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Renesas R1EX24032ATAS0I#S0
- Part No.:
- R1EX24032ATAS0I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R1EX24032ATAS0I#S0.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
R1EX24032ATAS0I from Renesas Electronics is a 32-kbit (4,096 × 8-bit) two-wire serial interface EEPROM with I²C-compatible bus interface, 400 kHz clock frequency, 5 ms write cycle time, and TSSOP-8 package. It operates across 1.8 V to 5.5 V supply and supports industrial temperature range (−40°C to +85°C), serving as nonvolatile configuration storage in microcontroller-based embedded systems.
For engineers reviewing the R1EX24032ATAS0I datasheet, R1EX24032ATAS0I pinout, R1EX24032ATAS0I application, or R1EX24032ATAS0I equivalent, key selection considerations include its MONOS memory technology enabling 1,000k endurance cycles and 100-year data retention at 25°C, 32-byte page write capability, and WP pin-controlled hardware write protection.
Technical Context
This device implements a standard I²C protocol-compliant two-wire interface with SDA (open-drain) and SCL pins, supporting up to 400 kHz clock frequency and full 7-bit slave addressing (1010xxxR/W). Its internal address generator and serial-parallel converter enable byte and page write operations without external address latches.
The EEPROM uses MONOS (Metal-Oxide-Nitride-Oxide-Silicon) charge-trapping memory cells fabricated on a CMOS process, delivering low active current (max 3.0 mA write, 1.0 mA read) and ultra-low standby current (max 2.0 μA), with integrated voltage detector and noise suppression (50 ns filter on SCL/SDA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 kbit (4,096 × 8-bit) - provides sufficient space for firmware parameters, calibration data, or device ID storage in compact embedded nodes |
| Interface | I²C two-wire serial - enables simple, low-pin-count connection to MCUs with standard I²C peripherals, no additional address or control lines required |
| Max clock frequency | 400 kHz - supports fast configuration reads and moderate-speed parameter updates without requiring high-speed MCU peripherals |
| Write cycle time | 5 ms (internally timed) - defines minimum interval between write commands; requires ACK polling or timeout handling in host firmware |
| Endurance | 1,000,000 cycles @25°C - ensures reliable operation over product lifetime in applications with frequent parameter logging or counter updates |
| Data retention | 100 years @25°C - guarantees long-term integrity of stored calibration coefficients, serial numbers, or security keys without refresh |
| Supply voltage | 1.8 V to 5.5 V - interoperates with both 3.3 V and 5 V logic domains, eliminating level-shifting needs in mixed-voltage designs |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade deployment in automotive ECUs, industrial sensors, and network infrastructure equipment |
Pinout & Package
Package: 8-pin plastic TSSOP (PTSP0008JC-B / JEITA code TTP-8DAV), 4.4 mm × 3.0 mm body, 0.65 mm pitch, lead-free and halogen-free (#S0 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device address input | Hardwired to VCC/VSS to select one of eight possible I²C addresses (1010xxx); internally pulled down, so unconnected = logic low |
| VSS | Ground reference | Primary return path for all internal circuitry and I/O; must be low-impedance connection to system ground plane |
| VCC | Power supply | Single 1.8–5.5 V supply; requires 0.1 μF ceramic bypass capacitor placed near pin per datasheet recommendation |
| WP | Write protect control | Active-high hardware lock: when high, blocks all writes to entire 32 kbit array; internally pulled down, so unconnected = write-enabled |
| SCL | Serial clock input | Master-generated clock signal; rise/fall time ≤300 ns; noise suppressed for pulses <50 ns |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; timing-critical for ACK/NACK and data validity windows |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1,000k write cycles and 100-year data retention while maintaining low power and high reliability vs. floating-gate EEPROM |
| 32-byte page write | Reduces firmware overhead by allowing up to 32 bytes to be written in one atomic 5 ms cycle, improving parameter update efficiency |
| Hardware write protection (WP) | Prevents accidental overwrites during power transitions or firmware faults; active-high, internally pulled down for fail-safe default |
| Wide supply range (1.8–5.5 V) | Eliminates need for dedicated EEPROM supply rail; compatible with battery-backed, USB-powered, and legacy 5 V systems |
| Industrial temperature grade | Validated operation from −40°C to +85°C ensures robustness in harsh environments without derating or thermal management |
| Lead-free & halogen-free (#S0) | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 requirements for environmentally compliant manufacturing |
Applications
| Industrial Sensor Calibration Storage | Smart Meter Firmware Parameter Retention |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in environmental monitoring nodes. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at boot and updated during field recalibration. Use Value: Ensures measurement accuracy remains traceable across power cycles and firmware upgrades; 100-year retention eliminates field replacement due to data loss. |
Use Scenario: Retaining tariff schedules, billing counters, and communication module settings in electricity/water/gas meters deployed for >10 years. IC Role / Device Role / Timing Role: Long-life data logger storing cumulative energy usage and secure configuration flags resistant to brownouts and EMI. Use Value: 1,000k endurance supports daily metering writes; WP pin prevents tampering with billing registers during field servicing. |
| Automotive Body Control Module (BCM) Settings | IoT Edge Device Identity & Security Keys |
Use Scenario: Saving user preferences (mirror position, seat memory), fault logs, and CAN node configuration in 12 V automotive BCMs. IC Role / Device Role / Timing Role: Robust configuration store interfacing directly with 3.3 V microcontrollers via I²C, surviving load-dump transients. Use Value: −40°C to +85°C rating matches under-hood thermal profile; 1.8 V min supply allows operation during cold-cranking conditions. |
Use Scenario: Securing device-specific cryptographic keys, MAC addresses, and TLS certificate fingerprints in battery-powered edge gateways. IC Role / Device Role / Timing Role: Tamper-resistant identity vault with hardware write lock (WP) preventing unauthorized key erasure or overwrite. Use Value: MONOS cell reliability ensures keys remain intact over 10+ year deployments; 32-byte page write enables atomic key updates. |
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 TSSOP-8 package; max clock 1 MHz; endurance 100k cycles @85°C | Higher speed but lower endurance; lacks MONOS reliability advantages for long-life deployments | Preferred where faster write throughput is critical and ambient temperature stays below 85°C |
| M95320-DWMN6TP | 32 kbit SPI interface (not I²C); SO8 package; 20 MHz clock; 1M endurance @25°C; 40-year retention | Requires SPI peripheral instead of I²C; incompatible bus protocol and pinout | Only viable if host MCU lacks I²C or design already uses SPI EEPROMs; not drop-in replaceable |
Compared with AT24C32D-SSHM-T and M95320-DWMN6TP, the R1EX24032ATAS0I offers superior data retention (100 vs. 40 years) and industrial-grade endurance consistency across temperature, making it optimal for mission-critical, long-lifecycle embedded systems where I²C is available.
Availability
R1EX24032ATAS0I is available at Aetrix Electronics and suitable for industrial sensor calibration storage, smart meter firmware parameter retention, and automotive body control module settings requiring stable component supply and long-term lifecycle support.
Supply support for R1EX24032ATAS0I 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 global semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The R1EX24xxx series was designed specifically for high-reliability, low-power embedded systems requiring long-term nonvolatile storage with minimal footprint and I²C simplicity.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24032ATAS0I?
The R1EX24032ATAS0I supports a maximum I²C clock frequency of 400 kHz, as specified in its AC characteristics table. This frequency is guaranteed across the full operating temperature range (−40°C to +85°C) and supply voltage range (1.8 V to 5.5 V). Exceeding this limit may result in timing violations, failed ACKs, or unreliable data transfer.
How does the Write Protect (WP) pin function on the R1EX24032ATAS0I?
On the R1EX24032ATAS0I, the WP pin is active-high: when driven high, it disables all write operations to the entire 32 kbit memory array, and the device responds with NACK after address transmission. When WP is low or left unconnected (due to internal pull-down), full read/write access is enabled. This provides hardware-level protection against accidental writes during power-up/down or firmware errors.
What is the typical write cycle time for the R1EX24032ATAS0I, and how should host firmware handle it?
The R1EX24032ATAS0I has a typical write cycle time of 5 ms, which is internally controlled after a STOP condition. Host firmware must either wait this fixed duration or use acknowledge polling-repeatedly sending the device address with R/W=0 until an ACK is received-to determine completion. This avoids blind delays and improves system responsiveness during sequential writes.
Does the R1EX24032ATAS0I support page write operations, and what is the page size?
Yes, the R1EX24032ATAS0I supports page write operations with a fixed page size of 32 bytes. Up to 32 consecutive bytes can be loaded into the internal buffer and written atomically in a single 5 ms cycle. Address bits A0–A4 auto-increment during page write; exceeding the page boundary causes rollover within the same page, not wraparound to the next page.
What package type and dimensions does the R1EX24032ATAS0I use?
The R1EX24032ATAS0I uses an 8-pin plastic TSSOP package (JEITA code TTP-8DAV, Renesas code PTSP0008JC-B), measuring 4.4 mm × 3.0 mm with 0.65 mm lead pitch. It is lead-free and halogen-free, compliant with RoHS Directive 2011/65/EU, and weighs approximately 0.034 g.
R1EX24032ATAS0I#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- 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:
- 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-TSSOP
R1EX24032ATAS0I#S0 FAQ
1.How can I place an order for R1EX24032ATAS0I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24032ATAS0I#S0 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 R1EX24032ATAS0I#S0 reliable?
The price and inventory of R1EX24032ATAS0I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24032ATAS0I#S0 is usually 5 days.
3.What payment methods are accepted for R1EX24032ATAS0I#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24032ATAS0I#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24032ATAS0I#S0?
R1EX24032ATAS0I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24032ATAS0I#S0 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 R1EX24032ATAS0I#S0?
For technical support, including R1EX24032ATAS0I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24032ATAS0I#S0 requirements.
6.How does Aetrix verify that R1EX24032ATAS0I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX24032ATAS0I#S0 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 R1EX24032ATAS0I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX24032ATAS0I#S0?
All R1EX24032ATAS0I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24032ATAS0I#S0, 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 R1EX24032ATAS0I#S0 part is unused and in its original packaging.
Return procedure for R1EX24032ATAS0I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24032ATAS0I#S0 Tags
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