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Renesas R1LV0408DSP-7LR#B0
- Part No.:
- R1LV0408DSP-7LR#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1LV0408DSP-7LR#B0.pdf
- Description:
- STANDARD SRAM, 512KX8, 70NS
- Quantity:
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Inventory:5,936
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Product details
Overview
R1LV0408DSP-7LR#B0 from Renesas Electronics is a 4-Mbit static RAM organized as 512-kword × 8-bit, fabricated using 0.15 µm CMOS and TFT technologies. It operates from a single 3 V supply (2.7–3.6 V), delivers 70 ns max access time, consumes only 10 µA typical standby current at +25°C, and supports battery backup operation in 32-pin SOP packaging.
For engineers reviewing the R1LV0408DSP-7LR#B0 datasheet, R1LV0408DSP-7LR#B0 pinout, R1LV0408DSP-7LR#B0 application, or R1LV0408DSP-7LR#B0 equivalent, key selection criteria include low-voltage data retention (VDR = 2.0 V), TTL-compatible I/O, three-state output control, and compatibility with legacy SRAM-based microcontroller interfaces requiring 8-bit parallel data bus support.
Technical Context
The R1LV0408DSP-7LR#B0 implements a full asynchronous SRAM architecture with independent chip select (CS#), output enable (OE#), and write enable (WE#) controls. Its timing supports equal access and cycle times, enabling deterministic read/write behavior without internal clocks or refresh cycles.
It features common I/O pins with three-state output drivers, direct TTL-level compatibility on all inputs and outputs, and low-power standby mode activated when CS# is high - achieving ≤10 µA ISB1 at +25°C and retaining data down to 2.0 V VCC while maintaining CS# ≥ VCC − 0.2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512 kwords × 8 bits) - supports byte-wide data transfers in embedded controllers and legacy peripherals. |
| Supply voltage | 2.7–3.6 V - compatible with 3.3 V logic systems and tolerant of brown-out conditions during battery backup. |
| Access time | 70 ns (max) - defines worst-case read latency for CPU or DMA access in real-time systems. |
| Standby current | 10 µA (typ, +25°C) - enables multi-year battery life in always-on memory retention applications. |
| Data retention voltage | 2.0 V minimum - allows continued data hold during deep sleep or power-fail scenarios without external backup circuitry. |
| I/O interface | Common bidirectional 8-bit bus with three-state control - eliminates need for external transceivers in microcontroller bus designs. |
| Input compatibility | TTL-level - directly interfaces with legacy 5 V-tolerant microcontrollers and FPGAs without level shifters. |
Pinout & Package
Package: 32-pin plastic SOP (32P2M-A), 525-mil width, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address input | 19-bit address bus supporting full 512-kword addressing; A0 is LSB. |
| I/O0–I/O7 | Data input/output | Bidirectional 8-bit data bus with three-state output drivers controlled by OE# and CS#. |
| CS# | Chip select | Active-low enable; places device in standby (high-Z I/O) when high; required for all operations. |
| OE# | Output enable | Active-low control for read data output; must be low during read, high during write or standby. |
| WE# | Write enable | Active-low signal initiating write cycles; overlaps with CS# low to define valid write window. |
| VCC | Power supply | +2.7 to +3.6 V core supply; powers internal logic and I/O buffers. |
| VSS | Ground | Reference ground for all signals and internal circuitry; requires low-impedance PCB connection. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 3 V operation | Eliminates dual-rail power design complexity and reduces BOM count in portable and battery-backed systems. |
| Low standby power dissipation | 10 µA typical at +25°C enables >10-year data retention on coin-cell batteries in metering and security modules. |
| Direct TTL compatibility | All inputs accept standard TTL voltage thresholds (VIH ≥ 2.2 V, VIL ≤ 0.6 V), simplifying integration with legacy MCUs. |
| Equal access and cycle times | Ensures predictable timing margins in synchronous bus protocols without added wait states or glue logic. |
| Battery backup operation | Valid data retention at VCC ≥ 2.0 V with CS# held high, supporting seamless transition to backup power during main supply loss. |
Applications
| Smart Meter Data Buffering | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing tariff schedules, event logs, and calibration data in electricity/water/gas meters with intermittent main power. IC Role / Device Role / Timing Role: Non-refreshing byte-addressable memory holding critical configuration and usage history between firmware updates. Use Value: 2.0 V data retention threshold ensures uninterrupted storage during brownouts; 10 µA standby current extends lithium battery life beyond 12 years. | Use Scenario: Retaining ladder logic parameters, I/O mapping, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Parallel-access SRAM interfaced directly to microcontroller address/data buses for fast configuration read/write during runtime. Use Value: 70 ns access time meets deterministic scan-cycle timing requirements; TTL compatibility avoids level-shifter components in legacy 5 V control backplanes. |
| Medical Device Event Logging | Automotive Body Control Module Memory |
Use Scenario: Recording diagnostic timestamps, sensor anomalies, and user interactions in portable diagnostic tools powered by rechargeable batteries. IC Role / Device Role / Timing Role: Low-power volatile memory used for temporary log accumulation before transfer to nonvolatile flash or SD card. Use Value: 32-pin SOP footprint fits space-constrained handheld enclosures; 3.0 V nominal operation aligns with Li-ion battery discharge curve. | Use Scenario: Caching door lock status, lighting sequences, and window position data in automotive BCMs where ECU power cycling occurs frequently. IC Role / Device Role / Timing Role: Fast-access scratchpad memory supporting real-time response to CAN bus commands without flash wear limitations. Use Value: Common I/O bus and three-state control simplify wiring to MCU; 70 ns cycle time supports sub-100 µs command execution latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 16-bit bus width, 256K × 16 organization, 10 ns access, 3.3 V only, 44-pin TSOP | Higher density and speed but wider bus and different pinout; not drop-in compatible | Select if system requires 16-bit data path and faster access; requires PCB redesign and firmware bus-width adaptation. |
| AS6C4008-70SCN | 4-Mbit (512K × 8), 70 ns access, 2.7–3.6 V, 32-pin SOP, 15 µA ISB1 (typ) | Nearly identical function and package; slightly higher standby current than R1LV0408DSP-7LR#B0 | Drop-in alternative for cost-sensitive designs where 5 µA higher standby current is acceptable. |
Compared with IS61LV25616AL-10TLI and AS6C4008-70SCN, the R1LV0408DSP-7LR#B0 offers the lowest standby current (10 µA typ) in a 32-pin SOP footprint, making it optimal for ultra-low-power battery-retained applications where board space and energy budget are constrained.
Availability
R1LV0408DSP-7LR#B0 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical diagnostics, automotive body control, and portable instrumentation requiring stable component supply across extended product lifecycles.
Supply support for R1LV0408DSP-7LR#B0 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 industrial, automotive, and IoT applications.
The R1LV0408D Series was designed specifically for low-power, battery-backed SRAM applications in space-constrained embedded systems requiring reliable 8-bit parallel interface and extended data retention at reduced supply voltages.
FAQ
What is the maximum operating temperature range for R1LV0408DSP-7LR#B0?
The R1LV0408DSP-7LR#B0 is rated for industrial temperature operation from −40°C to +85°C, as indicated by the "I" suffix in its ordering code. This makes it suitable for deployment in harsh environments such as factory floors, outdoor utility meters, and automotive under-hood modules where thermal stability is critical. The device maintains full functionality and specified timing across this entire range.
Does R1LV0408DSP-7LR#B0 require an external clock or refresh circuitry?
No, the R1LV0408DSP-7LR#B0 is a fully static RAM and requires no external clock or refresh signals. It retains data indefinitely as long as power is applied and CS# remains high in standby mode. All timing is controlled asynchronously via CS#, OE#, and WE# signals, eliminating timing-critical clock distribution and simplifying system-level design.
Can R1LV0408DSP-7LR#B0 be used with a 5 V microcontroller interface?
Yes, the R1LV0408DSP-7LR#B0 supports TTL-level inputs (VIH ≥ 2.2 V, VIL ≤ 0.6 V) and is designed for 3.3 V operation, but its inputs are 5 V tolerant per absolute maximum ratings (VT up to VCC + 0.5 V). When interfacing with 5 V MCUs, ensure VCC is maintained within 2.7–3.6 V and use series resistors or level translators only if output drive strength or noise immunity becomes a concern in mixed-voltage systems.
What is the data retention capability of R1LV0408DSP-7LR#B0 during power loss?
The R1LV0408DSP-7LR#B0 guarantees data retention down to 2.0 V VCC when CS# is held high, with typical retention current of 10 µA at +25°C. This enables reliable operation during brownouts or battery switchover events in systems like smart meters and medical recorders, where preserving critical state information during brief power interruptions is essential.
Is R1LV0408DSP-7LR#B0 RoHS compliant and lead-free?
Yes, R1LV0408DSP-7LR#B0 is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and EU Directive 2011/65/EU. The "#B0" suffix in the part number denotes lead-free, halogen-free packaging in accordance with JEDEC standards. Full compliance documentation, including material declarations and test reports, is available through Renesas' official product portal.
R1LV0408DSP-7LR#B0 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:
- -
R1LV0408DSP-7LR#B0 FAQ
1.How can I place an order for R1LV0408DSP-7LR#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LV0408DSP-7LR#B0 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 R1LV0408DSP-7LR#B0 reliable?
The price and inventory of R1LV0408DSP-7LR#B0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LV0408DSP-7LR#B0 is usually 5 days.
3.What payment methods are accepted for R1LV0408DSP-7LR#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LV0408DSP-7LR#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LV0408DSP-7LR#B0?
R1LV0408DSP-7LR#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LV0408DSP-7LR#B0 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 R1LV0408DSP-7LR#B0?
For technical support, including R1LV0408DSP-7LR#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LV0408DSP-7LR#B0 requirements.
6.How does Aetrix verify that R1LV0408DSP-7LR#B0 is sourced from the original manufacturer or authorized distributors?
All R1LV0408DSP-7LR#B0 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 R1LV0408DSP-7LR#B0 meets industry standards.
7.What is the process for return or replacement of R1LV0408DSP-7LR#B0?
All R1LV0408DSP-7LR#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LV0408DSP-7LR#B0, 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 R1LV0408DSP-7LR#B0 part is unused and in its original packaging.
Return procedure for R1LV0408DSP-7LR#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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