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Renesas R1LP0408DSB-5SI#B1
- Part No.:
- R1LP0408DSB-5SI#B1
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-5SI#B1.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
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Product details
Overview
R1LP0408DSB-5SI#B1 from Renesas Electronics is a 4Mb 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 R1LP0408DSB-5SI#B1 datasheet, R1LP0408DSB-5SI#B1 pinout, R1LP0408DSB-5SI#B1 application, or R1LP0408DSB-5SI#B1 equivalent, key selection criteria include standby current at elevated temperature, TSOP-II package footprint compatibility, TTL-level I/O compatibility, and data retention down to 2.0 V VCC.
Technical Context
The R1LP0408DSB-5SI#B1 implements a 2,048 × 2,048 memory matrix with full CMOS address and data buffers, supporting asynchronous read/write cycles with equal tRC and tWC of 55 ns. Its control logic uses active-low CS#, WE#, and OE# with three-state output drivers and high-impedance hold during chip deselect.
It features dual-mode write operation-supporting both OE#-gated (clocked) and OE#-low-fixed configurations-and guarantees data retention at VCC ≥ 2.0 V when CS# is held high, enabling seamless battery switchover without external supervision circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512-kword × 8-bit); supports byte-wide data bus interfacing without external multiplexing |
| Access time | 55 ns max; ensures compatibility with 18 MHz bus timing in legacy microcontroller systems |
| Standby current | 1 µA typ. at +25°C; enables >10-year battery life in coin-cell–powered RTC backup |
| Supply voltage | 4.5–5.5 V; operates directly from standard 5 V rail without LDO regulation |
| Data retention VCC | 2.0 V min; maintains SRAM contents during brown-out or main power loss |
| I/O interface | Common bidirectional I/O0–I/O7 with three-state output; eliminates need for external transceivers |
| Input compatibility | TTL-compatible inputs (VIH = 2.2 V min, VIL = 0.8 V max); interfaces directly with 5 V logic families |
Pinout & Package
Package: 400-mil 32-pin plastic TSOP (II), JEDEC MO-141AC compliant, 12.0 mm × 20.0 mm footprint, 0.5 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 5 V supply input; decoupling capacitor required within 10 mm |
| Vss | Ground | Digital ground reference; must be connected to system GND plane with low-inductance path |
| A0–A18 | Address input | 19-bit address bus; A18 enables full 512-kword addressing (219 = 524,288 words) |
| I/O0–I/O7 | Data input/output | Bidirectional 8-bit data bus; high-impedance when CS# or OE# is high |
| CS# | Chip select | Active-low enable; controls internal buffers and initiates data retention mode when high |
| WE# | Write enable | Active-low write strobe; latches data on falling edge when CS# is asserted |
| OE# | Output enable | Active-low output gate; places I/O pins in high-Z when deasserted during reads |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low standby current | 1 µA typical at +25°C; reduces annual battery drain to <1.5 mAh in always-on backup mode |
| Single-supply 5 V operation | No auxiliary voltage rails needed; simplifies PCB power architecture and BOM |
| Asynchronous interface | No clock signal required; eliminates timing constraints from master controller clock domain |
| Direct TTL compatibility | Eliminates level-shifting components when interfacing with legacy 5 V microcontrollers and FPGAs |
| Low-voltage data retention | Maintains valid data at VCC = 2.0 V; supports seamless transition to backup battery without data loss |
Applications
| Industrial PLC Data Buffer | Real-Time Clock Backup Memory |
|---|---|
Use Scenario: Storing configuration registers and last-known sensor states during mains power interruption in programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer holding critical runtime state; retains data across 100+ ms brown-outs. Use Value: Enables deterministic recovery after power loss without requiring EEPROM write cycles or firmware reinitialization. | Use Scenario: Preserving time-of-day, calendar, and alarm settings in battery-powered RTC modules during AC power failure. IC Role / Device Role / Timing Role: Low-leakage memory bank directly backed by CR2032 coin cell; operates in retention mode below 2.0 V VCC. Use Value: Guarantees >10-year data retention on 220 mAh coin cell at +25°C with no refresh overhead. |
| Medical Device Event Log | Automotive Body Control Module |
Use Scenario: Capturing diagnostic fault codes and timestamped event logs in portable ultrasound and infusion pumps. IC Role / Device Role / Timing Role: High-reliability, fast-access memory for cyclic logging; withstands -40°C to +85°C ambient range. Use Value: Provides deterministic 55 ns read latency for real-time log retrieval without flash wear-out concerns. | Use Scenario: Storing door lock status, window position, and mirror calibration in automotive body control units. IC Role / Device Role / Timing Role: Battery-backed SRAM retaining user preferences across ignition cycles; powered via vehicle backup rail. Use Value: Eliminates EEPROM endurance limitations (100k cycle limit) while maintaining automotive-grade temperature compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 256K × 16-bit organization; 10 ns access; 3.3 V only; 44-pin TSOP | Higher density but incompatible bus width and voltage; requires level translation and layout change | Select only if migrating to 3.3 V system with wider data bus and faster timing budget |
| AS6C4008-55TIN | 4Mb × 8-bit; 55 ns access; 5 V supply; 32-pin SOP (not TSOP); ISB = 2 µA typ. | Same logic and timing but different package; SOP footprint incompatible with TSOP PCB land pattern | Use only for new designs where SOP mounting is acceptable and board space allows larger package |
Compared with R1LP0408DSB-5SI#B1, the IS61LV25616AL-10TLI offers higher speed but demands full voltage and interface redesign, while the AS6C4008-55TIN matches electrical specs but requires mechanical rework due to SOP vs. TSOP packaging-neither is drop-in compatible.
Availability
R1LP0408DSB-5SI#B1 is available at Aetrix Electronics and suitable for industrial PLC data buffering, real-time clock backup, and medical device event logging requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for R1LP0408DSB-5SI#B1 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The R1LP0408D Series was developed specifically for battery-critical applications demanding ultra-low standby power, guaranteed data retention at reduced VCC, and industrial temperature resilience-targeting backup memory in mission-critical embedded systems.
FAQ
What is the maximum operating temperature range for the R1LP0408DSB-5SI#B1?
The R1LP0408DSB-5SI#B1 is rated for continuous operation from -40°C to +85°C ambient temperature. This industrial-grade specification is validated per the Absolute Maximum Ratings table and DC Operating Conditions section of the R10DS0274EJ0200 datasheet, making it suitable for deployment in harsh environments such as factory automation controllers and automotive under-hood modules.
Does the R1LP0408DSB-5SI#B1 support true data retention at 2.0 V VCC?
Yes, the R1LP0408DSB-5SI#B1 guarantees data retention at VCC as low as 2.0 V when CS# is held high (≥ VCC − 0.2 V), as specified in the Low Vcc Data Retention Characteristics table on page 11 of the R10DS0274EJ0200 datasheet. This enables reliable operation during brown-out conditions without external supervision circuitry.
Is the R1LP0408DSB-5SI#B1 pin-compatible with other devices in the R1LP0408D Series?
Yes, all members of the R1LP0408D Series-including R1LP0408DSP-5SI#B*, R1LP0408DSB-5SI#S*, and R1LP0408DSB-5SI#B1-share identical 32-pin TSOP (II) or SOP pinouts and functionally equivalent pin assignments. The R1LP0408DSB-5SI#B1 uses the same TSOP pin mapping shown on page 2 of the datasheet, ensuring mechanical and electrical interchangeability within the family.
What is the typical standby current of the R1LP0408DSB-5SI#B1 at +85°C?
At +85°C, the R1LP0408DSB-5SI#B1 exhibits a typical standby current (ISB1) of 10 µA, as documented in the DC Characteristics table on page 5 of the R10DS0274EJ0200 datasheet. This value reflects worst-case thermal leakage and remains well within design margins for multi-year battery operation in thermally stressed environments.
Can the R1LP0408DSB-5SI#B1 be used with 3.3 V logic interfaces?
No, the R1LP0408DSB-5SI#B1 is strictly a 5 V-only device with VIH minimum of 2.2 V and VIL maximum of 0.8 V-designed for TTL/5 V CMOS compatibility. It does not support 3.3 V I/O signaling, and direct connection to 3.3 V controllers requires level-shifting circuitry to avoid violating input voltage specifications.
R1LP0408DSB-5SI#B1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.400", 10.16mm Width)
- Packaging:
- Tray
- 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#B1 FAQ
1.How can I place an order for R1LP0408DSB-5SI#B1 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-5SI#B1 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#B1 reliable?
The price and inventory of R1LP0408DSB-5SI#B1 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#B1 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-5SI#B1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-5SI#B1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-5SI#B1?
R1LP0408DSB-5SI#B1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-5SI#B1 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#B1?
For technical support, including R1LP0408DSB-5SI#B1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-5SI#B1 requirements.
6.How does Aetrix verify that R1LP0408DSB-5SI#B1 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-5SI#B1 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#B1 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-5SI#B1?
All R1LP0408DSB-5SI#B1 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-5SI#B1, 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#B1 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-5SI#B1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSB-5SI#B1 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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