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Microchip Technology 24CS512T-I/Q4B
- Part No.:
- 24CS512T-I/Q4B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
24CS512T-I/Q4B.pdf
- Description:
- IC EEPROM 512KBIT I2C 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
24CS512T-I/Q4B from Microchip Technology Inc. is a 512-Kbit I²C serial EEPROM organized as 65,536 × 8-bit memory, featuring 3.4 MHz High-Speed mode support, built-in ECC logic for single-bit error correction, a factory-programmed 128-bit unique serial number, and dual write protection (hardware WP pin + software-configurable zone protection). It operates across 1.7V–5.5V and is used in industrial sensor calibration storage and embedded device identity management.
For engineers reviewing the 24CS512T-I/Q4B datasheet, 24CS512T-I/Q4B pinout, 24CS512T-I/Q4B application, or 24CS512T-I/Q4B equivalent, key selection considerations include I²C bus speed compatibility (up to 3.4 MHz), Security Register programmability, ECC status reporting via Configuration register, and voltage-flexible operation down to 1.7V for battery-powered systems.
Technical Context
The 24CS512T-I/Q4B implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and ground bounce. Its internal architecture separates the 512-Kbit main array from a 2-Kbit Security Register containing a read-only 128-bit serial number and a user-lockable 128-byte ID page.
Write protection is configurable via hardware (WP pin) or software (Configuration register), enabling per-zone locking of eight independent 64-Kbit blocks. The device includes a Power-on Reset circuit with 100 µs TPUP delay and supports Manufacturer ID command for system-level identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 × 8-bit), organized in 512 pages of 128 bytes each - enables efficient bulk writes without crossing page boundaries. |
| I²C Speed Support | Up to 3.4 MHz in High-Speed mode (2.5V–5.5V, Industrial temp) - reduces firmware update time in high-throughput embedded systems. |
| Write Cycle Time | ≤5 ms max self-timed byte/page write - eliminates need for external timing control during programming. |
| ECC Capability | Corrects up to one bit error per 4-byte read; ECC State bit (ECS) in Configuration register reports correction events - improves data integrity in noisy industrial environments. |
| Operating Voltage | 1.7V to 5.5V - supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters. |
| Data Retention | >200 years at 55°C - ensures long-term reliability in unattended equipment like smart meters and medical loggers. |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent parameter logging applications such as HVAC controller configuration storage. |
Pinout & Package
24CS512T-I/Q4B is packaged in an 8-lead UDFN (5 mm × 6 mm, 0.5 mm pitch) with exposed pad. Pin functions are electrically identical across all supported packages but physically mapped to specific pad locations in UDFN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardware-selectable LSB of 3-bit client address; sets I²C slave address (1010xxxR/W) - allows up to 8 devices on same bus. |
| A1 | Device Address Input | Hardware-selectable middle bit of client address - must be hardwired to VSS or VCC before communication. |
| A2 | Device Address Input | Hardware-selectable MSB of client address - determines unique I²C address when multiple 24CS512T-I/Q4B units share bus. |
| VSS | Ground Reference | System return path for all internal circuits; exposed pad may be connected to VSS for thermal/EMI improvement. |
| SDA | Open-Drain Serial Data | Bidirectional I²C data line requiring external pull-up; changes only during SCL low - compatible with standard I²C master implementations. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all transfers; Schmitt-trigger input rejects noise - supports robust operation in electrically noisy industrial settings. |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes to main array and Security Register - provides fail-safe protection during power-up or firmware faults. |
| VCC | Power Supply | 1.7V–5.5V supply input; internal POR circuit requires monotonic ramp <0.1 V/µs - ensures reliable initialization across wide voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed 128-bit Serial Number | Ensured unique identifier across entire CS series - eliminates manufacturing-line serialization overhead and enables secure device binding. |
| User-Programmable Lockable ID Page | 128-byte Security Register section that can be permanently locked via software sequence - ideal for storing immutable keys or calibration certificates. |
| Enhanced Software Write Protection | Configurable per-zone (eight 64-Kbit blocks) protection via Configuration register - enables fine-grained access control without hardware modifications. |
| I²C Manufacturer Identification Function | Returns unique 24-bit ID value on reserved host code command - allows runtime verification of device authenticity in multi-vendor BOMs. |
| ESD Robustness | >4000V HBM - withstands handling and board-level ESD events common in industrial assembly environments. |
Applications
| Industrial Sensor Calibration Storage | Secure Device Identity Management |
|---|---|
Use Scenario: Storing factory-calibrated coefficients and temperature compensation tables in industrial pressure transmitters operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Nonvolatile memory holding critical sensor metadata; accessed via I²C during power-up and periodic recalibration. Use Value: Built-in ECC ensures coefficient integrity over decades; 128-bit serial number enables traceability and anti-counterfeiting in certified instrumentation. | Use Scenario: Embedding immutable cryptographic keys and device-specific identifiers in medical IoT gateways for HIPAA-compliant data transmission. IC Role / Device Role / Timing Role: Secure identity anchor; stores lockable ID page with private key fragments and manufacturer-assigned serial number. Use Value: Hardware+software write protection prevents unauthorized key overwrite; Manufacturer ID command verifies genuine Microchip silicon in field-deployed units. |
| Smart Energy Meter Firmware Parameter Storage | Automotive Body Control Module Configuration |
Use Scenario: Retaining tariff schedules, metering constants, and tamper-event logs in utility-grade electricity meters with >200-year data retention requirement. IC Role / Device Role / Timing Role: High-reliability EEPROM supporting frequent parameter updates under constrained 1.7V–5.5V supply conditions. Use Value: 1M write cycles accommodate daily firmware patching; 5 ms write time minimizes bus occupancy during OTA updates. | Use Scenario: Holding vehicle-specific configuration data (e.g., mirror position presets, lighting profiles) in automotive BCMs qualified for -40°C to +125°C extended temperature range. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile memory interfaced to CAN-connected MCU via I²C; accessed during ignition-on initialization. Use Value: RoHS-compliant UDFN package meets space constraints; WP pin provides hardware-enforced protection against accidental reprogramming during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24CS512-SSHD-T | Same 512-Kbit capacity, 1.7V–5.5V, I²C up to 1 MHz; lacks built-in ECC and 128-bit serial number; uses different Security Register structure. | No factory-serialized ID or ECC reporting - unsuitable where data integrity auditing or device authentication is required. | Select if cost sensitivity outweighs need for ECC and unique serialization; verify software write protection implementation differs. |
| BR24G512FJ-3GE2 | 512-Kbit, 1.7V–5.5V, I²C up to 1 MHz; includes ECC but no preprogrammed serial number; offers smaller 8-pin TSSOP package. | Lacks 128-bit factory ID - cannot replace 24CS512T-I/Q4B in systems relying on hardware-based device binding. | Choose for space-constrained designs needing ECC but not serialized identity; confirm WP pin behavior matches legacy layout. |
Compared with AT24CS512-SSHD-T and BR24G512FJ-3GE2, the 24CS512T-I/Q4B uniquely combines factory-serialized identity, per-zone software write protection, and real-time ECC status reporting - making it the only option for applications demanding both traceability and field-upgradeable security-critical data.
Availability
24CS512T-I/Q4B is available at Aetrix Electronics and suitable for industrial sensor calibration storage, secure device identity management, and smart energy meter firmware parameter storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24CS512T-I/Q4B 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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24CS512T-I/Q4B belongs to Microchip's CS-series Serial EEPROM family, designed specifically for industrial and automotive applications requiring enhanced reliability, embedded security features, and wide-voltage I²C interoperability.
FAQ
What is the maximum I²C clock frequency supported by the 24CS512T-I/Q4B?
The 24CS512T-I/Q4B supports up to 3.4 MHz in High-Speed mode when operated at 2.5V–5.5V and within the Industrial temperature range (-40°C to +85°C). At lower voltages (1.7V–2.5V), the maximum clock frequency is limited to 1 MHz. This dual-speed capability allows designers to optimize bus throughput while maintaining compatibility with legacy 100 kHz or 400 kHz systems.
Does the 24CS512T-I/Q4B include error correction, and how is it reported?
Yes, the 24CS512T-I/Q4B incorporates built-in Error Correction Code (ECC) logic that corrects up to one bit error per four-byte read. The Configuration register includes a dedicated read-only ECC State (ECS) bit that is set whenever ECC correction is invoked - enabling firmware to detect and log potential memory degradation events in real time.
How is the 128-bit serial number implemented in the 24CS512T-I/Q4B?
The 24CS512T-I/Q4B contains a factory-programmed, ensured unique 128-bit serial number stored in the first 16 bytes of its Security Register (address range 0800h–080Fh). This serial number is guaranteed unique across the entire Microchip CS-series EEPROM family and is read-only - it cannot be altered or erased, providing a hardware-rooted identity for device authentication and traceability.
Can the 24CS512T-I/Q4B be used with a 1.8V microcontroller without level shifting?
Yes, the 24CS512T-I/Q4B operates from 1.7V to 5.5V and specifies VIH = VCC × 0.7 and VIL = VCC × 0.3, making it fully compatible with 1.8V I²C masters. Its Schmitt-trigger inputs and slope-controlled outputs ensure noise immunity and clean signal transitions at low voltage, eliminating the need for external level-shifting circuitry in 1.8V systems.
What write protection mechanisms does the 24CS512T-I/Q4B offer?
The 24CS512T-I/Q4B provides dual-layer write protection: (1) hardware-based via the WP pin (active-high, disables all writes when tied to VCC), and (2) software-configurable via the Configuration register, which enables independent locking of eight 64-Kbit zones. Once configured, the Configuration register itself can be permanently locked to prevent further changes - delivering flexible yet tamper-resistant data governance.
24CS512T-I/Q4B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- 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:
- 3.4 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 400 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
24CS512T-I/Q4B FAQ
1.How can I place an order for 24CS512T-I/Q4B through Aetrix?
Please submit a Request for Quotation (RFQ) for 24CS512T-I/Q4B 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 24CS512T-I/Q4B reliable?
The price and inventory of 24CS512T-I/Q4B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24CS512T-I/Q4B is usually 5 days.
3.What payment methods are accepted for 24CS512T-I/Q4B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24CS512T-I/Q4B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24CS512T-I/Q4B?
24CS512T-I/Q4B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24CS512T-I/Q4B 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 24CS512T-I/Q4B?
For technical support, including 24CS512T-I/Q4B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24CS512T-I/Q4B requirements.
6.How does Aetrix verify that 24CS512T-I/Q4B is sourced from the original manufacturer or authorized distributors?
All 24CS512T-I/Q4B 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 24CS512T-I/Q4B meets industry standards.
7.What is the process for return or replacement of 24CS512T-I/Q4B?
All 24CS512T-I/Q4B units undergo pre-shipment inspection (PSI). If there is an issue with 24CS512T-I/Q4B, 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 24CS512T-I/Q4B part is unused and in its original packaging.
Return procedure for 24CS512T-I/Q4B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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