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Renesas R1LP0408DSP-7SR#B0
- Part No.:
- R1LP0408DSP-7SR#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.450", 11.40mm Width)
- Datasheet:
-
R1LP0408DSP-7SR#B0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,580
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Product details
Overview
R1LP0408DSP-7SR#B0 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, 0.1μA typical standby current at +25°C, and rated for 0°C to +70°C ambient operation in a 32-pin SOP package - used for non-volatile data retention in battery-backed systems such as industrial controllers and metering devices.
For engineers reviewing the R1LP0408DSP-7SR#B0 datasheet, R1LP0408DSP-7SR#B0 pinout, R1LP0408DSP-7SR#B0 application, or R1LP0408DSP-7SR#B0 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and confirmed alternative parts for design-in and BOM continuity planning.
Technical Context
The R1LP0408DSP-7SR#B0 implements a full CMOS SRAM architecture with separate address latching, three-state bidirectional I/Os, and TTL-compatible input/output levels. It uses a 2,048 × 2,048 memory matrix with row/column decoding and integrated timing pulse generation for synchronous read/write control.
Its operation relies on active-low chip select (CS#), write enable (WE#), and output enable (OE#) signals to manage data bus contention, high-Z states, and low-power retention mode. Standby current drops to ≤0.8μA at +40°C when CS# is high, enabling reliable battery backup without external power management circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512 kwords × 8 bits) - supports byte-wide data interfaces without external multiplexing |
| Access time | 70 ns max - defines minimum clock-to-data valid delay in microcontroller or FPGA memory interfaces |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard 5V logic rails and tolerant of ±10% regulation variation |
| Standby current | 0.8 μA typ at +40°C - enables multi-year battery life in always-on backup applications |
| Operating temperature | 0°C to +70°C - qualified for commercial/industrial control environments without extended thermal derating |
| I/O interface | Common bidirectional data bus (I/O0–I/O7) with three-state control - reduces PCB trace count vs. separate DQ/DIN/DOUT |
| Input compatibility | TTL-compatible inputs (VIH ≥ 2.2 V, VIL ≤ 0.8 V) - interoperable with legacy 5V microcontrollers and FPGAs |
Pinout & Package
Package: 32-pin plastic SOP (525-mil), JEDEC standard PRSP0032DF-A (032P2S-A), surface-mount, lead-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 5V supply rail; decoupling capacitor required within 10 mm for stable read/write margins |
| Vss | Ground | Signal and power ground reference; must be connected to low-impedance system ground plane |
| A0–A18 | Address inputs | 19-bit address bus supporting full 512-kword addressing; A18 is MSB, A0 is LSB |
| I/O0–I/O7 | Bidirectional data I/O | Byte-wide shared data path; high-impedance when CS# or OE# is high |
| CS# | Chip select | Active-low enable; places device in standby (ISB) when high, enabling ultra-low-power retention |
| WE# | Write enable | Active-low write strobe; controls write cycle timing and data latching on falling edge |
| OE# | Output enable | Active-low output gate; isolates I/O pins from bus when high, preventing contention during reads |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for dual-rail regulators or level shifters in 5V systems |
| 70ns access time with equal cycle time | Enables deterministic timing in synchronous bus protocols without wait-state insertion |
| 0.8μA standby current at +40°C | Supports >5-year coin-cell battery life in tamper-proof metering and logging applications |
| Direct TTL compatibility | Interoperates with legacy 8051, Z80, and CPLD-based controllers without interface buffers |
| Battery backup data retention down to 2.0V Vcc | Maintains stored configuration or event logs during brown-out or main power loss |
Applications
| Smart Energy Metering | Industrial PLC Data Buffer |
|---|---|
Use Scenario: Storing tariff schedules, consumption logs, and firmware update staging in electricity/water/gas meters with coin-cell backup. IC Role / Device Role / Timing Role: Non-volatile data buffer retaining critical operational data during AC mains failure. Use Value: Guarantees 10+ years of data integrity using CR2032 cells due to sub-1μA ISB at room temperature. | Use Scenario: Caching sensor inputs and control outputs in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: High-reliability scratchpad memory interfaced directly to 8-bit microcontrollers via parallel bus. Use Value: Eliminates external level-shifting and reduces BOM cost by leveraging native TTL compatibility and 70ns timing. |
| Medical Diagnostic Log Storage | Point-of-Sale Transaction Cache |
Use Scenario: Capturing calibration history, error codes, and usage counters in portable ultrasound or ECG units with battery fallback. IC Role / Device Role / Timing Role: Low-power SRAM holding diagnostic state between power cycles without EEPROM wear-out limitations. Use Value: Enables unlimited write endurance and instant data availability post-power-up, unlike flash-based alternatives. | Use Scenario: Temporarily storing transaction receipts, inventory updates, and audit trails in retail terminals during network outages. IC Role / Device Role / Timing Role: Byte-accessible memory providing deterministic latency for real-time receipt generation and reconciliation. Use Value: Ensures zero data loss during brief LAN/WiFi interruptions thanks to guaranteed 2.0V data retention threshold. |
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-70ZSXIT | 4Mb, 70ns, 32-pin TSOP, 2.0–3.6V supply - requires level translation for 5V systems | Targeted at 3.3V embedded systems; lacks native 5V tolerance and TTL compatibility | Select only if migrating to lower-voltage platforms and redesigning power delivery and I/O interface |
| AS6C4008-70SCN | 4Mb, 70ns, 32-pin SOP, 4.5–5.5V supply - 1.5mA typical ISB vs. 0.1μA for R1LP0408DSP-7SR#B0 | Suitable for non-battery-backed applications where standby power is not constrained | Choose when board space allows larger decoupling and thermal margin exists for higher ISB dissipation |
Compared with CY62148EV30LL-70ZSXIT and AS6C4008-70SCN, the R1LP0408DSP-7SR#B0 uniquely combines 5V-native operation, TTL compatibility, and sub-1μA standby current - making it irreplaceable in cost-sensitive, battery-backed 5V designs requiring zero layout changes.
Availability
R1LP0408DSP-7SR#B0 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical diagnostics, and point-of-sale terminals requiring stable component supply across multi-year production cycles.
Supply support for R1LP0408DSP-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 delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.
The R1LP0408D Series was designed specifically for low-power, battery-backed memory applications in commercial and industrial equipment - emphasizing ultra-low ISB, 5V interoperability, and long-term data retention without refresh overhead.
FAQ
What is the maximum access time specification for R1LP0408DSP-7SR#B0?
The R1LP0408DSP-7SR#B0 has a maximum access time of 70 ns under standard test conditions (Vcc = 4.5–5.5 V, Ta = 0°C to +70°C). This value is measured as address access time (tAA) and chip select access time (tACS), ensuring predictable timing margins in 5V microcontroller and FPGA memory interfaces without added wait states.
Does R1LP0408DSP-7SR#B0 support true data retention during power loss?
Yes, the R1LP0408DSP-7SR#B0 supports guaranteed data retention down to Vcc = 2.0 V with CS# held high, drawing ≤10 μA at +85°C. This enables reliable operation with coin-cell batteries during main power failure, preserving configuration, logs, or calibration data without external supervision circuits.
Is R1LP0408DSP-7SR#B0 pin-compatible with other members of the R1LP0408D Series?
Yes, all R1LP0408D Series variants-including R1LP0408DSP-5SR#B0, R1LP0408DSP-7SI#B0, and R1LP0408DSB-7SR#B0-share identical 32-pin SOP pinouts and signal assignments. Only temperature range, access speed, and package type differ; no PCB redesign is needed when substituting within the same package family.
What is the standby current of R1LP0408DSP-7SR#B0 at +70°C?
The R1LP0408DSP-7SR#B0 exhibits a maximum standby current (ISB) of 8 μA at +70°C when CS# is high and all other inputs are within Vss to Vcc. Its typical ISB is 1 μA at that temperature, enabling multi-year battery life in sealed industrial enclosures with passive cooling.
Can R1LP0408DSP-7SR#B0 be used with 3.3V microcontrollers?
No - the R1LP0408DSP-7SR#B0 requires a 4.5–5.5 V supply and is not 3.3V-tolerant. Its inputs meet TTL thresholds (VIH ≥ 2.2 V), but driving it from 3.3V logic may cause marginal VIH compliance. For 3.3V systems, level-shifting or selecting a 3.3V SRAM like CY62148EV30LL-70ZSXIT is necessary.
R1LP0408DSP-7SR#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.450", 11.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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-SOP
R1LP0408DSP-7SR#B0 FAQ
1.How can I place an order for R1LP0408DSP-7SR#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSP-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 R1LP0408DSP-7SR#B0 reliable?
The price and inventory of R1LP0408DSP-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 R1LP0408DSP-7SR#B0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSP-7SR#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSP-7SR#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSP-7SR#B0?
R1LP0408DSP-7SR#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSP-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 R1LP0408DSP-7SR#B0?
For technical support, including R1LP0408DSP-7SR#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSP-7SR#B0 requirements.
6.How does Aetrix verify that R1LP0408DSP-7SR#B0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSP-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 R1LP0408DSP-7SR#B0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSP-7SR#B0?
All R1LP0408DSP-7SR#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSP-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 R1LP0408DSP-7SR#B0 part is unused and in its original packaging.
Return procedure for R1LP0408DSP-7SR#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSP-7SR#B0 Tags
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