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Renesas R1LP5256ESP-7SR#S0
- Part No.:
- R1LP5256ESP-7SR#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.330", 8.40mm Width)
- Datasheet:
-
R1LP5256ESP-7SR#S0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,473
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Product details
Overview
R1LP5256ESP-7SR#S0 from Renesas Electronics is a 256Kb low-power static RAM organized as 32,768 × 8-bit, fabricated in 0.15µm CMOS/TFT process, operating from a single 4.5V–5.5V supply with 70ns access time and 1µA typical standby current at 5.0V, used for battery-backed memory in embedded controllers and instrumentation.
For engineers reviewing the R1LP5256ESP-7SR#S0 datasheet, R1LP5256ESP-7SR#S0 pinout, R1LP5256ESP-7SR#S0 application, or R1LP5256ESP-7SR#S0 equivalent, key selection criteria include TTL-compatible I/O timing, no-refresh operation, OR-tie capable three-state outputs, chip-select expandability, and 28-pin SOP packaging for legacy board compatibility.
Technical Context
The R1LP5256ESP-7SR#S0 implements a fully static memory architecture with no internal clocks or refresh circuitry, relying on address decoding and control signal sequencing (CS#, WE#, OE#) to manage read/write cycles and output enable/disable states. Its block diagram confirms direct connection between address buffer, row/column decoders, and sense/write amplifiers without intermediate latches or clock domains.
It supports two distinct timing modes: CS#-controlled write and WE#-controlled write, with defined setup/hold relationships for address, data, and control signals. AC characteristics specify tAA = 70ns, tOE = 35ns, and tWC = 70ns under Vcc = 4.5–5.5V and Ta = 0°C to +70°C conditions - matching the R-version temperature grade of this part.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32,768 words × 8 bits) - provides byte-addressable storage for firmware buffers or real-time data logging in microcontroller systems. |
| Access time | 70 ns - determines maximum sustained read/write throughput of ~14.3 MB/s in burst mode with proper bus timing. |
| Supply voltage | 4.5 V to 5.5 V - compatible with standard 5V logic rails and tolerant of ±10% regulation variation. |
| Standby current | 1 µA typical at 5.0V/25°C - enables multi-year battery backup in non-volatile memory retention applications. |
| Operating temperature | 0°C to +70°C (R-version) - qualified for commercial-grade industrial control and test equipment environments. |
| I/O interface | TTL-compatible inputs and outputs - eliminates level-shifting requirements when interfacing with legacy 5V microcontrollers or FPGAs. |
| Package | 450-mil 28-pin plastic SOP (PRSP0028DB-B) - surface-mount footprint compatible with standard reflow profiles and manual repair workflows. |
Pinout & Package
Package: 450-mil 28-pin plastic SOP (PRSP0028DB-B), 28P2W-C outline, embossed tape packaging (1000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 4.5–5.5V supply rail; 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–A14 | Address input | 15-bit address bus accepting 0x0000–0x7FFF range; all inputs TTL-compatible with VIH ≥ 2.2V, VIL ≤ 0.8V. |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus with three-state outputs; supports OR-tie configuration via high-Z control. |
| CS# | Chip select | Active-low enable controlling entire memory array; asserts standby mode when high (ISB ≤ 3 µA). |
| WE# | Write enable | Active-low write strobe; initiates write cycle when CS# is low and WE# transitions low before address/data stabilization. |
| OE# | Output enable | Active-low control enabling DQ outputs during read; prevents bus contention when high or during write cycles. |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Fully static architecture eliminates external refresh circuitry and timing overhead, simplifying system design and reducing CPU interrupt load. |
| Low standby current | 1 µA typical at 5.0V/25°C enables >10-year data retention on coin-cell batteries in backup memory applications. |
| OR-tie capability | Three-state outputs allow multiple R1LP5256ESP-7SR#S0 devices to share a common data bus without external bus transceivers. |
| Easy memory expansion | CS#-based chip selection supports daisy-chained or decoded addressing for building larger memory maps up to 1MB+ using identical parts. |
| TTL-compatible I/O | Direct interface with legacy 5V microcontrollers (e.g., 8051, PIC18F), CPLDs, and FPGA I/O banks without level translation. |
Applications
| Industrial Data Logger | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Captures sensor readings at 1kHz during portable ECG monitoring sessions with intermittent power. IC Role / Device Role / Timing Role: Non-volatile buffer storing waveform samples during battery operation; retains data during main power loss via low-Vcc retention mode. Use Value: Enables 72+ hours of continuous recording on CR2032 backup power due to 1µA ISB and 2.0V VDR minimum. |
Use Scenario: Stores calibration coefficients and fault logs in handheld ultrasound probe units with field-upgradable firmware. IC Role / Device Role / Timing Role: Read/write scratchpad memory accessed by ARM Cortex-M4 host processor during boot and diagnostics. Use Value: Eliminates need for external EEPROM wear-leveling logic while supporting 100k+ write cycles via SRAM endurance. |
| Automated Test Equipment (ATE) | Legacy Industrial PLC Module |
|
Use Scenario: Holds pattern generation tables and pass/fail result history in benchtop semiconductor testers. IC Role / Device Role / Timing Role: High-speed memory mapped into FPGA address space for deterministic 70ns read/write access during test vector execution. Use Value: Meets tight 100ns cycle budget for parallel test channels without adding wait states or pipeline stalls. |
Use Scenario: Provides user-configurable parameter storage and runtime variable buffering in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Standalone memory peripheral interfaced to 8-bit microcontroller via parallel bus with CS#/OE#/WE# handshaking. Use Value: Supports hot-swap-safe memory expansion via shared DQ bus and discrete chip selects across multiple modules. |
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 | 16-bit bus (256K × 16), 10ns access, 3.3V only, 44-pin TSOP | Higher bandwidth but incompatible voltage and bus width; requires PCB redesign and level shifters. | Select only if migrating to 3.3V systems and needing wider data paths; not drop-in for R1LP5256ESP-7SR#S0. |
| AS6C4008-70ZIN | 8-bit bus, 70ns access, 2.7–5.5V supply, 28-pin SOJ (not SOP) | Same timing and data width but different package (SOJ vs SOP); requires socket or layout change. | Valid alternative if SOJ footprint is acceptable and dual-voltage operation (2.7V min) is needed for extended battery life. |
Compared with IS61LV25616AL-10TLI and AS6C4008-70ZIN, the R1LP5256ESP-7SR#S0 uniquely combines 5V tolerance, 28-pin SOP compatibility, and sub-µA standby in a single-part solution for legacy industrial upgrades - avoiding voltage translation, bus widening, or package conversion.
Availability
R1LP5256ESP-7SR#S0 is available at Aetrix Electronics and suitable for industrial data loggers, medical diagnostic instruments, automated test equipment, legacy PLC modules, and battery-backed instrumentation requiring stable component supply over extended production lifecycles.
Supply support for R1LP5256ESP-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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.
The R1LP5256E Series was designed specifically for low-power, no-refresh memory applications in battery-operated and space-constrained embedded systems - emphasizing reliability, TTL compatibility, and long-term data retention.
FAQ
What is the maximum operating frequency supported by R1LP5256ESP-7SR#S0?
The R1LP5256ESP-7SR#S0 does not operate on a clock signal; it is a static RAM with asynchronous timing. Its 70ns access time corresponds to a maximum effective bus cycle rate of approximately 14.3 MHz in ideal conditions. Actual system throughput depends on address setup/hold times, CS# assertion latency, and controller bus protocol overhead - not a fixed clock frequency.
Does R1LP5256ESP-7SR#S0 support data retention at voltages below 4.5V?
Yes, the R1LP5256ESP-7SR#S0 supports data retention down to 2.0V (VDR min) with CS# held high. At Vcc = 3.0V, its typical data retention current is 1µA at 25°C, rising to 10µA at +85°C. This enables multi-year backup operation using primary lithium or supercapacitor sources without active regulation.
Is R1LP5256ESP-7SR#S0 pin-compatible with other members of the R1LP5256E Series?
Yes, all R1LP5256E Series variants - including R1LP5256ESP-5SR#S0, R1LP5256ESP-7SI#S0, and R1LP5256ESA-7SR#S0 - share identical pinouts and electrical interfaces. Differences are limited to access time (55ns vs 70ns), temperature grade (R vs I), and package type (SOP vs TSOP), allowing direct substitution where timing and environmental requirements align.
Can R1LP5256ESP-7SR#S0 be used in new designs given its 2011 datasheet revision?
Yes, the R1LP5256ESP-7SR#S0 remains actively manufactured and stocked by Renesas and authorized distributors. Its 0.15µm process, proven reliability, and continued availability make it suitable for new industrial and medical designs where 5V parallel SRAM compatibility, long-lifecycle support, and no-refresh operation are required.
What is the meaning of "#S0" in R1LP5256ESP-7SR#S0?
The "#S0" suffix in R1LP5256ESP-7SR#S0 indicates embossed tape packaging (1000 pcs/reel) per Renesas's ordering convention. It distinguishes this reel-packaged version from tube-packaged variants (e.g., "#B0") and confirms compliance with JEDEC standard tape-and-reel dimensions for automated SMT placement.
R1LP5256ESP-7SR#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.330", 8.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K 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:
- 28-SOP
R1LP5256ESP-7SR#S0 FAQ
1.How can I place an order for R1LP5256ESP-7SR#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP5256ESP-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 R1LP5256ESP-7SR#S0 reliable?
The price and inventory of R1LP5256ESP-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 R1LP5256ESP-7SR#S0 is usually 5 days.
3.What payment methods are accepted for R1LP5256ESP-7SR#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP5256ESP-7SR#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP5256ESP-7SR#S0?
R1LP5256ESP-7SR#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP5256ESP-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 R1LP5256ESP-7SR#S0?
For technical support, including R1LP5256ESP-7SR#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP5256ESP-7SR#S0 requirements.
6.How does Aetrix verify that R1LP5256ESP-7SR#S0 is sourced from the original manufacturer or authorized distributors?
All R1LP5256ESP-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 R1LP5256ESP-7SR#S0 meets industry standards.
7.What is the process for return or replacement of R1LP5256ESP-7SR#S0?
All R1LP5256ESP-7SR#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP5256ESP-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 R1LP5256ESP-7SR#S0 part is unused and in its original packaging.
Return procedure for R1LP5256ESP-7SR#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP5256ESP-7SR#S0 Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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