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Renesas R1EX24002ATAS0A#U0
- Part No.:
- R1EX24002ATAS0A#U0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1EX24002ATAS0A#U0.pdf
- Description:
- EEPROM, 256X8, SERIAL
- Quantity:
- Payment:
- Shipping:
Inventory:700
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Product details
Overview
R1EX24002ATAS0A from Renesas Electronics is a 2 kbit (256 × 8-bit) two-wire serial interface EEPROM with I²C-compatible bus interface, 1.8 V to 5.5 V single-supply operation, 400 kHz maximum clock frequency, and TSSOP-8 package. It delivers high reliability for configuration storage in consumer electronics, industrial controllers, and power management systems.
For engineers reviewing the R1EX24002ATAS0A datasheet, R1EX24002ATAS0A pinout, R1EX24002ATAS0A application, or R1EX24002ATAS0A equivalent, key selection considerations include write endurance (1,000k cycles @25°C), data retention (100 years @25°C), page-write capability (16-byte/page), WP pin-controlled hardware write protection, and −40°C to +85°C industrial temperature support.
Technical Context
This device implements a standard I²C-compliant two-wire serial interface with fixed device code "1010", three hardware address pins (A0–A2), and open-drain SDA/SCL drivers requiring external pull-ups. It uses MNOS memory technology with CMOS low-voltage circuitry to achieve low-power operation and high reliability.
The internal architecture includes an 8-bit address register, 256-word memory array, page write buffer (16 bytes), automatic write-cycle timing (5 ms max), and on-chip voltage generator for programming. Write protection is controlled by the WP pin level, enabling full-array lockout when high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 kbit (256 × 8-bit) - supports small-system configuration storage without over-provisioning |
| Interface | I²C two-wire serial - compatible with standard microcontroller I²C peripherals and simplifies PCB routing |
| Supply voltage | 1.8 V to 5.5 V - interoperable across 1.8 V, 3.3 V, and 5 V logic domains |
| Max clock frequency | 400 kHz - enables fast read/write within standard-mode I²C timing budgets |
| Write cycle time | 5 ms max - defines minimum interval between write commands; supports acknowledge polling |
| Endurance | 1,000k cycles @25°C - ensures long-term field reliability for frequent parameter updates |
| Data retention | 100 years @25°C - guarantees nonvolatile storage integrity over product lifetime |
| Operating temperature | −40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm footprint, 0.65 mm pitch, lead-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware device address inputs | Set 3-bit slave address (000–111); enable up to eight devices on same I²C bus |
| VSS | Ground reference | Return path for all internal circuits and I/O; must be low-impedance connection |
| VCC | Power supply input | Single 1.8–5.5 V supply; powers memory array, logic, and interface circuitry |
| WP | Write protect control | High = full-array write disable; low = normal read/write; no external pull required |
| SCL | Serial clock input | Open-drain input; controls timing of data transfer; max 400 kHz; requires external pull-up |
| SDA | Serial data I/O | Open-drain bidirectional line; carries address, data, and ACK/NACK; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write | Reduces firmware overhead by allowing burst writes up to page boundary without repeated start conditions |
| Hardware write protection | WP pin enables system-level lockout of memory writes-no software dependency or vulnerability |
| Low standby current | 2 µA max at VCC = 5.5 V - minimizes quiescent power in always-on embedded systems |
| Automatic power-on reset | Prevents spurious writes during VCC ramp-up/down; requires SCL/SDA held static during power transitions |
| Noise suppression | 50 ns glitch rejection on SCL/SDA - improves robustness in electrically noisy industrial environments |
| Lead-free & RoHS compliant | Meets environmental compliance requirements for global commercial and industrial deployment |
Applications
| Consumer Audio Configuration | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing user EQ presets, volume limits, and input source mapping in portable Bluetooth speakers. IC Role / Device Role: Nonvolatile configuration storage with infrequent writes and frequent reads via I²C host MCU. Use Value: Enables persistent settings across power cycles without battery backup; 100-year retention eliminates field recalibration. | Use Scenario: Holding factory-calibrated offset/gain coefficients for analog temperature and pressure sensors in HVAC controllers. IC Role / Device Role: Secure, tamper-resistant calibration data repository accessed only during initialization or service mode. Use Value: WP pin prevents accidental overwrite during field firmware updates; 1,000k endurance supports lifetime recalibration cycles. |
| Power Supply Sequencing Table | Smart Meter Firmware Patch Storage |
Use Scenario: Storing multi-rail power-up/down timing delays and voltage thresholds in programmable PMICs for FPGA-based systems. IC Role / Device Role: Boot-time configuration loader for power management logic; accessed once per power cycle. Use Value: 1.8 V compatibility allows direct interfacing with low-voltage PMICs; 5 ms write time fits within safe boot window. | Use Scenario: Storing signed firmware patch metadata (version, CRC, activation flag) in utility-grade smart meters with remote update capability. IC Role / Device Role: Secure auxiliary storage for patch validation state-written only after cryptographic verification succeeds. Use Value: Hardware WP lock ensures patch flags cannot be altered by corrupted or malicious firmware; −40°C to +85°C rating matches meter enclosure environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02C-SSHM-T | Same 2 kbit capacity, I²C interface, and TSSOP-8 package; 1 MHz max clock; lower 100 µA active current but no WP pin | Lacks hardware write protection; requires software-managed lockout or external logic for secure write control | Choose when higher-speed reads are needed and WP functionality is implemented elsewhere in system design |
| M95020-WMN6TP | Same 2 kbit, SPI interface (not I²C); SO8 package; 20 MHz max clock; 5 ms write time; WP pin present | Requires SPI host interface instead of I²C; different pinout and protocol stack integration effort | Choose when existing design uses SPI peripherals and board layout already accommodates SO8 footprint |
Compared with AT24C02C-SSHM-T and M95020-WMN6TP, R1EX24002ATAS0A provides native I²C compatibility with integrated WP pin in a compact TSSOP-8 package-ideal for space-constrained industrial designs requiring guaranteed write security without added components or firmware complexity.
Availability
R1EX24002ATAS0A is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware patch storage, and power supply sequencing table applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for R1EX24002ATAS0A 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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and consumer markets.
The R1EX24xxx series was designed specifically for reliable, low-power, two-wire serial configuration storage in cost-sensitive and space-constrained embedded systems-emphasizing write endurance, data retention, and industrial temperature operation.
FAQ
What is the maximum I²C clock frequency supported by R1EX24002ATAS0A?
R1EX24002ATAS0A supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This timing is validated across the full operating voltage range (1.8 V to 5.5 V) and temperature range (−40°C to +85°C). Exceeding 400 kHz may result in failed ACK or data corruption due to internal timing constraints.
Does R1EX24002ATAS0A require external pull-up resistors on SDA and SCL lines?
Yes, R1EX24002ATAS0A requires external pull-up resistors on both SDA and SCL lines because it uses open-drain output drivers. The recommended resistor value depends on bus capacitance and desired rise time; typical values range from 2.2 kΩ to 10 kΩ for 400 kHz operation with ≤400 pF total capacitance. Pull-ups must connect to the same VCC domain as the device.
How does the WP pin function on R1EX24002ATAS0A?
On R1EX24002ATAS0A, the WP (Write Protect) pin enables hardware-level write lockout: when WP = VIH (≥0.7 × VCC), all memory writes are disabled and the device responds with NACK after address transmission; when WP = VIL (≤0.3 × VCC), full read/write access is enabled. No external pull-up or pull-down is required-direct connection to VCC or VSS suffices.
What is the page write size and how does it improve efficiency for R1EX24002ATAS0A?
R1EX24002ATAS0A supports 16-byte page writes, meaning up to 16 consecutive bytes can be written in a single I²C transaction before initiating the internal 5 ms write cycle. This reduces protocol overhead versus byte-wise writes-cutting I²C start/stop/ACK sequences by up to 94% for full-page updates-and accelerates bulk configuration storage in systems like sensor calibration or firmware patch tables.
Is R1EX24002ATAS0A qualified for automotive applications?
No, R1EX24002ATAS0A is rated for Standard quality grade per Renesas documentation and is intended for consumer and industrial applications such as audio equipment, industrial controllers, and meters. It is not AEC-Q100 qualified and lacks extended temperature or reliability validation for automotive use. For automotive designs, consult Renesas' dedicated automotive EEPROM portfolio.
R1EX24002ATAS0A#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- -
- Memory Format:
- -
- Technology:
- -
- Memory Size:
- -
- Memory Organization:
- -
- Memory Interface:
- -
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
R1EX24002ATAS0A#U0 FAQ
1.How can I place an order for R1EX24002ATAS0A#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24002ATAS0A#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 R1EX24002ATAS0A#U0 reliable?
The price and inventory of R1EX24002ATAS0A#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24002ATAS0A#U0 is usually 5 days.
3.What payment methods are accepted for R1EX24002ATAS0A#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24002ATAS0A#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24002ATAS0A#U0?
R1EX24002ATAS0A#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24002ATAS0A#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 R1EX24002ATAS0A#U0?
For technical support, including R1EX24002ATAS0A#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24002ATAS0A#U0 requirements.
6.How does Aetrix verify that R1EX24002ATAS0A#U0 is sourced from the original manufacturer or authorized distributors?
All R1EX24002ATAS0A#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 R1EX24002ATAS0A#U0 meets industry standards.
7.What is the process for return or replacement of R1EX24002ATAS0A#U0?
All R1EX24002ATAS0A#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24002ATAS0A#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 R1EX24002ATAS0A#U0 part is unused and in its original packaging.
Return procedure for R1EX24002ATAS0A#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24002ATAS0A#U0 Tags
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