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STMicroelectronics M24C32-RDW6TP
- Part No.:
- M24C32-RDW6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M24C32-RDW6TP.pdf
- Description:
- IC EEPROM 32KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,622
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Product details
Overview
M24C32-RDW6TP from STMicroelectronics is a 32-Kbit I²C-compatible EEPROM organized as 4 K × 8 bits, operating from 1.7 V to 5.5 V over –40 °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-RDW6TP datasheet, M24C32-RDW6TP pinout, M24C32-RDW6TP application, or M24C32-RDW6TP equivalent, key selection criteria include supply voltage range (1.7–5.5 V), I²C speed compatibility (up to 1 MHz), page size (32 bytes), write cycle time (≤5 ms), and hardware write control (WC pin) for memory array protection.
Technical Context
The M24C32-RDW6TP implements a standard I²C target interface with open-drain SDA and input-only SCL, requiring external pull-up resistors. Chip enable is configured via E2/E1/E0 pins (hardwired low in this variant), enabling up to eight devices on one bus using unique 3-bit address codes. The device includes an internal power-on reset (POR) circuit that prevents spurious writes during power ramp-up.
It supports byte write, page write (max 32 bytes per cycle), random read, current address read, and sequential read modes. Write control (WC) disables all memory writes when high; when low or floating, writes are enabled. For M24C32-DF variants only, an additional 32-byte identification page with permanent lock capability is available - not present in M24C32-RDW6TP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4 K × 8 bits) - sufficient for firmware parameter tables, calibration coefficients, or device ID storage in compact embedded systems. |
| I²C speed support | Up to 1 MHz (fast mode plus) - enables high-throughput configuration updates without CPU intervention in real-time control loops. |
| Page size | 32 bytes - matches typical microcontroller cache line sizes and simplifies firmware-aligned write buffering. |
| Write cycle time | ≤5 ms (byte or page) - allows deterministic timing budgeting for non-blocking polling or timeout-based status checks. |
| Supply voltage range | 1.7 V to 5.5 V - interoperable with 1.8 V logic, 3.3 V MCU peripherals, and 5 V legacy systems without level shifting. |
| Data retention | >200 years at +25 °C - ensures long-term reliability for unattended infrastructure monitoring nodes. |
| Endurance | >4 million write cycles - supports daily reconfiguration over 10+ years in field-deployed edge devices. |
Pinout & Package
Package: UFDFPN5 (MH), DFN5 1.7 × 1.4 mm, ECOPACK2-compliant, unsawn wafer tested. Pinout conforms to Figure 3 of DS0952 Rev 33: SDA (1), SCL (2), WC (3), VSS (4), VCC (5). E2/E1/E0 pins are unconnected and internally read as logic low (000).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA (Pin 1) | Serial Data I/O | Open-drain bidirectional bus line - requires external pull-up; shares bus with other I²C targets; supports ACK/NACK handshake. |
| SCL (Pin 2) | Serial Clock Input | Master-generated clock synchronizing all data transfers; no internal clock generation; tolerant of clock stretching by slaves. |
| WC (Pin 3) | Write Control Input | Active-high hardware lock - when high, blocks all write operations including byte/page/identification page writes; enables fail-safe configuration storage. |
| VSS (Pin 4) | Ground Reference | Primary return path for VCC current; must be low-impedance and decoupled near package; shared with MCU ground plane. |
| VCC (Pin 5) | Supply Voltage | Power input (1.7–5.5 V); requires local 10–100 nF ceramic decoupling capacitor between VCC and VSS pins. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection | WC pin disables entire memory array writes - eliminates need for software-level access control in safety-critical boot configuration storage. |
| Wide VCC operating range | 1.7–5.5 V operation across full temperature range - enables direct interfacing with diverse host platforms (e.g., 1.8 V FPGA I/O banks or 5 V PLC backplanes). |
| Fast mode plus support | 1 MHz I²C clock tolerance - reduces configuration latency in time-sensitive applications like motor startup parameter loading. |
| Enhanced reliability | >4M write cycles and >200-year data retention - validated under JEDEC A117 conditions; suitable for infrequently updated but mission-critical settings. |
| ECOPACK2 packaging | Halogen-free, RoHS-compliant UFDFPN5 - meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for standard SMT assembly. |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-up via I²C; WC pin held high after initial programming to prevent runtime corruption. Use Value: Eliminates recalibration during field maintenance; leverages 1.7 V minimum VCC to operate alongside low-voltage signal chains. | Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, display resolution, network MAC address) in medical diagnostic handhelds. IC Role / Device Role / Timing Role: I²C-configurable memory mapped into MCU's peripheral initialization sequence; accessed during cold start before RTOS launch. Use Value: Enables field-upgradable settings without firmware reflashing; 32-byte page writes align with typical config block sizes. |
| Smart Meter Firmware Parameters | Automotive Body Control Module |
Use Scenario: Retaining tariff schedules, pulse constants, and tamper-event logs in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, long-life storage element interfaced to metering SoC; WC pin tied to secure MCU GPIO to enforce write lockdown post-certification. Use Value: Meets 200-year data retention requirement for utility infrastructure; operates reliably across –25 °C to +70 °C ambient. | Use Scenario: Saving seat position memory, mirror presets, and lighting profiles in automotive door modules compliant with AEC-Q200 Grade 2. IC Role / Device Role / Timing Role: I²C slave storing user preferences; accessed during ignition-on sequence; powered from vehicle's 12 V rail via local LDO. Use Value: Supports 1.7–5.5 V operation to tolerate battery droop during cranking; >4M endurance handles daily user adjustments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | Same 32-Kbit capacity, 1.7–5.5 V, but supports only up to 400 kHz I²C; no WC pin - write protection relies on software address locking. | Lacks hardware-level write disable; less suitable for safety-critical calibration storage where accidental overwrite must be physically prevented. | Select when cost sensitivity outweighs need for hardware write lock and 1 MHz speed. |
| BR24G32FJ-3GE2 | 32-Kbit, 1.6–5.5 V, supports 1 MHz I²C, includes WC pin, but uses SOP-8 package (larger footprint) and has lower endurance (1M cycles). | Requires PCB redesign for SO8N footprint; shorter lifetime limits use in high-write-frequency logging applications. | Choose when existing SO8N layout reuse is prioritized over miniaturization and extended endurance. |
Compared with AT24C32D-SSHM-T and BR24G32FJ-3GE2, M24C32-RDW6TP uniquely combines 1 MHz I²C, hardware WC pin, 5 ms write time, and 4M-cycle endurance in a 1.7×1.4 mm DFN5 package - making it optimal for space-constrained, high-reliability industrial and automotive configurations.
Availability
M24C32-RDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, smart meter firmware parameters, and automotive body control module applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for M24C32-RDW6TP 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, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.
The M24Cxx series targets robust, low-power serial EEPROM applications in harsh environments - engineered for wide voltage operation, high endurance, and seamless integration with microcontroller I²C peripherals.
FAQ
What is the function of the WC pin on M24C32-RDW6TP?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. When low or left floating, writes are enabled. This provides physical-level protection against accidental overwrites - critical for stored calibration data or security keys. Unlike software locks, WC remains effective even if firmware crashes or is compromised.
Does M24C32-RDW6TP support the identification page feature?
No. The identification page (32-byte dedicated area with permanent lock capability) is exclusive to M24C32-DF variants. M24C32-RDW6TP is an M24C32-R grade part and contains only the main 4 K × 8-bit memory array. Its device select code is 1010b (not 1011b), confirming absence of identification page functionality.
Can M24C32-RDW6TP operate at 1.6 V?
No. M24C32-RDW6TP guarantees operation from 1.7 V to 5.5 V across –40 °C to +85 °C. The 1.6 V minimum applies only to the M24C32-X variant under limited temperature range (–20 °C to +85 °C). At 1.6 V, M24C32-RDW6TP may fail to meet AC timing specs or exhibit unreliable write completion.
What package type is used for M24C32-RDW6TP, and how are E2/E1/E0 handled?
M24C32-RDW6TP uses the UFDFPN5 (MH) package - a 5-pin DFN measuring 1.7 × 1.4 mm. Pins E2, E1, and E0 are unconnected (not bonded out) and internally read as logic low (000), fixing the device address to 1010000b (0xA0) for write and 1010001b (0xA1) for read. No external pull-up/down resistors are needed for these pins.
M24C32-RDW6TP 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
M24C32-RDW6TP FAQ
1.How can I place an order for M24C32-RDW6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C32-RDW6TP 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-RDW6TP reliable?
The price and inventory of M24C32-RDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C32-RDW6TP is usually 5 days.
3.What payment methods are accepted for M24C32-RDW6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C32-RDW6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C32-RDW6TP?
M24C32-RDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C32-RDW6TP 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-RDW6TP?
For technical support, including M24C32-RDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C32-RDW6TP requirements.
6.How does Aetrix verify that M24C32-RDW6TP is sourced from the original manufacturer or authorized distributors?
All M24C32-RDW6TP 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-RDW6TP meets industry standards.
7.What is the process for return or replacement of M24C32-RDW6TP?
All M24C32-RDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24C32-RDW6TP, 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-RDW6TP part is unused and in its original packaging.
Return procedure for M24C32-RDW6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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