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Renesas R1EX24128BTAS0A#S0
- Part No.:
- R1EX24128BTAS0A#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R1EX24128BTAS0A#S0.pdf
- Description:
- IC EEPROM 128KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:17,840
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Product details
Overview
R1EX24128BTAS0A from Renesas Electronics is a 128-kbit (16,384 × 8-bit) two-wire serial EEPROM with I²C interface, operating from 1.8 V to 5.5 V and supporting 400 kHz clock frequency. It features 64-byte page write capability, 1,000k write endurance at 25°C, and 100-year data retention - deployed in consumer electronics for configuration storage, calibration data logging, and firmware parameter backup.
For engineers reviewing the R1EX24128BTAS0A datasheet, R1EX24128BTAS0A pinout, R1EX24128BTAS0A application, or R1EX24128BTAS0A equivalent, key selection considerations include TSSOP-8 package compatibility, WP-enabled hardware write protection, I²C timing compliance at 400 kHz, and low-power operation (2 µA standby) in space-constrained embedded systems.
Technical Context
This device implements a MONOS-based nonvolatile memory array controlled via standard I²C protocol (7-bit address + R/W bit), with hardwired A0–A2 pins enabling up to eight devices on one bus. Its internal address counter supports current-address, random, and sequential read modes without external address latching.
The R1EX24128BTAS0A integrates a high-voltage generator for programming, automatic page-write logic limiting writes to 64-byte boundaries, and noise suppression circuitry rejecting transients <100 ns. Write protection is implemented via dedicated WP pin asserting full-array lock when driven high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 kbit (16,384 × 8-bit) - sufficient for storing boot configuration, sensor calibration tables, or user preferences in compact devices |
| Interface | Two-wire I²C serial bus - enables simple 2-pin connection to microcontrollers without address/data bus overhead |
| Max clock frequency | 400 kHz - supports fast parameter updates while maintaining compatibility with legacy I²C peripherals |
| Write cycle time | 5 ms max - defines minimum interval between write commands; critical for real-time logging applications |
| Endurance | 1,000,000 cycles @ 25°C - ensures reliable operation over product lifetime in frequently updated settings like metering or diagnostics |
| Data retention | 100 years @ 25°C - guarantees long-term integrity of stored calibration or security keys without refresh |
| Supply voltage | 1.8 V to 5.5 V - allows direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level-shifting |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade deployment in consumer and embedded equipment environments |
Pinout & Package
Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm body, 0.65 mm pitch, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device address input | Hardwired to VCC/VSS to select one of eight possible I²C addresses (1010xxxR/W); enables multi-device bus topology |
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance and decoupled near VCC pin |
| VCC | Power supply | Single 1.8–5.5 V supply powering memory array, control logic, and I/O buffers |
| WP | Write protect control | Active-high signal disabling all write operations (byte/page) when asserted; prevents accidental overwrites during power transitions |
| SCL | Serial clock input | Asynchronous master-generated clock synchronizing all I²C transactions; max 400 kHz, edge-triggered |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; carries device address, memory address, and data bytes |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1,000k endurance and 100-year data retention without charge-pump wear-out mechanisms common in floating-gate EEPROMs |
| 64-byte page write | Reduces average write latency by up to 64× vs. byte-write mode - critical for burst logging of sensor arrays or firmware patches |
| Hardware write protection | WP pin provides deterministic, glitch-immune lockout of memory writes independent of software state or I²C bus activity |
| Low-power operation | 2 µA max standby current minimizes battery drain in always-on IoT nodes or portable medical devices |
| I²C timing compliance | Fully meets standard-mode I²C AC specs (tLOW ≥1200 ns, tHIGH ≥600 ns, tSU.STA ≥600 ns) across full voltage/temperature range |
| Noise suppression | Internal filtering rejects SCL/SDA transients <100 ns - improves robustness in electrically noisy industrial enclosures |
Applications
| Consumer Audio Device | Smart Home Sensor Hub |
|---|---|
Use Scenario: Storing user EQ presets, volume history, and Bluetooth pairing information in wireless speakers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed via I²C during boot and runtime; no timing-critical interrupt handling required. Use Value: Enables persistent personalization across power cycles using only two MCU GPIOs and minimal PCB area (TSSOP-8 footprint). |
Use Scenario: Retaining calibrated offset/gain values for temperature/humidity sensors and last-reported network credentials. IC Role / Device Role / Timing Role: Parameter backup memory written infrequently but read at every sensor sampling cycle; operates within I²C standard-mode timing budget. Use Value: Eliminates need for MCU internal flash wear-leveling; 100-year retention ensures field-deployed units retain calibration for full service life. |
| Industrial PLC I/O Module | Medical Diagnostic Handheld |
Use Scenario: Saving module identification, channel scaling factors, and fault log history in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to ARM Cortex-M host; WP pin tied to system enable rail for hardware-enforced write lock during operation. Use Value: Supports −40°C to +85°C operation and 1,000k endurance - withstands repeated firmware updates and field recalibration without degradation. |
Use Scenario: Securing device serial number, calibration coefficients, and usage counters in FDA-classified diagnostic tools. IC Role / Device Role / Timing Role: Trusted parameter store accessed during power-on self-test; write-protected during clinical operation via WP assertion. Use Value: Meets IEC 62304 data integrity requirements through deterministic write-disable behavior and 100-year retention under shelf-life conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C128C-SSHL-T (Microchip) | Same 128-kbit capacity, I²C interface, and TSSOP-8 package; rated for 1 MHz clock (vs. 400 kHz), 200k endurance | Higher speed suits burst-read applications; lower endurance limits frequent reprogramming in calibration-heavy use cases | Select if system requires >400 kHz I²C throughput and endurance >200k cycles is acceptable |
| M95128-DFMN6TP (STMicroelectronics) | Identical 128-kbit size and TSSOP-8 package; SPI interface (not I²C); 5 ms write time; 400 kHz SPI clock max | Requires SPI-capable MCU; incompatible with existing I²C firmware stack without driver rewrite | Choose only when migrating to SPI architecture or when ST's automotive qualification (AEC-Q100 Grade 2) is mandatory |
Compared with AT24C128C-SSHL-T and M95128-DFMN6TP, the R1EX24128BTAS0A offers superior endurance (1M vs. 200k cycles) and native I²C compatibility without interface translation, making it optimal for long-life, low-update-rate configuration storage in cost-sensitive consumer and industrial designs.
Availability
R1EX24128BTAS0A is available at Aetrix Electronics and suitable for consumer audio devices, smart home sensor hubs, industrial PLC I/O modules, and medical diagnostic handhelds requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term data integrity.
Supply support for R1EX24128BTAS0A 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, I²C-compatible nonvolatile storage in space-constrained consumer electronics - emphasizing MONOS-based endurance, wide voltage operation, and hardware write protection.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24128BTAS0A?
The R1EX24128BTAS0A supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This is confirmed in the AC Characteristics table (Page 3 of R10DS0006EJ0100 Rev.1.00), where fSCL is specified as 400 kHz max across −40°C to +85°C and 1.8 V to 5.5 V supply. Exceeding this frequency may cause timing violations and data corruption.
Does the R1EX24128BTAS0A support page write, and what is the page size?
Yes, the R1EX24128BTAS0A supports page write with a fixed page size of 64 bytes, as documented in the Features section (Page 1) and Page Write Operation diagram (Page 9). This allows up to 64 consecutive bytes to be written in a single I²C transaction, reducing total write time versus individual byte writes - a key efficiency feature for bulk parameter updates.
How does the Write Protect (WP) pin function on the R1EX24128BTAS0A?
When the WP pin is driven high (VIH), the R1EX24128BTAS0A disables all write operations - including byte and page writes - across the full 128-kbit memory array. As stated on Page 6, acknowledgment "1" (NO ACK) is returned after write data input, preventing unintended modifications during power-up/down or system faults. WP low enables normal read/write functionality.
What is the data retention specification for the R1EX24128BTAS0A at 85°C?
Per the Memory cell characteristics table (Page 3), the R1EX24128BTAS0A guarantees a minimum data retention of 10 years at 85°C. At 25°C, retention extends to 100 years. These values are measured under specified VCC conditions (1.8 V to 5.5 V) and are not 100% tested - consistent with industry-standard EEPROM qualification practices.
Is the R1EX24128BTAS0A pin-compatible with the SOP-8 variant R1EX24128BSAS0A?
No, the R1EX24128BTAS0A (TSSOP-8) and R1EX24128BSAS0A (SOP-8) share identical electrical functionality and pin functions but differ physically: TSSOP-8 has 0.65 mm pitch and 4.4 mm × 3.0 mm body, while SOP-8 uses 1.27 mm pitch and 4.89 mm × 3.9 mm body. PCB layout and reflow profiles must be redesigned for interchange - they are functionally equivalent but not mechanically pin-compatible.
R1EX24128BTAS0A#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 128Kbit
- Memory Organization:
- 16K 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
R1EX24128BTAS0A#S0 FAQ
1.How can I place an order for R1EX24128BTAS0A#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24128BTAS0A#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 R1EX24128BTAS0A#S0 reliable?
The price and inventory of R1EX24128BTAS0A#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24128BTAS0A#S0 is usually 5 days.
3.What payment methods are accepted for R1EX24128BTAS0A#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24128BTAS0A#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24128BTAS0A#S0?
R1EX24128BTAS0A#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24128BTAS0A#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 R1EX24128BTAS0A#S0?
For technical support, including R1EX24128BTAS0A#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24128BTAS0A#S0 requirements.
6.How does Aetrix verify that R1EX24128BTAS0A#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX24128BTAS0A#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 R1EX24128BTAS0A#S0 meets industry standards.
7.What is the process for return or replacement of R1EX24128BTAS0A#S0?
All R1EX24128BTAS0A#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24128BTAS0A#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 R1EX24128BTAS0A#S0 part is unused and in its original packaging.
Return procedure for R1EX24128BTAS0A#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24128BTAS0A#S0 Tags
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AT24C02C-XHM-T
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