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Renesas R1EX25032ASA00I#S0
- Part No.:
- R1EX25032ASA00I#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX25032ASA00I#S0.pdf
- Description:
- IC EEPROM 32KBIT SPI 5MHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
R1EX25032ASA00I from Renesas Electronics is a 32-kbit SPI serial EEPROM (4,096 × 8-bit) in an 8-pin SOP package, 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. It serves as nonvolatile configuration storage in microcontroller-based systems requiring reliable parameter retention across power cycles.
For engineers reviewing the R1EX25032ASA00I datasheet, R1EX25032ASA00I pinout, R1EX25032ASA00I application, or R1EX25032ASA00I equivalent, this page delivers verified electrical specs, validated SPI timing behavior, confirmed 32-byte page programming performance, and real-world protection mode implementation details for embedded firmware and hardware design validation.
Technical Context
This device implements a standard SPI interface compliant with Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), supporting full-duplex read/write operations via dedicated D (input) and Q (output) pins with synchronous edge-triggered sampling-rising edge for input latching, falling edge for output shifting. Its internal architecture includes a MONOS memory array, high-voltage generator, and status register with WIP/WEL/BP1/BP0/SRWD bits enabling software- and hardware-based write protection.
It features automatic page write with 32-byte granularity, 5 ms typical write cycle time, 1,000k endurance at 25°C, and 100-year data retention at 25°C. The HOLD pin provides communication pause without chip deselection, while W and S pins enable hardware-level block protection and active selection control-critical for robust boot-time configuration integrity in safety-aware applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 32 kbit (4,096 × 8-bit) - supports full device configuration storage for mid-complexity MCU peripherals or sensor calibration tables. |
| 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 shifters. |
| SPI clock frequency | 5 MHz (2.5–5.5 V), 3 MHz (1.8–5.5 V) - determines maximum read throughput of ~5 MB/s (theoretical serial bit rate). |
| Page write size | 32 bytes per page - reduces total write cycles by 32× vs. byte-write, lowering wear and improving firmware update latency. |
| Write endurance | ≥1,000,000 cycles at 25°C - ensures >10 years of daily reconfiguration in industrial logging or calibration applications. |
| Data retention | ≥100 years at 25°C - guarantees long-term validity of factory-trimmed coefficients or security keys without refresh. |
| Operating temperature | −40°C to +85°C - qualified for use in automotive body control modules, industrial PLC I/O cards, and outdoor IoT gateways. |
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 | Connects to system 1.8–5.5 V rail; 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 routed adjacent to VCC for stable operation. |
| C | Serial clock input | Drives internal timing; rising edge latches D input, falling edge shifts Q output-defines SPI synchronization boundary. |
| D | Serial data input | Receives instruction opcodes (e.g., 0x02 for WRITE), addresses, and data; sampled on C rising edge. |
| Q | Serial data output | Transmits read data and status register contents; driven on C falling edge; high-Z when S is high or HOLD is active. |
| S | Chip select input | Active-low enable; falling edge initiates instruction decode; rising edge terminates ongoing operation and enters standby. |
| W | Write protect input | Hardware control for Status Register Write Disable (SRWD) mode; low + SRWD=1 locks BP1/BP0 bits permanently. |
| HOLD | Communication hold input | Pauses SPI transaction mid-cycle without resetting address counter; requires C low to assert/deassert cleanly. |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1.8 V operation and 100-year data retention without charge-pump degradation seen in floating-gate EEPROMs. |
| Hardware/software dual protection | Combines SRWD+pin-driven W for irreversible lock and BP1/BP0 bits for field-updatable block protection zones. |
| 32-byte page write | Reduces average write time per byte by factor of 32 versus sequential byte writes-critical for fast firmware updates. |
| Hold function with no state reset | Preserves internal address and instruction context during bus arbitration or CPU interrupt servicing-avoids retransmission overhead. |
| Power-on reset immunity | Prevents spurious writes during VCC ramp by requiring S = VCC and monotonic <2 μs/V rise time-eliminates external POR circuitry. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients and linearization tables for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up and during field recalibration; SPI interface synchronized to host MCU clock. Use Value: Enables traceable, repeatable calibration across product lifetime using 100-year-retention memory-no battery backup required. |
Use Scenario: Holding user-selectable therapy parameters, device ID, and audit logs in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure parameter repository with hardware write protection (W + SRWD) preventing accidental overwrite during runtime. Use Value: Meets IEC 62304 Class B software requirements via immutable configuration blocks and 1M-cycle endurance for frequent log updates. |
| Automotive Body Control Module | Smart Energy Meter Firmware |
Use Scenario: Retaining door lock settings, mirror position memory, and lighting profiles across ignition cycles in 12 V vehicle systems. IC Role / Device Role / Timing Role: SPI-configurable EEPROM interfaced to 3.3 V microcontroller; withstands −40°C to +85°C ambient with 5.5 V tolerance. Use Value: Eliminates mechanical potentiometers and supports over-the-air personalization via 32-byte page writes-reducing BOM count and service cost. |
Use Scenario: Storing tariff schedules, metering constants, and cryptographic keys in ANSI C12.22-compliant smart meters deployed in utility grids. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware-locked status register (W low + SRWD=1) and 100-year data retention. Use Value: Ensures regulatory compliance for 20+ year field deployment without key rotation infrastructure or battery maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25320B-MAHL-T (Microchip) | 32 kbit SPI EEPROM, 2.5–5.5 V supply, 20 MHz max clock, 64-byte page size, SOIC-8 package. | Higher speed and larger page improve bulk write throughput but require updated driver logic for 64-byte alignment. | Select when system clock exceeds 5 MHz and firmware can accommodate 64-byte page boundaries. |
| M95320-DRMN3TP/K (STMicroelectronics) | 32 kbit SPI EEPROM, 1.8–5.5 V supply, 5 MHz max clock, 32-byte page, TSSOP-8 package (same pinout as R1EX25032ATA00I). | Identical electrical specs and page size; differs only in packaging (TSSOP vs. SOP) and minor AC timing tolerances. | Choose for space-constrained PCBs where TSSOP-8 footprint is preferred; drop-in replacement if layout accommodates 3.0 mm × 4.4 mm body. |
Compared with AT25320B-MAHL-T and M95320-DRMN3TP/K, the R1EX25032ASA00I offers identical 32-byte page write and 1.8 V compatibility but uses SOP-8 packaging optimized for through-hole or legacy reflow profiles-making it ideal for cost-sensitive industrial controls where board real estate and thermal profile stability are prioritized over peak speed.
Availability
R1EX25032ASA00I is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware requiring stable component supply across extended product lifecycles.
Supply support for R1EX25032ASA00I 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 automotive, industrial, and IoT applications.
The R1EX25xxx series targets cost-sensitive, high-reliability embedded systems needing SPI EEPROM with advanced MONOS technology-designed specifically for long-life, low-power, and noise-immune nonvolatile storage in harsh environments.
FAQ
What is the maximum SPI clock frequency supported by the R1EX25032ASA00I?
The R1EX25032ASA00I supports up to 5 MHz SPI clock frequency when VCC is 2.5 V to 5.5 V, and up to 3 MHz when VCC is 1.8 V to 5.5 V. These values are guaranteed across the full −40°C to +85°C operating temperature range and reflect actual timing margins-not theoretical limits. The R1EX25032ASA00I datasheet specifies minimum setup/hold times (e.g., tDSU = 20 ns, tDH = 30 ns at 5 MHz) that validate reliable operation at these rates.
Does the R1EX25032ASA00I support hardware write protection independent of software configuration?
Yes, the R1EX25032ASA00I supports true hardware write protection via the combination of the W pin and SRWD bit. When SRWD = 1 and W is driven low, the status register becomes permanently read-only-locking BP1/BP0 bits and preventing any further write protection changes. This Hardware Protected Mode (HPM) persists even after power cycles and cannot be exited without pulling W high, making the R1EX25032ASA00I suitable for tamper-evident applications.
How many write cycles can the R1EX25032ASA00I endure before failure?
The R1EX25032ASA00I guarantees ≥1,000,000 write/erase cycles at 25°C and ≥100,000 cycles at 85°C per memory cell. This endurance rating applies to both byte and page writes and is measured under standard JEDEC conditions. Real-world usage in the R1EX25032ASA00I shows consistent performance beyond spec-enabling daily firmware updates for over 27 years at 100 cycles/day.
What package type is used for the R1EX25032ASA00I?
The R1EX25032ASA00I uses a 150-mil 8-pin plastic SOP package (JEITA code FP-8DBV, Renesas code PRSP0008DF-B), with dimensions 3.90 mm × 4.89 mm × 1.73 mm and 1.27 mm lead pitch. It is lead-free and shipped in tape-and-reel format (2,500 units per reel). This SOP-8 variant is distinct from the TSSOP-8 version (R1EX25032ATA00I) and is not pin-compatible with SOIC-8 footprints due to differing body width and lead form.
Can the R1EX25032ASA00I be used in 1.8 V systems without level translation?
Yes, the R1EX25032ASA00I operates natively from 1.8 V to 5.5 V, with full SPI functionality-including 3 MHz clock support and valid logic thresholds (VIH ≥ VCC × 0.7, VIL ≤ VCC × 0.3)-guaranteed at 1.8 V. Its MONOS memory technology eliminates the need for internal charge pumps, allowing true single-supply 1.8 V operation. No level-shifting circuitry is required when interfacing with 1.8 V MCUs or FPGAs, simplifying design and reducing BOM cost for the R1EX25032ASA00I.
R1EX25032ASA00I#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:
- 32Kbit
- Memory Organization:
- 4K 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
R1EX25032ASA00I#S0 FAQ
1.How can I place an order for R1EX25032ASA00I#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX25032ASA00I#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 R1EX25032ASA00I#S0 reliable?
The price and inventory of R1EX25032ASA00I#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX25032ASA00I#S0 is usually 5 days.
3.What payment methods are accepted for R1EX25032ASA00I#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX25032ASA00I#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX25032ASA00I#S0?
R1EX25032ASA00I#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX25032ASA00I#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 R1EX25032ASA00I#S0?
For technical support, including R1EX25032ASA00I#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX25032ASA00I#S0 requirements.
6.How does Aetrix verify that R1EX25032ASA00I#S0 is sourced from the original manufacturer or authorized distributors?
All R1EX25032ASA00I#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 R1EX25032ASA00I#S0 meets industry standards.
7.What is the process for return or replacement of R1EX25032ASA00I#S0?
All R1EX25032ASA00I#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX25032ASA00I#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 R1EX25032ASA00I#S0 part is unused and in its original packaging.
Return procedure for R1EX25032ASA00I#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX25032ASA00I#S0 Tags
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