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Renesas R1LP0408DSB-7SR#B0
- Part No.:
- R1LP0408DSB-7SR#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-7SR#B0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:1,421
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Product details
Overview
R1LP0408DSB-7SR#B0 from Renesas Electronics is a 4Mb advanced low-power static RAM organized as 512-kword × 8-bit, operating on a single 5V supply (4.5–5.5V), with 70ns max access time, 0.5mA max standby current at +70°C, and designed for battery backup systems in industrial and embedded applications.
For engineers reviewing the R1LP0408DSB-7SR#B0 datasheet, R1LP0408DSB-7SR#B0 pinout, R1LP0408DSB-7SR#B0 application, or R1LP0408DSB-7SR#B0 equivalent, this page delivers verified timing parameters, TSOP package details, TTL-compatible I/O behavior, low-voltage data retention down to 2.0V, and real-world use cases in power-sensitive memory subsystems.
Technical Context
The R1LP0408DSB-7SR#B0 implements a 2,048 × 2,048 memory matrix with full address decoding across A0–A18, supporting common I/O architecture with three-state outputs controlled by CS#, WE#, and OE#. It uses CMOS/TFT process technology to achieve low active and standby power states.
Its read/write cycle timing is fully synchronous with CS#-driven enable logic, supports simultaneous address and data bus sharing, and maintains data integrity during low-Vcc retention mode (2.0–5.5V) with guaranteed tCDR = 0ns and tR = 5ms recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4Mb (512-kword × 8-bit): provides 64KB of byte-addressable SRAM for microcontroller co-processing or buffer storage. |
| Access time | 70ns (max): ensures compatibility with 14MHz bus systems without wait states in standard operation. |
| Supply voltage | 4.5V to 5.5V: enables direct interface with legacy 5V TTL/CMOS logic without level shifting. |
| Standby current | 8μA at +70°C: allows multi-year battery backup in non-volatile memory retention mode. |
| Data retention Vcc | 2.0V min: guarantees data hold during brown-out or backup battery sag without external supervision. |
| I/O interface | Three-state common bus: simplifies PCB routing by eliminating separate data-in/data-out traces. |
| Operating temperature | 0°C to +70°C: qualified for commercial and industrial control environments with passive cooling. |
Pinout & Package
The R1LP0408DSB-7SR#B0 is housed in a 400-mil 32-pin plastic TSOP(II) package (PTSB0032DC-A / 032PTY-A), optimized for high-density surface-mount layouts and thermal performance in compact embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 5V rail input; decoupling capacitor placement critical for noise immunity during fast transitions. |
| Vss | Ground | Signal and power return path; requires low-impedance connection to minimize ground bounce. |
| A0–A18 | Address inputs | 19-bit address bus supporting full 512k-word decoding; A18 selects upper/lower half of memory space. |
| I/O0–I/O7 | Data input/output | Bidirectional 8-bit data bus with three-state control; shares pins to reduce footprint and trace count. |
| CS# | Chip select | Active-low enable that gates all internal operations; must be stable before address setup for valid access. |
| WE# | Write enable | Active-low write strobe; combined with CS# determines write cycle initiation per JEDEC timing rules. |
| OE# | Output enable | Active-low control for output drivers; allows read data to appear only when asserted, enabling bus sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for dual-rail regulators or level translators in legacy 5V system designs. |
| Low standby power dissipation | 8μA at +70°C enables >5-year coin-cell backup life in metering or alarm systems. |
| Direct TTL compatibility | All inputs and outputs meet TTL voltage thresholds, ensuring interoperability with 74-series and microcontroller GPIOs. |
| Common I/O architecture | Reduces PCB layer count and signal integrity complexity by using shared data lines for read/write. |
| Battery backup support | Valid data retention at Vcc ≥ 2.0V with no external circuitry required beyond basic decoupling. |
Applications
| Smart Energy Meters | Industrial PLC Data Buffers |
|---|---|
Use Scenario: Storing tariff logs, event timestamps, and firmware configuration during mains power loss. IC Role / Device Role / Timing Role: Non-volatile SRAM holding critical runtime data while main MCU sleeps or resets. Use Value: Guarantees zero data loss during brown-out events via 2.0V data retention and sub-10μA standby draw. | Use Scenario: Caching sensor acquisition buffers and control state variables between scan cycles. IC Role / Device Role / Timing Role: High-speed scratchpad memory interfaced directly to PLC CPU's 5V parallel bus. Use Value: 70ns access time eliminates wait states at 14MHz bus clock, improving deterministic I/O response. |
| Medical Diagnostic Handhelds | Automated Test Equipment (ATE) |
Use Scenario: Preserving calibration coefficients and last-test results during battery swaps or shutdown. IC Role / Device Role / Timing Role: Battery-backed memory retaining configuration integrity across power cycles. Use Value: Eliminates EEPROM wear-out concerns and boot-time reinitialization delays in portable diagnostics. | Use Scenario: Holding pattern memory and measurement result FIFOs in high-throughput digital test platforms. IC Role / Device Role / Timing Role: Low-latency, deterministic-access memory for real-time waveform capture and analysis. Use Value: Common I/O and TTL compatibility simplify FPGA or ASIC interface design without glue logic. |
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, 10ns access, 3.3V supply only | Requires level translation for 5V systems; higher density but incompatible voltage domain | Select only if migrating to 3.3V architecture and needing wider data bus. |
| AS6C4008-70SCN | Same 512K × 8-bit, 70ns access, but 5V-only with 2μA ISB at +70°C | Lower standby current than R1LP0408DSB-7SR#B0; identical pinout and timing | Drop-in replacement where ultra-low standby (<2μA) is prioritized over Renesas qualification. |
Compared with IS61LV25616AL-10TLI and AS6C4008-70SCN, the R1LP0408DSB-7SR#B0 uniquely balances 5V native operation, proven TSOP reliability, and battery-retention capability - making it optimal for cost-sensitive, long-life 5V embedded systems where voltage translation or redesign is prohibitive.
Availability
R1LP0408DSB-7SR#B0 is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC data buffers, medical handheld diagnostics, automated test equipment, and battery-backed instrumentation requiring stable component supply across multi-year production cycles.
Supply support for R1LP0408DSB-7SR#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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.
The R1LP0408D Series was developed as an advanced LPSRAM family targeting low-power, battery-backed memory needs in industrial control, metering, and portable instrumentation - emphasizing reliability, 5V compatibility, and extended data retention.
FAQ
What is the maximum access time specification for R1LP0408DSB-7SR#B0?
The R1LP0408DSB-7SR#B0 has a maximum access time of 70ns under standard operating conditions (Vcc = 4.5–5.5V, Ta = 0°C to +70°C). This value is measured as address access time (tAA) and chip select access time (tACS), and is validated across the full commercial temperature range. The 70ns rating ensures compatibility with 14MHz bus systems without insertion of wait states.
Does R1LP0408DSB-7SR#B0 support true battery backup operation?
Yes, the R1LP0408DSB-7SR#B0 supports true battery backup operation with guaranteed data retention down to Vcc = 2.0V. In data retention mode (CS# high, all other inputs high-impedance or held), it draws ≤8μA at +70°C and recovers full functionality within 5ms after Vcc restoration. No external circuitry is required beyond standard decoupling capacitors.
What package type is used for R1LP0408DSB-7SR#B0?
The R1LP0408DSB-7SR#B0 uses a 400-mil 32-pin plastic TSOP(II) package (JEDEC standard PTSB0032DC-A / 032PTY-A). This thin, surface-mount package supports high-density PCB layouts and is compatible with standard reflow soldering profiles. Pinout matches industry-standard 32-pin SRAM TSOP footprints.
Is R1LP0408DSB-7SR#B0 compatible with TTL-level logic interfaces?
Yes, the R1LP0408DSB-7SR#B0 is fully TTL-compatible: VIH = 2.2V min, VIL = 0.8V max, VOH = 2.4V min at IOH = –1mA, and VOL = 0.4V max at IOL = 2.1mA. All inputs and outputs meet standard TTL voltage thresholds, enabling direct connection to 74-series logic, legacy microcontrollers, and FPGA I/O banks configured for 5V-tolerant operation.
What is the standby current consumption of R1LP0408DSB-7SR#B0 at +70°C?
The R1LP0408DSB-7SR#B0 consumes ≤8μA in standby mode (CS# = VIH, all other inputs at Vss to Vcc) at +70°C. This ultra-low ISB enables multi-year operation on primary lithium batteries in metering, security, and portable instrumentation applications - a key differentiator versus standard SRAMs with mA-range standby draw.
R1LP0408DSB-7SR#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.400", 10.16mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP II
R1LP0408DSB-7SR#B0 FAQ
1.How can I place an order for R1LP0408DSB-7SR#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-7SR#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 R1LP0408DSB-7SR#B0 reliable?
The price and inventory of R1LP0408DSB-7SR#B0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408DSB-7SR#B0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-7SR#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-7SR#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-7SR#B0?
R1LP0408DSB-7SR#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-7SR#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 R1LP0408DSB-7SR#B0?
For technical support, including R1LP0408DSB-7SR#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-7SR#B0 requirements.
6.How does Aetrix verify that R1LP0408DSB-7SR#B0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-7SR#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 R1LP0408DSB-7SR#B0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-7SR#B0?
All R1LP0408DSB-7SR#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-7SR#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 R1LP0408DSB-7SR#B0 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-7SR#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSB-7SR#B0 Tags
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