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Renesas RM24C32C-BTAC-T
- Part No.:
- RM24C32C-BTAC-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
RM24C32C-BTAC-T.pdf
- Description:
- IC CBRAM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
RM24C32C-BTAC-T 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 energy-efficient EEPROM replacement in embedded microcontroller systems requiring frequent low-energy writes.
For engineers reviewing the RM24C32C-BTAC-T datasheet, RM24C32C-BTAC-T pinout, RM24C32C-BTAC-T application, or RM24C32C-BTAC-T equivalent, key selection criteria include its 60nJ byte-write energy, 1ms full-page write time, 25,000-cycle endurance, 10-year data retention, and dual SOIC/TSSOP package compatibility for space-constrained industrial control and IoT sensor nodes.
Technical Context
This device implements a slave-only I²C interface with SDA (open-drain) and SCL (input-only) pins, using external E0–E2 address bits to support up to eight devices on one bus. Its internal address pointer auto-increments during sequential reads and wraps within 32-byte pages during writes.
CBRAM® technology enables direct-write operation without erase cycles, delivering 4–6× faster page writes than comparable EEPROMs and eliminating pre-erase latency. Write protection is hardware-controlled via the WP pin, sampled only at STOP command assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 32Kbit (4,096 × 8-bit), sufficient for firmware parameter storage or calibration data in compact MCU designs |
| Interface | I²C-compatible 2-wire bus (SCL/SDA), supports standard (100kHz) and fast (400kHz) modes for flexible timing integration |
| Write energy per byte | 60nJ - reduces cumulative power consumption by ~90% vs. legacy EEPROM in high-write-count logging applications |
| Page write time | 1ms maximum - enables burst storage of sensor arrays or configuration blocks without blocking host CPU for >10× longer than EEPROM |
| Data retention | 10 years at 70°C - validated for long-life deployment in unattended industrial gateways and automotive body modules |
| Endurance | 25,000 write cycles - suitable for daily firmware update logging or runtime parameter tuning over 5+ years of field operation |
| Supply current (standby) | 5μA - allows continuous battery-backed operation for >10 years on a CR2032 coin cell in always-on edge sensors |
Pinout & Package
RM24C32C-BTAC-T is supplied in an 8-lead TSSOP package (JEDEC MO-153, 3mm × 4.4mm body), compatible with automated SMT assembly and offering improved thermal dissipation over SOIC in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0 | LSB device address enable | One of three hardware-selectable address bits enabling up to eight devices on shared I²C bus without software configuration |
| E1 | MSB-1 device address enable | Second bit of 3-bit chip select; combined with E0/E2, sets unique 7-bit I²C slave address (1010_E2_E1_E0) |
| E2 | MSB device address enable | Most significant bit of hardware address; determines device presence during control byte matching phase |
| GND | Reference ground | Return path for all internal logic and I/O; must be low-impedance connection to avoid SDA/SCL noise coupling |
| SDA | Bidirectional serial data | Open-drain I²C data line requiring external pull-up (2kΩ for 400kHz); changes only during SCL low for data stability |
| SCL | Serial clock input | Slave-only clock input; synchronizes all read/write transfers; no internal clock generation capability |
| WP | Hardware write protect | Pulled high to VCC to inhibit all write operations (byte/page); sampled only at STOP command, not dynamically monitored |
| VCC | Power supply | 2.7V–3.6V single supply; internal reset releases after 75μs tPUD delay once VCC crosses 2.4V (VVCCI threshold) |
Key Features
| Feature | Design Value |
|---|---|
| CBRAM® resistive memory technology | Enables true "direct-write" operation-no erase-before-write-reducing write latency and extending endurance beyond floating-gate limitations |
| 32-byte page write buffer | Allows burst programming of sensor frame buffers or configuration tables in one atomic I²C transaction, minimizing bus occupancy |
| Unlimited read cycles | Supports continuous real-time monitoring and status polling without wear-out concerns in HMI or telemetry applications |
| Hardware write protection (WP pin) | Provides fail-safe, board-level write disable independent of firmware state-critical for bootloader or security-critical parameter regions |
| RoHS-compliant & halogen-free packaging | Meets global environmental compliance requirements for industrial and consumer electronics without compromising thermal or mechanical reliability |
Applications
| Industrial Sensor Node | Smart Meter Data Logging |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor node recording hourly readings for 30 days before upload. IC Role / Device Role / Timing Role: Non-volatile storage for timestamped sensor values; retains data across power cycles and brownouts. Use Value: 60nJ byte-write energy extends CR2032 battery life to >5 years; 10-year retention ensures calibration data integrity over product lifetime. | Use Scenario: Electricity meter storing tamper events, billing intervals, and firmware update logs in harsh EMI environments. IC Role / Device Role / Timing Role: Secure, write-protected event log memory; WP pin tied to secure voltage rail to prevent unauthorized overwrite. Use Value: 25,000-cycle endurance supports daily log entries for >68 years; 400kHz I²C enables rapid log dump during communication windows. |
| Automotive Body Control Module | IoT Edge Gateway Configuration |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in 12V vehicle subsystems with wide temperature swings. IC Role / Device Role / Timing Role: Parameter storage IC interfacing directly with MCU I²C peripheral; operates across -40°C to +105°C ambient (derated). Use Value: 2.7V–3.6V supply range tolerates automotive battery transients; 1ms page write enables fast profile switching during user interaction. | Use Scenario: Field-upgradable gateway storing network credentials, OTA update metadata, and device-specific keys. IC Role / Device Role / Timing Role: Trusted configuration store accessed during boot and update phases; write-protected during normal operation. Use Value: Hardware WP pin prevents accidental credential corruption; unlimited read cycles allow continuous key validation without wear penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial non-volatile memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | EEPROM-based; 1mA active read current; 5ms page write; 1M write cycles; requires erase-before-write | Higher energy per write (600nJ), slower page writes, but broader temperature grade (-40°C to +85°C) | Select for extended temp range where CBRAM's 0°C–70°C rating is insufficient; accept higher power and latency trade-offs |
| FM24V32-G | F-RAM-based; 150μA standby; unlimited endurance; 3.3V-only supply; 1MHz I²C support | No write latency, zero write energy, but higher cost and limited to 3.3V systems | Select when deterministic sub-μs writes and infinite endurance are mandatory, and 3.3V supply is guaranteed |
Compared with AT24C32D-SSHM-T and FM24V32-G, RM24C32C-BTAC-T delivers optimal balance of ultra-low write energy (60nJ), 1ms page speed, and commercial-grade cost for battery-sensitive, high-write-frequency applications-without requiring voltage regulation or thermal derating overhead.
Availability
RM24C32C-BTAC-T is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter data logging, and automotive body control modules requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for RM24C32C-BTAC-T 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 based on proprietary CBRAM® technology.
The RM24C32C-BTAC-T belongs to Adesto's Mavriq™ family of CBRAM® serial memories, designed specifically to replace EEPROM in energy-constrained, high-write-cycle embedded systems while maintaining I²C protocol compatibility.
FAQ
What is the maximum I²C clock frequency supported by RM24C32C-BTAC-T?
The RM24C32C-BTAC-T supports I²C bus speeds up to 400kHz under standard operating conditions (VCC = 2.7V–3.6V, TA = 0°C to +70°C). It is also backward-compatible with 100kHz standard-mode operation. The device does not support fast-mode plus (1MHz) or high-speed mode, and timing parameters such as tSCLH (500ns minimum) and tSCLL (500ns minimum) are specified to ensure reliable communication at 400kHz.
Does RM24C32C-BTAC-T require an external pull-up resistor on the SDA line?
Yes, RM24C32C-BTAC-T requires an external pull-up resistor on the SDA line because its SDA pin is open-drain. The datasheet specifies 2kΩ for 400kHz operation and 10kΩ for 100kHz. Pull-up to VCC is mandatory for proper I²C bus signaling; failure to install it will result in communication failure. The SCL line also requires a pull-up, though it is input-only.
How does the WP pin function on RM24C32C-BTAC-T?
The WP (Write Protect) pin on RM24C32C-BTAC-T is sampled only at the STOP condition of each write command. When pulled high to VCC, it inhibits all byte and page write operations-though the device still acknowledges addresses and data. When pulled low to GND, writes are enabled. WP has no effect on read operations, and toggling WP during a write cycle has no impact; protection state is latched only at STOP.
Can RM24C32C-BTAC-T be used as a direct drop-in replacement for standard EEPROMs like AT24C32?
RM24C32C-BTAC-T is pin- and protocol-compatible with AT24C32-series EEPROMs (same 8-pin TSSOP footprint, identical I²C addressing, and control byte format), but it is not a functional drop-in due to CBRAM®'s direct-write architecture: no erase step is needed, and write timing differs (1ms page vs. 5ms). Firmware must accommodate faster completion and remove any EEPROM-specific erase delays-but no hardware changes are required.
What is the endurance specification for RM24C32C-BTAC-T, and how is it measured?
RM24C32C-BTAC-T is rated for 25,000 write cycles per memory location, per JEDEC JESD22-A117B. This endurance applies to both byte and page writes and is verified across the full 32Kbit array. Unlike EEPROM, CBRAM® endurance is not degraded by partial-page writes or mixed read/write patterns. Endurance testing assumes operation within the specified voltage (2.7V–3.6V) and temperature (0°C–70°C) ranges.
RM24C32C-BTAC-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- Mavriq™
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for RM24C32C-BTAC-T through Aetrix?
Please submit a Request for Quotation (RFQ) for RM24C32C-BTAC-T 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-T reliable?
The price and inventory of RM24C32C-BTAC-T 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-T is usually 5 days.
3.What payment methods are accepted for RM24C32C-BTAC-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM24C32C-BTAC-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM24C32C-BTAC-T?
RM24C32C-BTAC-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM24C32C-BTAC-T 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-T?
For technical support, including RM24C32C-BTAC-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM24C32C-BTAC-T requirements.
6.How does Aetrix verify that RM24C32C-BTAC-T is sourced from the original manufacturer or authorized distributors?
All RM24C32C-BTAC-T 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-T meets industry standards.
7.What is the process for return or replacement of RM24C32C-BTAC-T?
All RM24C32C-BTAC-T units undergo pre-shipment inspection (PSI). If there is an issue with RM24C32C-BTAC-T, 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-T part is unused and in its original packaging.
Return procedure for RM24C32C-BTAC-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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