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Renesas R1LP0408DSB-5SR#B0
- Part No.:
- R1LP0408DSB-5SR#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-5SR#B0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:1,350
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Product details
Overview
R1LP0408DSB-5SR#B0 from Renesas Electronics is a 4-Mbit advanced low-power static RAM organized as 512-kword × 8-bit, operating on a single 5V supply (4.5–5.5V), with 55 ns max access time, 0.1 µA typical standby current at +25°C, and TTL-compatible I/O. It supports battery backup operation and is used in embedded systems requiring non-volatile data retention during power loss.
For engineers reviewing the R1LP0408DSB-5SR#B0 datasheet, R1LP0408DSB-5SR#B0 pinout, R1LP0408DSB-5SR#B0 application, or R1LP0408DSB-5SR#B0 equivalent, key selection criteria include low-standby-current SRAM for battery-backed memory buffers, 32-pin TSOP(II) footprint compatibility, and verified 55 ns read/write timing under industrial temperature range (0 to +70°C).
Technical Context
The R1LP0408DSB-5SR#B0 implements a 2,048 × 2,048 memory matrix with full address decoding across A0–A18, supporting common I/O architecture with three-state outputs controlled by CS#, WE#, and OE#. Its timing pulse generator ensures equal access and cycle times, enabling deterministic read/write behavior without internal refresh.
Designed for low-power retention, it maintains data integrity down to Vcc = 2.0 V with <10 µA data retention current at +85°C and zero chip deselect delay (tCDR = 0 ns) into retention mode. All inputs and outputs meet TTL voltage thresholds (VIH ≥ 2.2 V, VOL ≤ 0.4 V at IOL = 2.1 mA), ensuring direct interface with legacy microcontrollers and logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512 kwords × 8 bits) - provides byte-wide storage for firmware buffers or real-time data logging |
| Access time | 55 ns (max) - enables reliable interfacing with 12–15 MHz bus clocks without wait states |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard 5V logic rails and tolerant of ±10% regulation drift |
| Standby current | 0.1 µA (typ @ +25°C) - extends battery life to years in always-on backup applications |
| Operating temperature | 0°C to +70°C - qualified for commercial/industrial control panels and instrumentation |
| Package | 400-mil 32-pin TSOP(II), PTSB0032DC-A - surface-mount compatible with automated assembly and thermal cycling reliability |
| Data retention voltage | 2.0 V minimum - sustains stored data during brown-out or backup battery discharge |
Pinout & Package
Package: 400-mil 32-pin plastic TSOP(II), type PTSB0032DC-A (032PTY-A), tray-packed (117 pcs/tray).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | +5V main supply rail; decoupling capacitor required within 10 mm |
| Vss | Ground | Signal reference and return path; must be connected to system ground plane |
| A0–A18 | Address input | 19-bit address bus; fully decoded to select one of 524,288 bytes |
| I/O0–I/O7 | Data input/output | Bi-directional 8-bit data bus; high-impedance when CS# or OE# inactive |
| CS# | Chip select | Active-low enable; places device in standby (<0.5 mA) when high |
| WE# | Write enable | Active-low write strobe; latches data on falling edge with CS# asserted |
| OE# | Output enable | Active-low output gate; controls three-state driver for read data only |
Key Features
| Feature | Design Value |
|---|---|
| Battery backup support | Retains data at Vcc ≥ 2.0 V with ICCDR ≤ 10 µA up to +85°C - eliminates need for external backup controllers |
| TTL-compatible I/O | VIH = 2.2 V min, VOL = 0.4 V max at 2.1 mA - interfaces directly with 5V microcontrollers without level shifters |
| Equal tRC and tAA | 55 ns read cycle time matches address access time - simplifies timing budgeting in synchronous bus designs |
| Low-impedance output drive | tOLZ = 5 ns, tCLZ = 10 ns - ensures fast data valid window for high-speed CPU reads |
| No refresh required | True static RAM architecture - eliminates refresh overhead and associated bus contention in real-time systems |
Applications
| Industrial PLC Data Buffer | Medical Device Event Log |
|---|---|
Use Scenario: Stores runtime I/O state snapshots and alarm timestamps during mains power interruption. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer holding critical operational history until safe shutdown or recovery. Use Value: Guarantees zero-data-loss logging via 2.0 V data retention and sub-µA standby draw, extending backup battery life beyond 5 years. |
Use Scenario: Captures patient vital sign sequences and diagnostic events in portable monitors with intermittent power. IC Role / Device Role / Timing Role: Byte-accessible memory for time-stamped waveform metadata and error codes. Use Value: Enables deterministic 55 ns read access for real-time display updates while consuming <0.1 µA in sleep mode. |
| Point-of-Sale Terminal Configuration | Telecom Line Card Status Cache |
Use Scenario: Holds tax tables, pricing rules, and user preferences across power cycles in retail terminals. IC Role / Device Role / Timing Role: Fast-access configuration store mapped into microcontroller memory space. Use Value: Eliminates EEPROM wear-out concerns and reduces boot latency with zero-refresh static operation. |
Use Scenario: Caches port status, link diagnostics, and fault counters in carrier-grade line cards. IC Role / Device Role / Timing Role: Low-power shadow RAM synchronized with FPGA control logic. Use Value: Provides 32-pin TSOP footprint compatibility with existing board layouts and meets -40°C to +85°C extended temp variants. |
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 supply only | Higher density but incompatible voltage and bus width; requires level translation and layout change | Select only if migrating to 3.3 V systems with wider data paths and faster timing margins |
| CY62128EV30LL-45ZSXIT | 128K × 8-bit, 45 ns access, 2.5–5.5 V supply, industrial temp | Lower capacity (1 Mbit), same 8-bit interface and 5V tolerance, but no sub-µA standby spec | Use where cost-sensitive designs accept higher standby current (1 µA typ) and reduced memory depth |
Compared with R1LP0408DSB-5SR#B0, IS61LV25616AL-10TLI offers speed and density at the cost of voltage and interface compatibility, while CY62128EV30LL-45ZSXIT trades capacity and ultra-low standby for broader supply flexibility and lower unit cost in volume production.
Availability
R1LP0408DSB-5SR#B0 is available at Aetrix Electronics and suitable for industrial control panels, medical data loggers, and point-of-sale terminals requiring stable component supply, long-lifecycle support, and guaranteed TSOP(II) package continuity.
Supply support for R1LP0408DSB-5SR#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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The R1LP0408D Series was designed as an advanced LPSRAM family targeting battery-backed memory applications in space-constrained, low-power embedded systems - emphasizing ultra-low standby current, TTL compatibility, and industrial temperature resilience.
FAQ
What is the maximum operating frequency supported by R1LP0408DSB-5SR#B0?
R1LP0408DSB-5SR#B0 does not operate on a clock signal; it is an asynchronous SRAM. Its 55 ns access time corresponds to a maximum effective bus frequency of approximately 12–15 MHz when interfaced with microcontrollers or FPGAs using standard read/write strobes. Timing is governed by tRC (55 ns), tAA (55 ns), and tWC (55 ns), not a clock domain.
Does R1LP0408DSB-5SR#B0 require an external refresh circuit?
No, R1LP0408DSB-5SR#B0 is a true static RAM and requires no refresh cycles. Its CMOS latch-based memory cells retain data indefinitely as long as Vcc remains within specification and CS# is held high during standby. This eliminates refresh overhead, timing complexity, and bus contention in real-time systems.
Can R1LP0408DSB-5SR#B0 be used with a 3.3 V microcontroller interface?
R1LP0408DSB-5SR#B0 is specified for 4.5–5.5 V operation and is not 3.3 V tolerant. Direct connection to a 3.3 V microcontroller risks violating VIH (min 2.2 V) and VOL (max 0.4 V) specifications under load. Level-shifting circuitry or a 5 V I/O domain is required to ensure reliable communication with R1LP0408DSB-5SR#B0.
What is the data retention capability of R1LP0408DSB-5SR#B0 at low voltage?
R1LP0408DSB-5SR#B0 retains stored data down to Vcc = 2.0 V with ICCDR ≤ 10 µA at +85°C. At +25°C, typical data retention current is 0.8 µA. The device enters retention mode immediately upon CS# going high, with zero chip deselect delay (tCDR = 0 ns), making it ideal for battery-backed applications where voltage may sag during backup.
Is R1LP0408DSB-5SR#B0 RoHS compliant?
Yes, R1LP0408DSB-5SR#B0 is RoHS compliant per Renesas documentation (R10DS0104EJ0200 Rev.2.00). It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and meets EU Directive 2011/65/EU requirements for hazardous substances in electrical equipment.
R1LP0408DSB-5SR#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.400", 10.16mm Width)
- Packaging:
- Tray
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP II
R1LP0408DSB-5SR#B0 FAQ
1.How can I place an order for R1LP0408DSB-5SR#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-5SR#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-5SR#B0 reliable?
The price and inventory of R1LP0408DSB-5SR#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-5SR#B0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-5SR#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-5SR#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-5SR#B0?
R1LP0408DSB-5SR#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-5SR#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-5SR#B0?
For technical support, including R1LP0408DSB-5SR#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-5SR#B0 requirements.
6.How does Aetrix verify that R1LP0408DSB-5SR#B0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-5SR#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-5SR#B0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-5SR#B0?
All R1LP0408DSB-5SR#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-5SR#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-5SR#B0 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-5SR#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSB-5SR#B0 Tags
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AT24C02C-XHM-T
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