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Renesas R1LP0408DSB-7SR#S0
- Part No.:
- R1LP0408DSB-7SR#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-7SR#S0.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:4,778
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Product details
Overview
R1LP0408DSB-7SR#S0 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 battery backup capability - used in embedded controllers and real-time data logging systems requiring non-volatile SRAM retention during power loss.
For engineers reviewing the R1LP0408DSB-7SR#S0 datasheet, R1LP0408DSB-7SR#S0 pinout, R1LP0408DSB-7SR#S0 application, or R1LP0408DSB-7SR#S0 equivalent, key selection criteria include TSOP-II package compatibility, 32-pin address/data multiplexing support, TTL-level I/O interface, low-Vcc data retention down to 2.0V, and industrial temperature range (0°C to +70°C) operation.
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 three-state bidirectional I/O lines with separate chip select (CS#), write enable (WE#), and output enable (OE#) controls to manage read/write cycles and high-impedance states.
Timing is governed by synchronous pulse generation for read and write cycles, supporting equal access and cycle times. The device supports two write modes - OE# clocked and OE# low fixed - with defined setup/hold and overlap timing constraints including tDW (25ns min), tWP (50ns min), and tWHZ (25ns max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 4 Mbit (512 kwords × 8 bits) - supports 64KB byte-addressable buffer space in microcontroller systems. |
| Access time | 70 ns max - defines maximum latency between address valid and stable data output under worst-case Vcc/temperature conditions. |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard TTL/CMOS 5V logic rails without level shifting. |
| Standby current | 0.1 μA typ at +25°C - enables multi-year battery backup in SRAM-based real-time clocks or configuration storage. |
| Data retention Vcc | 2.0 V min - maintains stored data during brown-out or battery decay without external refresh circuitry. |
| Operating temperature | 0°C to +70°C - qualified for commercial/industrial control applications excluding extended automotive or military environments. |
| Package type | 400-mil 32-pin TSOP(II) - surface-mount footprint compatible with automated PCB assembly and thermal management up to 150°C peak reflow. |
Pinout & Package
Package: 400-mil 32-pin plastic TSOP(II), part code PTSB0032DC-A (032PTY-A), JEDEC-compliant outline with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply input | Primary 5V supply rail; requires local 0.1μF ceramic decoupling adjacent to pin. |
| Vss | Ground reference | Digital ground return path; must be connected to system ground plane with low-inductance trace. |
| A0–A18 | Address inputs | 19-bit address bus supporting full 512k-word addressing; A18 is MSB for top-half memory bank selection. |
| I/O0–I/O7 | Bidirectional data bus | 8-bit multiplexed data path; tri-stated when CS# high or OE# high during read/write control transitions. |
| CS# | Chip select (active-low) | Enables memory array access; controls internal buffers and initiates data retention mode when high during low-Vcc conditions. |
| WE# | Write enable (active-low) | Asserts write cycle; latches data on I/O lines when CS# is also low; determines write start/end timing per AC specs. |
| OE# | Output enable (active-low) | Controls output driver state; high-Z when high, active drive when low during read cycles - enables bus sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V supply operation | Eliminates need for dual-rail regulators or charge pumps in legacy 5V systems, reducing BOM count and layout complexity. |
| Low standby power dissipation | 0.1 μA typical at +25°C enables >10-year coin-cell battery life in always-on backup applications without periodic refresh. |
| TTL-compatible I/O levels | VIH = 2.2V min and VOL = 0.4V max ensure direct interfacing with 74LS/74HC logic families without level translators. |
| Equal access and cycle times | 70ns tRC = tAA simplifies timing budget allocation in synchronous bus designs and avoids pipeline stalls. |
| Common data I/O with three-state control | Reduces PCB trace count by 50% vs. separate DQ/DIN pins; OE#/CS# coordination prevents bus contention during mixed read/write sequences. |
Applications
| Industrial PLC Data Buffer | Medical Device Configuration Storage |
|---|---|
|
Use Scenario: Storing runtime I/O mapping tables and alarm history in programmable logic controllers during mains power interruption. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer maintaining critical state data with zero refresh overhead during brown-out events. Use Value: Enables deterministic recovery within 5ms after power restoration using retained register contents - no firmware reload or calibration required. |
Use Scenario: Holding patient-specific calibration parameters and last-used operational settings in portable ultrasound units powered by rechargeable batteries. IC Role / Device Role / Timing Role: Battery-backed memory preserving configuration across sleep/wake cycles and unplanned shutdowns. Use Value: Achieves <1μA standby draw enabling >30-day shelf life on single charge while retaining FDA-required audit trail metadata. |
| Automotive Telematics Event Logger | Test Equipment Real-Time Trace Buffer |
|
Use Scenario: Capturing CAN bus diagnostic frames and GPS timestamps during vehicle crash events where main power fails abruptly. IC Role / Device Role / Timing Role: High-speed SRAM acting as circular buffer with hardware-triggered freeze-on-fault capability. Use Value: Guarantees capture of 256KB pre-crash telemetry at 1MHz sampling rate using 70ns access to sustain burst writes without FIFO overflow. |
Use Scenario: Aggregating high-resolution analog waveform samples from oscilloscope front-ends before transfer to host PC via USB. IC Role / Device Role / Timing Role: Low-latency memory staging area synchronizing ADC output with DMA controller handshaking. Use Value: Supports sustained 10MS/s sampling over 40ms window (400k samples) with deterministic 70ns read latency for post-capture analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62148EV30LL-70ZSXIT | 4Mb, 70ns, 32-pin SOIC (not TSOP); 1μA ISB typ; supports 2.2–5.5V supply. | SOIC package requires different PCB footprint and has higher thermal resistance than TSOP. | Select when board redesign allows SOIC placement and wider Vcc tolerance is needed for mixed-supply systems. |
| IS61LV5128AL-70TQLI | 4Mb, 70ns, 32-pin TSOP(II); 1μA ISB typ; 3.0–3.6V only - not 5V compatible. | Requires 3.3V regulator; incompatible with legacy 5V bus interfaces without level translation. | Choose only in new 3.3V designs where lower active current (15mA Icc vs. 10mA) justifies voltage rail change. |
Compared with R1LP0408DSB-7SR#S0, CY62148EV30LL-70ZSXIT offers broader voltage range but lacks TSOP-II footprint compatibility, while IS61LV5128AL-70TQLI matches the package but mandates 3.3V operation - making R1LP0408DSB-7SR#S0 the sole drop-in 5V TSOP solution for industrial retrofits requiring minimal layout change.
Availability
R1LP0408DSB-7SR#S0 is available at Aetrix Electronics and suitable for industrial PLC data buffering, medical device configuration storage, automotive event logging, and test equipment trace capture requiring stable component supply across long production lifecycles.
Supply support for R1LP0408DSB-7SR#S0 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 is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.
The R1LP0408D Series was designed specifically for battery-backed SRAM applications demanding ultra-low standby current, 5V compatibility, and industrial temperature reliability - targeting legacy system upgrades and mission-critical data retention.
FAQ
What is the minimum Vcc required to retain data in R1LP0408DSB-7SR#S0?
The R1LP0408DSB-7SR#S0 guarantees data retention down to 2.0V Vcc when CS# is held high and ambient temperature remains ≤+70°C. At 3.0V, typical data retention current is 0.8–1μA depending on temperature, enabling multi-year operation on primary lithium cells. This specification is verified per the Low Vcc Data Retention Characteristics table on page 11 of the R10DS0104EJ0200 datasheet.
Does R1LP0408DSB-7SR#S0 support true 5V TTL interface levels?
Yes, R1LP0408DSB-7SR#S0 is directly TTL-compatible: VIH is specified at 2.2V min (exceeding TTL's 2.0V threshold), VIL at 0.8V max, VOH at 2.4V min into -1mA load, and VOL at 0.4V max into 2.1mA load. All inputs and outputs meet standard TTL voltage thresholds across the full 4.5–5.5V supply range and 0°C to +70°C operating temperature.
What is the maximum operating frequency supported by R1LP0408DSB-7SR#S0?
R1LP0408DSB-7SR#S0 does not specify a maximum clock frequency because it is an asynchronous SRAM. Its performance is defined by timing parameters: 70ns max access time (tAA), 70ns max read cycle time (tRC), and 70ns max write cycle time (tWC). These values set the upper bound for sustained random-access throughput - approximately 14.3 MHz effective bandwidth under ideal bus conditions.
Can R1LP0408DSB-7SR#S0 be used in place of R1LP0408DSP-7SR#S*?
No - R1LP0408DSB-7SR#S0 uses a 400-mil 32-pin TSOP(II) package (PTSB0032DC-A), while R1LP0408DSP-7SR#S* uses a 525-mil 32-pin SOP package (PRSP0032DF-A). Though electrically identical and sharing pin functions, their footprints, thermal profiles, and mounting requirements differ significantly; PCB layout revision is required for substitution.
What are the key timing differences between R1LP0408DSB-7SR#S0 and the -5SR variant?
The R1LP0408DSB-7SR#S0 has 70ns max access time (tAA), read cycle time (tRC), and write cycle time (tWC), versus 55ns for the -5SR variant. Other timing parameters scale proportionally: tOE is 35ns vs. 25ns, tCW is 60ns vs. 50ns, and tWP is 50ns vs. 40ns. All DC specs, package, and pinout remain identical - the -7SR variant trades speed for cost and margin in less timing-critical applications.
R1LP0408DSB-7SR#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-SOIC (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TSOP II
R1LP0408DSB-7SR#S0 FAQ
1.How can I place an order for R1LP0408DSB-7SR#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-7SR#S0 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-7SR#S0 reliable?
The price and inventory of R1LP0408DSB-7SR#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408DSB-7SR#S0 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-7SR#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-7SR#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-7SR#S0?
R1LP0408DSB-7SR#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-7SR#S0 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-7SR#S0?
For technical support, including R1LP0408DSB-7SR#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-7SR#S0 requirements.
6.How does Aetrix verify that R1LP0408DSB-7SR#S0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-7SR#S0 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-7SR#S0 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-7SR#S0?
All R1LP0408DSB-7SR#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-7SR#S0, 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-7SR#S0 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-7SR#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSB-7SR#S0 Tags
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