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Renesas R1EX25512ASA00I#S0
- Part No.:
- R1EX25512ASA00I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX25512ASA00I#S0.pdf
- Description:
- IC EEPROM 512KBIT 5MHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,492
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Product details
Overview
R1EX25512ASA00I from Renesas Electronics is a 512-kbit (64-Kword × 8-bit) Serial Peripheral Interface (SPI) EEPROM featuring MONOS memory technology, 1.8 V to 5.5 V single-supply operation, and 128-byte page programming. It delivers 3 MHz max clock frequency at 1.8 V–5.5 V, 5 µA max standby current, and operates across −40°C to +85°C - deployed in industrial control modules for nonvolatile parameter storage.
For engineers reviewing the R1EX25512ASA00I datasheet, R1EX25512ASA00I pinout, R1EX25512ASA00I application, or R1EX25512ASA00I equivalent, this page provides verified electrical specs, SOP-8 pin mapping, SPI mode 0/3 compatibility, write-protection logic, and real-world use cases in embedded systems requiring long-term data retention and low-voltage write capability.
Technical Context
This SPI EEPROM implements a serial interface with dual-mode SPI support (mode 0 and mode 3), enabling interoperability with diverse microcontroller host interfaces. Its internal architecture integrates a high-voltage generator, Y/X decoders, sense amplifiers, and serial-parallel conversion logic to manage 65,536 × 8-bit memory array access via chip-select–gated command sequences.
It supports hardware- and software-based protection schemes: Block Protect (BP0/BP1) bits define protected memory regions (none, upper quarter, upper half, or full array), while Status Register Write Disable (SRWD) combined with the W pin enables Hardware Protected Mode - freezing BP/SRWD bits when W is driven low and SRWD = 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 512 kbit (65,536 × 8-bit); sufficient for firmware configuration tables, calibration data, or device identity storage in space-constrained designs. |
| Supply voltage range | 1.8 V to 5.5 V; enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level-shifting. |
| Max clock frequency | 3 MHz at 1.8 V–5.5 V (5 MHz at 2.5 V–5.5 V); determines maximum sequential read/write throughput in host-controlled SPI transactions. |
| Page write size | 128 bytes per page; reduces total write cycles needed for bulk updates - e.g., writing 256 bytes requires only two self-timed 5 ms writes instead of 256 byte-level operations. |
| Endurance & retention | 1,000k write/erase cycles at 25°C; 100-year data retention at 25°C - validated for mission-critical logging and infrequently updated system parameters. |
| Operating temperature | −40°C to +85°C; qualified for industrial-grade deployment in programmable logic controllers, sensor transmitters, and motor drives. |
| Package | SOP-8 (PRSP0008DF-B / FP-8DBV); 3.9 mm × 4.89 mm footprint with 1.27 mm pitch - compatible with standard reflow and automated optical inspection processes. |
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 | Power supply input | Accepts 1.8–5.5 V; must be stable before asserting S; power-on reset requires monotonic ramp ≤2 µs/V. |
| VSS | Ground reference | System ground return; tied to PCB ground plane; required for valid VIH/VIL thresholds and leakage current compliance. |
| S (Chip Select) | Device enable control | Active-low selection signal; falling edge initiates instruction decode; must remain low during multi-byte transfers. |
| C (Serial Clock) | Interface timing reference | Drives synchronous data latching on rising edge (D) and output shifting on falling edge (Q); supports 3/5 MHz operation. |
| D (Data In) | Serial command/address/data input | Latches instruction opcodes (e.g., 0x06 for WREN), 16-bit addresses, and write data on C's rising edge. |
| Q (Data Out) | Serial data output | Shifts out read data, status register contents, or dummy bytes on C's falling edge; high-impedance when S = high or HOLD active. |
| W (Write Protect) | Hardware lock control | When low + SRWD = 1, enters Hardware Protected Mode - prevents all status register writes and enforces BP bit immutability. |
| HOLD | Communication pause | Halts ongoing SPI transfer without deselecting device; Q goes high-Z; C/D ignored until HOLD returns low synchronized with C low. |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1,000k endurance and 100-year data retention at 25°C - superior to floating-gate EEPROM in reliability-critical applications. |
| 128-byte page programming | Reduces average write time by >95% vs. byte-write mode; accelerates firmware update or calibration table reload in field-deployed devices. |
| Dual SPI mode support | Operates in SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1) - ensures compatibility with ARM Cortex-M, PIC, and legacy 8051 hosts. |
| Hardware + software protection | Combines W pin + SRWD bit for irreversible lock, plus BP0/BP1 bits for configurable software write-protection zones - meets IEC 62443 secure boot requirements. |
| Low-power standby | 5 µA max ICC in standby (S = VCC); extends battery life in energy-harvesting sensors and portable diagnostic tools. |
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 no external backup power. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via SPI during boot and runtime reconfiguration; retains values across 100k+ power cycles. Use Value: Eliminates need for supercapacitor-backed SRAM; guarantees parameter persistence after unexpected AC loss or brownout events. |
Use Scenario: Holding factory-calibrated sensor offsets and gain coefficients in portable ultrasound probes and infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for FDA-required calibration records; accessed only during device initialization or service mode. Use Value: Meets 21 CFR Part 11 audit trail requirements via hardware-enforced write protection (W + SRWD) and 100-year retention. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12 V automotive body control units. IC Role / Device Role / Timing Role: SPI slave storing user preferences; withstands load-dump transients and cold-crank conditions down to −40°C. Use Value: Qualified for AEC-Q100 Class 3 (−40°C to +85°C); 1.8 V operation supports low-quiescent LDOs in always-on domains. |
Use Scenario: Retaining tariff schedules, pulse-count scaling factors, and communication protocol settings in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-evident configuration store; BP bits protect critical billing parameters from accidental overwrites during firmware upgrades. Use Value: Enables field-upgradable metering logic while preserving revenue-critical calibration constants - certified for ANSI C12.19 Annex B security. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF512C-SSH-T | 512 kbit SPI flash (not EEPROM); sector erase required before write; no built-in write protection bits. | Requires host-side wear leveling and erase management; unsuitable for frequent single-byte updates. | Select only if cost-sensitive and write patterns are infrequent block updates - not drop-in replacement. |
| M95512-DRMN6TP/K | 512 kbit SPI EEPROM; same 1.8–5.5 V range and SOP-8 package; but only supports SPI mode 0, no mode 3. | Lacks compatibility with hosts requiring mode 3 timing; identical endurance (1M cycles) and retention (40 years @85°C). | Valid alternative if host MCU uses only SPI mode 0; verify HOLD/W pin behavior matches application timing constraints. |
Compared with AT25DF512C-SSH-T and M95512-DRMN6TP/K, R1EX25512ASA00I uniquely combines mode-0/3 flexibility, hardware-locked status register, and MONOS-based 100-year retention - making it optimal for safety-critical, long-lifecycle industrial systems where write atomicity and protection granularity matter.
Availability
R1EX25512ASA00I is available at Aetrix Electronics and suitable for industrial PLCs, medical calibration systems, automotive body controllers, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for R1EX25512ASA00I 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 high-reliability embedded systems needing robust, low-voltage serial EEPROM with advanced data protection - designed specifically for applications where firmware integrity and parameter persistence are non-negotiable.
FAQ
What is the maximum clock frequency supported by R1EX25512ASA00I at 1.8 V?
R1EX25512ASA00I supports up to 3 MHz at 1.8 V to 5.5 V supply voltage, as specified in the AC Characteristics table for the −40°C to +85°C operating range. This is lower than its 5 MHz rating at 2.5 V–5.5 V to ensure timing margin under low-voltage conditions. The device automatically adapts to the applied VCC without configuration.
Does R1EX25512ASA00I support both SPI mode 0 and mode 3?
Yes, R1EX25512ASA00I explicitly supports 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 capability allows seamless integration with diverse host MCUs including those with fixed SPI polarity/phase settings.
How does the Hardware Protected Mode work on R1EX25512ASA00I?
R1EX25512ASA00I enters Hardware Protected Mode when the Status Register Write Disable (SRWD) bit is set to 1 and the W pin is driven low. In this mode, BP0, BP1, and SRWD become read-only, and WRSR instructions are rejected - preventing unauthorized modification of protection settings even if WEL is set.
What is the page size and write cycle time for R1EX25512ASA00I?
R1EX25512ASA00I has a fixed 128-byte page size and a maximum write cycle time of 5 ms per page. This applies to both single-byte and multi-byte writes within the same page boundary; exceeding the page boundary wraps to the start of the page and overwrites prior data.
Is R1EX25512ASA00I pin-compatible with R1EX25512ATA00I?
No, R1EX25512ASA00I (SOP-8) and R1EX25512ATA00I (TSSOP-8) share identical electrical functionality and pinout assignment but differ in physical package dimensions and pitch - SOP-8 uses 1.27 mm pitch while TSSOP-8 uses 0.65 mm pitch. PCB layout and reflow profiles are not interchangeable.
R1EX25512ASA00I#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- R1EX25xxx
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 5 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 60 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
R1EX25512ASA00I#S0 FAQ
1.How can I place an order for R1EX25512ASA00I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX25512ASA00I#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 R1EX25512ASA00I#S0 reliable?
The price and inventory of R1EX25512ASA00I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX25512ASA00I#S0 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX25512ASA00I#S0 transactions.
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R1EX25512ASA00I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX25512ASA00I#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 R1EX25512ASA00I#S0?
For technical support, including R1EX25512ASA00I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX25512ASA00I#S0 requirements.
6.How does Aetrix verify that R1EX25512ASA00I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX25512ASA00I#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 R1EX25512ASA00I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX25512ASA00I#S0?
All R1EX25512ASA00I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX25512ASA00I#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 R1EX25512ASA00I#S0 part is unused and in its original packaging.
Return procedure for R1EX25512ASA00I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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