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Renesas R1LP5256ESP-5SR#S0
- Part No.:
- R1LP5256ESP-5SR#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.330", 8.38mm Width)
- Datasheet:
-
R1LP5256ESP-5SR#S0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOP
- Quantity:
- Payment:
- Shipping:
Inventory:552
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Product details
Overview
R1LP5256ESP-5SR#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 4.5–5.5V supply with 55ns access time and 1µA typical standby current at 5.0V, designed for battery-backed memory applications in industrial control and embedded instrumentation.
For engineers reviewing the R1LP5256ESP-5SR#S0 datasheet, R1LP5256ESP-5SR#S0 pinout, R1LP5256ESP-5SR#S0 application, or R1LP5256ESP-5SR#S0 equivalent, key selection criteria include TTL-compatible I/O, no-refresh operation, OR-tie capable three-state outputs, chip-select expandability, and 28-pin SOP packaging with embossed tape reel delivery (1000 pcs/reel).
Technical Context
The R1LP5256ESP-5SR#S0 implements a fully static memory architecture with no internal clocks or refresh circuitry, relying on address decoding and control logic (CS#, WE#, OE#) to manage read/write cycles and output enable/disable states. Its block diagram confirms a 32k-word × 8-bit memory array with dedicated column/row decoders, sense/write amplifiers, and input/output buffers.
All digital inputs meet TTL voltage thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V), and outputs drive ±1mA loads while maintaining VOH ≥ 2.4V and VOL ≤ 0.4V. Standby mode is activated by CS# high, reducing ICC to ≤3µA over temperature (≤1µA at +25°C), enabling long-term data retention down to VCC = 2.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 8 bits - supports byte-wide data bus interfacing without external data multiplexing. |
| Access Time | 55 ns - guarantees valid read data within 55 ns after address and CS# stabilization, meeting real-time microcontroller interface timing. |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5V logic systems and tolerant of ±10% rail variation. |
| Standby Current | 1 µA typical at 5.0V, +25°C - enables multi-year battery backup in power-critical applications like metering and sensor nodes. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade industrial equipment and office automation systems. |
| Package | 450-mil 28-pin plastic SOP (PRSP0028DB-B) - surface-mount compatible with standard reflow profiles and board-level test accessibility. |
| I/O Interface | TTL-compatible inputs and three-state outputs - allows direct connection to 5V microcontrollers and bus sharing via OE# control. |
Pinout & Package
Package: 450-mil 28-pin plastic SOP (PRSP0028DB-B), lead pitch 1.27 mm, body width 7.62 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 4.5–5.5V supply rail; decoupling capacitor required near pin for noise immunity. |
| Vss | Ground | Reference ground for all I/O and internal logic; must be low-impedance connection to system GND plane. |
| A0–A14 | Address input | 15-bit address bus supporting full 32k-word addressing; driven by CPU or controller address lines. |
| DQ0–DQ7 | Data input/output | Bidirectional 8-bit data bus; high-impedance when CS# high or OE# high, enabling bus sharing. |
| CS# | Chip select | Active-low enable controlling device activation; used for memory expansion via address decoding. |
| WE# | Write enable | Active-low signal initiating write cycle; latches DQ0–DQ7 data into memory on falling edge with CS# low. |
| OE# | Output enable | Active-low control for output buffer; prevents bus contention during read operations or multi-device sharing. |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Eliminates external refresh circuitry and timing overhead, simplifying system design and reducing firmware complexity. |
| OR-tie capability | Three-state outputs allow multiple R1LP5256ESP-5SR#S0 devices to share a common data bus without external logic. |
| Low-voltage data retention | Maintains stored data down to VCC = 2.0V, enabling reliable operation during brown-out or battery-fallback conditions. |
| TTL-compatible I/O | Direct interface with legacy 5V microcontrollers and FPGAs without level-shifting components. |
| Small stand-by current | 1 µA typical at +25°C ensures minimal battery drain in always-on monitoring systems with infrequent memory access. |
Applications
| Industrial Programmable Logic Controllers (PLCs) | Smart Energy Meters |
|---|---|
Use Scenario: Storing configuration parameters, calibration tables, and event logs in DIN-rail mounted PLCs with limited power budget. IC Role / Device Role / Timing Role: Non-volatile shadow RAM holding critical runtime data during power loss; accessed via 8-bit parallel bus at ≤55ns latency. Use Value: Enables deterministic boot-up and state recovery without external EEPROM or battery-backed SRAM controllers. |
Use Scenario: Capturing time-stamped consumption data and tariff schedules in utility-grade electricity meters operating on primary lithium batteries. IC Role / Device Role / Timing Role: Primary working memory for metrology engine and communication stack; retains data during mains outage using VCC fallback. Use Value: Achieves >10-year battery life via 1µA standby current and 2.0V data retention threshold. |
| Medical Diagnostic Handhelds | Factory Automation HMI Terminals |
Use Scenario: Buffering waveform samples and patient settings in portable ECG or pulse oximeter units with intermittent USB charging. IC Role / Device Role / Timing Role: High-reliability scratchpad memory interfaced to 8-bit MCU; accessed during active measurement bursts only. Use Value: Prevents data corruption during rapid power cycling and eliminates refresh-induced jitter in analog sampling windows. |
Use Scenario: Caching machine status, recipe data, and operator inputs in panel-mounted HMIs exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-grade memory supporting 0°C to +70°C operation with robust 55ns read timing across voltage and temperature. Use Value: Ensures deterministic UI responsiveness and avoids timeout errors in real-time control loop supervision. |
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 (128k word × 16), 10ns access, 3.3V-only supply, 44-pin TSOP | Higher bandwidth but incompatible voltage and bus width; requires PCB redesign and level translation. | Select only if migrating to 3.3V systems and needing wider data path; not drop-in for R1LP5256ESP-5SR#S0. |
| AS6C4008-55PCN | 8-bit bus, 55ns access, 4.5–5.5V supply, 28-pin SOP, but 4096k × 8 organization (32Mbit) | Same package and interface but 128× larger capacity; higher ICC1 (45mA vs. 35mA) and ISB (5µA vs. 1µA typical). | Choose when memory footprint must remain identical but capacity scaling is needed; verify layout thermal margin for higher power. |
Compared with IS61LV25616AL-10TLI and AS6C4008-55PCN, the R1LP5256ESP-5SR#S0 uniquely balances ultra-low standby current (1µA), 5V compatibility, and 28-pin SOP fit-making it optimal for cost-sensitive, battery-constrained 8-bit designs where capacity and speed are fixed at 256Kb/55ns.
Availability
R1LP5256ESP-5SR#S0 is available at Aetrix Electronics and suitable for industrial PLCs, smart energy meters, and medical handhelds requiring stable component supply, long-lifecycle support, and RoHS-compliant 28-pin SOP packaging.
Supply support for R1LP5256ESP-5SR#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 enterprise applications.
The R1LP5256E Series was developed as a low-power, no-refresh SRAM family targeting battery-operated and space-constrained embedded systems requiring reliable 5V parallel memory with minimal support circuitry.
FAQ
What is the maximum operating temperature range for the R1LP5256ESP-5SR#S0?
The R1LP5256ESP-5SR#S0 is rated for operation from 0°C to +70°C (R-version). This commercial-grade temperature range is validated per the datasheet's DC operating conditions table and applies to all electrical specifications including access time and standby current. The R1LP5256ESP-5SR#S0 does not support extended industrial temperatures (–40°C to +85°C); that range applies only to variants ending in "I" such as R1LP5256ESP-5SI#S0.
Does the R1LP5256ESP-5SR#S0 require an external clock or refresh signal?
No, the R1LP5256ESP-5SR#S0 is a fully static RAM with no internal clock and zero refresh requirement. Data retention is maintained as long as VCC remains within 2.0–5.5V and CS# is held high in standby. This eliminates timing-critical refresh cycles and simplifies integration with microcontrollers lacking dedicated DRAM controllers.
What is the pin-compatible replacement for R1LP5256ESP-5SR#S0 in 28-pin SOP?
There is no documented pin-compatible replacement for the R1LP5256ESP-5SR#S0. While AS6C4008-55PCN shares the same 28-pin SOP footprint and 8-bit interface, its pinout differs: A15 is present, Vcc/Vss locations vary, and it lacks the exact CS#/WE#/OE# timing behavior. Direct substitution would require PCB revision and firmware validation.
How much current does the R1LP5256ESP-5SR#S0 draw during active read operations?
The R1LP5256ESP-5SR#S0 draws up to 35 mA average operating current (ICC1) under worst-case conditions: minimum cycle time, 100% duty, and zero I/O load. Typical active current is 25 mA at 5.0V and +25°C. This value is measured with CS# low, address stable, and OE# low during read - not during standby or write cycles.
Can the R1LP5256ESP-5SR#S0 retain data at 3.0V supply voltage?
Yes, the R1LP5256ESP-5SR#S0 supports data retention down to VCC = 2.0V. At 3.0V, it maintains full data integrity with a typical retention current of 2 µA at +25°C. The datasheet specifies this behavior in the Low Vcc Data Retention Characteristics table (Page 12), confirming reliable operation during brown-out or battery-fallback scenarios.
R1LP5256ESP-5SR#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.330", 8.38mm Width)
- Packaging:
- Bulk
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOP
R1LP5256ESP-5SR#S0 FAQ
1.How can I place an order for R1LP5256ESP-5SR#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP5256ESP-5SR#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-5SR#S0 reliable?
The price and inventory of R1LP5256ESP-5SR#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-5SR#S0 is usually 5 days.
3.What payment methods are accepted for R1LP5256ESP-5SR#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP5256ESP-5SR#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP5256ESP-5SR#S0?
R1LP5256ESP-5SR#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP5256ESP-5SR#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-5SR#S0?
For technical support, including R1LP5256ESP-5SR#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP5256ESP-5SR#S0 requirements.
6.How does Aetrix verify that R1LP5256ESP-5SR#S0 is sourced from the original manufacturer or authorized distributors?
All R1LP5256ESP-5SR#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-5SR#S0 meets industry standards.
7.What is the process for return or replacement of R1LP5256ESP-5SR#S0?
All R1LP5256ESP-5SR#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP5256ESP-5SR#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-5SR#S0 part is unused and in its original packaging.
Return procedure for R1LP5256ESP-5SR#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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