My Inquiry
My Account
Renesas R1LP0408DSB-5SI#S1
- Part No.:
- R1LP0408DSB-5SI#S1
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 32-SOIC (0.400", 10.16mm Width)
- Datasheet:
-
R1LP0408DSB-5SI#S1.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 32TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:2,418
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R1LP0408DSB-5SI#S1 from Renesas Electronics is a 4-Mbit advanced low-power static RAM (LPSRAM), organized as 512-kword × 8-bit, operating on a single 5V supply (4.5–5.5V) with 55ns max access time and 4µW typical standby power dissipation. It serves as non-volatile data buffer in battery-backed systems such as industrial PLCs, medical data loggers, and smart metering modules requiring reliable retention during brownout.
For engineers reviewing the R1LP0408DSB-5SI#S1 datasheet, R1LP0408DSB-5SI#S1 pinout, R1LP0408DSB-5SI#S1 application, or R1LP0408DSB-5SI#S1 equivalent, key selection criteria include TSOP-II package compatibility, TTL-level I/O interface, low-standby-current operation under Vcc ≥ 2.0V for data retention, and strict timing alignment of tAA/tWC ≤ 55ns in read/write cycles.
Technical Context
The R1LP0408DSB-5SI#S1 implements a 2,048 × 2,048 memory matrix with row/column decoding driven by A0–A18 address inputs and controlled via CS#, WE#, and OE# active-low signals. Its architecture supports common I/O bus operation with three-state output control and direct TTL compatibility across all pins.
It features dual-mode write operation-OE# clocked or OE# fixed low-with tWP ≥ 40ns minimum pulse width and tDW ≥ 25ns data-to-write overlap to prevent bus contention. Data retention is guaranteed down to Vcc = 2.0V with ISB1 ≤ 10µA at +85°C when CS# is held high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Mbit (512 kwords × 8 bits) - supports 64KB byte-addressable storage space |
| Access time | 55 ns max - enables synchronous interfacing with 18 MHz microcontrollers without wait states |
| Supply voltage | 4.5–5.5 V - compatible with standard 5V logic rails and tolerant of ±10% regulation variation |
| Standby current | 0.8–10 µA (temp-dependent) - enables multi-year battery backup in coin-cell powered devices |
| Data retention Vcc | 2.0–5.5 V - maintains stored data during brownout or backup mode without external supervision |
| I/O interface | Three-state, TTL-compatible - directly interfaces with legacy 5V MCUs without level-shifting circuitry |
| Package | 32-pin TSOP (II), 400-mil - surface-mount footprint optimized for compact industrial PCB layouts |
Pinout & Package
Package: 32-pin TSOP (II), 400-mil body width, JEDEC standard footprint with gull-wing leads.
| 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 GND plane with low-inductance path |
| A0–A18 | Address input | 19-bit address bus supporting full 512k-word addressing; A18 is MSB for top-half bank selection |
| I/O0–I/O7 | Data input/output | Bi-directional 8-bit data bus with three-state control; shares pins for read/write to reduce pin count |
| CS# | Chip select | Active-low enable; high state forces device into ultra-low-ISB1 retention mode when Vcc ≥ 2.0V |
| WE# | Write enable | Active-low write strobe; combined with CS# low to initiate write cycle per tWP timing window |
| OE# | Output enable | Active-low output gate; controls I/O bus direction and high-Z state during read disable or write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Low-power standby | ISB1 = 0.8 µA @ +25°C - extends battery life in always-on monitoring nodes beyond 10 years |
| Direct TTL compatibility | VIH = 2.2 V min, VOL = 0.4 V max - eliminates need for level translators when interfacing with 5V MCUs |
| Battery backup support | VDR = 2.0 V min - retains data during main power failure without external SRAM controller or backup switch |
| Equal access/cycle times | tRC = tAA = 55 ns - simplifies timing budgeting in deterministic real-time systems |
| Common I/O bus | Single 8-bit bidirectional bus - reduces PCB trace count and routing complexity versus separate DQ/DI paths |
Applications
| Industrial Data Logger | Smart Electricity Meter |
|---|---|
Use Scenario: Continuous timestamped sensor sampling (temperature, voltage, current) during mains outage, with periodic flash backup. IC Role / Device Role / Timing Role: Primary volatile buffer holding up to 64KB of unsaved telemetry before non-volatile commit. Use Value: 2.0V data retention ensures no loss during 100ms–5s brownouts; 4µW standby draws <1µAh/day from CR2032. | Use Scenario: Storing billing intervals, tamper logs, and waveform snapshots between utility communication cycles. IC Role / Device Role / Timing Role: High-reliability scratchpad memory synchronized to metrology ASIC's 16-bit parallel interface. Use Value: 55ns access aligns with 18MHz metrology clock; TSOP-II package fits constrained meter PCB area. |
| Medical Patient Monitor | Programmable Logic Controller (PLC) |
Use Scenario: Real-time ECG/SpO₂ waveform buffering during battery-switchover or AC dropout events. IC Role / Device Role / Timing Role: Low-latency frame buffer enabling uninterrupted display and alarm triggering. Use Value: tOH = 10ns hold time prevents data corruption during rapid address changes; ISB1 ≤ 2.5µA @ +40°C minimizes thermal drift. | Use Scenario: Holding I/O mapping tables, ladder logic state variables, and diagnostic history in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Deterministic-access memory for cyclic scan execution with sub-100µs cycle jitter. Use Value: Equal tRC/tAA eliminates worst-case timing margin stacking; 32-pin TSOP allows automated placement on industrial PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62148EV30LL-55ZAXI | 4 Mbit (512k×8), 55ns, 3.3V-only supply (2.2–3.6V); 32-pin TSOP-I; ISB = 1µA typ @ +25°C | Requires 3.3V rail and level-shifting for 5V systems; lacks 2.0V data retention capability | Select only if system uses 3.3V core logic and does not require brownout data hold below 3.0V |
| AS6C4008-55ZIN | 4 Mbit (512k×8), 55ns, 5V supply (4.5–5.5V); 32-pin SOP; ISB = 2µA typ @ +25°C; no specified VDR | Same voltage range but SOP package increases board area; no documented data retention below 4.5V | Prefer when through-hole assembly or legacy SOP footprint is mandated; avoid where battery backup below 4.5V is required |
Compared with CY62148EV30LL-55ZAXI and AS6C4008-55ZIN, the R1LP0408DSB-5SI#S1 uniquely delivers 2.0V data retention and 4µW standby in a 400-mil TSOP-II package-critical for space-constrained, battery-backed 5V systems where voltage droop tolerance and ultra-low leakage are design-critical.
Availability
R1LP0408DSB-5SI#S1 is available at Aetrix Electronics and suitable for industrial data loggers, smart electricity meters, and medical patient monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R1LP0408DSB-5SI#S1 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 designed specifically for battery-backed, low-power static RAM applications demanding reliable data retention at reduced Vcc and minimal standby current in industrial and medical edge devices.
FAQ
What is the minimum supply voltage for data retention in R1LP0408DSB-5SI#S1?
The R1LP0408DSB-5SI#S1 guarantees data retention down to Vcc = 2.0V when CS# is held high (≥ Vcc − 0.2V). This enables operation during brownout conditions without external supervision. Retention current (ICCDR) remains ≤ 10µA at +85°C, making R1LP0408DSB-5SI#S1 suitable for long-duration battery backup in safety-critical systems.
Does R1LP0408DSB-5SI#S1 support true 5V TTL interface levels?
Yes, R1LP0408DSB-5SI#S1 is fully TTL-compatible: VIH = 2.2V min, VIL = 0.8V max, VOH = 2.4V min at IOH = −1mA, and VOL = 0.4V max at IOL = 2.1mA. All inputs and outputs meet standard 5V TTL thresholds, allowing direct connection to legacy 5V microcontrollers and FPGAs without level shifters-confirmed in DC Operating Conditions on page 5 of R10DS0274EJ0200 Rev.2.00.
What is the package type and lead count of R1LP0408DSB-5SI#S1?
R1LP0408DSB-5SI#S1 uses a 32-pin TSOP (II) package with 400-mil body width, compliant with JEDEC MO-141BA. Pin pitch is 0.5mm, and lead finish is matte tin. This surface-mount package supports automated assembly and provides better thermal performance than SOP variants-explicitly listed in the Ordering Information table on page 1 of R10DS0274EJ0200 Rev.2.00.
How does R1LP0408DSB-5SI#S1 handle write operations with OE# low fixed?
When OE# is held low, R1LP0408DSB-5SI#S1 enters Write Cycle (2) mode per page 10 of R10DS0274EJ0200 Rev.2.00. In this mode, tWP must satisfy tWP ≥ tDW(min) + tWHZ(max) to prevent data bus contention. The device asserts high-Z on I/O lines after tWHZ (≤20ns), ensuring clean write transitions without bus conflicts-critical for deterministic timing in PLC and metrology applications.
Is R1LP0408DSB-5SI#S1 pin-compatible with other members of the R1LP0408D Series?
Yes, all R1LP0408D Series variants-including R1LP0408DSP-5SI#S*, R1LP0408DSB-5SI#B*, and R1LP0408DSB-5SI#S1-share identical pinouts, electrical characteristics, and timing parameters. Differences are limited to package type (SOP vs. TSOP), shipping format (tape vs. tray), and assembly revision code. Pin mapping and function definitions are consistent across the family per the Pin Description table on page 2.
R1LP0408DSB-5SI#S1 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:
- 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#S1 FAQ
1.How can I place an order for R1LP0408DSB-5SI#S1 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408DSB-5SI#S1 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#S1 reliable?
The price and inventory of R1LP0408DSB-5SI#S1 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#S1 is usually 5 days.
3.What payment methods are accepted for R1LP0408DSB-5SI#S1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408DSB-5SI#S1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408DSB-5SI#S1?
R1LP0408DSB-5SI#S1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408DSB-5SI#S1 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#S1?
For technical support, including R1LP0408DSB-5SI#S1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408DSB-5SI#S1 requirements.
6.How does Aetrix verify that R1LP0408DSB-5SI#S1 is sourced from the original manufacturer or authorized distributors?
All R1LP0408DSB-5SI#S1 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#S1 meets industry standards.
7.What is the process for return or replacement of R1LP0408DSB-5SI#S1?
All R1LP0408DSB-5SI#S1 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408DSB-5SI#S1, 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#S1 part is unused and in its original packaging.
Return procedure for R1LP0408DSB-5SI#S1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP0408DSB-5SI#S1 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
