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STMicroelectronics M24C32-XDW5TP
- Part No.:
- M24C32-XDW5TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M24C32-XDW5TP.pdf
- Description:
- IC EEPROM 32KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
M24C32-XDW5TP from STMicroelectronics is a 32-Kbit I²C-compatible EEPROM organized as 4 K × 8 bits, operating from 1.6 V to 5.5 V over -20 °C to +85 °C. It supports 1 MHz (fast mode plus), 400 kHz (fast mode), and 100 kHz (standard mode) I²C bus speeds, features 32-byte page write, hardware write protection via WC pin, and delivers >4 million write cycles with >200-year data retention - deployed in industrial sensor calibration storage and embedded system configuration memory.
For engineers reviewing the M24C32-XDW5TP datasheet, M24C32-XDW5TP pinout, M24C32-XDW5TP application, or M24C32-XDW5TP equivalent, key selection criteria include its 1.6 V minimum supply voltage, UFDFPN5 (1.7 × 1.4 mm) package footprint, WC-controlled full-array write protection, and compatibility with I²C fast mode plus timing for high-throughput parameter logging in space-constrained designs.
Technical Context
The M24C32-XDW5TP implements a standard I²C target protocol with 7-bit device addressing, supporting random and sequential read modes, byte/page write, and hardware-based write inhibition via the WC input. Its internal address counter auto-increments after each read/write operation, enabling seamless sequential access across 4096 bytes.
Chip enable inputs E2–E0 are unconnected in the UFDFPN5 package and internally decoded as logic 000, fixing the device select code to 1010xxx0/1. The device includes a power-on reset (POR) circuit that prevents spurious writes during VCC ramp-up and enforces standby mode until VCC stabilizes within 1.6–5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4 K × 8 bits) - provides sufficient nonvolatile storage for firmware parameters, calibration coefficients, or device ID in compact embedded systems. |
| I²C speed support | Up to 1 MHz (fast mode plus) - enables rapid configuration updates in real-time control loops without bus contention bottlenecks. |
| Supply voltage range | 1.6 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level-shifting. |
| Write cycle time | ≤5 ms (byte/page) - ensures deterministic latency for critical state-save operations in safety-monitored applications. |
| Data retention | >200 years at +25 °C - guarantees long-term integrity of stored calibration data across product lifetime without refresh. |
| Endurance | >4 million write cycles - accommodates frequent field-updatable settings in IoT edge nodes and industrial HMI. |
| Operating temperature | -20 °C to +85 °C - validated for use in commercial and extended-temperature industrial enclosures, excluding automotive under-hood. |
Pinout & Package
Package: UFDFPN5 (1.7 mm × 1.4 mm, 0.5 mm pitch, ECOPACK2-compliant). This ultra-compact 5-pin DFN exposes only essential I²C and control signals - optimized for high-density PCB layouts in wearables, medical patches, and miniaturized sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SDA | Serial Data I/O | Open-drain bidirectional bus line - requires external pull-up resistor; shares bus with other I²C targets; supports wired-AND arbitration. |
| 2: SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; rising edge samples SDA, falling edge drives SDA; defines maximum 1 MHz timing budget. |
| 3: WC | Write Control Input | Active-high hardware lock - disables all write operations (including page/byte/ID page) when pulled high; floating = write enabled. |
| 4: VCC | Supply Voltage | 1.6–5.5 V DC input - must be decoupled with 10–100 nF capacitor near pin; powers internal EEPROM array and I²C interface logic. |
| 5: VSS | Ground Reference | Return path for VCC and all I/O signals - must be low-impedance connection to minimize noise coupling into sensitive read operations. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection | WC pin disables entire memory array writes - eliminates need for software-level lock bits or command sequences, reducing firmware complexity and attack surface. |
| Page write capability | 32-byte atomic writes - reduces I²C transaction count by up to 32× vs. byte-write for bulk parameter updates, improving bus efficiency and system responsiveness. |
| Enhanced reliability | >4M write cycles + >200-year retention - enables decade-long deployment in unattended remote sensors without maintenance or data loss risk. |
| Low-voltage operation | 1.6 V minimum VCC - allows direct integration with energy-harvesting power supplies and single-cell Li-ion/LiFePO₄ systems without regulators. |
| ESD/latch-up robustness | Qualified per AEC-Q200 Class 2 (HBM ≥4 kV) - withstands handling and board assembly stresses, improving first-pass yield in high-volume manufacturing. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in pressure, humidity, and gas sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-up and during field recalibration; retains values across cold resets and battery removal. Use Value: Eliminates need for external calibration dongles or cloud-based lookup; enables plug-and-play sensor replacement with guaranteed accuracy traceability. |
Use Scenario: Holding user-configurable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps and nebulizers. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration vault - WC pin prevents accidental overwrite during firmware updates or diagnostic mode entry. Use Value: Ensures patient-safety-critical settings persist through battery swaps and brownouts, meeting IEC 62304 Class B software requirements. |
| Smart Meter Firmware Settings | Wearable Health Monitor Logs |
|
Use Scenario: Recording utility-specific tariff schedules, meter serial numbers, and cryptographic keys in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Trusted boot-time configuration source - verified before secure bootloader execution; supports AES key wrapping with stored IVs. Use Value: Enables field-upgradable billing logic without exposing keys to host MCU memory; meets ANSI C12.22 security annex requirements. |
Use Scenario: Logging heart rate variability (HRV) metadata, sensor fusion coefficients, and user profile preferences in Bluetooth-enabled fitness bands. IC Role / Device Role / Timing Role: Low-power background storage - accessed only during sync intervals; operates reliably at 1.8 V from coin-cell supply. Use Value: Extends battery life by avoiding SRAM retention during sleep; maintains longitudinal health data continuity across firmware upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | Same 32 Kbit capacity, but 1.7–5.5 V supply range and -40 °C to +85 °C rating; no WC pin - write protection relies on software lock bits. | Lacks hardware write inhibit; requires firmware coordination to prevent concurrent writes during interrupts or resets. | Select when full industrial temp range is required and software-controlled protection suffices. |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM with 1.6–5.5 V operation and -40 °C to +105 °C rating; includes built-in error correction (ECC) and 100-year retention at +105 °C. | Higher temperature grade and ECC support suit automotive cabin modules and industrial PLC backplanes. | Select when extended temperature operation or bit-error resilience is mandatory beyond basic parameter storage. |
Compared with AT24C32D-SSHM-T and BR24G32FJ-3GE2, the M24C32-XDW5TP uniquely balances ultra-low 1.6 V operation with hardware write protection in a 1.7 × 1.4 mm footprint - making it optimal for cost-sensitive, space-constrained consumer and medical devices where -20 °C minimum ambient is sufficient.
Availability
M24C32-XDW5TP is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart meter firmware settings requiring stable component supply, consistent ECOPACK2 compliance, and guaranteed long-term availability through 2030.
Supply support for M24C32-XDW5TP 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, MEMS, and nonvolatile memory for industrial, automotive, and consumer markets.
The M24C32 series belongs to ST's serial EEPROM product line, engineered specifically for reliable, low-power, I²C-based configuration and calibration storage in resource-constrained embedded systems.
FAQ
Does M24C32-XDW5TP support I²C fast mode plus (1 MHz) operation?
Yes, the M24C32-XDW5TP fully supports I²C fast mode plus at up to 1 MHz, as confirmed in ST's DS0952 Rev 33 datasheet Section 8.2 (AC characteristics). It meets timing requirements for tBUF, tHD:STA, and tLOW(min) at 1 MHz with standard 4.7 kΩ pull-ups and ≤200 pF bus capacitance.
What is the function of the WC pin, and how should it be connected?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. To enable writes, connect WC to VSS or leave it floating; to permanently protect stored data, tie WC to VCC. No external pull-up/down is required - internal weak pull-down ensures safe default state.
Is the identification page feature available on M24C32-XDW5TP?
No - the identification page (and related lock functionality) is exclusive to the M24C32-DF variant, as explicitly stated in Section 1 of DS0952. The M24C32-XDW5TP is based on the M24C32-X die, which lacks the additional 32-byte ID page and associated command set.
Can M24C32-XDW5TP operate at 1.6 V while maintaining full -40 °C to +85 °C temperature range?
No - the M24C32-X variant (including DW5TP) is specified for 1.6–5.5 V operation only over -20 °C to +85 °C. For full -40 °C support at low voltage, ST recommends the M24C32-F or M24C32-DF variants, which guarantee 1.7–5.5 V operation across -40 °C to +85 °C.
M24C32-XDW5TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.6V ~ 5.5V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
M24C32-XDW5TP FAQ
1.How can I place an order for M24C32-XDW5TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C32-XDW5TP 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 M24C32-XDW5TP reliable?
The price and inventory of M24C32-XDW5TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C32-XDW5TP is usually 5 days.
3.What payment methods are accepted for M24C32-XDW5TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C32-XDW5TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C32-XDW5TP?
M24C32-XDW5TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C32-XDW5TP 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 M24C32-XDW5TP?
For technical support, including M24C32-XDW5TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C32-XDW5TP requirements.
6.How does Aetrix verify that M24C32-XDW5TP is sourced from the original manufacturer or authorized distributors?
All M24C32-XDW5TP 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 M24C32-XDW5TP meets industry standards.
7.What is the process for return or replacement of M24C32-XDW5TP?
All M24C32-XDW5TP units undergo pre-shipment inspection (PSI). If there is an issue with M24C32-XDW5TP, 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 M24C32-XDW5TP part is unused and in its original packaging.
Return procedure for M24C32-XDW5TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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