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Renesas R1EX24004ASAS0I#S0
- Part No.:
- R1EX24004ASAS0I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX24004ASAS0I#S0.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,188
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Product details
Overview
R1EX24004ASAS0I from Renesas Electronics is a 4 kbit (512 × 8-bit) two-wire serial interface EEPROM with I²C bus compatibility, 400 kHz clock frequency, 1.8–5.5 V single-supply operation, and 16-byte page write capability-used for nonvolatile parameter storage in embedded control modules, sensor calibration data retention, and configuration memory in industrial HMIs.
For engineers reviewing the R1EX24004ASAS0I datasheet, R1EX24004ASAS0I pinout, R1EX24004ASAS0I application, or R1EX24004ASAS0I equivalent, key selection considerations include its SOP-8 package, −40°C to +85°C industrial temperature range, 100-year data retention at 25°C, and WP-enabled hardware write protection for system-level firmware safety.
Technical Context
This device implements a two-wire I²C-compatible serial interface with fixed 1010 device code and user-configurable A0–A2 address pins enabling up to four devices on one bus. It uses MONOS memory technology for high reliability and integrates internal voltage detection and noise suppression (50 ns filter) to ensure robust operation under noisy industrial conditions.
The EEPROM supports byte and page write modes, with automatic address incrementing during page writes up to 16 bytes per cycle. Acknowledge polling enables host software to detect write completion without fixed timing delays, and the internally pulled-down A0/A1/A2/SDA/SDA/WP pins simplify default-safe board design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 kbit (512 × 8-bit) - sufficient for storing calibration coefficients, device IDs, or small configuration tables in space-constrained designs |
| Interface | I²C two-wire serial - compatible with standard microcontroller I²C peripherals without additional level-shifting in 1.8–5.5 V systems |
| Max clock frequency | 400 kHz - supports fast parameter updates while maintaining noise immunity in electrically noisy environments |
| Write cycle time | 5 ms max - defines minimum interval between write commands; enables predictable firmware update latency |
| Data retention | 100 years min @25°C - ensures long-term validity of stored settings across product lifetime without refresh |
| Endurance | 1,000k write cycles @25°C - supports frequent recalibration or logging in field-deployed equipment |
| Supply voltage | 1.8 V to 5.5 V - interoperable with both low-voltage MCUs (e.g., ARM Cortex-M0+) and legacy 5 V logic |
| Operating temp | −40°C to +85°C - qualified for industrial automation, automotive body electronics, and outdoor metering applications |
Pinout & Package
Package: 150-mil 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), lead-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device address input | Hard-wired to VSS or VCC to select one of four possible I²C addresses; internally pulled down - safe open-circuit default |
| A1 | Device address input | Second address bit; enables multi-device bus topology without external logic; same pull-down behavior as A0 |
| A2 | Device address input (NC for 4k) | No connection for 4k variant; unused but present in pinout; internally pulled down - no floating risk |
| VSS | Ground reference | System common return path; must be low-impedance to support stable read/write current and noise immunity |
| VCC | Power supply | Single 1.8–5.5 V rail; requires 0.1 μF bypass capacitor near pin to suppress power-source noise |
| WP | Hardware write protect | Active-high; disables all writes when driven high; internally pulled down - defaults to writable unless externally asserted |
| SCL | Serial clock input | Open-drain compatible; requires external pull-up; timing-critical for 400 kHz operation and noise suppression |
| SDA | Serial data I/O | Bidirectional open-drain line; requires external pull-up; transitions only allowed during SCL low period per I²C spec |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1,000k endurance and 100-year data retention without wear leveling firmware overhead |
| 16-byte page write | Reduces average write time by up to 75% vs. byte-write-only EEPROMs when updating consecutive parameters |
| Internal voltage detector | Prevents spurious writes during power ramp-up/down, eliminating need for external POR circuitry |
| 50 ns noise suppression | Filters transient glitches on SCL/SDA lines, improving reliability in motor-drive or relay-switching environments |
| Pulled-down address & WP pins | Permits simplified PCB layout with unconnected A0/A1/A2/WP - defaults to safe, functional state without external resistors |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in PLC I/O modules. IC Role / Device Role / Timing Role: Nonvolatile parameter memory accessed during power-on initialization and periodic self-calibration routines. Use Value: Eliminates need for external trimming components and enables field recalibration via I²C without firmware update. | Use Scenario: Retaining tariff schedules, billing counters, and communication module settings in electricity/water meters operating for >10 years unattended. IC Role / Device Role / Timing Role: Secure, long-life configuration store with WP pin tied to MCU GPIO for write-lock during normal operation. Use Value: Guarantees 100-year data integrity and 1M+ write cycles-meeting ANSI C12.22 and DLMS/COSEM compliance requirements. |
| Embedded HMI Display Settings | Automotive Body Control Module |
Use Scenario: Saving user preferences (brightness, language, contrast) and last-displayed screen state in touch-panel HMIs for factory HMIs and medical devices. IC Role / Device Role / Timing Role: Low-power I²C slave memory accessed only during UI state changes or power-cycle restore. Use Value: 2.0 μA standby current extends battery life in portable HMIs; 1.8 V operation supports direct connection to 1.8 V display controllers. | Use Scenario: Storing seat position memory, mirror fold/unfold presets, and door lock configuration in 12 V automotive body ECUs. IC Role / Device Role / Timing Role: Robust configuration EEPROM interfaced to 3.3 V microcontroller via isolated I²C bus with WP controlled by ignition signal. Use Value: −40°C to +85°C rating and built-in power-on reset prevent corruption during cold cranking or thermal cycling in engine bay proximity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04D-SSHM-T | 4 kbit, 1 MHz I²C, 1.7–5.5 V, TSSOP-8; lacks MONOS tech - 100k endurance @85°C | Higher speed but lower high-temp endurance; not qualified for extended 85°C continuous operation | Choose for cost-sensitive consumer apps where 100k cycles suffice and 1 MHz speed improves boot time |
| M95040-DRMN6TP/K | 4 kbit, SPI interface, 1.8–5.5 V, SO8; no WP pin - write protection via software command only | Requires SPI host; no hardware write lock - unsuitable for safety-critical parameter storage | Choose when existing design uses SPI peripherals and hardware WP is not required for functional safety |
Compared with AT24C04D-SSHM-T and M95040-DRMN6TP/K, R1EX24004ASAS0I delivers superior high-temperature endurance and integrated hardware write protection in an I²C-compatible SOP-8 package-making it optimal for industrial and automotive applications demanding long-term reliability and fail-safe configuration storage.
Availability
R1EX24004ASAS0I is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded HMI display settings requiring stable component supply across multi-year production cycles.
Supply support for R1EX24004ASAS0I 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 leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The R1EX24xxx series was designed specifically for robust, long-life nonvolatile storage in harsh industrial and automotive environments-emphasizing data integrity, low-power operation, and noise-immune serial interface performance.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24004ASAS0I?
The R1EX24004ASAS0I supports a maximum I²C clock frequency of 400 kHz, as specified in its AC characteristics table. This value is guaranteed across the full operating temperature range (−40°C to +85°C) and supply voltage range (1.8 V to 5.5 V). The device does not support standard-mode (100 kHz) only-it is fully Fast-mode compliant, enabling faster parameter updates than legacy 100 kHz EEPROMs while maintaining noise resilience.
Does the R1EX24004ASAS0I require external pull-up resistors on SDA and SCL lines?
Yes, the R1EX24004ASAS0I requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain output structures. The datasheet specifies VOL ≤ 0.4 V at IOL = 3.0 mA (for VCC ≥ 2.7 V), so pull-up values must be selected considering bus capacitance, desired rise time, and VOL margin. Typical values range from 2.2 kΩ to 10 kΩ depending on system layout and speed requirements.
How does the write protect (WP) pin function on the R1EX24004ASAS0I?
When the WP pin is driven high (VIH ≥ 0.7 × VCC), the R1EX24004ASAS0I disables all write operations-including byte, page, and erase-and returns a NO ACK ('1') after receiving write data. When WP is low or floating (internally pulled down to VSS), full read/write access is enabled. This hardware-level protection prevents accidental overwrites during power transients or firmware errors, independent of I²C command execution.
What is the endurance specification for the R1EX24004ASAS0I at 85°C?
The R1EX24004ASAS0I guarantees a minimum endurance of 100,000 write cycles at 85°C, as documented in the Memory Cell Characteristics table. This is distinct from its 1,000,000-cycle rating at 25°C and reflects realistic degradation under sustained high-temperature operation-critical for applications like automotive ECUs or industrial controllers deployed in hot enclosures.
Can the R1EX24004ASAS0I be used with a 1.8 V microcontroller I²C interface?
Yes, the R1EX24004ASAS0I is fully compatible with 1.8 V I²C interfaces: its VIH threshold is defined as VCC × 0.7 (so ~1.26 V at VCC = 1.8 V), and VIL is specified down to −0.3 V (with pulse-width allowance). Its 1.8–5.5 V supply range, 2.0 μA standby current, and 0.2 mA typical read current at 3.3 V make it ideal for ultra-low-power 1.8 V systems such as battery-powered sensors and wearable HMIs.
R1EX24004ASAS0I#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 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
R1EX24004ASAS0I#S0 FAQ
1.How can I place an order for R1EX24004ASAS0I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24004ASAS0I#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 R1EX24004ASAS0I#S0 reliable?
The price and inventory of R1EX24004ASAS0I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24004ASAS0I#S0 is usually 5 days.
3.What payment methods are accepted for R1EX24004ASAS0I#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24004ASAS0I#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24004ASAS0I#S0?
R1EX24004ASAS0I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24004ASAS0I#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 R1EX24004ASAS0I#S0?
For technical support, including R1EX24004ASAS0I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24004ASAS0I#S0 requirements.
6.How does Aetrix verify that R1EX24004ASAS0I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX24004ASAS0I#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 R1EX24004ASAS0I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX24004ASAS0I#S0?
All R1EX24004ASAS0I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24004ASAS0I#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 R1EX24004ASAS0I#S0 part is unused and in its original packaging.
Return procedure for R1EX24004ASAS0I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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