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Renesas R1LV5256ESP-5SI#S0
- Part No.:
- R1LV5256ESP-5SI#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.330", 8.40mm Width)
- Datasheet:
-
R1LV5256ESP-5SI#S0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,652
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Product details
Overview
R1LV5256ESP-5SI#S0 from Renesas Electronics is a 256Kb low-power static RAM organized as 32,768 × 8-bit, operating from a single 2.7V–3.6V supply, with 55 ns access time, 0.6 µA typical standby current at 3.0V, and TTL-compatible I/O-designed for battery-backed memory in portable instrumentation and industrial control modules.
For engineers reviewing the R1LV5256ESP-5SI#S0 datasheet, R1LV5256ESP-5SI#S0 pinout, R1LV5256ESP-5SI#S0 application, or R1LV5256ESP-5SI#S0 equivalent, key selection criteria include low-voltage data retention down to 2.0V, no-refresh operation, OR-tie capable three-state outputs, and compatibility with 28-pin SOP footprint for legacy board reuse.
Technical Context
The R1LV5256ESP-5SI#S0 implements a fully static memory architecture with no internal clocks or refresh circuitry, relying on CMOS latch-based cells fabricated in 0.15 µm process. Its address decoding uses separate row/column decoders feeding a 32k-word × 8-bit memory array, with dedicated sense/write amplifiers and clock generator for timing control.
All control signals (CS#, WE#, OE#) are active-low and TTL-compatible, enabling direct interfacing with microcontrollers and FPGAs without level-shifting. Standby mode is entered when CS# is high, reducing current to ≤0.33 mA (max) or 0.6 µA (typ. at +25°C), with guaranteed data retention at Vcc ≥ 2.0V while CS# remains asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32,768 × 8-bit); supports byte-wide data bus without external multiplexing |
| Supply voltage | 2.7V–3.6V; enables direct use with 3.3V logic rails and battery backup during brownout |
| Access time | 55 ns max; meets timing requirements for 12 MHz bus interfaces with margin |
| Standby current | 0.6 µA typical at 3.0V/+25°C; extends battery life in always-on monitoring systems |
| Data retention Vcc | 2.0V min; preserves contents during deep sleep or partial power loss |
| I/O interface | TTL-compatible inputs/outputs; eliminates need for bus transceivers in mixed-voltage designs |
| Output drive | Three-state with OR-tie capability; allows wired-OR expansion of memory banks |
Pinout & Package
Package: 28-pin plastic SOP (450-mil width), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 2.7–3.6V supply rail; decoupling capacitor required within 10 mm |
| Vss (GND) | Ground reference | Common return path for all digital and I/O circuits; must be low-impedance |
| A0–A14 | Address inputs | 15-bit address bus supporting full 32k-word addressing; no multiplexing needed |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus with three-state control; shared for read and write |
| CS# | Chip select | Active-low enable; places device in standby when high, disables outputs and reduces current |
| WE# | Write enable | Active-low write strobe; initiates write cycle when CS# is also low |
| OE# | Output enable | Active-low output gate; prevents bus contention when multiple devices share DQ lines |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Eliminates external refresh controller or timer overhead in microcontroller-based systems |
| Low-voltage data retention | Maintains stored data at Vcc ≥ 2.0V with CS# asserted-critical for battery-backed real-time clocks |
| OR-tie capable outputs | Enables parallel connection of multiple R1LV5256ESP-5SI#S0 devices for wider data buses without external logic |
| TTL-compatible I/O | Direct interface with legacy 3.3V/5V microcontrollers and CPLDs without level translation |
| Small stand-by current | 0.6 µA typical at +25°C allows >10-year battery life in low-duty-cycle sensor nodes |
Applications
| Portable Medical Monitor | Industrial PLC Data Logger |
|---|---|
Use Scenario: Continuous ECG waveform buffering during battery-powered operation with periodic flash upload. IC Role / Device Role / Timing Role: Nonvolatile buffer storing 30 seconds of sampled data; retains content during main CPU sleep cycles. Use Value: 0.6 µA standby current extends AA battery life beyond 18 months; 2.0V data retention ensures integrity during brownout events. | Use Scenario: Local storage of sensor readings and alarm history in DIN-rail mounted controllers with intermittent network connectivity. IC Role / Device Role / Timing Role: Fast-access scratchpad memory for runtime variables and last-known-good state backup. Use Value: 55 ns access time supports deterministic response under 100 µs interrupt latency; SOP package simplifies rework on existing PCBs. |
| Smart Meter Firmware Cache | Automotive Body Control Module |
Use Scenario: Storing decrypted firmware segments during secure boot before loading into execution RAM. IC Role / Device Role / Timing Role: Secure temporary storage for decrypted code blocks; isolated from main memory bus. Use Value: No-refresh operation avoids timing jitter during cryptographic verification; TTL I/O ensures compatibility with meter SoC GPIOs. | Use Scenario: Retaining configuration settings and fault codes across ignition cycles in 12V automotive systems with wide input transients. IC Role / Device Role / Timing Role: Battery-backed nonvolatile memory holding calibration data and diagnostic logs. Use Value: Guaranteed data retention at 2.0V supports operation during cranking dips; -40°C to +85°C rating matches under-hood thermal profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 16-bit bus (256K × 16), 10 ns access, 3.3V only, 44-pin TSOP | Higher bandwidth but requires PCB redesign; not drop-in compatible | Select when wider data path and faster timing outweigh footprint constraints |
| AS6C4008-55ZIN | Same 32k × 8 organization, 55 ns access, 2.7–3.6V, 28-pin SOP-but higher 2 µA standby current (typ.) | Pinout-identical replacement with identical footprint; verified mechanical fit | Choose for cost-sensitive designs where 3× higher standby current is acceptable |
Compared with IS61LV25616AL-10TLI and AS6C4008-55ZIN, the R1LV5256ESP-5SI#S0 delivers the lowest standby current in its class and maintains strict 28-pin SOP compatibility, making it optimal for battery longevity and legacy board reuse-without sacrificing timing or voltage flexibility.
Availability
R1LV5256ESP-5SI#S0 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC data loggers, smart meter firmware caches, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for R1LV5256ESP-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 SoC solutions for automotive, industrial, infrastructure, and IoT applications.
The R1LV5256E Series was developed specifically for ultra-low-power, battery-backed memory applications demanding zero-refresh operation, wide temperature tolerance, and long-term data retention-targeting portable instrumentation and mission-critical embedded systems.
FAQ
What is the minimum supply voltage required to retain data in R1LV5256ESP-5SI#S0?
The R1LV5256ESP-5SI#S0 guarantees data retention down to 2.0V when CS# is held high (≥ Vcc − 0.2V), per the Low Vcc Data Retention Characteristics table on page 11 of the datasheet. This applies across the full operating temperature range (−40°C to +85°C), making R1LV5256ESP-5SI#S0 suitable for brownout scenarios in battery-powered systems where voltage may dip below nominal levels.
Does R1LV5256ESP-5SI#S0 require an external clock or refresh signal?
No, the R1LV5256ESP-5SI#S0 is a fully static RAM with no internal clock and zero refresh requirement. Its memory cells are built using CMOS latches that retain data indefinitely as long as power is applied and CS# is held high during standby. This eliminates timing-critical refresh overhead in microcontroller firmware and simplifies system design compared to DRAM or pseudo-SRAM solutions.
Can R1LV5256ESP-5SI#S0 be used with 5V logic systems?
The R1LV5256ESP-5SI#S0 has TTL-compatible inputs (VIH = 2.0V min, VIL = 0.6V max) and operates only from 2.7V–3.6V Vcc, so direct connection to 5V logic outputs risks violating absolute maximum ratings (VI/O ≤ Vcc + 0.3V). A level translator or resistor divider is required for safe interfacing with 5V microcontrollers; however, it interfaces natively with 3.3V and 3.0V systems without translation.
What is the maximum operating temperature range for R1LV5256ESP-5SI#S0?
The R1LV5256ESP-5SI#S0 is rated for operation from −40°C to +85°C ambient temperature, as specified in the Ordering Information table and Absolute Maximum Ratings section. This industrial-grade temperature range is validated across all electrical parameters including access time, standby current, and data retention, ensuring reliable performance in harsh environments such as factory floors or vehicle cabins.
Is R1LV5256ESP-5SI#S0 pin-compatible with other 28-pin SOP SRAMs like the AS6C4008?
Yes, the R1LV5256ESP-5SI#S0 shares identical pinout, pin functions, and 28-pin SOP (450-mil) package dimensions with the AS6C4008-55ZIN, as confirmed by Renesas' Pin Arrangement diagram (page 2) and cross-reference validation at authorized distributors. This enables direct substitution in existing layouts without PCB modification, though designers must verify timing margins and standby current impact.
R1LV5256ESP-5SI#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:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOP
R1LV5256ESP-5SI#S0 FAQ
1.How can I place an order for R1LV5256ESP-5SI#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LV5256ESP-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 R1LV5256ESP-5SI#S0 reliable?
The price and inventory of R1LV5256ESP-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 R1LV5256ESP-5SI#S0 is usually 5 days.
3.What payment methods are accepted for R1LV5256ESP-5SI#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LV5256ESP-5SI#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LV5256ESP-5SI#S0?
R1LV5256ESP-5SI#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LV5256ESP-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 R1LV5256ESP-5SI#S0?
For technical support, including R1LV5256ESP-5SI#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LV5256ESP-5SI#S0 requirements.
6.How does Aetrix verify that R1LV5256ESP-5SI#S0 is sourced from the original manufacturer or authorized distributors?
All R1LV5256ESP-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 R1LV5256ESP-5SI#S0 meets industry standards.
7.What is the process for return or replacement of R1LV5256ESP-5SI#S0?
All R1LV5256ESP-5SI#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LV5256ESP-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 R1LV5256ESP-5SI#S0 part is unused and in its original packaging.
Return procedure for R1LV5256ESP-5SI#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LV5256ESP-5SI#S0 Tags
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