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Renesas R1EX24128ASA00A#S0
- Part No.:
- R1EX24128ASA00A#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1EX24128ASA00A#S0.pdf
- Description:
- EEPROM, 16KX8, SERIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
R1EX24128ASA00A from Renesas Electronics is a 128-kbit (16,384 × 8-bit) two-wire serial EEPROM with I²C interface, 1.8–5.5 V supply, 400 kHz clock, 64-byte page write, and SOP-8 package. It delivers 1,000k write cycles at 25°C and 100-year data retention for nonvolatile storage in embedded control systems.
For engineers reviewing the R1EX24128ASA00A datasheet, R1EX24128ASA00A pinout, R1EX24128ASA00A application, or R1EX24128ASA00A equivalent, key selection criteria include I²C timing compliance (tLOW ≥ 1200 ns, tHIGH ≥ 600 ns), WP-controlled 16-kbit upper-block protection, standby current ≤ 2 µA, and SOP-8 mechanical compatibility with PRSP0008DF-B footprint.
Technical Context
This device implements a standard I²C-compatible two-wire bus interface with fixed 1010 device code, 3-bit hardware address (A0–A2), and R/W bit. It uses CMOS + MNOS memory technology to achieve low-voltage operation and high reliability without external high-voltage programming circuitry.
Internal architecture includes an 8-bit serial-parallel converter, X/Y decoders, address generator, and high-voltage generator for write/erase. Write operations are internally timed (tWC = 5 ms max), support byte and 64-byte page modes, and use acknowledge polling for completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 kbit (16,384 × 8-bit) - supports firmware parameter storage, calibration data, and configuration registers in resource-constrained systems. |
| Interface | I²C two-wire serial - enables shared bus topology with up to 8 devices using A0–A2 address pins; requires external pull-up resistors on SDA/SCL. |
| Supply voltage | 1.8 V to 5.5 V - interoperable with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Max clock frequency | 400 kHz - compatible with standard-mode I²C controllers; timing margins meet tLOW ≥ 1200 ns and tHIGH ≥ 600 ns. |
| Page write size | 64 bytes per cycle - reduces firmware update time vs. byte-write; address auto-increments within page boundary (a0–a5 bits). |
| Endurance | 1,000,000 cycles @ 25°C - suitable for logging or counter applications with frequent updates. |
| Data retention | 100 years @ 25°C - ensures long-term integrity of stored calibration coefficients or security keys across product lifetime. |
Pinout & Package
Package: 150-mil 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), lead-free, surface-mount, 3.9 mm × 4.89 mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware device address inputs | Set 3-bit slave address (000–111); tied to VSS or VCC to select one of eight devices on same I²C bus. |
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance connection to system ground plane. |
| VCC | Power supply | Single 1.8–5.5 V supply; decoupling capacitor (0.1 µF) required near pin for noise immunity during write cycles. |
| WP | Write protect control | High = protects upper 16 kbit (2048 bytes); low = full read/write access; open-drain compatible with microcontroller GPIO. |
| SCL | Serial clock input | Positive-edge sampled for data input, negative-edge sampled for data output; 400 kHz max; requires external pull-up. |
| SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up; transitions only allowed during SCL low period per I²C spec. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power standby | 2 µA max - enables battery-backed operation in always-on systems such as smart meters or IoT edge nodes. |
| Automatic page write | 64-byte burst capability - cuts firmware update time by ~64× vs. byte-write; eliminates host-side address management overhead. |
| Write cycle time | 5 ms max - deterministic erase/write latency allows precise timeout handling in real-time firmware. |
| Industrial temp range | −40°C to +85°C - validated for operation in automotive cabin modules, industrial PLCs, and outdoor telecom equipment. |
| Lead-free packaging | RoHS-compliant SOP-8 - meets environmental regulations and reflow soldering profiles (J-STD-020, MSL3). |
Applications
| Consumer Audio Calibration | Industrial Sensor Node |
|---|---|
Use Scenario: Storing user EQ settings, speaker impedance compensation, and factory trim values in Bluetooth speakers and soundbars. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed via I²C during power-up or mode change; WP pin prevents accidental overwrite during audio processing. Use Value: Enables consistent acoustic performance across production units and field updates without requiring MCU flash partitioning or external backup power. | Use Scenario: Recording temperature/humidity offset corrections, sensor linearization tables, and node ID in wireless environmental monitors. IC Role / Device Role / Timing Role: Persistent parameter store interfaced to MCU over I²C; page write used during commissioning to load full calibration dataset in one transaction. Use Value: Eliminates need for MCU internal flash wear-leveling; 100-year retention ensures calibration validity over multi-decade deployments. |
| Automotive Body Control Module | Medical Diagnostic Handheld |
Use Scenario: Saving seat/mirror position presets, door lock configuration, and lighting profiles in 12 V automotive subsystems. IC Role / Device Role / Timing Role: I²C EEPROM co-located with MCU; operates across −40°C to +85°C; WP pin hardwired to prevent unintended writes during CAN bus transients. Use Value: Provides reliable, low-cost storage for user preferences without consuming MCU flash endurance or requiring EEPROM emulation software. | Use Scenario: Holding FDA-required device serial numbers, calibration timestamps, and usage counters in portable ECG or pulse oximeters. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element; WP pin enabled during normal operation to block unauthorized parameter modification. Use Value: Meets medical device traceability requirements with 1,000k-cycle endurance and 100-year data retention-no periodic refresh needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C128C-SSHM-T | Same 128 kbit capacity, I²C interface, and SOP-8 package; 1 MHz max clock; 1 µA standby current; 400 kcycles endurance. | Higher speed and lower quiescent current, but reduced endurance and shorter data retention (40 years). | Select when system requires faster writes or ultra-low sleep current, and calibration data update frequency is low. |
| M95128-DRMN6TP/K | 128 kbit SPI interface (not I²C); 5 V tolerant; 10 MHz max clock; SO8N package (same pin count, different pinout). | Requires SPI controller instead of I²C; incompatible bus protocol and pin mapping; no WP pin function. | Choose only if existing design uses SPI peripherals and board layout allows SO8N footprint; not drop-in replaceable. |
Compared with AT24C128C-SSHM-T, R1EX24128ASA00A offers superior endurance and data retention for high-update-rate calibration storage; compared with M95128-DRMN6TP/K, it provides native I²C compatibility and hardware write protection-critical for safety-critical parameter locking.
Availability
R1EX24128ASA00A is available at Aetrix Electronics and suitable for consumer audio calibration, industrial sensor nodes, automotive body control modules, and medical diagnostic handhelds requiring stable component supply and long-term obsolescence planning.
Supply support for R1EX24128ASA00A 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 cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal external components and I²C bus compatibility.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24128ASA00A?
The R1EX24128ASA00A supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. Its AC characteristics guarantee tLOW ≥ 1200 ns and tHIGH ≥ 600 ns under all operating conditions (−40°C to +85°C, 1.8–5.5 V). Exceeding this frequency may cause communication failures or incomplete write cycles in the R1EX24128ASA00A.
How does the WP pin function in the R1EX24128ASA00A?
In the R1EX24128ASA00A, the WP (Write Protect) pin enables hardware-level memory protection: when pulled high, it locks the upper 16 kbit (2048 bytes) of the 128 kbit array; when low, full read/write access is granted. The R1EX24128ASA00A ignores WP state during read operations, ensuring uninterrupted data retrieval regardless of protection status.
What package type is used for the R1EX24128ASA00A?
The R1EX24128ASA00A uses a 150-mil 8-pin plastic SOP package designated PRSP0008DF-B (JEITA code FP-8DBV), with 1.27 mm lead pitch, 3.9 mm × 4.89 mm body dimensions, and Ni/Pd/Au plating. This RoHS-compliant package is compatible with standard reflow soldering profiles and fits common SOP-8 footprints.
Can the R1EX24128ASA00A operate from a 1.8 V supply?
Yes, the R1EX24128ASA00A is fully specified to operate from 1.8 V to 5.5 V. At 1.8 V, it maintains 400 kHz I²C timing compliance, 64-byte page write functionality, and 2 µA max standby current. DC parameters including VOL1 (≤ 0.2 V at IOL = 1.5 mA) and VIH (≥ 1.26 V) are guaranteed across this full voltage range in the R1EX24128ASA00A.
What is the endurance rating of the R1EX24128ASA00A at 85°C?
The R1EX24128ASA00A is rated for 100,000 write/erase cycles at 85°C, as specified in its memory cell characteristics table. This is derated from the 1,000,000-cycle rating at 25°C to account for accelerated oxide degradation at elevated temperature. Data retention at 85°C is guaranteed for 10 years, per the R1EX24128ASA00A datasheet.
R1EX24128ASA00A#S0 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:
- -
R1EX24128ASA00A#S0 FAQ
1.How can I place an order for R1EX24128ASA00A#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24128ASA00A#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 R1EX24128ASA00A#S0 reliable?
The price and inventory of R1EX24128ASA00A#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24128ASA00A#S0 is usually 5 days.
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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 R1EX24128ASA00A#S0?
For technical support, including R1EX24128ASA00A#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24128ASA00A#S0 requirements.
6.How does Aetrix verify that R1EX24128ASA00A#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX24128ASA00A#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 R1EX24128ASA00A#S0 meets industry standards.
7.What is the process for return or replacement of R1EX24128ASA00A#S0?
All R1EX24128ASA00A#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24128ASA00A#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 R1EX24128ASA00A#S0 part is unused and in its original packaging.
Return procedure for R1EX24128ASA00A#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24128ASA00A#S0 Tags
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