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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Renesas R1LP0408DSP-7SI#S0

Name: R1LP0408DSP-7SI#S0
Brand: Renesas
SKU: R1LP0408DSP-7SI#S0
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: R1LP0408DSP-7SI#S0

Manufacturer:: Renesas

Category:: Memory

Package:: 32-SOIC (0.450", 11.40mm Width)

Datasheet:: R1LP0408DSP-7SI#S0.pdf

Description:: IC SRAM 4MBIT PARALLEL 32SOP

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Product details

Overview

R1LP0408DSP-7SI#S0 from Renesas Electronics is a 4Mb advanced low-power static RAM (512-kword × 8-bit), designed for battery-backed memory applications requiring reliable data retention at reduced V_CC. It operates from a single 5V supply (4.5–5.5V), delivers 70ns max access time, consumes only 0.8–10μA standby current depending on temperature, and is housed in a 32-pin SOP package.

For engineers reviewing the R1LP0408DSP-7SI#S0 datasheet, R1LP0408DSP-7SI#S0 pinout, R1LP0408DSP-7SI#S0 application, or R1LP0408DSP-7SI#S0 equivalent, this device serves as a drop-in replacement for legacy 512K×8 SRAMs in industrial control, medical instrumentation, and real-time data logging systems where low-quiescent power and extended temperature operation (-40°C to +85°C) are critical.

Technical Context

The R1LP0408DSP-7SI#S0 implements a full CMOS static memory architecture with separate address latching, three-state bidirectional I/Os, and TTL-compatible input thresholds. Its timing logic supports simultaneous CS#/OE#/WE# control with equal read/write cycle times and no address setup requirement (t_AS = 0 ns).

It features dual-mode operation: active read/write mode with 5–10mA typical I_CC, and ultra-low-power data retention mode activated by high CS# and V_CC ≥ 2.0V, enabling operation down to 2.0V while maintaining data integrity - confirmed by t_CDR = 0 ns chip deselect-to-retention transition and t_R = 5 ms recovery time.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	4 Mbit (512 kwords × 8 bits) - provides byte-wide interface compatible with 8-bit microcontrollers and legacy bus architectures.
Access time	70 ns (max) - defines worst-case delay from address/CS# valid to valid data output; enables use in systems with ≤14.3 MHz bus clocks.
Supply voltage	4.5 V to 5.5 V - ensures compatibility with standard 5V TTL/CMOS logic families without level-shifting.
Standby current	0.8 μA at +25°C, up to 10 μA at +85°C - enables multi-year battery life in backup memory applications using coin cells or supercapacitors.
Data retention V_CC	2.0 V minimum - allows continued data hold during brown-out or main power loss, critical for nonvolatile state preservation.
Operating temperature	-40°C to +85°C - qualified for industrial-grade deployment in embedded controllers, test equipment, and automotive body electronics.
Package	32-pin SOP (525-mil, PRSP0032DF-A) - surface-mount compatible with standard reflow profiles; pinout matches JEDEC MS-012AC.

Pinout & Package

Package: 32-pin plastic SOP (525-mil width), JEDEC MS-012AC compliant, RoHS-compliant lead finish.

Pin/Terminal	Circuit Role	Design Meaning
Vcc	Power supply	Primary 5V supply rail; must be decoupled locally with 0.1 μF ceramic capacitor.
Vss	Ground	Digital ground reference; requires low-impedance connection to system GND plane.
A0–A18	Address inputs	19-bit address bus supporting full 512K-word decoding; A18 is MSB for 512K×8 configuration.
I/O0–I/O7	Bidirectional data bus	Three-state CMOS I/Os; driven high-Z when CS# or OE# is high; TTL-compatible input thresholds.
CS#	Chip select (active low)	Enables memory array; controls internal buffers and initiates data retention mode when high.
WE#	Write enable (active low)	Controls write cycle initiation; combined with CS# to define write window per t_WP (min 50 ns).
OE#	Output enable (active low)	Gates output drivers; allows read data to appear on I/O lines only when both CS# and OE# are low.

Key Features

Feature	Design Value
Single 5V supply operation	Eliminates need for dual-rail regulators or charge pumps - simplifies power design and reduces BOM count.
Ultra-low standby current	Sub-1μA typical at +25°C enables >10-year coin-cell backup life in always-on monitoring systems.
Direct TTL compatibility	All inputs accept standard TTL voltage levels (VIH ≥ 2.2V, VIL ≤ 0.8V); outputs drive ±1mA loads - no interface logic required.
Zero address setup time	t_AS = 0 ns removes timing constraint on address stability before write - eases FPGA/CPLD interface design.
Guaranteed data retention at 2.0V	Valid operation down to 2.0V V_CC with CS# high ensures data persistence during deep brown-out conditions.

Applications

Industrial PLC Data Buffer	Medical Device Event Log
Use Scenario: Storing real-time sensor readings and fault codes in programmable logic controllers during mains power interruption. IC Role / Device Role / Timing Role: Nonvolatile backup memory holding critical runtime state; retains data during 100ms–5s power gaps. Use Value: Prevents loss of operational history and diagnostic data, enabling post-failure analysis without external NV memory.	Use Scenario: Capturing timestamped ECG waveforms and alarm events in portable patient monitors powered by rechargeable batteries. IC Role / Device Role / Timing Role: Low-leakage SRAM buffer that maintains waveform integrity between host MCU reads and flash writes. Use Value: Extends battery runtime by minimizing active current draw; eliminates need for wear-leveling firmware overhead.
Automotive Body Control Module	Test & Measurement Equipment Cache
Use Scenario: Holding configuration settings and calibration offsets in door module ECUs exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Industrial-temperature SRAM preserving user preferences and adaptive learning parameters across ignition cycles. Use Value: Ensures consistent behavior after cold starts; avoids EEPROM write endurance limitations and latency penalties.	Use Scenario: Acting as acquisition buffer in digital oscilloscopes and logic analyzers capturing high-speed transient signals. IC Role / Device Role / Timing Role: High-speed parallel memory interfaced directly to ADC/FPGA for burst-mode sampling at 10+ MSPS. Use Value: Provides deterministic 70ns read/write latency and zero wait-state operation - essential for real-time trigger processing.

Industrial PLC Data Buffer

Medical Device Event Log

Use Scenario: Storing real-time sensor readings and fault codes in programmable logic controllers during mains power interruption.

IC Role / Device Role / Timing Role: Nonvolatile backup memory holding critical runtime state; retains data during 100ms–5s power gaps.

Use Value: Prevents loss of operational history and diagnostic data, enabling post-failure analysis without external NV memory.

Use Scenario: Capturing timestamped ECG waveforms and alarm events in portable patient monitors powered by rechargeable batteries.

IC Role / Device Role / Timing Role: Low-leakage SRAM buffer that maintains waveform integrity between host MCU reads and flash writes.

Use Value: Extends battery runtime by minimizing active current draw; eliminates need for wear-leveling firmware overhead.

Automotive Body Control Module

Test & Measurement Equipment Cache

Use Scenario: Holding configuration settings and calibration offsets in door module ECUs exposed to under-hood thermal cycling.

IC Role / Device Role / Timing Role: Industrial-temperature SRAM preserving user preferences and adaptive learning parameters across ignition cycles.

Use Value: Ensures consistent behavior after cold starts; avoids EEPROM write endurance limitations and latency penalties.

Use Scenario: Acting as acquisition buffer in digital oscilloscopes and logic analyzers capturing high-speed transient signals.

IC Role / Device Role / Timing Role: High-speed parallel memory interfaced directly to ADC/FPGA for burst-mode sampling at 10+ MSPS.

Use Value: Provides deterministic 70ns read/write latency and zero wait-state operation - essential for real-time trigger processing.

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 (512K×8), 70ns access, 32-pin TSOP-II, V_CC = 2.2–5.5V, ISB = 1μA @ +25°C	Wider V_CC range enables single-supply 3.3V systems; TSOP-II footprint differs from SOP - requires PCB redesign.	Select when migrating to 3.3V logic or needing smaller TSOP package; verify layout compatibility and voltage translation.
IS61LV5128AL-70TLI	4Mb (512K×8), 70ns access, 32-pin SOP, V_CC = 3.0–3.6V, ISB = 2μA @ +25°C	3.3V-only supply; lower standby current than 5V parts but incompatible with 5V buses without level shifters.	Choose for new 3.3V designs prioritizing lowest possible quiescent power; not suitable as direct 5V drop-in replacement.

Compared with CY62148EV30LL-70ZSXIT and IS61LV5128AL-70TLI, the R1LP0408DSP-7SI#S0 uniquely combines 5V tolerance, industrial temperature rating, SOP packaging, and sub-1μA standby - making it optimal for retrofitting legacy 5V systems requiring long-term data retention without board changes.

Availability

R1LP0408DSP-7SI#S0 is available at Aetrix Electronics and suitable for industrial control, medical instrumentation, and test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R1LP0408DSP-7SI#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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT applications.

The R1LP0408D Series was developed as an advanced LPSRAM family targeting battery-backed memory in space-constrained, thermally demanding environments - emphasizing ultra-low standby power and guaranteed data retention down to 2.0V.

FAQ

What is the maximum operating temperature range for R1LP0408DSP-7SI#S0?

The R1LP0408DSP-7SI#S0 is rated for operation from -40°C to +85°C, as indicated by the "I" suffix in its part number. This industrial temperature grade is validated per the Absolute Maximum Ratings and DC Operating Conditions tables in the R10DS0104EJ0200 datasheet, ensuring reliable performance in harsh environments such as factory automation and outdoor instrumentation where thermal cycling occurs.

Does R1LP0408DSP-7SI#S0 support true 5V TTL interface without level shifting?

Yes, R1LP0408DSP-7SI#S0 is fully TTL-compatible: VIH is specified at 2.2V (min) and VIL at 0.8V (max), matching standard 5V TTL logic thresholds. Its outputs drive VOH ≥ 2.4V at -1mA and VOL ≤ 0.4V at 2.1mA, allowing direct connection to 74LS, 74HC, and microcontroller GPIOs without external level translators.

What is the minimum V_CC required to retain data in R1LP0408DSP-7SI#S0?

The R1LP0408DSP-7SI#S0 guarantees data retention down to V_CC = 2.0V when CS# is held high, as specified in the Low V_CC Data Retention Characteristics table. At this voltage, ICCDR remains ≤10μA up to +85°C, enabling robust operation during brown-out conditions common in battery-powered systems.

Is R1LP0408DSP-7SI#S0 pin-compatible with other 32-pin SOP SRAMs like the AS6C4008?

R1LP0408DSP-7SI#S0 uses the industry-standard 32-pin SOP pinout (PRSP0032DF-A) with identical signal mapping (A0–A18, I/O0–I/O7, CS#, WE#, OE#, Vcc, Vss) as AS6C4008 and similar 512K×8 SRAMs. However, timing parameters differ - confirm t_AA, t_RC, and t_WP compatibility in your system's timing budget before substitution.

What packaging and shipping options are available for R1LP0408DSP-7SI#S0?

R1LP0408DSP-7SI#S0 is supplied in embossed tape and reel format: 1000 pieces per reel. The "S" suffix in the part number explicitly denotes tape-and-reel packaging, while the "B" suffix would indicate tube packaging. This format supports automated SMT assembly and is compatible with standard pick-and-place equipment.

R1LP0408DSP-7SI#S0 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 32-SOIC (0.450", 11.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

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:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-SOP

R1LP0408DSP-7SI#S0 FAQ

1.How can I place an order for R1LP0408DSP-7SI#S0 through Aetrix?

Please submit a Request for Quotation (RFQ) for R1LP0408DSP-7SI#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 R1LP0408DSP-7SI#S0 reliable?

The price and inventory of R1LP0408DSP-7SI#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408DSP-7SI#S0 is usually 5 days.

3.What payment methods are accepted for R1LP0408DSP-7SI#S0?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSP-7SI#S0 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for R1LP0408DSP-7SI#S0?

R1LP0408DSP-7SI#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your R1LP0408DSP-7SI#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 R1LP0408DSP-7SI#S0?

For technical support, including R1LP0408DSP-7SI#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSP-7SI#S0 requirements.

6.How does Aetrix verify that R1LP0408DSP-7SI#S0 is sourced from the original manufacturer or authorized distributors?

All R1LP0408DSP-7SI#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 R1LP0408DSP-7SI#S0 meets industry standards.

7.What is the process for return or replacement of R1LP0408DSP-7SI#S0?

All R1LP0408DSP-7SI#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSP-7SI#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 R1LP0408DSP-7SI#S0 part is unused and in its original packaging.

Return procedure for R1LP0408DSP-7SI#S0:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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