates need for software delay loops and simplifies host firmware timing. |
| ESD protection | ≥4000 V HBM on all pins; meets industrial handling requirements and reduces susceptibility to field failures during assembly or service. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted thresholds in portable gas analyzers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 200-year data retention and 1M-cycle endurance for recalibration events. Use Value: Eliminates need for external backup power or supercapacitors; WP pin allows secure lock-down of calibrated values post-manufacturing. |
Use Scenario: Holding patient-specific therapy parameters and device serialization data in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Low-power (100 nA standby) EEPROM for infrequent but critical parameter updates during maintenance mode. Use Value: Enables compliance with IEC 62304 safety requirements through deterministic write timing (5 ms max) and hardware write protection. |
| Smart Energy Metering | Automotive Body Control Module |
|
Use Scenario: Recording tamper events, billing cycle data, and tariff schedules in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger with 1M write cycles and industrial temperature rating (–40°C to +85°C). Use Value: Supports 10+ year field deployment without data corruption; page write capability accelerates firmware update logging. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: I²C EEPROM interfacing directly with 3.3V automotive microcontrollers; SOIJ-8 footprint fits tight connector zones. Use Value: A0/A1 address pins allow co-location of multiple EEPROMs for independent subsystem storage without bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C512B-SSHL-T (Microchip) | Same 512 Kbit density, 1 MHz I²C clock, 1.7V–5.5V VCC, but uses different pinout (SOIC-8) and lacks A2 pin requirement. | Better suited for designs needing higher speed or lower voltage operation; incompatible pin-for-pin with 24LC515-I/SM due to SOIC vs SOIJ lead form. | Select if board layout allows SOIC-8 and system requires >400 kHz I²C throughput or sub-2.5V operation. |
| BR24G512FJ-WE2 (ROHM) | 512 Kbit, 400 kHz, 1.7V–5.5V, SOIJ-8 package, but uses different slave address scheme (1010xxx) and no dedicated A2 pin. | Compatible mechanical footprint; however, requires firmware modification to handle alternate address mapping and lacks hardware WP pin. | Choose for cost-sensitive industrial designs where WP functionality is implemented in software or external logic. |
Compared with AT24C512B-SSHL-T and BR24G512FJ-WE2, the 24LC515-I/SM uniquely mandates A2 = VCC for operation and offers deterministic 5 ms page write timing - critical for real-time systems where write latency must be bounded and predictable.
Availability
24LC515-I/SM is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, smart energy metering, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 24LC515-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 24LC515-I/SM belongs to Microchip's 24XX515 family of I²C serial EEPROMs, engineered for low-power, high-reliability nonvolatile storage in industrial, medical, and automotive systems where data integrity and long-term retention are essential.
FAQ
What is the minimum operating voltage for the 24LC515-I/SM?
The 24LC515-I/SM operates down to 2.5V - unlike the 24AA515 variant which supports 1.7V. This makes it suitable for 3.3V and 5V systems but not for ultra-low-voltage applications below 2.5V. The datasheet specifies that operation below 2.5V is not guaranteed, and clock frequency is limited to 100 kHz in such cases - though 24LC515-I/SM is not rated for sub-2.5V use.
Does the 24LC515-I/SM support cascading with other EEPROMs on the same I²C bus?
Yes, the 24LC515-I/SM supports cascading up to four devices on a single I²C bus using the A0 and A1 address pins to configure unique slave addresses (1010xx0/1). Each device must have distinct A0/A1 combinations, and A2 must be tied to VCC on all units. This enables up to 2 Mbit total EEPROM capacity without external address decoding logic.
What is the function of the A2 pin on the 24LC515-I/SM?
The A2 pin on the 24LC515-I/SM is a non-configurable chip select that must be hard-wired to VCC for the device to operate. Leaving A2 floating or pulling it low (VSS) will prevent initialization and communication. This design enforces intentional system-level enablement and avoids accidental activation in multi-device configurations.
How does hardware write protection work on the 24LC515-I/SM?
Hardware write protection on the 24LC515-I/SM is controlled by the WP pin: when tied to VCC, all write operations (byte and page) are inhibited while read operations remain fully functional. The WP state is sampled only at the Stop bit of each write command - toggling WP mid-cycle has no effect. This provides secure, pin-level lockdown of stored configuration data.
What is the maximum page write size and timing for the 24LC515-I/SM?
The 24LC515-I/SM supports a maximum page write size of 64 bytes within a single physical page boundary. Its self-timed write cycle completes in ≤5 ms, regardless of whether one byte or 64 bytes are written. Attempting to cross a page boundary (e.g., writing across 0x003F→0x0040) causes wraparound - application firmware must enforce page-aligned writes.
24LC515-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:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 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
24LC515-I/SM FAQ
1.How can I place an order for 24LC515-I/SM through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC515-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 24LC515-I/SM reliable?
The price and inventory of 24LC515-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 24LC515-I/SM is usually 5 days.
3.What payment methods are accepted for 24LC515-I/SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC515-I/SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC515-I/SM?
24LC515-I/SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC515-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 24LC515-I/SM?
For technical support, including 24LC515-I/SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC515-I/SM requirements.
6.How does Aetrix verify that 24LC515-I/SM is sourced from the original manufacturer or authorized distributors?
All 24LC515-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 24LC515-I/SM meets industry standards.
7.What is the process for return or replacement of 24LC515-I/SM?
All 24LC515-I/SM units undergo pre-shipment inspection (PSI). If there is an issue with 24LC515-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 24LC515-I/SM part is unused and in its original packaging.
Return procedure for 24LC515-I/SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC515-I/SM Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
