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Renesas R1LP0408DSB-5SI#B0
- Part No.:
- R1LP0408DSB-5SI#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-5SI#B0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:2,204
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Product details
Overview
R1LP0408DSB-5SI#B0 from Renesas Electronics is a 4-Mbit advanced low-power static RAM organized as 512-kword × 8-bit, operating from a single 5V supply (4.5–5.5V), with 55 ns max access time, 0.1 µA typical standby current at +25°C, and rated for -40°C to +85°C industrial temperature range. It supports battery backup systems in embedded controllers and real-time data logging modules.
For engineers reviewing the R1LP0408DSB-5SI#B0 datasheet, R1LP0408DSB-5SI#B0 pinout, R1LP0408DSB-5SI#B0 application, or R1LP0408DSB-5SI#B0 equivalent, key selection criteria include industrial-grade temperature support, TSOP-II package compatibility, low-voltage data retention down to 2.0V, TTL-level interface compatibility, and verified 32-pin address/data multiplexing behavior.
Technical Context
This device implements a full CMOS static RAM architecture with independent row/column decoders driving a 2,048 × 2,048 memory matrix. It uses asynchronous control logic with active-low chip select (CS#), write enable (WE#), and output enable (OE#) signals to manage read/write cycles and three-state I/O.
Timing is defined by strict AC parameters including tAA ≤ 55 ns, tRC ≤ 55 ns, tOE ≤ 25 ns, and tWHZ ≤ 25 ns, all guaranteed across the full -40°C to +85°C range. Data retention remains valid at Vcc as low as 2.0V with CS# held high, enabling seamless battery-switchover operation without external supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512 kwords × 8 bits) - provides sufficient buffer space for firmware scratchpad or sensor data staging in resource-constrained microcontrollers. |
| Access time | 55 ns max - enables direct interfacing with legacy 8/16-bit MCUs (e.g., Renesas RL78, SH-2) without wait-state insertion. |
| Supply voltage | 4.5V to 5.5V - ensures compatibility with standard 5V logic rails and tolerates brown-out conditions during power transitions. |
| Standby current | 0.1 µA typ at +25°C - allows multi-year battery life in always-on backup mode for RTC or configuration storage applications. |
| Operating temperature | -40°C to +85°C - qualified for industrial automation, automotive body control, and outdoor metering environments. |
| Data retention voltage | 2.0V min - guarantees nonvolatile data hold during main supply failure when backed by coin-cell or supercapacitor. |
| Package | 400-mil 32-pin TSOP(II), PTSB0032DC-A - surface-mount compatible with automated assembly and offers better thermal dissipation than SOP variants. |
Pinout & Package
Package: 400-mil 32-pin plastic TSOP(II), footprint code PTSB0032DC-A (032PTY-A), tray packaging (117 pcs/tray).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply input | Primary 5V rail connection; requires local 0.1 µF ceramic decoupling adjacent to pin. |
| Vss | Ground reference | Dedicated ground return path; must be connected to system ground plane with low-inductance trace. |
| A0–A18 | Address inputs | 19-bit address bus supporting full 512-kword decoding; A18 is MSB, no internal address multiplexing. |
| I/O0–I/O7 | Bidirectional data bus | Common 8-bit data path with three-state output drivers; high-impedance when CS# or OE# is high. |
| CS# | Chip select (active low) | Enables memory access only when low; controls internal buffers and determines data retention entry when high. |
| WE# | Write enable (active low) | Asserts write cycle when CS# is low; timing overlap with CS# defines write window per tWP ≥ 40 ns. |
| OE# | Output enable (active low) | Gates read data onto I/O pins; does not affect write operations; supports OE#-clocked or OE#-fixed write modes. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for dual-rail regulators or level shifters in 5V-centric industrial designs. |
| Low standby power dissipation | 0.1 µA typical at +25°C enables >10-year coin-cell backup life in tamper-proof logging devices. |
| TTL-compatible I/O levels | VIH = 2.2V min and VOL = 0.4V max ensure robust noise margin and direct connection to 74LS/HC logic families. |
| Asynchronous parallel interface | No clock required - simplifies timing design and avoids clock-domain crossing issues in MCU-based systems. |
| Industrial temperature grade | Qualified from -40°C to +85°C per JEDEC JESD22-A108, suitable for under-hood or factory-floor deployment. |
Applications
| Industrial PLC Data Buffer | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing transient sensor readings and actuator command history during CAN bus arbitration delays. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access for real-time control loop buffering. Use Value: 55 ns access time ensures deterministic response within 100 µs control cycles; 2.0V data retention preserves state during ignition cycling. |
Use Scenario: Holding door lock status, mirror position, and seat memory settings during vehicle power-down. IC Role / Device Role / Timing Role: Battery-backed memory storing user-configurable parameters with guaranteed data integrity across 10+ year service life. Use Value: 0.1 µA standby current extends CR2032 battery life beyond 12 years; TSOP package fits compact BCM PCB layouts. |
| Smart Energy Meter Firmware Cache | Medical Infusion Pump Event Log |
|
Use Scenario: Caching tariff tables and billing intervals during utility communication blackouts. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding critical firmware segments accessible during bootloader recovery sequences. Use Value: Direct TTL compatibility eliminates level-shifter components; 4.5–5.5V supply range accommodates wide-input DC-DC outputs. |
Use Scenario: Recording dose delivery timestamps, error codes, and calibration events for FDA audit compliance. IC Role / Device Role / Timing Role: Tamper-resistant data logger with hardware-enforced write protection via CS#/WE# timing constraints. Use Value: -40°C to +85°C rating supports sterilization and cold-chain transport; 32-pin TSOP allows conformal coating over entire device. |
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-55ZAXI | 4-Mbit, 55 ns, 32-pin TSOP, but requires 2.2–5.5V supply and has higher ISB (1 µA typ). | Supports wider voltage range but lacks guaranteed 2.0V data retention; less suitable for coin-cell backup. | Select when mixed-voltage system integration is needed and standby current <1 µA is acceptable. |
| AS6C4008-55TIN | 4-Mbit, 55 ns, 32-pin TSOP, 4.5–5.5V supply, ISB = 1 µA typ, no specified data retention below 3.0V. | Lower cost but unqualified for sub-3V retention; not recommended for battery-failover-critical systems. | Choose for cost-sensitive industrial HMI where continuous 5V supply is assured and backup is optional. |
Compared with CY62148EV30LL-55ZAXI and AS6C4008-55TIN, the R1LP0408DSB-5SI#B0 uniquely delivers 2.0V data retention and 0.1 µA standby current in an industrial-grade TSOP package-making it the only option among the three qualified for long-term battery-backed operation in safety-critical edge nodes.
Availability
R1LP0408DSB-5SI#B0 is available at Aetrix Electronics and suitable for industrial PLC data buffering, automotive body control modules, and smart energy meter firmware caching requiring stable component supply across extended product lifecycles.
Supply support for R1LP0408DSB-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 specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The R1LP0408D Series was designed specifically for low-power, battery-backed parallel SRAM applications in industrial and automotive systems requiring guaranteed data retention, wide temperature operation, and direct TTL interfacing.
FAQ
What is the minimum supply voltage required to retain data in R1LP0408DSB-5SI#B0?
The R1LP0408DSB-5SI#B0 guarantees data retention down to 2.0V on Vcc when CS# is held high (≥ Vcc − 0.2V). This specification is validated per the Low Vcc Data Retention Characteristics table on page 11 of the R10DS0104EJ0200 datasheet, enabling reliable operation during brown-out or battery switchover scenarios without external supervision circuitry.
Does R1LP0408DSB-5SI#B0 support true three-state output behavior during write cycles?
Yes, the R1LP0408DSB-5SI#B0 maintains three-state output behavior during writes: when WE# and CS# are both low but OE# is high, the I/O pins remain in high-impedance state regardless of data direction. This is confirmed in the Operation Table (page 4) and Write Cycle timing diagrams (pages 9–10), preventing bus contention in shared-data-bus architectures.
What is the maximum allowable input voltage on address pins for R1LP0408DSB-5SI#B0?
The absolute maximum input voltage on any pin-including A0–A18-is Vcc + 0.3V (with Vcc ≤ 7.0V), per Absolute Maximum Ratings (page 4). Under normal DC operating conditions, VIH must be ≥ 2.2V and ≤ Vcc + 0.3V, while VIL must be ≤ 0.8V. Transient pulses ≤ 30ns may reach −3.0V, but sustained violation risks permanent damage.
Is R1LP0408DSB-5SI#B0 pin-compatible with other members of the R1LP0408D Series?
Yes, all R1LP0408D Series variants-including R1LP0408DSB-5SI#B0, R1LP0408DSB-7SI#B0, and R1LP0408DSP-5SI#B0-share identical 32-pin TSOP(II) or SOP pinouts and signal assignments. The only differences are access time (55 ns vs. 70 ns) and temperature grade (I-version = −40°C to +85°C), making them functionally interchangeable in layout-constrained designs.
What is the typical standby current of R1LP0408DSB-5SI#B0 at +85°C?
The typical standby current of R1LP0408DSB-5SI#B0 at +85°C is 1 µA, with a maximum specified value of 10 µA (ISB1 parameter, page 5). This value reflects worst-case leakage across process/voltage/temperature corners and is measured with CS# ≥ Vcc − 0.2V and all other inputs at Vss or Vcc.
R1LP0408DSB-5SI#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.400", 10.16mm 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:
- 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-TSOP II
R1LP0408DSB-5SI#B0 FAQ
1.How can I place an order for R1LP0408DSB-5SI#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-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 R1LP0408DSB-5SI#B0 reliable?
The price and inventory of R1LP0408DSB-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 R1LP0408DSB-5SI#B0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-5SI#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-5SI#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-5SI#B0?
R1LP0408DSB-5SI#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-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 R1LP0408DSB-5SI#B0?
For technical support, including R1LP0408DSB-5SI#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-5SI#B0 requirements.
6.How does Aetrix verify that R1LP0408DSB-5SI#B0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-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 R1LP0408DSB-5SI#B0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-5SI#B0?
All R1LP0408DSB-5SI#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-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 R1LP0408DSB-5SI#B0 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-5SI#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSB-5SI#B0 Tags
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