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Renesas RM24C32C-BTAC-B
- Part No.:
- RM24C32C-BTAC-B
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
RM24C32C-BTAC-B.pdf
- Description:
- IC CBRAM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
RM24C32C-BTAC-B from Adesto Technologies is a 32Kbit CBRAM®-based non-volatile serial memory IC with I²C interface, operating from 2.7V to 3.6V, supporting 100kHz/400kHz bus speeds, 32-byte page write, and 5μA standby current. It serves as an EEPROM-compatible replacement in embedded control, sensor calibration storage, and power-constrained IoT node firmware parameter retention.
For engineers reviewing the RM24C32C-BTAC-B datasheet, RM24C32C-BTAC-B pinout, RM24C32C-BTAC-B application, or RM24C32C-BTAC-B equivalent, key selection criteria include its 25,000-cycle endurance, 10-year data retention, low-energy byte write (60nJ), 8-lead TSSOP package, and WP-enabled hardware write protection.
Technical Context
This device implements a slave-only I²C interface with SDA/SCL pins, three external address bits (E0–E2) enabling up to eight devices on one bus, and a dedicated WP pin that disables writes when pulled high. Its CBRAM® technology enables direct-write operation without erase cycles.
It supports three read modes-Current Address, Random, and Sequential-with full-memory sequential reads possible in one transaction. Internal address pointer auto-increment wraps within pages during byte/page writes, and acknowledge polling is used to detect write completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 32Kbit (4KB), sufficient for firmware configuration tables or sensor calibration coefficients |
| Interface | I²C 2-wire, compatible with standard 100kHz/400kHz modes-no custom controller required |
| Page size | 32 bytes; enables efficient bulk updates without multiple transactions |
| Write energy | 60nJ per byte-reduces average power in battery-operated nodes during config saves |
| Endurance | 25,000 write cycles-supports frequent field-updatable parameters in industrial controllers |
| Data retention | 10 years at 70°C-meets long-life requirements for sealed medical or automotive modules |
| Supply range | 2.7V–3.6V-compatible with single-cell Li-ion or 3.3V logic rails without level shifting |
Pinout & Package
RM24C32C-BTAC-B uses an 8-lead TSSOP (TA) package measuring 3.0mm × 4.4mm, optimized for space-constrained PCBs in portable electronics and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0 | LSB device address enable | One of three hardware-selectable address bits; sets device ID on shared I²C bus |
| E1 | MSB-1 device address enable | Enables up to eight identical RM24C32C-BTAC-B devices on same SDA/SCL lines |
| E2 | MSB device address enable | Combines with E0/E1 to form 3-bit chip select; no external address decoding logic needed |
| GND | Reference ground | Common return path for VCC, SDA, SCL, and WP; must be low-impedance |
| SDA | Bidirectional I²C data | Open-drain; requires external pull-up (2kΩ for 400kHz); carries addresses, commands, and data |
| SCL | I²C clock input | Slave-only clock input; synchronizes all read/write transfers; no output capability |
| WP | Hardware write protect | Pull high to disable all writes (read-only mode); sampled only at STOP command |
| VCC | Power supply | 2.7V–3.6V input; powers internal CBRAM array and I²C interface logic |
Key Features
| Feature | Design Value |
|---|---|
| CBRAM® resistive memory | Eliminates pre-erase requirement-enables true byte-write without latency penalty |
| Low-energy byte write | 60nJ per write reduces cumulative energy use by >90% vs. legacy EEPROMs |
| Fast page write | 1ms full-page (32B) commit time-4–6× faster than comparable EEPROMs |
| Unlimited read cycles | Supports continuous telemetry logging or real-time status polling without wear-out risk |
| RoHS/halogen-free packaging | Meets IPC-J-STD-609A Class 1 for green manufacturing and end-of-life compliance |
Applications
| Industrial Sensor Node | Medical Wearable |
|---|---|
Use Scenario: Storing calibrated offset/gain values for MEMS accelerometers and temperature sensors in factory-floor condition monitors. IC Role / Device Role / Timing Role: Non-volatile configuration register holding factory-trimmed coefficients accessed at boot and updated during recalibration. Use Value: 25,000-cycle endurance ensures 10+ years of quarterly recalibration in harsh environments without memory fatigue. | Use Scenario: Retaining patient-specific therapy parameters and usage history in Bluetooth-enabled insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power parameter store accessed during startup and after dose delivery events. Use Value: 5μA standby current extends coin-cell battery life beyond 12 months while preserving critical treatment data. |
| Smart Metering Module | Automotive Body Control Unit |
Use Scenario: Logging tamper events, tariff schedules, and meter calibration data in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Tamper-proof event logger with WP pin tied to secure microcontroller GPIO for runtime lockout. Use Value: Hardware write protection prevents unauthorized overwrite of regulatory audit logs during field servicing. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: User preference memory mapped into MCU's I²C peripheral address space for fast recall on ignition. Use Value: 400kHz I²C support enables sub-10ms load times for all 32Kbit of profile data during vehicle startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-volatile serial memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | Floating-gate EEPROM; 1M write cycles but higher 3mA write current and 5ms page write time | Higher energy cost per write limits suitability in energy-harvesting nodes | Choose for legacy compatibility where CBRAM qualification is not approved |
| FM24V32-G | F-RAM; unlimited endurance and 150ns write time, but requires 2.7–5.5V supply and larger SOIC-8 footprint | Wider voltage range eases integration with 5V microcontrollers but increases board area | Choose when nanosecond write latency and 10¹⁴ cycle endurance are mandatory |
Compared with AT24C32D-SSHM-T and FM24V32-G, RM24C32C-BTAC-B delivers optimal balance of ultra-low write energy (60nJ), compact TSSOP-8 footprint, and guaranteed 10-year data retention at 70°C-making it ideal for space- and power-constrained industrial edge nodes.
Availability
RM24C32C-BTAC-B is available at Aetrix Electronics and suitable for industrial sensor nodes, medical wearables, smart metering modules, and automotive body control units requiring stable component supply across multi-year production cycles.
Supply support for RM24C32C-BTAC-B 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
Adesto Technologies (acquired by Dialog Semiconductor in 2020, now part of Renesas) specialized in low-power non-volatile memory solutions for resource-constrained IoT endpoints.
The RM24C32C-BTAC-B belongs to Adesto's Mavriq™ CBRAM® serial memory product line, engineered specifically for replacing EEPROM in battery-powered, high-write-frequency embedded systems where energy efficiency and reliability are critical.
FAQ
What is the maximum I²C clock frequency supported by RM24C32C-BTAC-B?
The RM24C32C-BTAC-B supports up to 400kHz I²C clock frequency under standard operating conditions (VCC = 2.7V–3.6V, TA = 0°C to +70°C). It also maintains full functionality at 100kHz for legacy system compatibility. The device does not support Fast-mode Plus (1MHz) or High-speed mode, and timing parameters such as tSCLH (500ns minimum high time) are validated only up to 400kHz.
How does the WP pin function on RM24C32C-BTAC-B?
The WP (Write Protect) pin on RM24C32C-BTAC-B disables all write operations-including byte, page, and address pointer updates-when pulled high to VCC. Write protection is sampled only at the STOP condition of each write command; toggling WP during an active transfer has no effect. Pulling WP low enables normal write functionality, and read operations remain fully accessible regardless of WP state.
Can RM24C32C-BTAC-B replace standard EEPROMs without firmware changes?
Yes, RM24C32C-BTAC-B is designed as a drop-in replacement for 32Kbit I²C EEPROMs like the AT24C32. It uses identical control byte format ("1010" prefix + E2/E1/E0 + R/W), same addressing scheme (A0–A11), and standard I²C protocol sequences. No firmware modification is required-only ensure WP pin logic matches existing design and verify pull-up resistor values (2kΩ recommended for 400kHz).
What is the endurance specification for RM24C32C-BTAC-B, and how is it measured?
RM24C32C-BTAC-B guarantees 25,000 write cycles per memory location, tested per JEDEC JESD22-A117B for resistive memory. Endurance is defined as the number of program/erase cycles before any bit fails to retain its written state for 10 years at 70°C. This rating applies uniformly across the entire 32Kbit array and is not degraded by partial-page writes or mixed read/write workloads.
Is RM24C32C-BTAC-B compatible with 1.8V I²C systems?
No, RM24C32C-BTAC-B requires a minimum VCC of 2.7V and is not rated for 1.8V operation. Its I²C input thresholds (VIH = 0.7×VCC, VIL = 0.3×VCC) and internal logic are specified only for 2.7V–3.6V supply. Interfacing with 1.8V masters requires level-shifting circuitry on both SDA and SCL lines to avoid undefined behavior or excessive leakage.
RM24C32C-BTAC-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Mavriq™
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- CBRAM®
- Technology:
- CBRAM
- Memory Size:
- 32Kbit
- Memory Organization:
- 32 Bytes Page Size
- Memory Interface:
- I2C
- Clock Frequency:
- 750 kHz
- Write Cycle Time - Word, Page:
- 100µs, 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
RM24C32C-BTAC-B FAQ
1.How can I place an order for RM24C32C-BTAC-B through Aetrix?
Please submit a Request for Quotation (RFQ) for RM24C32C-BTAC-B 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 RM24C32C-BTAC-B reliable?
The price and inventory of RM24C32C-BTAC-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM24C32C-BTAC-B is usually 5 days.
3.What payment methods are accepted for RM24C32C-BTAC-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM24C32C-BTAC-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM24C32C-BTAC-B?
RM24C32C-BTAC-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM24C32C-BTAC-B 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 RM24C32C-BTAC-B?
For technical support, including RM24C32C-BTAC-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM24C32C-BTAC-B requirements.
6.How does Aetrix verify that RM24C32C-BTAC-B is sourced from the original manufacturer or authorized distributors?
All RM24C32C-BTAC-B 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 RM24C32C-BTAC-B meets industry standards.
7.What is the process for return or replacement of RM24C32C-BTAC-B?
All RM24C32C-BTAC-B units undergo pre-shipment inspection (PSI). If there is an issue with RM24C32C-BTAC-B, 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 RM24C32C-BTAC-B part is unused and in its original packaging.
Return procedure for RM24C32C-BTAC-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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