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Renesas R1EX25512ASA00A#S0
- Part No.:
- R1EX25512ASA00A#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1EX25512ASA00A#S0.pdf
- Description:
- EEPROM, 64KX8, SERIAL
- Quantity:
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Inventory:7,133
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Product details
Overview
R1EX25512ASA00A 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 5 MHz max clock frequency at 2.5–5.5 V. It delivers 128-byte page programming, 1,000k write endurance at 25 °C, and 100-year data retention - deployed in consumer electronics for firmware storage, calibration data, and configuration settings.
For engineers reviewing the R1EX25512ASA00A datasheet, R1EX25512ASA00A pinout, R1EX25512ASA00A application, or R1EX25512ASA00A equivalent, this page provides verified electrical specs, SOP-8 pin mapping, SPI mode 0/3 compatibility, hardware/software write protection logic, and real-world use cases in power-sensitive embedded systems.
Technical Context
This SPI EEPROM implements a serial interface with dual-mode SPI compatibility (mode 0 and mode 3), supporting both 5 MHz (2.5–5.5 V) and 3 MHz (1.8–5.5 V) operation. Its internal architecture includes a high-voltage generator, Y/X decoders, sense amplifiers, and serial-parallel conversion logic - all optimized for low-power active and standby states.
The device integrates a status register with non-volatile BP0/BP1 block protect bits, SRWD bit, WEL latch, and WIP flag - enabling flexible software- and hardware-based memory protection. Write operations are self-timed (≤5 ms), with automatic page write capability across 128-byte boundaries and robust immunity to unintended writes during VCC ramp-up/down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (65,536 × 8-bit), sufficient for full bootloader or multi-parameter configuration tables |
| Supply voltage | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V microcontrollers without level shifters |
| Max clock frequency | 5 MHz at 2.5–5.5 V - enables fast read/write cycles in time-critical firmware update paths |
| Page write size | 128 bytes - reduces total write time vs. byte-wise programming; aligns with typical MCU flash sector sizes |
| Endurance & retention | 1,000k cycles @25 °C / 100 years data retention - meets long-life requirements for industrial metering and medical devices |
| Operating temperature | −40 °C to +85 °C - qualified for extended commercial and industrial ambient environments |
| Power consumption | 5 µA max standby current - critical for battery-backed systems and always-on IoT edge nodes |
Pinout & Package
Package: 8-pin SOP (PRSP0008DF-B / FP-8DBV), 3.9 mm × 4.89 mm body, 1.27 mm pitch, lead-free, JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input | Single 1.8–5.5 V rail powers core logic and memory array; decoupling capacitor required near pin |
| VSS | Ground reference | Return path for all internal currents; must be low-impedance connection to system GND plane |
| S (Chip Select) | Device enable control | Active-low signal initiates SPI communication; high-Z output when deasserted; requires clean edge to avoid spurious reads/writes |
| C (Serial Clock) | Interface timing reference | Drives synchronous data transfer; rising edge latches input (D), falling edge outputs data (Q); supports 5 MHz max |
| D (Data In) | Serial command/address/data input | Receives instruction opcodes (e.g., 0x02 for WRITE), 16-bit addresses, and payload bytes on C's rising edge |
| Q (Data Out) | Serial data output | Transfers status register contents or memory data on C's falling edge; tri-states when S is high or HOLD is active |
| W (Write Protect) | Hardware lock control | When low + SRWD=1, enters Hardware Protected Mode - blocks all status register writes and enforces BP-bit protection permanently |
| HOLD | Communication pause | Halts ongoing SPI transaction without deselecting device; Q goes high-Z, D/C ignored; resumes on HOLD high + C low |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables ultra-low power operation and high reliability vs. floating-gate EEPROMs, especially at 1.8 V supply |
| 128-byte page programming | Reduces average write time by >90% compared to byte-write mode - critical for rapid field updates |
| Dual SPI modes (0 and 3) | Ensures interoperability with diverse host MCUs (e.g., STM32, PIC, NXP Kinetis) without firmware rework |
| Hardware + software write protection | Combines SRWD/W pin control with BP0/BP1 status register bits to prevent accidental or malicious firmware corruption |
| Power-on reset immunity | Prevents unintended writes during VCC ramp-up via internal POR circuit - eliminates need for external reset supervisors |
Applications
| Consumer Audio Configuration Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing user EQ presets, volume limits, and Bluetooth pairing keys in portable speakers and headphones. IC Role / Device Role / Timing Role: Non-volatile configuration register accessed via SPI during boot and runtime; holds persistent settings across power cycles. Use Value: Enables zero-latency recall of audio profiles using 1.8 V I/O compatibility and <5 µA standby draw - extends battery life in USB-C powered devices. | Use Scenario: Retaining factory-trimmed offset/gain coefficients and linearization tables for temperature/humidity sensors in HVAC controllers. IC Role / Device Role / Timing Role: Calibration data repository written once during production test and read-only during field operation; accessed via SPI during sensor initialization. Use Value: Guarantees ±0.1% measurement accuracy over 10+ years using 100-year data retention and 1,000k-cycle endurance for re-trim events. |
| Smart Meter Firmware Parameter Table | Medical Infusion Pump Safety Settings |
Use Scenario: Holding tariff schedules, demand-response thresholds, and communication protocol parameters in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure parameter store with hardware write protection (W + SRWD) preventing tampering during AMI network updates. Use Value: Meets IEC 62056-21 security requirements via dual-layer protection - BP bits lock critical registers while W pin disables status register writes. | Use Scenario: Storing drug library limits, dose safety interlocks, and alarm thresholds in FDA Class II infusion pumps. IC Role / Device Role / Timing Role: Fail-safe configuration memory with power-loss write abort detection (WIP flag) and 5 ms max write time for deterministic recovery. Use Value: Supports ISO 14971 risk management by ensuring parameter integrity during brown-out conditions - validated down to 1.8 V operation. |
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 | 4 Mbit density, quad SPI support, 85 MHz max clock; no HOLD pin; different status register layout | Better suited for high-speed code shadowing; lacks HOLD functionality needed for interruptible transactions | Select only if higher bandwidth and density outweigh loss of HOLD and simpler protection scheme |
| M95512-DRMN6TP/K | 512 Kbit, same SOP-8 package; 20 MHz max clock; built-in error correction; 40 µA standby current | Higher speed and ECC support benefit automotive diagnostics; 8× higher standby current impacts battery life | Prefer for AEC-Q100 environments where ECC and speed justify increased quiescent power |
Compared with AT25DF512C-SSH-T and M95512-DRMN6TP/K, R1EX25512ASA00A offers optimal balance of low-power operation (5 µA standby), HOLD functionality for real-time transaction suspension, and hardware/software write protection - making it ideal for cost-sensitive, battery-constrained, and safety-critical embedded systems where deterministic timing and data integrity are paramount.
Availability
R1EX25512ASA00A is available at Aetrix Electronics and suitable for consumer audio, industrial sensor calibration, smart metering, and medical device applications requiring stable component supply, long-term data retention, and robust write protection.
Supply support for R1EX25512ASA00A 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 memory solutions for automotive, industrial, and IoT markets.
The R1EX25xxx series targets cost-optimized, low-power embedded systems needing reliable non-volatile storage - designed specifically for consumer electronics and qualified for industrial temperature operation with MONOS-based endurance and retention.
FAQ
What is the maximum clock frequency supported by R1EX25512ASA00A?
R1EX25512ASA00A supports up to 5 MHz when operating at 2.5 V to 5.5 V, and up to 3 MHz across the full 1.8 V to 5.5 V range. These frequencies are guaranteed under specified AC timing conditions including tCH/tCL ≥ 1/fC and input rise/fall times ≤5 ns - enabling reliable high-speed communication with modern microcontrollers without violating setup/hold margins.
Does R1EX25512ASA00A support both SPI mode 0 and mode 3?
Yes, R1EX25512ASA00A explicitly supports SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1), as confirmed in the official datasheet. This dual-mode compatibility allows seamless integration with a wide range of host processors - including ARM Cortex-M, PIC, and Renesas RX families - without requiring custom SPI peripheral configuration or bit-banging workarounds.
How does the HOLD function operate on R1EX25512ASA00A?
The HOLD pin on R1EX25512ASA00A pauses ongoing SPI communication without resetting the internal state: when asserted low while serial clock (C) is low, Q goes high-impedance and D/C are ignored; resuming requires HOLD high while C remains low. This enables deterministic interruption of long read/write sequences - essential for servicing real-time interrupts in resource-constrained microcontrollers interfacing with R1EX25512ASA00A.
What write protection mechanisms does R1EX25512ASA00A provide?
R1EX25512ASA00A implements two complementary write protection layers: software-based block protection via BP0/BP1 bits in the status register (configurable per quarter/half/whole memory), and hardware-enforced protection via SRWD bit + W pin. When SRWD = 1 and W = low, the device enters Hardware Protected Mode - freezing BP bits and disabling all status register writes, thereby preventing unauthorized firmware or calibration data modification even if software is compromised.
Is R1EX25512ASA00A suitable for industrial temperature applications?
Yes, R1EX25512ASA00A is fully rated for −40 °C to +85 °C operation, with guaranteed performance across this range for all DC and AC parameters - including 5 MHz max clock, 5 µA standby current, and 5 ms write cycle time. Its MONOS memory technology ensures stable 100-year data retention and 100k-cycle endurance at +85 °C, meeting requirements for industrial controllers, smart meters, and environmental monitoring equipment.
R1EX25512ASA00A#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- -
- Memory Format:
- -
- Technology:
- -
- Memory Size:
- -
- Memory Organization:
- -
- Memory Interface:
- -
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
R1EX25512ASA00A#S0 FAQ
1.How can I place an order for R1EX25512ASA00A#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX25512ASA00A#S0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of R1EX25512ASA00A#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX25512ASA00A#S0 is usually 5 days.
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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 R1EX25512ASA00A#S0?
For technical support, including R1EX25512ASA00A#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX25512ASA00A#S0 requirements.
6.How does Aetrix verify that R1EX25512ASA00A#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX25512ASA00A#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 R1EX25512ASA00A#S0 meets industry standards.
7.What is the process for return or replacement of R1EX25512ASA00A#S0?
All R1EX25512ASA00A#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX25512ASA00A#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 R1EX25512ASA00A#S0 part is unused and in its original packaging.
Return procedure for R1EX25512ASA00A#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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