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Renesas R1LP0408DSP-5SI#B0
- Part No.:
- R1LP0408DSP-5SI#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.450", 11.40mm Width)
- Datasheet:
-
R1LP0408DSP-5SI#B0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,482
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Product details
Overview
R1LP0408DSP-5SI#B0 from Renesas Electronics is a 4-Mbit advanced low-power static RAM (512-kword × 8-bit), designed for battery-backed memory applications requiring ultra-low standby current (1 µA typ. at +25°C), 55 ns access time, and single 5 V supply operation (4.5–5.5 V). It serves as non-volatile data retention memory in industrial controllers and real-time clock backup systems.
For engineers reviewing the R1LP0408DSP-5SI#B0 datasheet, R1LP0408DSP-5SI#B0 pinout, R1LP0408DSP-5SI#B0 application, or R1LP0408DSP-5SI#B0 equivalent, key selection criteria include standby current at elevated temperature, TTL-compatible I/O timing margins, SOP-32 package thermal profile, and CS#/WE#/OE# control logic compatibility with legacy microcontroller bus interfaces.
Technical Context
This SRAM implements a 2,048 × 2,048 memory matrix with full address decoding across A0–A18 (19-bit address bus) and bidirectional 8-bit data I/O lines. Its timing architecture enforces equal read/write cycle times (tRC = tWC = 55 ns max) and guarantees deterministic high-Z output transitions (tOHZ/tCHZ ≤ 20 ns) during chip deselect or write disable.
The device uses CMOS/TFT process technology to achieve 0.1 µA typical standby current at +25°C and supports data retention down to VCC = 2.0 V while maintaining CS#-controlled buffer isolation-critical for battery-swappable systems where power sequencing must preserve memory contents without external hold circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 4 Mbit (512-kword × 8-bit); supports 64 KB byte-addressable space with no internal banking or refresh overhead |
| Access time | 55 ns max; enables direct interface with 12–16 MHz microcontrollers without wait states |
| Standby current | 0.8 µA typ. at +40°C; ensures >10-year battery life in coin-cell–powered RTC backup applications |
| Supply voltage | 4.5–5.5 V; fully compatible with standard TTL/CMOS 5 V logic families without level translation |
| I/O interface | Three-state bidirectional data bus (I/O0–I/O7); eliminates need for external transceivers in shared-bus architectures |
| Data retention VCC | 2.0 V min; allows safe memory hold during brown-out conditions before backup battery engages |
| Operating temperature | -40°C to +85°C; qualified for industrial-grade embedded control environments |
Pinout & Package
Package: 32-pin plastic SOP (525-mil width), JEDEC MS-012AC compliant, 1.27 mm pitch, body size 13.5 mm × 23.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply input | Primary 5 V rail connection; decoupling capacitor placement critical for AC noise immunity during fast transitions |
| Vss | Ground reference | Common return path for all digital signals; requires low-inductance PCB routing to minimize ground bounce |
| A0–A18 | Address inputs | 19-bit unidirectional address bus; A18 enables full 512-kword addressing without external address latching |
| I/O0–I/O7 | Bidirectional data bus | 8-bit shared data path; three-state control via OE# and CS# prevents bus contention during read/write cycles |
| CS# | Chip select (active low) | Primary enable for memory access; when high, places all outputs in high-Z and reduces current to ISB1 level |
| WE# | Write enable (active low) | Controls write latch timing; write occurs only when CS# and WE# are simultaneously low per tWP ≥ 40 ns requirement |
| OE# | Output enable (active low) | Gates read data onto I/O bus; high-Z state maintained when OE# is high, regardless of CS# state |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low standby power | 0.8 µA typical at +40°C enables multi-year operation on CR2032 coin cells in backup memory mode |
| TTL-compatible I/O | All inputs accept 0.8 V / 2.2 V thresholds and outputs drive -1 mA / +2.1 mA loads-no level shifters needed for 5 V MCU buses |
| Equal access/cycle timing | tRC = tWC = 55 ns simplifies bus controller design by eliminating separate read/write timing constraints |
| Direct battery backup support | VDR = 2.0 V minimum allows seamless transition to backup power without data loss or external voltage monitoring |
| High-Z output control | Guaranteed tOHZ/tCHZ ≤ 20 ns ensures clean bus release for multi-drop memory configurations |
Applications
| Industrial PLC Data Logging | Medical Device Parameter Storage |
|---|---|
Use Scenario: Storing calibration coefficients and last-known sensor readings during mains power failure in programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile SRAM holding critical runtime data; retains content during 100 ms–5 s brown-out intervals using onboard backup battery. Use Value: Eliminates need for EEPROM wear-leveling or flash programming delays-data written instantly and preserved indefinitely at VCC ≥ 2.0 V. | Use Scenario: Preserving therapy settings and patient history in portable infusion pumps during battery replacement. IC Role / Device Role / Timing Role: Battery-backed memory buffer interfacing directly with ARM Cortex-M0+ MCU's 8-bit parallel bus. Use Value: 0.8 µA standby current extends CR2032 life beyond 3 years; 55 ns access enables real-time parameter recall without interrupt latency penalties. |
| Automotive Body Control Module | Smart Meter Firmware Patch Storage |
Use Scenario: Caching door lock status, window position, and mirror presets across ignition cycles in 12 V automotive systems. IC Role / Device Role / Timing Role: Low-power SRAM mapped into microcontroller's external memory space; accessed via GPIO-emulated parallel bus. Use Value: -40°C to +85°C rating ensures reliability under hood temperature extremes; 2.0 V data retention threshold matches automotive battery sag profiles. | Use Scenario: Holding firmware patch binaries and configuration deltas during over-the-air updates in electricity meters. IC Role / Device Role / Timing Role: High-reliability scratchpad memory enabling atomic update rollback without flash endurance limits. Use Value: No write-cycle endurance limit (vs. EEPROM/flash); 55 ns random access accelerates patch validation and decompression routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62148EV30LL-55ZSXI | 4 Mbit (512K × 8), 55 ns, 32-pin TSOP-II; standby current 1 µA @ +25°C; same VCC range but higher tOHZ (25 ns max) | TSOP-II footprint requires PCB redesign; slightly higher leakage may reduce battery life in long-term backup | Select if board layout already uses TSOP-II or requires lower profile than SOP |
| IS61LV25616AL-10TLI | 4 Mbit (256K × 16), 100 ns, 48-pin TSOP; 16-bit bus width; standby current 12 µA @ +25°C; no 2.0 V data retention spec | Wider data bus increases throughput but doubles pin count; higher standby current limits battery lifetime | Select only when 16-bit data path is required and battery life >1 year is not critical |
Compared with CY62148EV30LL-55ZSXI and IS61LV25616AL-10TLI, the R1LP0408DSP-5SI#B0 offers the lowest temperature-stable standby current and guaranteed 2.0 V data retention-making it uniquely suitable for long-duration, single-cell–powered backup applications where reliability trumps raw bandwidth.
Availability
R1LP0408DSP-5SI#B0 is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and automotive body control modules requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for R1LP0408DSP-5SI#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 SoC products for automotive, industrial, infrastructure, and IoT applications.
The R1LP0408D Series was developed specifically for low-power, battery-backed memory applications demanding extended data retention at reduced VCC, targeting industrial control, medical instrumentation, and automotive subsystems.
FAQ
What is the minimum supply voltage for data retention in R1LP0408DSP-5SI#B0?
The R1LP0408DSP-5SI#B0 supports data retention down to VCC = 2.0 V, provided CS# remains ≥ VCC − 0.2 V. This specification is verified per the Low Vcc Data Retention Characteristics table on page 11 of the R10DS0274EJ0200 datasheet. At 2.0 V, typical data retention current is 0.8 µA at +25°C, rising to 10 µA at +85°C. The R1LP0408DSP-5SI#B0 maintains memory integrity without external circuitry during brown-out events common in battery-switched systems.
Does R1LP0408DSP-5SI#B0 require external pull-up resistors on its control pins?
No, the R1LP0408DSP-5SI#B0 does not require external pull-up resistors on CS#, WE#, or OE# pins. Its DC operating conditions specify VIH = 2.2 V (min) and VIL = 0.8 V (max), ensuring reliable recognition of TTL-level signals from standard 5 V microcontrollers. All control inputs are internally biased to reject noise below VIL and above VIH thresholds, as confirmed in the DC Operating Conditions table (page 5) of the R10DS0274EJ0200 datasheet. The R1LP0408DSP-5SI#B0 operates correctly with direct MCU GPIO connections.
What is the maximum capacitive load the R1LP0408DSP-5SI#B0 I/O pins can drive?
The R1LP0408DSP-5SI#B0 I/O pins are characterized to drive a 50 pF load with 500 Ω series termination, as specified in the AC Characteristics test conditions (page 6). Output voltage levels meet VOH ≥ 2.4 V (IOH = −1 mA) and VOL ≤ 0.4 V (IOL = 2.1 mA) under these conditions. Exceeding 50 pF may degrade tOE (≤25 ns) and tOHZ (≤20 ns) timing margins. The R1LP0408DSP-5SI#B0 datasheet does not guarantee performance beyond this load, and layout best practices recommend minimizing trace capacitance and stub length.
Can R1LP0408DSP-5SI#B0 be used in place of older 512K × 8 SRAMs like the 6264 or 62256?
Yes, the R1LP0408DSP-5SI#B0 is pin-compatible with industry-standard 32-pin SOP 512K × 8 SRAMs such as the 6264 (8K × 8) and 62256 (32K × 8) in terms of signal mapping (A0–A15, I/O0–I/O7, CS#, WE#, OE#, Vcc, Vss), but it extends addressing to A16–A18 for full 512K word support. Its 55 ns access time meets or exceeds legacy devices, and TTL compatibility ensures drop-in replacement in existing 5 V systems. The R1LP0408DSP-5SI#B0 adds ultra-low standby current and 2.0 V data retention-features absent in older generations.
Is the R1LP0408DSP-5SI#B0 RoHS compliant and halogen-free?
Yes, the R1LP0408DSP-5SI#B0 is RoHS compliant and halogen-free, as confirmed by Renesas' product compliance documentation (R10DS0274EJ0200 Rev.2.00, page 1). It meets EU RoHS Directive 2011/65/EU and JEDEC JS709B standards for bromine and chlorine content (<900 ppm each). The "#B0" suffix denotes RoHS-compliant packaging and assembly per Renesas' ordering nomenclature. The R1LP0408DSP-5SI#B0 is suitable for environmentally regulated industrial and medical applications requiring full substance compliance reporting.
R1LP0408DSP-5SI#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.450", 11.40mm Width)
- Packaging:
- Tube
- 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:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOP
R1LP0408DSP-5SI#B0 FAQ
1.How can I place an order for R1LP0408DSP-5SI#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSP-5SI#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 R1LP0408DSP-5SI#B0 reliable?
The price and inventory of R1LP0408DSP-5SI#B0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408DSP-5SI#B0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSP-5SI#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSP-5SI#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSP-5SI#B0?
R1LP0408DSP-5SI#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSP-5SI#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 R1LP0408DSP-5SI#B0?
For technical support, including R1LP0408DSP-5SI#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSP-5SI#B0 requirements.
6.How does Aetrix verify that R1LP0408DSP-5SI#B0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSP-5SI#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 R1LP0408DSP-5SI#B0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSP-5SI#B0?
All R1LP0408DSP-5SI#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSP-5SI#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 R1LP0408DSP-5SI#B0 part is unused and in its original packaging.
Return procedure for R1LP0408DSP-5SI#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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