My Inquiry
My Account
Renesas R1EX24128BTAS0I#S0
- Part No.:
- R1EX24128BTAS0I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R1EX24128BTAS0I#S0.pdf
- Description:
- IC EEPROM 128KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R1EX24128BTAS0I from Renesas Electronics is a 128-kbit (16,384 × 8-bit) two-wire serial EEPROM with I²C interface, 400 kHz clock support, 1.8–5.5 V single-supply operation, and TSSOP-8 packaging. It delivers high reliability via MONOS memory technology, supports 64-byte page writes, and operates across −40°C to +85°C for industrial embedded systems requiring nonvolatile parameter storage.
For engineers reviewing the R1EX24128BTAS0I datasheet, R1EX24128BTAS0I pinout, R1EX24128BTAS0I application, or R1EX24128BTAS0I equivalent, key selection considerations include its 5 ms write cycle time, 1,000k endurance, 100-year data retention, WP pin-based hardware write protection, and compatibility with standard I²C bus timing at 400 kHz.
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 eight devices on one bus. Its internal architecture includes a high-voltage generator, address/data latches, and a serial-parallel converter optimized for low-power read/write cycles.
Write operations support both byte and 64-byte page modes, with automatic address incrementing within pages and rollover behavior at page boundaries. Acknowledge polling enables host firmware to detect write completion without fixed delay timing, while the WP pin provides hardware-level protection against accidental writes when driven high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 kbit (16,384 × 8-bit) - sufficient for storing configuration tables, calibration data, or firmware metadata in resource-constrained systems. |
| Interface | I²C two-wire serial - compatible with standard microcontroller I²C peripherals without additional protocol translation logic. |
| Max clock frequency | 400 kHz - supports fast parameter loading while maintaining noise immunity and signal integrity on shared buses. |
| Write cycle time | 5 ms max - defines minimum interval between write commands; critical for real-time logging or state capture applications. |
| Endurance | 1,000,000 write/erase cycles - ensures long-term reliability in systems performing frequent updates (e.g., metering, diagnostics). |
| Data retention | 100 years min - guarantees persistent storage of critical settings across product lifetime without refresh. |
| Supply voltage | 1.8 V to 5.5 V - enables direct integration with 1.8 V, 3.3 V, and 5 V logic domains without level-shifting circuitry. |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade operation in automotive ECUs, PLCs, and network infrastructure equipment. |
Pinout & Package
Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm body, 0.65 mm lead pitch, Ni/Pd/Au plating, lead-free and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device address inputs | Hard-wired to VCC/VSS to select one of eight possible I²C addresses; internally pulled down, so floating defaults to "0". |
| VSS | Ground reference | Primary return path for all internal circuits; must be low-impedance and decoupled near device. |
| VCC | Power supply | Accepts 1.8–5.5 V; requires 0.1 µF ceramic bypass capacitor placed adjacent to pin per noise suppression guidelines. |
| WP | Write protect control | Active-high hardware lock: drives high to disable all writes; not internally pulled, so must be actively driven or tied. |
| SCL | Serial clock input | Open-drain compatible; hosts must provide pull-up; timing-critical for I²C compliance (tLOW ≥1200 ns, tHIGH ≥600 ns). |
| 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 |
|---|---|
| MONOS memory technology | Enables 100-year data retention and 1M-cycle endurance without wear leveling firmware overhead. |
| 64-byte page write | Reduces firmware latency by up to 64× vs. byte-write mode when updating contiguous configuration blocks. |
| Hardware write protection (WP) | Prevents corruption during power transients or software faults-no software driver dependency required. |
| Low-power standby current | 1.0 µA typical at 3.3 V - extends battery life in always-on sensor nodes or backup memory applications. |
| I²C bus noise suppression | Filters glitches <100 ns wide - improves robustness in electrically noisy industrial environments. |
Applications
| Industrial PLC Configuration Storage | Automotive ECU Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed infrequently during commissioning or maintenance; retains values across power cycles. Use Value: Eliminates need for battery-backed SRAM; withstands 85°C ambient and repeated field updates over 10+ year service life. | Use Scenario: Holding engine calibration maps, sensor offset corrections, and diagnostic trouble code history in engine control units. IC Role / Device Role / Timing Role: Secure, write-protected storage for safety-critical tuning data; accessed during boot or reprogramming via CAN bootloader. Use Value: WP pin prevents unintended writes during CAN bus noise events; 1.8 V operation supports low-voltage microcontrollers in start-stop systems. |
| Smart Meter Firmware Metadata | Network Equipment Bootloader Settings |
Use Scenario: Recording firmware version, cryptographic keys, and tamper-event logs in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Trusted storage for security-critical metadata; updated only during authenticated firmware upgrades. Use Value: 100-year retention ensures data validity over meter lifetime; 400 kHz I²C allows rapid key loading during secure boot. | Use Scenario: Storing MAC address, PHY configuration, and failover policy in managed Ethernet switches and routers. IC Role / Device Role / Timing Role: Persistent configuration store initialized once at manufacturing and rarely modified in field. Use Value: TSSOP-8 package fits dense PCB layouts; 5.5 V tolerance accommodates legacy 5 V management interfaces without regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C128C-SSHL-T (Microchip) | Same 128 kbit I²C EEPROM, but rated for 1 MHz max clock and uses different internal memory architecture (floating-gate). | Higher speed may benefit burst-read applications; lacks MONOS-specific radiation tolerance claims. | Select if 1 MHz operation is required and MONOS-specific retention/endurance margins are not mandated. |
| BR24G128FJ-WE2 (ROHM) | 128 kbit I²C EEPROM with identical 400 kHz max clock, 1.7–5.5 V range, and TSSOP-8 package; specifies 400 kcycles endurance (vs. 1M). | Lower endurance rating limits suitability for high-write-frequency use cases like real-time logging. | Choose for cost-sensitive designs where 400 kcycle endurance suffices and ROHM's supply chain alignment is preferred. |
Compared with AT24C128C-SSHL-T and BR24G128FJ-WE2, the R1EX24128BTAS0I offers superior endurance (1M vs. 400k/1M) and proven MONOS-based data retention, making it optimal for long-life industrial deployments where write frequency and archival integrity are critical.
Availability
R1EX24128BTAS0I is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, smart meters, and network equipment requiring stable component supply, extended temperature operation, and guaranteed long-term data integrity.
Supply support for R1EX24128BTAS0I 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 power devices for industrial, automotive, and infrastructure markets.
The R1EX24xxx series was designed specifically for high-reliability, low-power nonvolatile storage in harsh-environment applications where data integrity over decades is mandatory.
FAQ
What is the maximum I²C clock frequency supported by the R1EX24128BTAS0I?
The R1EX24128BTAS0I 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). Exceeding this frequency may result in timing violations, failed acknowledge pulses, or corrupted data transfers. The R1EX24128BTAS0I does not support Fast Mode (1 MHz) or higher I²C speeds.
Does the R1EX24128BTAS0I require external pull-up resistors on SDA and SCL lines?
Yes, the R1EX24128BTAS0I requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain output drivers. The datasheet specifies that SDA transitions must occur only during SCL low periods and that VOL must remain ≤0.4 V at IOL = 3.0 mA. Proper resistor selection depends on bus capacitance, desired rise time, and supply voltage; typical values range from 2.2 kΩ to 10 kΩ for 3.3 V systems. The R1EX24128BTAS0I itself does not integrate internal pull-ups.
How does the Write Protect (WP) pin function on the R1EX24128BTAS0I?
On the R1EX24128BTAS0I, the WP pin is an active-high hardware write protection input. When WP is driven high (VIH ≥ 0.7 × VCC), all write operations-including byte and page writes-are disabled, and the device responds with a NO ACK ('1') after receiving write data. When WP is low (VIL ≤ 0.3 × VCC), normal read/write operation is enabled. The WP pin is not internally pulled, so it must be actively driven or tied to VSS/VCC-floating is prohibited per the datasheet.
What is the guaranteed data retention period for the R1EX24128BTAS0I?
The R1EX24128BTAS0I guarantees a minimum data retention period of 100 years under specified operating conditions (VCC = 1.8 V to 5.5 V, Ta = −40°C to +85°C). This specification is based on MONOS memory cell characterization and is not 100% tested per unit but statistically validated per JEDEC standards. Retention remains valid even after 1,000,000 write cycles, provided the device operates within its absolute maximum ratings and environmental specifications throughout its lifetime.
Can the R1EX24128BTAS0I operate from a 1.8 V supply?
Yes, the R1EX24128BTAS0I is fully specified to operate from a 1.8 V supply, with all DC and AC parameters-including 400 kHz I²C timing, 5 ms write cycle time, and 1.0 µA standby current-guaranteed at VCC = 1.8 V. Its 1.8–5.5 V operating range allows direct interfacing with modern ultra-low-power microcontrollers and SoCs without level-shifting circuitry, making the R1EX24128BTAS0I suitable for battery-powered and energy-harvesting applications.
R1EX24128BTAS0I#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:
- 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
R1EX24128BTAS0I#S0 FAQ
1.How can I place an order for R1EX24128BTAS0I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24128BTAS0I#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 R1EX24128BTAS0I#S0 reliable?
The price and inventory of R1EX24128BTAS0I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24128BTAS0I#S0 is usually 5 days.
3.What payment methods are accepted for R1EX24128BTAS0I#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24128BTAS0I#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24128BTAS0I#S0?
R1EX24128BTAS0I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24128BTAS0I#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 R1EX24128BTAS0I#S0?
For technical support, including R1EX24128BTAS0I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24128BTAS0I#S0 requirements.
6.How does Aetrix verify that R1EX24128BTAS0I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX24128BTAS0I#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 R1EX24128BTAS0I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX24128BTAS0I#S0?
All R1EX24128BTAS0I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24128BTAS0I#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 R1EX24128BTAS0I#S0 part is unused and in its original packaging.
Return procedure for R1EX24128BTAS0I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24128BTAS0I#S0 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
