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Renesas R1EX24032ASAS0I#U0
- Part No.:
- R1EX24032ASAS0I#U0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX24032ASAS0I#U0.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
R1EX24032ASAS0I from Renesas Electronics is a 32-kbit (4,096 × 8-bit) two-wire serial interface EEPROM with I²C bus compatibility, 400 kHz clock frequency, 1.8–5.5 V single-supply operation, and SOP-8 package. It delivers high reliability via MONOS memory technology and supports fast 32-byte page writes for embedded configuration storage in industrial controllers and sensor nodes.
For engineers reviewing the R1EX24032ASAS0I datasheet, R1EX24032ASAS0I pinout, R1EX24032ASAS0I application, or R1EX24032ASAS0I equivalent, key selection considerations include its −40°C to +85°C operating range, 5 ms write cycle time, 1,000k endurance cycles at 25°C, 100-year data retention, and WP pin-based hardware write protection.
Technical Context
This device implements a standard I²C-compatible two-wire serial interface with SDA (open-drain) and SCL (input-only) pins, supporting byte and page write modes up to 32 bytes per cycle. Addressing uses three hardware-selectable device address pins (A0–A2), enabling up to eight devices on one bus.
Internal architecture includes a voltage detector, high-voltage generator for programming, X/Y decoders, and serial-parallel conversion logic. Write protection is controlled by the WP pin: high disables all writes and returns NO ACK; low enables full read/write access with ACK confirmation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 kbit (4,096 × 8-bit) - sufficient for firmware parameter tables, calibration data, or device ID storage in compact systems. |
| Interface | I²C two-wire serial - compatible with standard microcontroller I²C peripherals without additional protocol translation. |
| Max clock frequency | 400 kHz - enables ~100 μs per byte transfer, suitable for non-real-time configuration updates. |
| Write cycle time | 5 ms - defines minimum interval between write commands; impacts system responsiveness during bulk updates. |
| Endurance | 1,000k cycles @25°C - supports frequent recalibration or logging in industrial monitoring applications. |
| Data retention | 100 years @25°C - ensures long-term validity of stored settings across product lifecycles without refresh. |
| Supply voltage | 1.8 V to 5.5 V - interoperable with 3.3 V and 5 V logic domains, simplifying power domain integration. |
| Operating temperature | −40°C to +85°C - qualified for use in extended-temperature industrial and automotive under-hood environments. |
Pinout & Package
Package: 150-mil 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), lead-free and halogen-free (#U0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device address inputs | Hard-wired to VCC/VSS to select one of eight possible I²C addresses; internally pulled down, so floating = logic low. |
| VSS | Ground reference | Return path for all internal circuitry and I/O; must be low-impedance to ensure noise immunity during write cycles. |
| VCC | Power supply | Single 1.8–5.5 V supply; requires 0.1 μF bypass capacitor near pin to suppress power-source noise. |
| WP | Write protect input | Active-high hardware lock: high disables all writes and forces NO ACK; low enables full read/write access. |
| SCL | Serial clock input | Master-generated clock (≤400 kHz); timing-critical for data setup/hold compliance; rise/fall ≤300 ns. |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; used for address, data, and ACK/NACK signaling. |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1,000k write cycles and 100-year data retention while maintaining low-power operation and process scalability. |
| 32-byte page write | Reduces total programming time vs. byte writes-e.g., 32-byte update completes in one 5 ms cycle instead of 32 × 5 ms. |
| Hardware write protection | WP pin provides deterministic, glitch-immune lockout of memory writes-critical for preventing corruption during power transitions. |
| Low standby current | 2.0 μA max at 5.5 V allows battery-backed operation for >10 years in always-on IoT edge nodes. |
| Noise suppression | 50 ns input filter on SCL/SDA rejects common EMI transients, improving robustness in electrically noisy industrial enclosures. |
Applications
| Industrial PLC Configuration Storage | Automotive Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently during commissioning or maintenance; retains values across AC power loss. Use Value: Eliminates need for battery-backed SRAM; 100-year retention ensures parameter integrity over equipment lifetime without service intervention. | Use Scenario: Holding temperature-compensated offset/gain coefficients for pressure or position sensors in engine control modules. IC Role / Device Role / Timing Role: Calibration data repository written once during end-of-line test and read at startup; accessed via microcontroller I²C during boot sequence. Use Value: Enables accurate sensor output across −40°C to +85°C ambient; MONOS reliability prevents drift-induced measurement errors over vehicle lifetime. |
| Smart Meter Firmware Parameters | Medical Device Usage Logs |
Use Scenario: Recording tariff schedules, pulse constants, and communication settings in utility smart meters subject to field firmware updates. IC Role / Device Role / Timing Role: Parameter store updated via secure I²C commands during OTA upgrades; write-protected during normal meter operation. Use Value: WP pin prevents accidental overwrite during transient bus activity; 32-byte page writes accelerate parameter batch updates during scheduled maintenance windows. | Use Scenario: Logging patient session timestamps, error codes, and calibration verification events in portable diagnostic equipment. IC Role / Device Role / Timing Role: Event logger with cyclic overwrite capability; writes occur asynchronously after critical operations, triggered by host MCU. Use Value: 1,000k endurance supports >10 years of daily logging at 270 entries/day; low 1.8 V operation extends battery life in handheld units. |
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, I²C interface, and SOP-8 package; max clock 1 MHz (vs. 400 kHz); lower standby current (0.5 μA typ @ 3.3 V). | Higher speed and lower quiescent current suit battery-constrained wearables; lacks MONOS-specific radiation tolerance claims. | Select when faster write throughput or ultra-low sleep power is prioritized over Renesas' MONOS endurance profile. |
| M95320-DRE6TG | 32 kbit SPI interface (not I²C); SO8 package; 20 MHz clock; 5 ms write cycle; 1M endurance; operates 1.8–5.5 V. | Requires SPI-capable host MCU; incompatible with I²C-only designs; better suited for high-throughput logging where bus bandwidth matters. | Choose only if host system uses SPI exclusively and I²C bus loading or protocol overhead is unacceptable. |
Compared with AT24C32D-SSHM-T and M95320-DRE6TG, the R1EX24032ASAS0I offers superior long-term data retention (100 years vs. typical 40 years) and MONOS-based endurance stability across temperature, making it preferred for infrastructure-grade deployments where field replacement is costly.
Availability
R1EX24032ASAS0I is available at Aetrix Electronics and suitable for industrial PLCs, automotive sensor modules, smart metering systems, and medical diagnostics equipment requiring stable component supply across multi-year production cycles.
Supply support for R1EX24032ASAS0I 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
Renesas Electronics is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The R1EX24xxx series targets cost-sensitive, high-reliability embedded systems needing robust nonvolatile storage; designed specifically for I²C-based configuration and calibration data retention in harsh thermal and electrical environments.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24032ASAS0I?
The R1EX24032ASAS0I supports a maximum I²C clock frequency of 400 kHz, as specified in its AC characteristics table. This limit applies across the full operating temperature range (−40°C to +85°C) and supply voltage range (1.8 V to 5.5 V). Exceeding this frequency may result in timing violations, failed acknowledgments, or corrupted writes. The R1EX24032ASAS0I does not support Fast-mode Plus (1 MHz) or High-speed mode.
How does the WP pin function on the R1EX24032ASAS0I?
The WP (Write Protect) pin on the R1EX24032ASAS0I is an active-high input that disables all write operations when driven high. When WP = high, the device returns NO ACK (acknowledgment "1") after receiving device and memory addresses, blocking writes. When WP = low (or floating, due to internal pull-down), full read/write access is enabled. This hardware-level protection prevents accidental overwrites during power transitions or bus noise events.
What is the endurance rating of the R1EX24032ASAS0I at 85°C?
The R1EX24032ASAS0I has a guaranteed endurance of 100,000 write/erase cycles at 85°C, as documented in the Memory Cell Characteristics table. This is derated from the 1,000,000-cycle rating at 25°C to account for accelerated oxide stress at elevated temperature. The specification is tested and guaranteed-not typical or average-and applies to the full memory array under specified voltage and timing conditions.
Does the R1EX24032ASAS0I require external pull-up resistors on the SDA and SCL lines?
Yes, the R1EX24032ASAS0I requires external pull-up resistors on both SDA and SCL lines because the SDA pin uses an open-drain structure and SCL is input-only. The datasheet specifies VOL ≤ 0.4 V at IOL = 3.0 mA (for VCC ≥ 2.7 V), guiding resistor selection. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance, speed, and VCC; a 4.7 kΩ resistor is commonly used with 3.3 V supplies and ≤400 pF total bus capacitance.
What package type is used for the R1EX24032ASAS0I#U0 variant?
The R1EX24032ASAS0I#U0 is supplied in a 150-mil 8-pin plastic SOP package, identified by Renesas code PRSP0008DF-B and JEITA code FP-8DBV. Its dimensions are 3.9 mm × 4.89 mm × 1.73 mm (L × W × H), with 1.27 mm lead pitch. This package is lead-free and halogen-free, compliant with RoHS Directive 2011/65/EU.
R1EX24032ASAS0I#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- R1EX24xxx
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
R1EX24032ASAS0I#U0 FAQ
1.How can I place an order for R1EX24032ASAS0I#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24032ASAS0I#U0 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 R1EX24032ASAS0I#U0 reliable?
The price and inventory of R1EX24032ASAS0I#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24032ASAS0I#U0 is usually 5 days.
3.What payment methods are accepted for R1EX24032ASAS0I#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24032ASAS0I#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24032ASAS0I#U0?
R1EX24032ASAS0I#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24032ASAS0I#U0 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 R1EX24032ASAS0I#U0?
For technical support, including R1EX24032ASAS0I#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24032ASAS0I#U0 requirements.
6.How does Aetrix verify that R1EX24032ASAS0I#U0 is sourced from the original manufacturer or authorized distributors?
All R1EX24032ASAS0I#U0 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 R1EX24032ASAS0I#U0 meets industry standards.
7.What is the process for return or replacement of R1EX24032ASAS0I#U0?
All R1EX24032ASAS0I#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24032ASAS0I#U0, 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 R1EX24032ASAS0I#U0 part is unused and in its original packaging.
Return procedure for R1EX24032ASAS0I#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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