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Renesas R1EX25064ASA00I#S0
- Part No.:
- R1EX25064ASA00I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX25064ASA00I#S0.pdf
- Description:
- IC EEPROM 64KBIT SPI 5MHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
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Product details
Overview
R1EX25064ASA00I#S0 from Renesas Electronics is a 64-kbit SPI serial EEPROM (8-kword × 8-bit) employing MONOS memory technology, operating from 1.8 V to 5.5 V with 5 MHz max clock frequency at ≥2.5 V, 32-byte page write capability, and −40°C to +85°C industrial temperature range-used for firmware parameter storage in embedded control modules.
For engineers reviewing the R1EX25064ASA00I#S0 datasheet, R1EX25064ASA00I#S0 pinout, R1EX25064ASA00I#S0 application, or R1EX25064ASA00I#S0 equivalent, key selection criteria include its 1.8–5.5 V single-supply operation, hardware/software write protection via W and SRWD/BP bits, 100-year data retention, 1M-cycle endurance, and SOP-8 package compatibility with legacy board layouts.
Technical Context
This SPI EEPROM implements Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) interface timing, supports automatic 32-byte page programming, and uses a status register with WIP, WEL, BP1/BP0, and SRWD bits to manage write enable state and block-level memory protection. Its HOLD pin enables communication pause without chip deselection.
The device integrates a high-voltage generator for internal programming, a Y/X decoder with sense amplifier, and serial-parallel conversion logic-all optimized for low-power active (≤3.5 mA write) and ultra-low standby (≤2.0 μA) operation across its full voltage and temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 64 kbit (8,192 × 8-bit), enabling storage of configuration tables or calibration data for mid-complexity microcontrollers |
| Supply voltage range | 1.8 V to 5.5 V - interoperable with both 1.8 V logic systems and legacy 3.3/5 V designs without level shifting |
| Max clock frequency | 5 MHz at VCC ≥2.5 V; 3 MHz at 1.8 V - balances speed and power in battery-powered or noise-sensitive applications |
| Page write size | 32 bytes per write cycle - reduces total programming time vs. byte-write-only devices by up to 32× |
| Endurance & retention | ≥1,000,000 write cycles at 25°C; ≥100 years data retention at 25°C - suitable for infrequently updated but mission-critical settings |
| Operating temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT edge nodes |
| Package | SOP-8 (PRSP0008DF-B / FP-8DBV), 3.9 mm × 4.89 mm, 1.27 mm pitch - compatible with standard reflow and wave-solder processes |
Pinout & Package
8-pin SOP package (PRSP0008DF-B, JEITA code FP-8DBV), 150-mil width, lead-free and halogen-free (#S0 suffix). Pin 1 marked with index dot; pins arranged counterclockwise from top-left (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 1.8–5.5 V; requires local 0.1 μF ceramic bypass capacitor to VSS for noise immunity |
| VSS | Ground reference | System ground return path; must be low-impedance and co-located with VCC bypass cap |
| S (Chip Select) | Active-low device enable | Drives Q to high-Z when high; falling edge initiates instruction decoding; must be stable during VCC ramp |
| C (Serial Clock) | Interface timing master | Controls sampling (rising edge) and output change (falling edge); supports 3/5 MHz operation with defined tCH/tCL |
| D (Data In) | Serial command/address/data input | Latches instruction byte, address, and write data on rising C edge; ignored during HOLD or standby |
| Q (Data Out) | Serial read data output | Shifts stored data on falling C edge; enters high-Z when S high or HOLD active |
| W (Write Protect) | Hardware lock for status register | When low + SRWD=1, disables all status register writes - enables irreversible hardware protection mode |
| HOLD | Communication suspend control | Pauses ongoing SPI transfer without resetting internal state; requires C low to assert/deassert |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory cell technology | Enables 1.8 V operation and >1M endurance without charge-pump degradation seen in floating-gate EEPROMs |
| Hardware + software write protection | Combines W pin + SRWD bit for irreversible lock, plus BP1/BP0 bits for configurable block-level software protection |
| Automatic 32-byte page write | Reduces average write time per byte by eliminating inter-byte delays; supports burst writes within page boundaries |
| Power-on reset (POR) circuit | Prevents spurious writes during VCC ramp by ignoring S transitions until stable supply is detected |
| Hold function with state retention | Allows host MCU to temporarily suspend EEPROM communication (e.g., during ISR execution) without losing transaction context |
| Lead-free & halogen-free construction | Meets RoHS Directive 2011/65/EU and JEDEC JS709C requirements for environmentally compliant manufacturing |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers with field-upgradable firmware. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed via SPI during boot and runtime; retains values across power cycles and brownouts. Use Value: Enables deterministic startup behavior and eliminates need for external backup batteries or supercapacitors. |
Use Scenario: Holding factory-calibrated sensor offsets and gain coefficients in portable diagnostic equipment requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, long-retention memory for FDA/ISO 13485-critical calibration data; write-protected via SRWD+W after initial programming. Use Value: Guarantees data integrity over 10+ years without recalibration, satisfying medical device lifecycle requirements. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving user preferences (mirror position, seat memory), fault logs, and adaptive learning values in 12 V automotive ECUs. IC Role / Device Role / Timing Role: SPI EEPROM interfaced to 3.3 V microcontroller; withstands load-dump transients via robust ESD design and wide VCC range. Use Value: Survives harsh automotive environments while supporting over-the-air update rollback and diagnostics history. |
Use Scenario: Storing tariff schedules, meter ID, cryptographic keys, and tamper-event counters in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Secure nonvolatile storage with hardware write protection (W+SRWD) preventing unauthorized firmware modification. Use Value: Meets ANSI/IEEE 1377 security mandates by ensuring critical configuration remains immutable post-deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit density, quad SPI interface, 85 MHz max clock; no HOLD pin; different status register map | Better suited for high-speed firmware code storage, not parameter EEPROM replacement | Select only if migrating to quad-SPI architecture and requiring >64 kbit capacity |
| M95M02-DRMN6TP/K | 2 Mbit density, same SOP-8 package; 5.5 V max VCC; 5 MHz clock; lacks SRWD/HOLD; BP bits implemented differently | Compatible for basic parameter storage but lacks hardware-locked protection mode | Choose when cost sensitivity outweighs need for irreversible write protection and HOLD functionality |
Compared with AT25DF041A-SSH-T and M95M02-DRMN6TP/K, the R1EX25064ASA00I#S0 delivers unique hardware-enforced write lockdown via W+SRWD, precise 32-byte page write timing, and industrial-grade endurance/reliability in a drop-in SOP-8 footprint-making it optimal for safety- or compliance-critical parameter storage where data immutability is mandatory.
Availability
R1EX25064ASA00I#S0 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic instruments, automotive body control units, and smart energy meters requiring stable component supply across multi-year production lifecycles.
Supply support for R1EX25064ASA00I#S0 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 global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The R1EX25xxx series targets cost-sensitive, reliability-critical embedded systems needing robust, low-voltage SPI EEPROM with advanced data protection-designed specifically for firmware configuration, calibration storage, and event logging in harsh environments.
FAQ
What is the maximum clock frequency supported by R1EX25064ASA00I#S0 at 1.8 V?
The R1EX25064ASA00I#S0 supports up to 3 MHz clock frequency when operated at 1.8 V to 5.5 V supply voltage, as specified in the AC Characteristics table for the 1.8 V condition. This ensures reliable SPI communication in ultra-low-power systems while maintaining timing margins for noise immunity.
Does R1EX25064ASA00I#S0 support both SPI Mode 0 and Mode 3?
Yes, the R1EX25064ASA00I#S0 is explicitly compatible with SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in the Features section of the datasheet. This dual-mode support allows seamless integration with diverse microcontroller SPI peripherals without requiring hardware modifications.
How does the hardware write protection work on R1EX25064ASA00I#S0?
R1EX25064ASA00I#S0 achieves hardware write protection by combining the SRWD bit in the status register with the W pin state: when SRWD=1 and W is driven low, the status register becomes permanently read-only, locking BP1/BP0 bits and disabling WRSR execution-ensuring irreversible protection of protected memory blocks.
What is the page size and write time for R1EX25064ASA00I#S0?
The R1EX25064ASA00I#S0 has a fixed 32-byte page size for automatic page programming, and its typical write cycle time is 5 ms per page, as confirmed in the DC and AC Characteristics sections. This enables efficient bulk writes while maintaining predictable timing for system-level timeout handling.
Is R1EX25064ASA00I#S0 compatible with standard SOP-8 PCB footprints?
Yes, the R1EX25064ASA00I#S0 uses the PRSP0008DF-B package (JEITA code FP-8DBV), a standard 150-mil SOP-8 with 1.27 mm pitch and 3.9 mm × 4.89 mm body dimensions-fully compatible with industry-standard SOP-8 land patterns and assembly processes including reflow and wave soldering.
R1EX25064ASA00I#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:
- 64Kbit
- Memory Organization:
- 8K 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
R1EX25064ASA00I#S0 FAQ
1.How can I place an order for R1EX25064ASA00I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX25064ASA00I#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 R1EX25064ASA00I#S0 reliable?
The price and inventory of R1EX25064ASA00I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX25064ASA00I#S0 is usually 5 days.
3.What payment methods are accepted for R1EX25064ASA00I#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX25064ASA00I#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX25064ASA00I#S0?
R1EX25064ASA00I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX25064ASA00I#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 R1EX25064ASA00I#S0?
For technical support, including R1EX25064ASA00I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX25064ASA00I#S0 requirements.
6.How does Aetrix verify that R1EX25064ASA00I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX25064ASA00I#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 R1EX25064ASA00I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX25064ASA00I#S0?
All R1EX25064ASA00I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX25064ASA00I#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 R1EX25064ASA00I#S0 part is unused and in its original packaging.
Return procedure for R1EX25064ASA00I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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