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Renesas RM24EP32B-BSNC-T
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- Part No.:
- RM24EP32B-BSNC-T
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
RM24EP32B-BSNC-T.pdf
- Description:
- IC CBRAM 32KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,416
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Product details
Overview
RM24EP32B-BSNC-T from Adesto Technologies is a gamma- and e-beam sterilization-tolerant 32-Kbit I²C-compatible boot memory IC based on CBRAM® resistive memory technology, operating from 2.7V to 3.6V, supporting up to 1MHz I²C bus speed, with 32-byte page write capability and 50 kGy radiation tolerance - deployed in medical sterilizable instrumentation and space-constrained industrial control boot systems.
For engineers reviewing the RM24EP32B-BSNC-T datasheet, RM24EP32B-BSNC-T pinout, RM24EP32B-BSNC-T application, or RM24EP32B-BSNC-T equivalent, this page delivers verified electrical specs, validated I²C timing behavior, confirmed SOIC-8 package mapping, sterilization tolerance evidence, and real-world boot memory use cases requiring radiation-hardened nonvolatile storage.
Technical Context
This device implements a slave-only 2-wire I²C interface with SDA (open-drain, pull-up required) and SCL (input only), supporting standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 MHz) clock rates. Device selection uses three hardware address bits (E0–E2), enabling up to eight devices on one bus.
It features byte and page write operations with deterministic timing: byte write completes within 100 µs (max), page write within 5 ms (max) for full 32-byte pages. Write protection is controlled by the WP pin, which inhibits all writes when tied to VCC, while permitting reads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 32 Kbit (4,096 bytes) - sufficient for secure boot code, calibration tables, or firmware metadata in compact embedded systems. |
| I²C Speed | Up to 1 MHz - enables rapid configuration loading during system startup without CPU polling overhead. |
| Page Size | 32 bytes - matches typical microcontroller cache line sizes and minimizes write latency for firmware patch updates. |
| Radiation Tolerance | 50 kGy gamma & e-beam - validated for single-use medical devices undergoing terminal sterilization without data corruption. |
| Supply Range | 2.7V–3.6V - compatible with modern low-voltage MCUs and battery-backed systems without level-shifting. |
| Write Endurance | 100,000 cycles - supports field-upgradable boot loaders and infrequent parameter reconfiguration. |
| Data Retention | 10 years at 70°C - ensures long-term reliability in industrial environments without refresh circuitry. |
Pinout & Package
RM24EP32B-BSNC-T is housed in an 8-lead JEDEC SOIC (SN) package, 0.150" wide body, gull-wing lead form, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0 | LSB of device address | Hardware-selectable bit enabling unique I²C addressing across up to eight devices on shared bus; logic level compared against control byte E0 bit. |
| E1 | MSB-1 of device address | Second external enable bit used with E0/E2 to configure 3-bit device ID (0–7); no internal pull-up/pull-down - requires explicit PCB biasing. |
| E2 | MSB of device address | Most significant address bit; together with E0/E1, forms 3-bit chip select field in I²C control byte (1010 E2 E1 E0 R/W). |
| GND | Ground reference | Primary return path for VCC, SDA, SCL, and WP; must be low-impedance connection to avoid I²C noise and timing violations. |
| SDA | Serial Data (bidirectional) | Open-drain I²C data line requiring external pull-up (2 kΩ for 1 MHz); changes only during SCL low except for START/STOP signaling. |
| SCL | Serial Clock (input only) | Asynchronous clock input synchronized to master; no internal driver - must be driven by external MCU or bus controller. |
| WP | Write Protect input | Active-high inhibit: tied to VCC blocks all writes (including page/byte) but allows unlimited reads; sampled at STOP command edge. |
| VCC | Power supply | Single 2.7–3.6V supply powering core logic and CBRAM array; includes internal reset circuit with 75 µs power-up delay (tPUD). |
Key Features
| Feature | Design Value |
|---|---|
| CBRAM® memory technology | Enables radiation-hardened nonvolatility without charge-pump circuitry - eliminates wear-out mechanisms common in flash-based EEPROMs. |
| 1 MHz I²C interface | Reduces boot time by >4× versus 100 kHz EEPROMs, critical for time-sensitive medical diagnostics and aerospace initialization sequences. |
| 32-byte page write | Allows atomic update of firmware header blocks or security keys without partial-page corruption risk during power loss. |
| Hardware write protect (WP pin) | Provides fail-safe, board-level control over memory modification - prevents accidental overwrite during field service or firmware recovery. |
| 8-device I²C addressing | Supports modular system designs with multiple boot sources (e.g., primary + backup config, dual-BOM variants) on one controller bus. |
Applications
| Medical Sterilizable Instrumentation | Industrial Control Boot Memory |
|---|---|
|
Use Scenario: Single-use endoscopic camera modules subjected to 50 kGy gamma irradiation pre-deployment. IC Role / Device Role / Timing Role: Stores immutable boot loader and device-specific calibration coefficients accessed within first 100 ms of power-on. Use Value: Guarantees data integrity post-sterilization where conventional EEPROM would suffer parametric shift or bit errors. |
Use Scenario: Programmable logic controller (PLC) with field-upgradable firmware requiring tamper-resistant boot configuration. IC Role / Device Role / Timing Role: Holds secure boot hash, watchdog timeout defaults, and I/O mapping tables loaded before FPGA configuration. Use Value: Enables safe in-field updates via WP-controlled write windows while preserving factory-set safety parameters. |
| Space-Constrained Edge Sensors | Aerospace Avionics Initialization |
|
Use Scenario: Wireless environmental sensor node with <5 mm² PCB area budget and no external voltage regulators. IC Role / Device Role / Timing Role: Provides 32-Kbit nonvolatile storage for sensor fusion algorithms and last-known state recovery. Use Value: Eliminates need for discrete LDO and larger SPI flash, reducing BOM count and enabling conformal coating compatibility. |
Use Scenario: Satellite subsystem power-on sequence requiring radiation-tolerant configuration storage in low-Earth orbit. IC Role / Device Role / Timing Role: Stores boot-time oscillator trim values, thermal compensation coefficients, and fault mask settings. Use Value: Meets ESA/SCC basic radiation hardness requirements without derating or shielding overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C boot memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | Standard EEPROM (not radiation-tolerant); 32-Kbit; 1 MHz I²C; SOIC-8; 1M write cycles; 40-year retention at 25°C. | Lacks 50 kGy gamma/e-beam validation; unsuitable for sterilized medical or space-grade deployments. | Select only for cost-sensitive, non-sterilized industrial controls where radiation exposure is absent. |
| M95320-DFMN6TP | 32-Kbit SPI EEPROM; 20 MHz SPI interface; SOIC-8; rated for 10kGy gamma (not 50 kGy); 1M write cycles. | Requires SPI interface redesign; lower radiation tolerance limits use in terminal sterilization processes. | Choose only if existing design uses SPI and radiation requirement is ≤10 kGy - not a drop-in replacement. |
Compared with AT24C32D-SSHM-T and M95320-DFMN6TP, RM24EP32B-BSNC-T uniquely delivers validated 50 kGy sterilization tolerance in an I²C footprint, enabling direct integration into Class II medical devices and radiation-exposed avionics without interface or layout change - while maintaining identical SOIC-8 mechanical fit and pinout.
Availability
RM24EP32B-BSNC-T is available at Aetrix Electronics and suitable for medical device manufacturing, industrial PLC boot systems, and aerospace subsystem initialization requiring stable component supply with guaranteed sterilization compliance and long-term obsolescence management.
Supply support for RM24EP32B-BSNC-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 Electronics) specialized in ultra-low-power, radiation-tolerant, and high-reliability nonvolatile memory solutions for mission-critical applications.
The RM24EP family was designed specifically for boot memory in sterilizable medical electronics and harsh-environment industrial controllers - leveraging CBRAM® to replace aging EEPROM architectures with superior endurance, speed, and radiation immunity.
FAQ
What is the maximum I²C clock frequency supported by RM24EP32B-BSNC-T?
The RM24EP32B-BSNC-T supports I²C clock frequencies up to 1 MHz under recommended operating conditions (VCC = 2.7–3.6 V, TA = 0–70°C). This is confirmed in Section 11.3 AC Characteristics of DS-RM24EP–048C–6/2014, where fCLK min is 0.1 MHz and max is 1 MHz. The device maintains full timing compliance including tSCLH, tSCLL, and tDAH at this rate, enabling faster boot code loading than legacy 100 kHz EEPROMs.
Does RM24EP32B-BSNC-T require external pull-up resistors on SDA and SCL lines?
Yes, RM24EP32B-BSNC-T requires external pull-up resistors on both SDA and SCL lines because SDA is open-drain and SCL is input-only. Per Section 2.1 Pin Descriptions, typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz or 1 MHz. The pull-up voltage must match VCC (2.7–3.6 V), and total bus capacitance must remain ≤400 pF to meet rise/fall time specifications.
How does the WP pin function on RM24EP32B-BSNC-T?
The WP (Write Protect) pin on RM24EP32B-BSNC-T is active-high: when tied to VCC, it inhibits all write operations (byte, page, and erase) while allowing unlimited read access. As specified in Section 8, WP is sampled at the STOP command edge - toggling WP after STOP has no effect on an ongoing write cycle. This provides hardware-level, board-designable protection against accidental firmware corruption.
Is RM24EP32B-BSNC-T pin-compatible with standard 24C32 EEPROMs?
No, RM24EP32B-BSNC-T is not pin-compatible with standard 24C32 EEPROMs. Although both use 8-pin SOIC packages, RM24EP32B-BSNC-T dedicates pins E0, E1, and E2 for hardware device addressing (enabling up to eight devices on one bus), whereas 24C32 uses A0–A2 for the same purpose but with different pin assignments (A0=A1, A1=A2, A2=NC). Direct substitution would require PCB layout revision.
What is the endurance and data retention specification for RM24EP32B-BSNC-T?
RM24EP32B-BSNC-T is rated for 100,000 write cycles and 10 years of data retention at 70°C, as documented in Section 11.3 AC Characteristics of the datasheet. These values are measured and guaranteed for the CBRAM® memory array under specified operating conditions (VCC = 2.7–3.6 V, TA = 0–70°C), distinguishing it from floating-gate EEPROMs that degrade faster under thermal stress or radiation exposure.
RM24EP32B-BSNC-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 1 MHz
- 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-SOIC
RM24EP32B-BSNC-T FAQ
1.How can I place an order for RM24EP32B-BSNC-T through Aetrix?
Please submit a Request for Quotation (RFQ) for RM24EP32B-BSNC-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 RM24EP32B-BSNC-T reliable?
The price and inventory of RM24EP32B-BSNC-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RM24EP32B-BSNC-T is usually 5 days.
3.What payment methods are accepted for RM24EP32B-BSNC-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RM24EP32B-BSNC-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RM24EP32B-BSNC-T?
RM24EP32B-BSNC-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RM24EP32B-BSNC-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 RM24EP32B-BSNC-T?
For technical support, including RM24EP32B-BSNC-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RM24EP32B-BSNC-T requirements.
6.How does Aetrix verify that RM24EP32B-BSNC-T is sourced from the original manufacturer or authorized distributors?
All RM24EP32B-BSNC-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 RM24EP32B-BSNC-T meets industry standards.
7.What is the process for return or replacement of RM24EP32B-BSNC-T?
All RM24EP32B-BSNC-T units undergo pre-shipment inspection (PSI). If there is an issue with RM24EP32B-BSNC-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 RM24EP32B-BSNC-T part is unused and in its original packaging.
Return procedure for RM24EP32B-BSNC-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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