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Renesas R1EX25002ASA00I#S0
- Part No.:
- R1EX25002ASA00I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX25002ASA00I#S0.pdf
- Description:
- IC EEPROM 2KBIT SPI 5MHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,210
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Product details
Overview
R1EX25002ASA00I from Renesas Electronics is a 2 kbit (256 × 8-bit) Serial Peripheral Interface (SPI) EEPROM featuring MONOS memory technology, 1.8–5.5 V single-supply operation, 5 MHz max clock frequency at ≥2.5 V, and 16-byte page programming for accelerated write cycles. It serves as nonvolatile configuration storage in industrial control modules requiring reliable data retention over decades.
For engineers reviewing the R1EX25002ASA00I datasheet, R1EX25002ASA00I pinout, R1EX25002ASA00I application, or R1EX25002ASA00I equivalent, key selection criteria include SPI mode 0/3 compatibility, −40°C to +85°C operating range, 100-year data retention at 25°C, and SOP-8 package with lead-free finish.
Technical Context
This SPI EEPROM implements a serial interface compliant with SPI modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), supporting dual-voltage timing: 5 MHz operation at 2.5–5.5 V and 3 MHz at 1.8–5.5 V. Its internal architecture includes a high-voltage generator, Y/X decoders, sense amplifier, and serial-parallel converter enabling byte/page read/write via standard SPI command set.
The device integrates hardware write protection (W pin), HOLD functionality for communication pause without chip deselect, and a status register with WIP, WEL, and BP1/BP0 bits for software-controlled block protection. All operations-including WRITE, WRSR, and READ-are initiated by 8-bit opcodes followed by address/data bytes aligned to SPI clock edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 kbit (256 × 8-bit) - supports firmware parameter storage in compact embedded systems |
| Supply voltage | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters |
| Max clock frequency | 5 MHz (at 2.5–5.5 V); 3 MHz (at 1.8–5.5 V) - determines maximum throughput for configuration updates |
| Write endurance | 1,000k cycles @25°C - ensures long-term reliability in field-updatable devices |
| Data retention | 100 years @25°C - guarantees persistent storage of calibration data across product lifetime |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade deployment in harsh environments |
| Page size | 16-byte page programming - reduces write time per byte versus byte-write-only EEPROMs |
Pinout & Package
Package: 150 mil 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), lead-free, tape-and-reel (2,500 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input | Power rail connection for internal logic and memory array; requires 0.1 μF bypass capacitor to VSS |
| VSS | Ground reference | Common return path for all digital and analog circuitry; must be low-impedance |
| S | Chip select | Active-low enable signal; device enters standby when high, active power mode when low |
| C | Serial clock | Timing reference for SPI communication; latches D on rising edge, drives Q on falling edge |
| D | Serial data input | Receives opcodes, addresses, and write data; sampled on rising edge of C |
| Q | Serial data output | Transmits read data and status register contents; driven on falling edge of C |
| W | Write protect | Hardware lock: low disables WRITE/WRSR instructions regardless of WEL state |
| HOLD | Communication hold | Pauses ongoing SPI transfer without resetting internal state; requires S low and C low to activate |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables high endurance (1M cycles) and 100-year data retention while reducing leakage vs. floating-gate EEPROM |
| 16-byte page programming | Reduces typical write time per byte by up to 16× compared to single-byte writes |
| Hardware + software write protection | Combines W pin (immediate disable) and BP1/BP0 bits (configurable protected blocks) for layered security |
| HOLD function | Allows interruption of SPI transfers mid-sequence without losing address pointer or command context |
| Power-on reset circuitry | Prevents unintended writes during VCC ramp-up/down by enforcing stable S and W states |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up and field recalibration routines. Use Value: Ensures measurement accuracy traceability across 10+ year product lifetimes without battery backup. | Use Scenario: Retaining user-defined therapy parameters and safety limits in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for critical operational settings validated before each treatment cycle. Use Value: Meets IEC 62304 Class B software requirements through guaranteed 100-year data integrity at room temperature. |
| Automotive Body Control Module | Smart Energy Metering |
Use Scenario: Saving seat/mirror position presets and lighting profiles in vehicle BCMs across ignition cycles. IC Role / Device Role / Timing Role: Low-power SPI slave storing user preferences with fast read access during wake-up sequences. Use Value: Achieves <2.0 μA standby current to comply with ISO 16750-2 quiescent current limits. | Use Scenario: Logging tariff schedules, demand response events, and meter firmware version history in AMI meters. IC Role / Device Role / Timing Role: High-endurance data logger handling >10k write cycles/year under utility-grade environmental stress. Use Value: Delivers 100k write cycles minimum at 85°C-enabling 10+ years of field operation in hot outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25020B-SSHL-T | 2 kbit SPI EEPROM; 20 MHz max clock; SOIC-8; 1 million write cycles; 100-year retention | Higher speed interface; different AC timing and status register layout | Select when system requires faster read/write throughput and can accommodate revised timing margins |
| M95020-DRMN3TP/K | 2 kbit SPI EEPROM; 10 MHz max clock; TSSOP-8; 4 million write cycles; 40-year retention | Higher endurance but shorter data retention; different HOLD/W pin behavior | Choose for high-cycle-count logging where 40-year retention suffices and TSSOP-8 footprint is preferred |
Compared with AT25020B-SSHL-T and M95020-DRMN3TP/K, the R1EX25002ASA00I provides balanced performance with industry-leading 100-year data retention at 25°C and robust −40°C to +85°C operation, making it optimal for long-lifecycle industrial and medical applications where data integrity outweighs raw speed.
Availability
R1EX25002ASA00I is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy metering requiring stable component supply across extended production runs.
Supply support for R1EX25002ASA00I 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 global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R1EX25xxx Series targets cost-sensitive, space-constrained embedded systems needing reliable nonvolatile storage with ultra-low power consumption and extended data retention-especially where legacy SPI EEPROM interfaces must be maintained.
FAQ
What is the maximum clock frequency supported by the R1EX25002ASA00I?
The R1EX25002ASA00I supports up to 5 MHz clock frequency when operated at 2.5 V to 5.5 V supply, and up to 3 MHz at 1.8 V to 5.5 V. These values are specified across the full −40°C to +85°C operating temperature range and reflect guaranteed timing margins for reliable SPI communication without setup/hold violations.
Does the R1EX25002ASA00I require external pull-up resistors on its SPI pins?
No, the R1EX25002ASA00I does not require external pull-up resistors on S, C, D, or Q pins under normal operation. Its inputs meet standard SPI voltage thresholds (VIH ≥ VCC × 0.7, VIL ≤ VCC × 0.3), and the Q output is actively driven. However, a 0.1 μF bypass capacitor between VCC and VSS is mandatory for noise immunity.
How does the HOLD function operate on the R1EX25002ASA00I?
The HOLD function on the R1EX25002ASA00I pauses ongoing SPI communication without deselecting the chip: it places Q in high-impedance state and ignores D and C transitions. Activation requires S low and HOLD low while C is low; deactivation occurs when HOLD returns high with C still low. This preserves internal address and command state.
What write protection mechanisms does the R1EX25002ASA00I provide?
The R1EX25002ASA00I provides dual-layer write protection: hardware-based via the W pin (low disables all writes immediately), and software-configurable via BP1/BP0 bits in the status register (defining protected memory blocks: none, upper quarter, upper half, or full array). Both mechanisms must be satisfied for a WRITE or WRSR instruction to execute.
Is the R1EX25002ASA00I compatible with SPI mode 1 or mode 2?
No, the R1EX25002ASA00I is explicitly compatible only with SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1), as stated in the datasheet. It does not support mode 1 (CPOL=0, CPHA=1) or mode 2 (CPOL=1, CPHA=0) due to fixed sampling on rising C edge and output on falling C edge.
R1EX25002ASA00I#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 5 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
R1EX25002ASA00I#S0 FAQ
1.How can I place an order for R1EX25002ASA00I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX25002ASA00I#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 R1EX25002ASA00I#S0 reliable?
The price and inventory of R1EX25002ASA00I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX25002ASA00I#S0 is usually 5 days.
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5.How can I obtain technical support or documentation for R1EX25002ASA00I#S0?
For technical support, including R1EX25002ASA00I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX25002ASA00I#S0 requirements.
6.How does Aetrix verify that R1EX25002ASA00I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX25002ASA00I#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 R1EX25002ASA00I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX25002ASA00I#S0?
All R1EX25002ASA00I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX25002ASA00I#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 R1EX25002ASA00I#S0 part is unused and in its original packaging.
Return procedure for R1EX25002ASA00I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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