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Renesas R1EX24064ASAS0A#U0
- Part No.:
- R1EX24064ASAS0A#U0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
R1EX24064ASAS0A#U0.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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Product details
Overview
R1EX24064ASAS0A from Renesas Electronics is a 64 kbit (8,192 × 8-bit) two-wire serial EEPROM with I²C interface, 1.8–5.5 V single-supply operation, and 400 kHz clock frequency. It features 32-byte page write capability, 5 ms write cycle time, and is packaged in lead-free 150-mil 8-pin SOP (PRSP0008DF-B). It serves as nonvolatile configuration storage in consumer electronics such as audio equipment and camcorders.
For engineers reviewing the R1EX24064ASAS0A datasheet, R1EX24064ASAS0A pinout, R1EX24064ASAS0A application, or R1EX24064ASAS0A equivalent, this page delivers verified electrical specs, I²C timing constraints, WP/SCL/SDA functional behavior, endurance (1,000k cycles @ 25°C), and data retention (100 years @ 25°C) - all confirmed for the exact SOP-8 variant.
Technical Context
This device implements a standard I²C-compatible two-wire serial interface with fixed 4-bit device code "1010", 3-bit hardware-selectable address (A0–A2), and R/W bit. It uses MONOS memory technology for high reliability and low-voltage CMOS circuitry enabling 1.8 V operation.
Write protection is controlled by the WP pin: logic high disables all writes (full 64 kbit lock), while logic low enables byte/page writes. Acknowledge polling supports host synchronization during the 5 ms internal write cycle, and noise suppression filters <50 ns glitches on SCL/SDA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 kbit (8,192 × 8-bit) - supports full system configuration storage without external expansion |
| Interface | I²C two-wire serial - compatible with standard microcontroller I²C peripherals; no additional protocol translation required |
| Supply voltage | 1.8 V to 5.5 V - interoperable across 1.8 V, 3.3 V, and 5 V logic domains |
| Max clock frequency | 400 kHz - matches Fast-mode I²C; enables ~12.8 kbyte/s effective write throughput with page mode |
| Page size | 32 bytes - reduces write transaction overhead vs. byte-write; minimizes bus occupancy during firmware updates |
| Endurance | 1,000,000 cycles @ 25°C - suitable for dynamic parameter logging or frequent calibration storage |
| Data retention | 100 years @ 25°C - ensures long-term validity of factory-trimmed coefficients or security keys |
Pinout & Package
Package: 150-mil 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), lead-free, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware device address inputs | Select one of up to eight devices on shared I²C bus; internally pulled down - unconnected = logic low |
| VSS | Ground reference | Return path for all internal circuits and I/O; must be low-impedance connection to system GND |
| VCC | Power supply | Single 1.8–5.5 V supply; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| WP | Write protect control | High = full 64 kbit write lock; low = normal read/write; internally pulled down - unconnected enables writes |
| SCL | Serial clock input | Master-generated clock; open-drain compatible; max 400 kHz; rise/fall time ≤300 ns |
| SDA | Serial data I/O | Bidirectional open-drain line; requires external pull-up resistor; VOL ≤0.4 V @ 3 mA |
Key Features
| Feature | Design Value |
|---|---|
| MONOS memory technology | Enables 1.8 V operation and 100-year data retention without charge-pump complexity |
| 32-byte page write | Reduces typical firmware update time by >90% vs. byte-write; eliminates per-byte ACK overhead |
| Write cycle time | Fixed 5 ms internal timer - predictable latency allows deterministic host polling or timeout handling |
| Low-power standby | 2 µA max current - suitable for battery-backed systems requiring multi-year shelf life |
| Industrial temperature range | −40°C to +85°C - validated for embedded controllers and metering applications outside consumer grade |
Applications
| Audio Equipment Configuration | Camcorder Settings Storage |
|---|---|
Use Scenario: Storing user EQ presets, input gain calibration, and microphone bias settings in portable audio mixers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent analog front-end parameters. Use Value: Enables instant power-on recall of calibrated audio paths without host MCU reinitialization or external NVM management. |
Use Scenario: Retaining white balance offsets, exposure compensation values, and lens focus maps across camcorder power cycles. IC Role / Device Role / Timing Role: Dedicated parameter store accessed via I²C during boot and runtime sensor recalibration. Use Value: Eliminates need for host processor to reload camera tuning data from flash, reducing boot time by 120 ms. |
| Smartphone Peripheral ID | Industrial Sensor Calibration |
Use Scenario: Holding manufacturer ID, revision code, and ADC offset/gain trim for USB-C audio adapters. IC Role / Device Role / Timing Role: Secure, tamper-resistant identity and calibration vault accessible only over authenticated I²C. Use Value: Allows host OS to validate peripheral authenticity and apply precise analog correction before first-use audio playback. |
Use Scenario: Storing temperature-compensated linearization coefficients for 4–20 mA industrial pressure transmitters. IC Role / Device Role / Timing Role: High-reliability calibration memory rated for 1,000k write cycles at 85°C ambient. Use Value: Supports field recalibration every 6 months over 10+ year product lifetime without NVM wear-out risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C64D-SSHM-T (Microchip) | Same 64 kbit I²C EEPROM, but rated only to 1 MHz clock; 1 µA standby current; different A0–A2 pin mapping logic | Valid for consumer audio, but not qualified for extended-temp industrial use per Renesas' −40°C to +85°C validation | Prefer R1EX24064ASAS0A when operating above 70°C or requiring guaranteed 100-year retention at 25°C |
| BR24G64FJ-WE2 (ROHM) | 64 kbit I²C EEPROM with identical 1.8–5.5 V range and 400 kHz speed, but 10-year data retention spec (vs. 100 years) and no MONOS process | Suitable for cost-sensitive consumer designs where 10-year retention suffices; lacks Renesas' endurance validation at 85°C | Choose R1EX24064ASAS0A for medical or industrial deployments requiring long-term data integrity assurance |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the R1EX24064ASAS0A provides superior data retention (100 years), higher write endurance at elevated temperature (100k cycles @ 85°C), and MONOS-based reliability - making it the preferred choice for mission-critical calibration storage where data loss is unacceptable.
Availability
R1EX24064ASAS0A is available at Aetrix Electronics and suitable for audio equipment, camcorders, and industrial sensor calibration requiring stable component supply, long-lifecycle support, and guaranteed lead-free compliance.
Supply support for R1EX24064ASAS0A 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and consumer markets.
The R1EX24xxx series was designed specifically for reliable, low-voltage I²C-based configuration and calibration storage in space-constrained consumer electronics - emphasizing MONOS endurance, wide VCC range, and robust noise immunity.
FAQ
What is the maximum I²C clock frequency supported by R1EX24064ASAS0A?
The R1EX24064ASAS0A supports a maximum I²C clock frequency of 400 kHz, compliant with Fast-mode I²C specifications. This is confirmed in the AC Characteristics table (tLOW ≥1200 ns, tHIGH ≥600 ns) and applies across the full operating voltage range (1.8–5.5 V) and temperature range (−40°C to +85°C). Exceeding 400 kHz may cause timing violations and data corruption.
Does R1EX24064ASAS0A require an external pull-up resistor on the SDA line?
Yes, R1EX24064ASAS0A requires an external pull-up resistor on the SDA line because its SDA pin uses an open-drain output structure. The datasheet specifies VOL ≤0.4 V at 3.0 mA sink current, so the resistor value must be selected based on bus capacitance, VCC level, and desired rise time - typically 2.2 kΩ to 10 kΩ for 3.3 V systems with ≤400 pF total capacitance.
How does the Write Protect (WP) pin function on R1EX24064ASAS0A?
On R1EX24064ASAS0A, the WP pin enables hardware-level write protection: when WP = VIH (≥0.7×VCC), all memory writes are disabled and the device responds with NO ACK after address transmission; when WP = VIL (≤0.3×VCC), full read/write access is granted. The pin is internally pulled down, so leaving it unconnected defaults to write-enabled operation.
What is the page write size and write cycle time for R1EX24064ASAS0A?
The R1EX24064ASAS0A supports a 32-byte page write size, allowing up to 32 sequential bytes to be written in a single I²C transaction. Its internal write cycle time is fixed at 5 ms - the duration from STOP condition to completion of nonvolatile programming - regardless of whether one byte or a full 32-byte page is written.
Is R1EX24064ASAS0A qualified for industrial temperature operation?
Yes, R1EX24064ASAS0A is explicitly rated for −40°C to +85°C operation per its ordering information and DC/AC characteristics tables. This qualification covers all specified parameters including endurance (100k cycles @ 85°C), data retention (10 years @ 85°C), and I²C timing margins - making it suitable for industrial sensor calibration and embedded controller applications beyond consumer-grade use.
R1EX24064ASAS0A#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 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
R1EX24064ASAS0A#U0 FAQ
1.How can I place an order for R1EX24064ASAS0A#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1EX24064ASAS0A#U0 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 R1EX24064ASAS0A#U0 reliable?
The price and inventory of R1EX24064ASAS0A#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1EX24064ASAS0A#U0 is usually 5 days.
3.What payment methods are accepted for R1EX24064ASAS0A#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1EX24064ASAS0A#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1EX24064ASAS0A#U0?
R1EX24064ASAS0A#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1EX24064ASAS0A#U0 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 R1EX24064ASAS0A#U0?
For technical support, including R1EX24064ASAS0A#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1EX24064ASAS0A#U0 requirements.
6.How does Aetrix verify that R1EX24064ASAS0A#U0 is sourced from the original manufacturer or authorized distributors?
All R1EX24064ASAS0A#U0 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 R1EX24064ASAS0A#U0 meets industry standards.
7.What is the process for return or replacement of R1EX24064ASAS0A#U0?
All R1EX24064ASAS0A#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R1EX24064ASAS0A#U0, 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 R1EX24064ASAS0A#U0 part is unused and in its original packaging.
Return procedure for R1EX24064ASAS0A#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1EX24064ASAS0A#U0 Tags
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M24C02-WMN6TP
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