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Renesas R1LP0408DSB-7SI#S0
- Part No.:
- R1LP0408DSB-7SI#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-7SI#S0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
R1LP0408DSB-7SI#S0 from Renesas Electronics is a 4Mb advanced low-power static RAM organized as 512-kword × 8-bit, operating from a single 5V supply (4.5–5.5V), with 70ns max access time and -40°C to +85°C industrial temperature range. It features 4μW typical standby power dissipation, three-state I/O, TTL-compatible inputs/outputs, and battery backup capability-ideal for portable instrumentation and industrial control systems requiring non-volatile data retention during power loss.
For engineers reviewing the R1LP0408DSB-7SI#S0 datasheet, R1LP0408DSB-7SI#S0 pinout, R1LP0408DSB-7SI#S0 application, or R1LP0408DSB-7SI#S0 equivalent, key selection criteria include its TSOP-II 32-pin package, 70ns read/write timing, ultra-low ISB1 standby current (≤10μA at +85°C), and direct compatibility with legacy 5V microcontroller buses without level shifting.
Technical Context
This device implements a full CMOS SRAM architecture with independent address decoding (A0–A18), bidirectional common I/O lines (I/O0–I/O7), and asynchronous control via active-low CS#, WE#, and OE#. Its timing supports equal access and cycle times, enabling deterministic bus interfacing in real-time embedded systems.
The memory matrix uses a 2,048 × 2,048 organization with row/column decoding, and low-VCC data retention down to 2.0V ensures reliable operation during brownout conditions-critical for battery-backed memory applications where VCC may dip below nominal during backup transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512-kword × 8-bit) - provides 64KB of fast, random-access storage for firmware buffers or runtime variables. |
| Access time | 70 ns max - guarantees predictable read latency when interfaced with 14 MHz+ microcontrollers or DSPs. |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard 5V logic rails and tolerant of line regulation drift. |
| Standby current | ≤10 μA at +85°C (ISB1) - enables multi-year battery life in always-on backup mode. |
| Operating current | 10 mA max (Icc) - supports burst reads/writes without excessive thermal load in compact enclosures. |
| Package | 400-mil 32-pin TSOP(II), PTSB0032DC-A - surface-mount compatible with automated assembly and high-density PCB layouts. |
| Data retention VCC | 2.0 V min - maintains stored data during deep brownout or battery sag without external supervision. |
Pinout & Package
Package: 400-mil 32-pin plastic TSOP(II), footprint code PTSB0032DC-A (032PTY-A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 5V supply input; decoupling capacitor required within 10 mm for noise immunity. |
| Vss | Ground | Digital ground reference; must be connected to system ground plane with low-inductance path. |
| A0–A18 | Address input | 19-bit address bus supporting full 512-kword addressing; A18 selects upper/lower half of memory space. |
| I/O0–I/O7 | Data input/output | Bidirectional 8-bit data bus with three-state output control; shares pins to reduce package count and board area. |
| CS# | Chip select | Active-low enable; places device in standby (high-Z I/O) when deasserted, minimizing system power. |
| WE# | Write enable | Active-low write strobe; latches data on falling edge when CS# and OE# are inactive. |
| OE# | Output enable | Active-low output control; enables read data only when CS# is active, preventing bus contention. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for dual-rail regulators or level shifters in legacy 5V systems. |
| 70ns access with equal cycle time | Enables synchronous interface with fixed bus timing, simplifying FPGA or ASIC controller design. |
| 4μW typical standby power | Reduces quiescent current by >99% vs. standard SRAMs, extending battery life in backup mode. |
| TTL-compatible I/O | Direct connection to 5V microcontrollers without external buffering or voltage translation. |
| Low-VCC data retention | Maintains valid data at 2.0V supply-supports seamless transition to battery backup without data loss. |
Applications
| Industrial PLC Data Buffer | Portable Medical Monitor Memory |
|---|---|
Use Scenario: Storing real-time sensor logs and configuration parameters in programmable logic controllers with intermittent mains power. IC Role / Device Role / Timing Role: Non-volatile buffer holding critical state data during AC dropout; retains content at 2.0V VCC until backup battery engages. Use Value: Prevents loss of operational history and calibration settings during brief power interruptions, ensuring regulatory compliance for traceability. | Use Scenario: Capturing ECG waveforms and patient vitals in handheld diagnostic devices powered by rechargeable Li-ion cells. IC Role / Device Role / Timing Role: High-speed scratchpad memory for waveform acquisition; operates at 70ns timing to match ADC sampling rates up to 14 MSPS. Use Value: Enables continuous 30-second waveform capture with zero-gap buffering, even during battery swap or charging cycles. |
| Automotive Telematics Event Logger | Smart Energy Meter Firmware Cache |
Use Scenario: Recording vehicle crash-event data and CAN bus diagnostics in telematics control units exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Industrial-grade (-40°C to +85°C) SRAM storing pre-crash snapshots; withstands thermal cycling without refresh. Use Value: Guarantees data integrity across automotive environmental stress profiles, meeting ISO 16750-4 requirements for transient immunity. | Use Scenario: Caching tariff tables and consumption history in utility meters deployed in unconditioned outdoor enclosures. IC Role / Device Role / Timing Role: Low-power memory retaining billing data during grid outages; draws ≤10μA at +85°C to minimize battery drain. Use Value: Extends primary lithium battery life beyond 15 years while maintaining ANSI C12.1 compliance for metering accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62148EV30LL-70ZSXIT | 4Mb, 70ns, 2.2–5.5V supply, 32-pin TSOP; higher ISB (15μA @ +85°C) | Wider VCC range supports mixed-voltage designs but lacks guaranteed 2.0V data retention | Choose if system requires flexible supply rail or needs extended voltage margin beyond 5V. |
| AS6C4008-70TIN | 4Mb, 70ns, 4.5–5.5V, 32-pin TSOP; ISB = 2μA @ +25°C, not specified at +85°C | No published data retention spec below 3.0V; industrial temp rating confirmed only to +70°C | Prefer for cost-sensitive industrial controls where full -40°C to +85°C operation is not required. |
Compared with CY62148EV30LL-70ZSXIT and AS6C4008-70TIN, the R1LP0408DSB-7SI#S0 uniquely guarantees 2.0V data retention and ≤10μA standby at +85°C-making it the only option qualified for long-duration battery backup in thermally demanding environments.
Availability
R1LP0408DSB-7SI#S0 is available at Aetrix Electronics and suitable for industrial PLC data buffering, portable medical monitor memory, and automotive telematics event logging requiring stable component supply across extended temperature ranges and multi-year lifecycle support.
Supply support for R1LP0408DSB-7SI#S0 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and memory solutions for industrial, automotive, and infrastructure markets.
The R1LP0408D Series was designed specifically for battery-backed, low-power embedded systems requiring reliable 5V SRAM operation with minimal standby current and robust data retention under brownout conditions.
FAQ
What is the maximum operating temperature range for the R1LP0408DSB-7SI#S0?
The R1LP0408DSB-7SI#S0 is rated for industrial operation from -40°C to +85°C, as indicated by the "I" suffix in its part number. This range is validated per Renesas's DC and AC specifications, including standby current (ISB1 ≤10μA) and 70ns timing performance across the full span. The device meets this specification in its 400-mil TSOP(II) package without derating.
Does the R1LP0408DSB-7SI#S0 support true data retention at voltages below 3.0V?
Yes, the R1LP0408DSB-7SI#S0 guarantees data retention down to 2.0V VCC, as documented in the Low VCC Data Retention Characteristics table (page 11). At 3.0V, ICCDR is ≤10μA at +85°C, and tCDR (chip deselect time to retention) is 0ns-enabling immediate entry into low-power retention mode upon CS# assertion, critical for battery switchover reliability.
Is the R1LP0408DSB-7SI#S0 pin-compatible with other members of the R1LP0408D Series?
Yes, all R1LP0408D Series variants-including R1LP0408DSB-7SI#S0, R1LP0408DSB-5SI#S0, and R1LP0408DSP-7SI#S0-share identical 32-pin TSOP(II) or SOP pinouts and signal definitions. The "S" suffix denotes TSOP packaging, and "B" indicates tray shipping; electrical timing (55ns vs. 70ns) and temperature grade ("I" = industrial) do not affect pin mapping or logic behavior.
What is the meaning of the "#S0" suffix in R1LP0408DSB-7SI#S0?
The "#S0" suffix in R1LP0408DSB-7SI#S0 indicates embossed tape packaging with 1000 pieces per reel, per Renesas's Part Name Information table (page 1). It distinguishes this reel-packaged industrial-grade TSOP variant from tube-packaged ("#B") or different temperature versions, and confirms compliance with JEDEC standard TSOP(II) mechanical dimensions and solder reflow profiles.
Can the R1LP0408DSB-7SI#S0 be used in place of standard 5V SRAMs without circuit modification?
Yes, the R1LP0408DSB-7SI#S0 is fully TTL-compatible: all inputs accept VIH ≥ 2.2V and VIL ≤ 0.8V, and outputs drive VOH ≥ 2.4V (IOH = -1mA) and VOL ≤ 0.4V (IOL = 2.1mA). Its pinout, timing protocol, and 5V supply requirement match legacy 5V SRAMs such as the HM62256, allowing drop-in replacement in existing designs without layout or firmware changes.
R1LP0408DSB-7SI#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.400", 10.16mm Width)
- Packaging:
- Bulk
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP II
R1LP0408DSB-7SI#S0 FAQ
1.How can I place an order for R1LP0408DSB-7SI#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-7SI#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 R1LP0408DSB-7SI#S0 reliable?
The price and inventory of R1LP0408DSB-7SI#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408DSB-7SI#S0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-7SI#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-7SI#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-7SI#S0?
R1LP0408DSB-7SI#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-7SI#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 R1LP0408DSB-7SI#S0?
For technical support, including R1LP0408DSB-7SI#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-7SI#S0 requirements.
6.How does Aetrix verify that R1LP0408DSB-7SI#S0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-7SI#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 R1LP0408DSB-7SI#S0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-7SI#S0?
All R1LP0408DSB-7SI#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-7SI#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 R1LP0408DSB-7SI#S0 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-7SI#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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