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Microchip Technology 24CS512T-E/Q4B
- Part No.:
- 24CS512T-E/Q4B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
24CS512T-E/Q4B.pdf
- Description:
- IC EEPROM 512KBIT I2C 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,796
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Product details
Overview
24CS512T-E/Q4B from Microchip Technology Inc. is a 512-Kbit I²C serial EEPROM with integrated security register, ECC logic, and high-speed 3.4 MHz interface. It operates from 1.7V to 5.5V, supports up to eight devices on one bus, and delivers >1 million write cycles with >200-year data retention-used in industrial sensor calibration, medical device configuration, and automotive infotainment firmware storage.
For engineers reviewing the 24CS512T-E/Q4B datasheet, 24CS512T-E/Q4B pinout, 24CS512T-E/Q4B application, or 24CS512T-E/Q4B equivalent, key selection considerations include its 8-pin UDFN package with A0–A2 address inputs, hardware/software write protection flexibility, factory-programmed 128-bit serial number, and dual-mode I²C timing (100 kHz to 3.4 MHz).
Technical Context
The 24CS512T-E/Q4B implements a two-wire I²C interface with High-Speed mode support (3.4 MHz at VCC ≥2.5V), Schmitt-trigger inputs for noise immunity, and output slope control to suppress ground bounce. Its memory is organized as one contiguous 65,536 × 8-bit block, enabling byte- or page-write operations up to 128 bytes per cycle.
It integrates three dedicated register spaces: a 2-Kbit Security register (128-bit read-only serial number + 128-byte user-lockable ID page), a Configuration register for zone-level software write protection, and a 24-bit Manufacturer ID register compliant with I²C standard identification protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 × 8-bit), organized as single block for simplified addressing |
| I²C Speed | Up to 3.4 MHz in High-Speed mode; backward-compatible with 100 kHz/400 kHz/1 MHz standards |
| Write Cycle Time | ≤5 ms max self-timed byte/page write-no external delay required in host firmware |
| Operating Voltage | 1.7V to 5.5V-supports direct interfacing with 1.8V, 3.3V, and 5V microcontrollers |
| Data Retention | >200 years at 55°C-enables long-life deployment in sealed industrial equipment |
| Write Endurance | 1,000,000 cycles-guaranteed across all 4-byte aligned boundaries per qualification |
| ECC Capability | Corrects up to one bit error per 4-byte read; ECC Status bit reports correction events via Configuration register |
Pinout & Package
24CS512T-E/Q4B is packaged in an 8-pad UDFN (Ultra Thin Dual Flat No-lead) with exposed pad, rated for Extended temperature range (–40°C to +125°C). Pin 1 is A0; pin 8 is VCC. The exposed pad may be connected to VSS or left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Hardware Device Address Input | LSB of 3-bit client address; sets unique I²C address when combined with A1/A2 (000–111) |
| A1 | Hardware Device Address Input | Middle bit of 3-bit client address; enables up to eight 24CS512T-E/Q4B devices on same I²C bus |
| A2 | Hardware Device Address Input | MSB of 3-bit client address; must be hardwired to VSS or VCC-no floating allowed |
| VSS | Ground Reference | Primary return path for all internal circuits; exposed pad may be tied here for thermal/mechanical stability |
| SDA | Bidirectional Serial Data Line | Open-drain I²C data line requiring external pull-up; changes only during SCL low for valid data transfer |
| SCL | Serial Clock Input | Master-generated clock synchronizing all reads/writes; rise/fall times constrained to meet 3.4 MHz timing |
| WP | Hardware Write-Protect Control | Active-high pin disabling all writes to main array and Security register when driven to VCC |
| VCC | Power Supply Input | Supplies core logic and EEPROM programming voltage; requires stable 1.7–5.5V with ≤0.1 V/µs slew rate |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed 128-Bit Serial Number | Ensures globally unique device identity across CS-series EEPROMs-eliminates line-side serialization overhead |
| User-Programmable Lockable ID Page | 128-byte Security register section that can be permanently locked via software sequence to prevent tampering |
| Enhanced Software Write Protection | Configurable per-zone (eight 64-Kbit segments) protection-enables selective firmware partitioning without hardware changes |
| Built-in ECC Logic | Real-time single-bit error correction with status reporting-reduces uncorrectable read failures in harsh EMI environments |
| I²C Manufacturer ID Function | Returns unique 24-bit identifier on command-enables automatic device identification and firmware version matching |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing calibrated offset/gain coefficients for pressure, temperature, and flow sensors in factory-set modules. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed >200-year retention and ECC-protected reads during power-cycling. Use Value: Eliminates recalibration drift over product lifetime and ensures traceable, immutable calibration records. | Use Scenario: Holding patient-specific therapy settings, device serial history, and regulatory compliance flags in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, lockable configuration storage supporting FDA 21 CFR Part 11 audit trails via preprogrammed serial number and write-protected ID page. Use Value: Meets medical-grade data integrity requirements with hardware-enforced write protection and tamper-evident identity. |
| Automotive Infotainment Firmware | Smart Meter Parameter Storage |
Use Scenario: Storing UI language packs, radio presets, and Bluetooth pairing keys in head units operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Extended-temperature EEPROM with 3.4 MHz I²C interface for fast boot-time parameter loading. Use Value: Enables rapid system initialization and reliable operation under under-hood thermal stress without derating. | Use Scenario: Retaining tariff schedules, metering logs, and cryptographic keys in utility smart meters deployed for 15+ years. IC Role / Device Role / Timing Role: High-endurance, ECC-protected nonvolatile memory supporting >1M write cycles and >200-year data retention. Use Value: Reduces field failure rates due to memory corruption and extends product service life beyond mechanical wear-out. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24CS512-MAHM-T | Same 512-Kbit capacity and I²C interface; lacks built-in ECC and 128-bit serial number; uses different security register architecture | No factory-serialized identity or ECC correction-requires external validation logic for safety-critical use | Select when cost sensitivity outweighs need for embedded security features and ECC reliability |
| BR24G512FJ-3GE2 | 512-Kbit I²C EEPROM with 1.7–5.5V operation; includes write-protect pin but no security register or manufacturer ID function | Supports basic parameter storage but cannot provide device-level authentication or zone-level software protection | Choose for legacy designs where full 24CS512T-E/Q4B feature set is unused and footprint compatibility is confirmed |
Compared with AT24CS512-MAHM-T and BR24G512FJ-3GE2, the 24CS512T-E/Q4B uniquely combines factory-serialized identity, ECC-based reliability, and configurable software write protection-making it optimal for applications demanding traceability, long-term data integrity, and flexible security partitioning without added components.
Availability
24CS512T-E/Q4B is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive infotainment firmware storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24CS512T-E/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-E/Q4B belongs to Microchip's CS-series serial EEPROM family, engineered specifically for high-reliability, security-aware embedded systems where data integrity, device identity, and extended-temperature operation are critical design requirements.
FAQ
What is the maximum I²C clock frequency supported by the 24CS512T-E/Q4B?
The 24CS512T-E/Q4B supports up to 3.4 MHz in High-Speed mode when VCC is ≥2.5V and ambient temperature is within the Industrial range (–40°C to +85°C). At lower voltages or in Extended temperature range (–40°C to +125°C), the maximum clock frequency is 1 MHz. This dual-speed capability allows seamless integration into both legacy and high-performance I²C systems without protocol translation.
How does the 24CS512T-E/Q4B implement write protection?
The 24CS512T-E/Q4B offers dual-layer write protection: hardware-based via the WP pin (disabling all writes when pulled high), and software-configurable via the Configuration register. The latter enables independent protection of eight 64-Kbit zones-allowing selective locking of firmware partitions while leaving calibration data writable. Once locked, the Configuration register prevents further modification of protection settings.
What is the purpose of the 128-bit serial number in the 24CS512T-E/Q4B Security register?
The 128-bit serial number in the 24CS512T-E/Q4B is factory-programmed, globally unique across all CS-series EEPROMs, and read-only. It serves as a hardware root-of-trust for device authentication, secure boot verification, and manufacturing traceability-eliminating the need for external serialization during production and enabling zero-touch provisioning in IoT deployments.
Does the 24CS512T-E/Q4B require external components for I²C bus operation?
Yes-the 24CS512T-E/Q4B requires external pull-up resistors on both SDA and SCL lines. Recommended values are 330 Ω for 3.4 MHz operation, 2 kΩ for 1 MHz, and 10 kΩ for 100 kHz. No additional passive or active components are needed for basic read/write functionality, though decoupling capacitors near VCC are strongly advised for noise immunity in noisy environments.
What is the endurance specification for the 24CS512T-E/Q4B EEPROM array?
The 24CS512T-E/Q4B guarantees 1,000,000 erase/write cycles per memory location, validated across the full 1.7V–5.5V operating voltage range and –40°C to +125°C temperature range. This endurance applies to 4-byte aligned boundaries (e.g., addresses 0x0000, 0x0004, etc.), reflecting the underlying memory architecture's wear-leveling behavior and ensuring predictable lifetime in high-write-rate applications like logging or telemetry buffers.
24CS512T-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
24CS512T-E/Q4B FAQ
1.How can I place an order for 24CS512T-E/Q4B through Aetrix?
Please submit a Request for Quotation (RFQ) for 24CS512T-E/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-E/Q4B reliable?
The price and inventory of 24CS512T-E/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-E/Q4B is usually 5 days.
3.What payment methods are accepted for 24CS512T-E/Q4B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24CS512T-E/Q4B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24CS512T-E/Q4B?
24CS512T-E/Q4B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24CS512T-E/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-E/Q4B?
For technical support, including 24CS512T-E/Q4B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24CS512T-E/Q4B requirements.
6.How does Aetrix verify that 24CS512T-E/Q4B is sourced from the original manufacturer or authorized distributors?
All 24CS512T-E/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-E/Q4B meets industry standards.
7.What is the process for return or replacement of 24CS512T-E/Q4B?
All 24CS512T-E/Q4B units undergo pre-shipment inspection (PSI). If there is an issue with 24CS512T-E/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-E/Q4B part is unused and in its original packaging.
Return procedure for 24CS512T-E/Q4B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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