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

Renesas R1LP0408DSP-5SI#S0

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

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Part No.:: R1LP0408DSP-5SI#S0

Manufacturer:: Renesas

Category:: Memory

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

Datasheet:: R1LP0408DSP-5SI#S0.pdf

Description:: IC SRAM 4MBIT PARALLEL 32SOP

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Product details

Overview

R1LP0408DSP-5SI#S0 from Renesas Electronics is a 4-Mbit advanced low-power static RAM (512-kword × 8-bit), fabricated in high-performance CMOS and TFT technologies, operating from 4.5V to 5.5V with 55ns max access time and 4µW typical standby power dissipation - designed for battery-backed memory systems requiring reliable data retention at low V_CC.

For engineers reviewing the R1LP0408DSP-5SI#S0 datasheet, R1LP0408DSP-5SI#S0 pinout, R1LP0408DSP-5SI#S0 application, or R1LP0408DSP-5SI#S0 equivalent, this page delivers verified specifications, SOP-32 package details, TTL-compatible I/O behavior, low-voltage data retention characteristics, and real-world use context for embedded backup SRAM selection.

Technical Context

The R1LP0408DSP-5SI#S0 implements a 2,048 × 2,048 memory matrix with full address decoding (A0–A18) and bidirectional I/O0–I/O7 pins controlled by CS#, WE#, and OE# signals. Its timing architecture supports equal read/write cycle times (t_RC/t_WC = 55ns) and guarantees output disable within 20ns (t_OHZ, t_CHZ) during chip deselect.

It features true three-state outputs, direct TTL compatibility on all inputs/outputs, and low-voltage data retention down to 2.0V with sub-µA standby current (ISB1 = 0.8µA typ. at +25°C), enabled by CS#-controlled buffer isolation and internal retention mode activation.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory density	4 Mbit (512-kword × 8-bit) - supports 64KB byte-addressable storage without external banking logic.
Access time	55 ns max - enables interface with legacy 18 MHz bus systems and microcontrollers lacking wait-state insertion.
Supply voltage	4.5 V to 5.5 V - compatible with standard 5V TTL/CMOS logic rails and industrial power supplies.
Standby current	0.8 µA typ. at +25°C - extends battery life in years-long backup applications (e.g., RTC + configuration memory).
Data retention V_CC	2.0 V min - retains data during brown-out or battery depletion without external supervisor circuitry.
I/O interface	Common data bus (I/O0–I/O7) with three-state control - reduces PCB trace count and simplifies bus arbitration design.
Operating temperature	-40°C to +85°C - qualified for industrial and automotive under-hood auxiliary modules.

Pinout & Package

This device is housed in a 32-pin plastic SOP (525-mil width), pin-compatible with JEDEC MS-012AC, and suitable for through-hole or surface-mount assembly with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
Vcc	Power supply	Primary 5V supply input; decoupling capacitor required within 10 mm for stable operation.
Vss	Ground	Signal and power ground reference; must be connected to system ground plane with low-inductance path.
A0–A18	Address input	19-bit address bus supporting full 512-kword addressing; A18 controls upper half of memory space.
I/O0–I/O7	Data input/output	Bidirectional 8-bit data bus; high-impedance when CS# or OE# is high, enabling shared bus topology.
CS#	Chip select	Active-low enable; places device in standby (ISB1) when high, isolates address/data buffers during retention.
WE#	Write enable	Active-low write control; initiates write cycle only when CS# is also low; defines t_WP timing window.
OE#	Output enable	Active-low output gate; controls Dout validity independent of CS#; allows read while chip remains selected.

Key Features

Feature	Design Value
Low-power standby mode	0.8 µA typical ISB1 current at +25°C enables multi-year battery backup without periodic refresh.
Direct TTL compatibility	All inputs accept 0.8V/2.2V thresholds and outputs drive -1mA/2.1mA loads - eliminates level-shifter requirements.
Equal access/cycle timing	t_RC = t_WC = 55ns - simplifies timing budgeting in synchronous bus designs with fixed clock cycles.
Low-voltage data retention	Operates down to 2.0V V_CC with guaranteed retention - supports single-cell Li-SOCl₂ or coin-cell backup without boost converters.
Three-state output control	Independent OE# and CS# control enables flexible bus sharing and glitch-free read/write transitions.

Applications

Industrial PLC Configuration Memory	Medical Device Real-Time Clock Backup
Use Scenario: Storing firmware configuration parameters and calibration data in programmable logic controllers subject to frequent power cycling and ambient temperature extremes. IC Role / Device Role / Timing Role: Nonvolatile SRAM providing immediate-access, byte-level read/write capability during runtime and seamless retention during AC loss. Use Value: Eliminates need for EEPROM wear leveling or flash programming delays; 55ns access ensures deterministic scan-cycle timing in safety-critical ladder logic execution.	Use Scenario: Maintaining accurate time-of-day and alarm settings in portable diagnostic equipment powered by replaceable lithium batteries. IC Role / Device Role / Timing Role: Battery-backed memory holding RTC registers and patient session logs during main power removal. Use Value: 0.8µA ISB1 current extends 200mAh coin-cell life beyond 10 years; 2.0V retention threshold prevents data loss during gradual battery discharge.
Automotive Body Control Module EEPROM Emulation	Point-of-Sale Terminal Transaction Log Buffer
Use Scenario: Replacing serial EEPROM in body control units where fast logging of door lock events, mirror position, and lighting presets is required. IC Role / Device Role / Timing Role: High-speed parallel SRAM acting as a write-through cache with periodic dump to nonvolatile storage. Use Value: 55ns write cycle enables logging of >18,000 events per second; TTL compatibility avoids additional logic between MCU GPIO and memory bus.	Use Scenario: Buffering sales transaction records in retail terminals during intermittent network outages or printer jams. IC Role / Device Role / Timing Role: Temporary high-reliability storage holding uncommitted receipts until secure transmission or local print completion. Use Value: Common I/O bus and three-state control allow seamless integration with existing 8-bit microcontroller data buses; SOP-32 footprint fits constrained POS PCB layouts.

Industrial PLC Configuration Memory

Medical Device Real-Time Clock Backup

Use Scenario: Storing firmware configuration parameters and calibration data in programmable logic controllers subject to frequent power cycling and ambient temperature extremes.

IC Role / Device Role / Timing Role: Nonvolatile SRAM providing immediate-access, byte-level read/write capability during runtime and seamless retention during AC loss.

Use Value: Eliminates need for EEPROM wear leveling or flash programming delays; 55ns access ensures deterministic scan-cycle timing in safety-critical ladder logic execution.

Use Scenario: Maintaining accurate time-of-day and alarm settings in portable diagnostic equipment powered by replaceable lithium batteries.

IC Role / Device Role / Timing Role: Battery-backed memory holding RTC registers and patient session logs during main power removal.

Use Value: 0.8µA ISB1 current extends 200mAh coin-cell life beyond 10 years; 2.0V retention threshold prevents data loss during gradual battery discharge.

Automotive Body Control Module EEPROM Emulation

Point-of-Sale Terminal Transaction Log Buffer

Use Scenario: Replacing serial EEPROM in body control units where fast logging of door lock events, mirror position, and lighting presets is required.

IC Role / Device Role / Timing Role: High-speed parallel SRAM acting as a write-through cache with periodic dump to nonvolatile storage.

Use Value: 55ns write cycle enables logging of >18,000 events per second; TTL compatibility avoids additional logic between MCU GPIO and memory bus.

Use Scenario: Buffering sales transaction records in retail terminals during intermittent network outages or printer jams.

IC Role / Device Role / Timing Role: Temporary high-reliability storage holding uncommitted receipts until secure transmission or local print completion.

Use Value: Common I/O bus and three-state control allow seamless integration with existing 8-bit microcontroller data buses; SOP-32 footprint fits constrained POS PCB layouts.

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
IS61LV25616AL-10TLI	256K × 16-bit organization, 10ns access, 3.3V supply only - no 5V tolerance or 2.0V retention.	Requires level translation in 5V systems; unsuitable for battery-retention below 3.0V.	Select only for new 3.3V designs needing faster access and wider data bus.
AS6C4008-55PCN	4M × 8-bit, 55ns access, 5V supply, but 10µA typical ISB - 12× higher standby current than R1LP0408DSP-5SI#S0.	Limited battery lifetime in long-term backup; lacks low-V_CC retention spec.	Acceptable for mains-powered systems where ultra-low standby is not critical.

Compared with IS61LV25616AL-10TLI and AS6C4008-55PCN, the R1LP0408DSP-5SI#S0 uniquely combines 5V operation, 55ns timing, and sub-µA standby with validated 2.0V data retention - making it the only choice for industrial battery-backed SRAM where voltage headroom and longevity are design constraints.

Availability

R1LP0408DSP-5SI#S0 is available at Aetrix Electronics and suitable for industrial PLC configuration memory, medical device RTC backup, and automotive body control module EEPROM emulation requiring stable component supply across extended product lifecycles.

Supply support for R1LP0408DSP-5SI#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 specifically for low-power, battery-backed parallel SRAM applications demanding high reliability, extended data retention, and industrial temperature operation - targeting legacy 5V system upgrades and space-constrained embedded designs.

FAQ

What is the minimum V_CC required to retain data in R1LP0408DSP-5SI#S0?

The R1LP0408DSP-5SI#S0 guarantees data retention down to 2.0V V_CC, as specified in the Low V_CC Data Retention Characteristics table. At this voltage, with CS# held high (≥ V_CC − 0.2V), the device draws only 0.8µA typical current at +25°C and maintains stored data indefinitely - enabling direct coin-cell backup without voltage regulation.

Does R1LP0408DSP-5SI#S0 support true 5V TTL interfacing without level shifters?

Yes, the R1LP0408DSP-5SI#S0 is fully TTL-compatible: input thresholds meet VIH ≥ 2.2V and VIL ≤ 0.8V, while outputs drive VOH ≥ 2.4V at -1mA and VOL ≤ 0.4V at 2.1mA. This eliminates external level-shifting components when interfacing with legacy 5V microcontrollers, CPLDs, or bus transceivers.

What package type is used for R1LP0408DSP-5SI#S0, and is it RoHS-compliant?

R1LP0408DSP-5SI#S0 uses a 32-pin plastic SOP (525-mil width) per JEDEC MS-012AC, and is RoHS-compliant as confirmed in Renesas's official documentation (R10DS0274EJ0200 Rev.2.00). The "#S0" suffix denotes embossed tape packaging, and the device meets lead-free soldering requirements for Pb-free reflow profiles.

How does the R1LP0408DSP-5SI#S0 handle bus contention during write cycles?

The R1LP0408DSP-5SI#S0 prevents bus contention via strict timing control: during write, OE# must be high (or CS# low with OE# high) to place I/O pins in high-impedance state. The datasheet mandates t_WP ≥ t_DW(min) + t_WHZ(max) when OE# is fixed low - ensuring data bus release before new write data is driven.

Is R1LP0408DSP-5SI#S0 pin-compatible with other devices in the R1LP0408D Series?

Yes, all R1LP0408D Series variants - including R1LP0408DSP-5SI#B0, R1LP0408DSB-5SI#S0, and R1LP0408DSP-5SI#S0 - share identical 32-pin SOP/TSOP pinouts and signal assignments. The "P" suffix denotes SOP package, "B" denotes TSOP, and "#S0" indicates embossed tape packaging - functional and pinout compatibility is maintained across variants.

R1LP0408DSP-5SI#S0 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

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

Packaging:: Tape & Reel (TR)

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:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-SOP

R1LP0408DSP-5SI#S0 FAQ

1.How can I place an order for R1LP0408DSP-5SI#S0 through Aetrix?

Please submit a Request for Quotation (RFQ) for R1LP0408DSP-5SI#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-5SI#S0 reliable?

The price and inventory of R1LP0408DSP-5SI#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-5SI#S0 is usually 5 days.

3.What payment methods are accepted for R1LP0408DSP-5SI#S0?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSP-5SI#S0 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for R1LP0408DSP-5SI#S0?

R1LP0408DSP-5SI#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your R1LP0408DSP-5SI#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-5SI#S0?

For technical support, including R1LP0408DSP-5SI#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSP-5SI#S0 requirements.

6.How does Aetrix verify that R1LP0408DSP-5SI#S0 is sourced from the original manufacturer or authorized distributors?

All R1LP0408DSP-5SI#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-5SI#S0 meets industry standards.

7.What is the process for return or replacement of R1LP0408DSP-5SI#S0?

All R1LP0408DSP-5SI#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSP-5SI#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-5SI#S0 part is unused and in its original packaging.

Return procedure for R1LP0408DSP-5SI#S0:

1.Submit a request within 90 days.

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

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