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Renesas R1LP0408CSB-7UI#D0
- Part No.:
- R1LP0408CSB-7UI#D0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- -
- Datasheet:
-
R1LP0408CSB-7UI#D0.pdf
- Description:
- STANDARD SRAM, 512KX8, 70NS
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
R1LP0408CSB-7UI#D0 from Renesas is a 4-Mbit CMOS static RAM organized as 512-kword × 8-bit, operating from a single 5 V ±10% supply, with 70 ns max access time and 4 µW typical standby current. It supports battery backup systems via low-power retention down to 2 V and features TTL-compatible inputs/outputs, three-state data I/O, and full static operation without clocks or refresh.
For engineers reviewing the R1LP0408CSB-7UI#D0 datasheet, R1LP0408CSB-7UI#D0 pinout, R1LP0408CSB-7UI#D0 application, or R1LP0408CSB-7UI#D0 equivalent, key selection criteria include 32-pin TSOP II package compatibility, 70 ns read/write timing compliance, low-voltage data retention capability, and direct replacement suitability in legacy SRAM-based microcontroller buffers and industrial control memory subsystems.
Technical Context
The R1LP0408CSB-7UI#D0 implements a fully static 6-transistor cell architecture with independent row/column decoders and a timing pulse generator that eliminates external clocking. Its control logic accepts asynchronous CS#, OE#, and WE# signals to manage read, write, and high-impedance states without cycle overlap constraints.
All 19 address lines (A0–A18) drive internal decoding for 512 kwords; bidirectional I/O0–I/O7 share a common bus with output enable and write enable asserting directionality. The device maintains data integrity during VCC drop to 2 V when CS# remains asserted, enabling seamless battery switchover in real-time systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 4 Mbit (512-kword × 8-bit) - supports 64 KB byte-addressable storage without banking logic |
| Access time | 70 ns max - defines minimum read cycle duration for synchronous CPU interface timing |
| Supply voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no external regulator required |
| Standby current | 4 µW typ at +70°C - enables multi-year battery operation in always-on backup mode |
| Data retention VCC | 2 V min - sustains stored contents during main power loss without external hold-up circuitry |
| Operating temperature | −20°C to +70°C - qualified for industrial ambient environments without derating |
| Output drive | VOH ≥ 2.4 V @ −1.0 mA, VOL ≤ 0.4 V @ 2.1 mA - ensures noise margin against TTL loads |
Pinout & Package
Package: 400-mil 32-pin plastic TSOP II (32P3Y-H), surface-mount, JEDEC-standard footprint with 0.5 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address input | 19-bit address bus accepting full 512-kword range; no multiplexing or latching required |
| I/O0–I/O7 | Bi-directional data bus | Three-state CMOS outputs with TTL-compatible levels; shared pins reduce PCB trace count |
| CS# | Chip select | Active-low enable controlling all internal buffers; must be high for data retention mode entry |
| OE# | Output enable | Active-low gate for read data output; high-Z when deasserted, independent of CS# state |
| WE# | Write enable | Active-low signal initiating write cycles; combined with CS# to define valid write window |
| VCC | Power supply | +5 V supply pin; decoupling capacitor placement critical for 70 ns timing stability |
| VSS | Ground | Reference return path for all I/O and core logic; requires low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Fully static operation | No clocks, no refresh cycles, no timing strobes - simplifies controller interface and reduces system-level timing overhead |
| Low-power standby | 4 µW typical consumption enables >10-year coin-cell backup life in memory-retention applications |
| TTL-compatible I/O | Direct interfacing with 5 V microcontrollers and FPGAs without level-shifting circuitry |
| Battery backup support | Valid data retention at VCC = 2 V with CS# held high - eliminates need for external power-fail detection |
| Equal access/cycle times | 70 ns tRC = tAA = tCO - allows predictable worst-case timing budgeting in deterministic real-time systems |
Applications
| Industrial PLC Data Buffer | Medical Device Parameter Storage |
|---|---|
Use Scenario: Storing runtime configuration and sensor calibration tables in programmable logic controllers with intermittent power loss. IC Role / Device Role / Timing Role: Non-refreshing volatile memory buffer holding critical operational parameters during brownout events. Use Value: 2 V data retention and 4 µW standby current enable uninterrupted parameter persistence across 10+ second AC outages without supercapacitor support. |
Use Scenario: Holding patient-specific therapy settings and firmware update staging data in portable diagnostic equipment. IC Role / Device Role / Timing Role: Byte-accessible SRAM used for fast read/write scratchpad during active monitoring and configuration sessions. Use Value: 70 ns access time meets real-time display update latency requirements while 32-pin TSOP II footprint supports compact, high-density PCB layouts. |
| Automotive Body Control Module | Legacy Communication Gateway Cache |
Use Scenario: Caching door lock status, lighting profiles, and seat position memory in 12 V automotive body electronics. IC Role / Device Role / Timing Role: Low-voltage tolerant SRAM providing fail-safe storage during ignition cycling and battery disconnect events. Use Value: Guaranteed data retention at 2 V VCC allows direct connection to vehicle battery rail without dedicated LDO, reducing BOM cost and board space. |
Use Scenario: Acting as packet buffer and protocol translation workspace in RS-485-to-CAN gateways using aging 8-bit microcontrollers. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for obsolete 512K×8 SRAMs in field-deployed infrastructure. Use Value: Identical 32-pin TSOP II footprint and 70 ns timing allow retrofit without PCB rework, extending lifecycle of installed base hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV5128AL-70TLI | Same density, 32-pin TSOP II, 70 ns access, but 3.3 V only; no 2 V retention | Requires level-shifting in 5 V systems; unsuitable for battery-backup retention below 3 V | Select only if migrating to 3.3 V system architecture and external retention not needed |
| AS6C4008-70PCN | 5 V operation, 70 ns, 32-pin SOP (not TSOP II); higher standby current (10 µA vs 4 µW) | Larger footprint and thermal profile; incompatible with TSOP II board layouts | Choose only when SOP mounting is preferred and standby power is not constrained |
Compared with IS61LV5128AL-70TLI and AS6C4008-70PCN, the R1LP0408CSB-7UI#D0 uniquely combines 5 V operation, 32-pin TSOP II compatibility, and sub-2 V data retention-making it the sole option for retrofitting legacy 5 V industrial systems requiring battery-backed memory persistence without layout changes.
Availability
R1LP0408CSB-7UI#D0 is available at Aetrix Electronics and suitable for industrial PLC data buffering, medical device parameter storage, and automotive body control module designs requiring stable component supply and long-term obsolescence management.
Supply support for R1LP0408CSB-7UI#D0 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 Technology Corp. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and memory solutions for industrial, automotive, and consumer applications.
The R1LP0408C-C Series was designed as a drop-in replacement for legacy 5 V SRAMs in industrial control and instrumentation systems, emphasizing low-power retention, TTL compatibility, and long-lifecycle availability.
FAQ
What is the maximum operating temperature range for the R1LP0408CSB-7UI#D0?
The R1LP0408CSB-7UI#D0 is rated for operation from −20°C to +70°C. This industrial-grade temperature range is validated per the DC and AC characteristics tables in the Rev. 2.00 datasheet, with all timing and current specifications guaranteed across this span without derating. The R1LP0408CSB-7UI#D0 maintains 70 ns access time and 4 µW standby current at +70°C.
Does the R1LP0408CSB-7UI#D0 support true static operation without clocks or refresh cycles?
Yes, the R1LP0408CSB-7UI#D0 is a fully static RAM using a 6-transistor memory cell design. It requires no clocks, no timing strobes, and no periodic refresh - all operations are purely asynchronous and controlled solely by CS#, OE#, and WE# transitions. This behavior is explicitly confirmed in the "Features" section of the R1LP0408CSB-7UI#D0 datasheet.
What package type does the R1LP0408CSB-7UI#D0 use, and is it pin-compatible with other variants in the series?
The R1LP0408CSB-7UI#D0 uses a 400-mil 32-pin plastic TSOP II package (32P3Y-H). It shares identical pinout and mechanical dimensions with R1LP0408CSB-5SC and R1LP0408CSB-7LC, differing only in access time specification. All CSB-suffixed variants are pin-to-pin compatible and require no PCB layout changes when substituted.
Can the R1LP0408CSB-7UI#D0 retain data during main power loss, and at what voltage threshold?
Yes, the R1LP0408CSB-7UI#D0 retains stored data down to VCC = 2 V when CS# is held high, as specified in the "Low VCC Data Retention Characteristics" table. At 2 V, typical data retention current is 0.8 µA (−7LC variant, +25°C), enabling multi-year battery backup. The R1LP0408CSB-7UI#D0 enters retention mode automatically upon VCC drop if CS# remains asserted.
Is the R1LP0408CSB-7UI#D0 compatible with standard TTL logic levels?
Yes, the R1LP0408CSB-7UI#D0 is directly TTL-compatible: VIH = 2.2 V min, VIL = 0.8 V max, VOH ≥ 2.4 V at −1.0 mA, and VOL ≤ 0.4 V at 2.1 mA. All inputs and outputs meet standard TTL voltage thresholds, allowing direct connection to 5 V microcontrollers, CPLDs, and legacy logic without level shifters - a key feature confirmed in the "Features" and "DC Operating Conditions" sections of the R1LP0408CSB-7UI#D0 datasheet.
R1LP0408CSB-7UI#D0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- -
- Memory Format:
- -
- Technology:
- -
- Memory Size:
- -
- Memory Organization:
- -
- Memory Interface:
- -
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
R1LP0408CSB-7UI#D0 FAQ
1.How can I place an order for R1LP0408CSB-7UI#D0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP0408CSB-7UI#D0 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 R1LP0408CSB-7UI#D0 reliable?
The price and inventory of R1LP0408CSB-7UI#D0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP0408CSB-7UI#D0 is usually 5 days.
3.What payment methods are accepted for R1LP0408CSB-7UI#D0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP0408CSB-7UI#D0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP0408CSB-7UI#D0?
R1LP0408CSB-7UI#D0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP0408CSB-7UI#D0 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 R1LP0408CSB-7UI#D0?
For technical support, including R1LP0408CSB-7UI#D0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP0408CSB-7UI#D0 requirements.
6.How does Aetrix verify that R1LP0408CSB-7UI#D0 is sourced from the original manufacturer or authorized distributors?
All R1LP0408CSB-7UI#D0 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 R1LP0408CSB-7UI#D0 meets industry standards.
7.What is the process for return or replacement of R1LP0408CSB-7UI#D0?
All R1LP0408CSB-7UI#D0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP0408CSB-7UI#D0, 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 R1LP0408CSB-7UI#D0 part is unused and in its original packaging.
Return procedure for R1LP0408CSB-7UI#D0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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