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Renesas R1EX24008ATAS0I#S0
- Part No.:
- R1EX24008ATAS0I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R1EX24008ATAS0I#S0.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
R1EX24008ATAS0I from Renesas Electronics is an 8 kbit (1024 × 8-bit) two-wire serial interface EEPROM with I²C-compatible bus operation, 400 kHz clock frequency, 1.8–5.5 V single-supply operation, and TSSOP-8 packaging. It delivers high reliability via MONOS memory technology, supports 16-byte page writes, and is rated for −40°C to +85°C industrial temperature operation in embedded control and sensor calibration applications.
For engineers reviewing the R1EX24008ATAS0I datasheet, R1EX24008ATAS0I pinout, R1EX24008ATAS0I application, or R1EX24008ATAS0I equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and confirmed alternative parts with documented functional and application-level differences.
Technical Context
This device implements a true I²C-compliant two-wire serial interface with SCL/SDA bidirectional signaling, internal address counter for sequential reads, and hardware write protection via the WP pin. Its MONOS-based memory cell architecture enables 1,000k endurance cycles at 25°C and 100-year data retention under same conditions.
The R1EX24008ATAS0I uses device addressing with hardwired A2 (A0/A1 are NC), supports byte and 16-byte page write modes, and features automatic acknowledge polling during internal write cycles. All address pins and WP are internally pulled down, enabling functional operation with floating connections - though external tie-offs are recommended for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 kbit (1024 × 8-bit) - supports firmware parameter storage, calibration tables, and configuration registers in space-constrained systems. |
| Interface | I²C two-wire serial - requires only SCL and open-drain SDA with pull-up resistors; compatible with standard microcontroller I²C peripherals. |
| Max clock frequency | 400 kHz - enables ~100 μs per byte read/write in standard-mode I²C, suitable for non-real-time configuration updates. |
| Supply voltage | 1.8 V to 5.5 V - interoperable across 1.8 V, 3.3 V, and 5 V logic domains without level shifters. |
| Write cycle time | 5 ms max - defines minimum interval between write commands; requires ACK polling or fixed delay before next access. |
| Endurance | 1,000k cycles @25°C - supports frequent recalibration or logging in industrial monitoring nodes over multi-year deployments. |
| Data retention | 100 years @25°C - ensures long-term validity of stored calibration coefficients or security keys without refresh. |
Pinout & Package
Package: 8-pin TSSOP (PTSP0008JC-B / JEITA code TTP-8DAV), 4.4 mm × 3.0 mm footprint, 0.65 mm pitch, lead-free and halogen-free (#S0 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 A0 | No connection | Internally disconnected; must be left unconnected or tied to VSS/VCC - no effect on device operation. |
| 2 A1 | No connection | Internally disconnected; functionally inert; no impact on addressing or memory mapping. |
| 3 A2 | Device address input | Selects one of two possible I²C addresses (1010xxx0/1); tied low by default, enabling base address 0x50 when externally grounded. |
| 4 VSS | Ground reference | Primary return path for all internal circuitry and I/O; requires low-impedance connection to system ground plane. |
| 5 VCC | Power supply | Single 1.8–5.5 V supply; bypass capacitor (0.1 μF ceramic) mandatory between VCC and VSS near the pin. |
| 6 WP | Write protect input | Active-high hardware lock: high = full 8 kbit write protection; low or floating = full read/write access. |
| 7 SCL | Serial clock input | Master-generated clock signal; rise/fall times ≤300 ns required; noise suppression active for pulses <50 ns. |
| 8 SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor; timing referenced to SCL low period for data stability. |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1,000k write cycles and 100-year data retention without wear leveling or refresh circuitry. |
| 16-byte page write | Reduces average write latency by up to 16× versus byte-write mode; ideal for contiguous configuration block updates. |
| 1.8 V operation support | Permits direct integration into ultra-low-power sensor nodes and battery-backed systems without voltage translation. |
| Internal pull-down on A0/A1/A2/WP | Allows functional operation with unconnected address and WP pins - simplifies PCB layout and reduces BOM count. |
| ACK polling support | Enables software-driven wait-for-complete without fixed delays; improves system responsiveness during write-intensive sequences. |
Applications
| Industrial Sensor Calibration | Embedded System Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during power-up initialization and field recalibration events. Use Value: Eliminates need for external calibration jigs; enables field updates via I²C without firmware changes or reprogramming tools. |
Use Scenario: Holding user-defined settings (network IP, display brightness, alarm thresholds) in HVAC control panels. IC Role / Device Role / Timing Role: Persistent configuration store updated infrequently but read on every boot and UI interaction. Use Value: Survives power loss and firmware upgrades; supports >1M setting changes over product lifetime without degradation. |
| Smart Meter Firmware Patch Storage | Medical Device Usage Log |
Use Scenario: Storing small firmware patches or cryptographic signatures for secure over-the-air updates in utility meters. IC Role / Device Role / Timing Role: Secure auxiliary code repository accessed only during authenticated update sequences. Use Value: Enables field correction of minor bugs without full firmware reflashing; leverages WP pin for tamper-resistant patch locking. |
Use Scenario: Recording cumulative operational hours, self-test results, and error counters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Wear-leveling-free event logger with timestamped entries written after each clinical session. Use Value: Meets IEC 62304 traceability requirements; retains 10+ years of usage history even with intermittent battery power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08D-SSHM-T (Microchip) | Same 8 kbit capacity, I²C interface, and TSSOP-8 package; 1 MHz max clock vs. 400 kHz; 400 kcycles endurance. | Higher speed supports faster bulk reads; lower endurance limits use in high-frequency logging scenarios. | Prefer for systems requiring >400 kHz I²C throughput where endurance >400k cycles is not critical. |
| M95080-DRE6TG (STMicroelectronics) | Same 8 kbit, TSSOP-8, and 1.8–5.5 V range; SPI interface instead of I²C; 5 ms write cycle; 1M endurance. | Requires SPI master instead of I²C; incompatible bus protocol prevents drop-in replacement. | Select when board already uses SPI peripherals and higher endurance is prioritized over interface compatibility. |
Compared with R1EX24008ATAS0I, AT24C08D offers higher bandwidth but reduced write endurance, while M95080-DRE6TG trades I²C compatibility for SPI-native operation and extended cycle life - neither is pin- or protocol-compatible, making R1EX24008ATAS0I the optimal choice for I²C-based industrial designs requiring proven 1M-cycle reliability.
Availability
R1EX24008ATAS0I is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, smart meter firmware patching, and medical device usage logging requiring stable component supply across multi-year production cycles.
Supply support for R1EX24008ATAS0I 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, and memory solutions for industrial, automotive, and infrastructure markets.
The R1EX24xxx series targets cost-sensitive, space-constrained embedded systems needing reliable, low-voltage serial EEPROM with extended data retention and industrial temperature tolerance - optimized for calibration, configuration, and event logging roles.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24008ATAS0I?
The R1EX24008ATAS0I supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This allows reliable communication with most microcontrollers without requiring high-speed mode support. The device guarantees timing parameters including tLOW ≥1200 ns and tHIGH ≥600 ns at this rate, and operates across the full 1.8–5.5 V supply range. Exceeding 400 kHz may result in failed ACK or data corruption.
Does the R1EX24008ATAS0I require external pull-up resistors on SDA and SCL lines?
Yes, the R1EX24008ATAS0I requires external pull-up resistors on both SDA and SCL lines because its SDA pin uses an open-drain structure and SCL is a passive input. Recommended values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; Renesas specifies VOL ≤0.4 V at IOL = 3.0 mA (VCC = 2.7–5.5 V), guiding proper resistor selection to meet I²C voltage thresholds.
How does the write protect (WP) pin function on the R1EX24008ATAS0I?
On the R1EX24008ATAS0I, the WP pin is active-high: when driven high (VIH ≥0.7×VCC), it disables all write operations across the full 8 kbit array and returns NO ACK after address transmission. When low or floating (internally pulled down), full read/write access is enabled. This provides hardware-level protection against accidental overwrites during power transitions or firmware faults - a critical feature for calibration-critical systems.
What is the memory organization and addressing scheme of the R1EX24008ATAS0I?
The R1EX24008ATAS0I contains 1024 words of 8-bit memory, organized as a linear 10-bit address space (0x000 to 0x3FF). Device addressing uses the fixed I²C code "1010", followed by A2 (pin 3) as the LSB of the 3-bit device address, and the R/W bit. Memory addressing within the device uses 10 bits (a9–a0), with a9 and a8 mapped to A2 and unconnected A1/A0 respectively - enabling two devices per bus using A2 alone.
Can the R1EX24008ATAS0I operate reliably at 1.8 V supply voltage?
Yes, the R1EX24008ATAS0I is fully specified for 1.8 V operation: DC characteristics include ISB ≤2.0 μA, ICC1 ≤1.0 mA (read), and ICC2 ≤3.0 mA (write) at VCC = 1.8 V. AC timing remains valid down to 1.8 V, with VOL ≤0.2 V at IOL = 1.5 mA. This enables direct interfacing with 1.8 V FPGAs, ultra-low-power MCUs, and battery-powered sensors without level-shifting circuitry.
R1EX24008ATAS0I#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:
- 8Kbit
- Memory Organization:
- 1K 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
R1EX24008ATAS0I#S0 FAQ
1.How can I place an order for R1EX24008ATAS0I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24008ATAS0I#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 R1EX24008ATAS0I#S0 reliable?
The price and inventory of R1EX24008ATAS0I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24008ATAS0I#S0 is usually 5 days.
3.What payment methods are accepted for R1EX24008ATAS0I#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24008ATAS0I#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24008ATAS0I#S0?
R1EX24008ATAS0I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24008ATAS0I#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 R1EX24008ATAS0I#S0?
For technical support, including R1EX24008ATAS0I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24008ATAS0I#S0 requirements.
6.How does Aetrix verify that R1EX24008ATAS0I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX24008ATAS0I#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 R1EX24008ATAS0I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX24008ATAS0I#S0?
All R1EX24008ATAS0I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24008ATAS0I#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 R1EX24008ATAS0I#S0 part is unused and in its original packaging.
Return procedure for R1EX24008ATAS0I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24008ATAS0I#S0 Tags
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