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Renesas R1LV0408CSB-5UC#D0
- Part No.:
- R1LV0408CSB-5UC#D0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1LV0408CSB-5UC#D0.pdf
- Description:
- STANDARD SRAM, 512KX8
- Quantity:
- Payment:
- Shipping:
Inventory:2,903
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Product details
Overview
R1LV0408CSB-5UC#D0 from Renesas Electronics is a 4-Mbit static RAM organized as 512-kword × 8-bit, fabricated in 0.15 µm CMOS/TFT process. It operates from a single 3 V supply (2.7–3.6 V), delivers 55 ns max access time, draws only 0.1 µA typical standby current at +25°C, and is packaged in 32-pin TSOP II for compact board integration. It serves as non-volatile data buffer in battery-backed instrumentation and portable medical monitors.
For engineers reviewing the R1LV0408CSB-5UC#D0 datasheet, R1LV0408CSB-5UC#D0 pinout, R1LV0408CSB-5UC#D0 application, or R1LV0408CSB-5UC#D0 equivalent, key selection criteria include low-VCC data retention down to 2.0 V, TTL-compatible I/O timing, and −40°C to +85°C industrial temperature operation with verified 32-pin TSOP II footprint.
Technical Context
This SRAM implements asynchronous parallel interface logic with three-state bidirectional I/Os, chip-select (CS#) and output-enable (OE#) controlled read/write sequencing, and write-enable (WE#) active-low latching. Its memory matrix uses row/column decoding across 2,048 × 2,048 cells, supporting equal address-to-data and cycle times without internal refresh circuitry.
Timing compliance includes tAA ≤ 55 ns, tCO ≤ 55 ns, tOE ≤ 30 ns, and tLZ = 10 ns, all specified under VCC = 2.7–3.6 V and full industrial temperature range. Standby mode activates when CS# = VIH, reducing ICC to sub-microamp levels while retaining data at VCC ≥ 2.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 4 Mbit (512 kwords × 8 bits) - supports byte-wide data paths without external multiplexing |
| Supply voltage | 2.7 V to 3.6 V - compatible with 3.3 V logic rails and tolerant of brown-out conditions |
| Access time | 55 ns max - enables direct interfacing with legacy microcontrollers running ≤18 MHz bus clocks |
| Standby current | 0.1 µA typ at +25°C - extends battery life in always-on monitoring systems beyond 10 years |
| Data retention VCC | 2.0 V min - maintains stored values during deep sleep or backup power transitions |
| Operating temperature | −40°C to +85°C - qualified for industrial control cabinets and outdoor telemetry enclosures |
| I/O compatibility | TTL-level inputs/outputs - eliminates level-shifter requirements in mixed-voltage designs |
Pinout & Package
Package: 32-pin TSOP II (400-mil), 11.8 mm × 13.4 mm footprint, 1.0 mm height - optimized for high-density PCB layouts with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address input | 19-bit address bus supporting full 512-kword addressing without external decoding |
| I/O0–I/O7 | Data input/output | Bidirectional 8-bit data bus with three-state control for shared memory bus arbitration |
| CS# | Chip select | Active-low enable controlling device activation and standby entry/exit |
| OE# | Output enable | Active-low gate for read data output; high-Z when deasserted during writes or idle |
| WE# | Write enable | Active-low strobe synchronizing write data capture with address setup and hold timing |
| VCC | Power supply | Primary 3 V supply pin; decoupling required within 5 mm for stable 55 ns timing |
| VSS | Ground | Digital ground reference; must be connected to low-impedance plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 3 V operation | Eliminates dual-rail regulators and simplifies power architecture in portable devices |
| 55 ns access with equal cycle time | Enables deterministic bus timing without wait-state insertion on 8/16-bit microcontrollers |
| 0.1 µA typical standby current | Reduces quiescent power to <1 µW, critical for coin-cell–powered data loggers |
| 2.0 V data retention threshold | Preserves memory contents during brown-out recovery without external backup capacitors |
| TTL-compatible I/O | Direct connection to legacy FPGA I/O banks and microcontroller GPIO without level translation |
Applications
| Portable Medical Monitors | Industrial PLC Data Buffers |
|---|---|
Use Scenario: Continuous ECG waveform capture and local storage during wireless transmission gaps. IC Role / Device Role / Timing Role: Asynchronous SRAM holding 30+ seconds of raw sensor data with zero-refresh overhead. Use Value: 55 ns access ensures real-time buffering at 1 kHz sampling; 0.1 µA standby extends AA-battery life to >2 years. | Use Scenario: Storing I/O state snapshots and ladder logic variables in modular controller backplanes. IC Role / Device Role / Timing Role: Non-volatile shadow RAM mirroring volatile registers during firmware updates. Use Value: −40°C to +85°C rating guarantees operation in unconditioned cabinet environments; 2.0 V retention prevents data loss during 100-ms power dips. |
| Smart Meter Firmware Caches | Avionics Health Monitoring Units |
Use Scenario: Caching tariff tables and consumption history for tamper-resistant billing calculations. IC Role / Device Role / Timing Role: Byte-accessible scratchpad memory accessed by secure MCU during cryptographic operations. Use Value: TTL compatibility avoids signal integrity issues on long meter PCB traces; 32-pin TSOP II allows rework-friendly placement near BGA processors. | Use Scenario: Logging flight-critical sensor anomalies during transient power faults in auxiliary systems. IC Role / Device Role / Timing Role: Battery-backed event recorder preserving last 10,000 fault timestamps and parameters. Use Value: Verified 55 ns timing at −40°C ensures deterministic response during cold-soak startup; 0.1 µA standby minimizes drain on isolated backup batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 256K × 16-bit organization, 10 ns access, 3.3 V only, 44-pin TSOP | Higher bandwidth but wider data bus requires glue logic for 8-bit controllers | Select when system demands >2× throughput and board space permits larger package |
| AS6C4008-55TIN | 4 Mbit × 8-bit, 55 ns access, 2.7–3.6 V, 32-pin SOP (not TSOP) | Same density/timing but 525-mil SOP footprint increases board area by 35% | Choose only if existing layout lacks TSOP II reflow capability or requires through-hole compatibility |
Compared with IS61LV25616AL-10TLI and AS6C4008-55TIN, R1LV0408CSB-5UC#D0 uniquely combines 32-pin TSOP II compactness, industrial temperature support, and sub-microamp standby-making it optimal for space-constrained, battery-sensitive embedded recorders where pin count and power dominate over raw speed.
Availability
R1LV0408CSB-5UC#D0 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC data buffers, and smart meter firmware caches requiring stable component supply across extended product lifecycles.
Supply support for R1LV0408CSB-5UC#D0 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 industrial, automotive, and infrastructure markets.
The R1LV0408D Series was designed specifically for low-power, battery-backed data retention in space-constrained embedded systems-emphasizing ultra-low standby current, wide VCC tolerance, and industrial temperature reliability without refresh circuitry.
FAQ
What is the maximum operating frequency supported by R1LV0408CSB-5UC#D0?
R1LV0408CSB-5UC#D0 does not operate at a clock frequency-it is an asynchronous SRAM. Its performance is defined by access time (55 ns max) and cycle time (55 ns), enabling reliable interfacing with microcontrollers or FPGAs running bus clocks up to approximately 18 MHz without wait states. The R1LV0408CSB-5UC#D0 datasheet specifies timing under DC and AC conditions, not clocked operation.
Does R1LV0408CSB-5UC#D0 require a refresh circuit?
No, R1LV0408CSB-5UC#D0 is a static RAM and contains no dynamic memory cells; it retains data indefinitely as long as power is applied and CS# remains asserted or VCC stays above 2.0 V. Unlike DRAM, the R1LV0408CSB-5UC#D0 needs no external refresh controller, simplifying system design and reducing firmware overhead.
What is the meaning of the "UC" suffix in R1LV0408CSB-5UC#D0?
The "UC" suffix in R1LV0408CSB-5UC#D0 indicates the industrial temperature grade (−40°C to +85°C) and lead-free, RoHS-compliant packaging per Renesas ordering conventions. The "C" denotes the temperature range, and "U" signifies green (halogen-free, Pb-free) construction. This matches the "I" version in the ordering table and confirms full industrial qualification for R1LV0408CSB-5UC#D0.
Can R1LV0408CSB-5UC#D0 interface directly with a 5 V microcontroller?
No-R1LV0408CSB-5UC#D0 is strictly a 3 V device (2.7–3.6 V VCC) with TTL-compatible I/O thresholds, but its inputs are not 5 V tolerant. Driving its address/data lines from a 5 V MCU will exceed absolute maximum ratings and risk damage. The R1LV0408CSB-5UC#D0 requires level translation or a 3.3 V–compatible host processor.
What is the minimum VCC required to retain data in R1LV0408CSB-5UC#D0 during standby?
R1LV0408CSB-5UC#D0 guarantees data retention down to VCC = 2.0 V when CS# is held high (standby mode), per the Low VCC Data Retention Characteristics table. At this voltage, typical retention current is 2.5 µA (−5S% grade at +25°C). The R1LV0408CSB-5UC#D0 maintains stored bits without corruption during brown-out events or battery decay below nominal 3 V.
R1LV0408CSB-5UC#D0 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:
- -
R1LV0408CSB-5UC#D0 FAQ
1.How can I place an order for R1LV0408CSB-5UC#D0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LV0408CSB-5UC#D0 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 R1LV0408CSB-5UC#D0 reliable?
The price and inventory of R1LV0408CSB-5UC#D0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LV0408CSB-5UC#D0 is usually 5 days.
3.What payment methods are accepted for R1LV0408CSB-5UC#D0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LV0408CSB-5UC#D0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LV0408CSB-5UC#D0?
R1LV0408CSB-5UC#D0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LV0408CSB-5UC#D0 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 R1LV0408CSB-5UC#D0?
For technical support, including R1LV0408CSB-5UC#D0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LV0408CSB-5UC#D0 requirements.
6.How does Aetrix verify that R1LV0408CSB-5UC#D0 is sourced from the original manufacturer or authorized distributors?
All R1LV0408CSB-5UC#D0 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 R1LV0408CSB-5UC#D0 meets industry standards.
7.What is the process for return or replacement of R1LV0408CSB-5UC#D0?
All R1LV0408CSB-5UC#D0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LV0408CSB-5UC#D0, 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 R1LV0408CSB-5UC#D0 part is unused and in its original packaging.
Return procedure for R1LV0408CSB-5UC#D0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LV0408CSB-5UC#D0 Tags
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