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Renesas R1LV5256ESP-7SI#B0
- Part No.:
- R1LV5256ESP-7SI#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.330", 8.40mm Width)
- Datasheet:
-
R1LV5256ESP-7SI#B0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOP
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
R1LV5256ESP-7SI#B0 from Renesas Electronics is a 256Kb low-power static RAM organized as 32,768 × 8-bit, operating from a single 2.7–3.6V supply, with 70 ns access time and -40°C to +85°C industrial temperature range, packaged in 28-pin SOP. It serves as non-volatile memory buffer in battery-backed systems requiring zero refresh, TTL-compatible interfacing, and ultra-low standby current (1 µA typical at 3.0V).
For engineers reviewing the R1LV5256ESP-7SI#B0 datasheet, R1LV5256ESP-7SI#B0 pinout, R1LV5256ESP-7SI#B0 application, or R1LV5256ESP-7SI#B0 equivalent, key selection criteria include its 70 ns read timing, 1 µA standby current, 28-pin SOP package compatibility, and support for OR-tie data bus expansion without clocking circuitry.
Technical Context
The R1LV5256ESP-7SI#B0 implements a fully static CMOS memory array with asynchronous parallel interface, using address latching via A0–A14 inputs and bidirectional DQ0–DQ7 I/O lines. Chip select (CS#), write enable (WE#), and output enable (OE#) control logic enables independent read/write cycles and three-state output management.
Its architecture eliminates refresh circuitry and clocks, relying on stable DC bias for data retention down to 2.0V Vcc. Standby mode is activated by high CS#, disabling internal buffers and reducing ICC to ≤10 µA across full temperature range, while maintaining data integrity without external backup power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 Kbit (32k × 8-bit) - supports byte-wide data transfers in microcontroller peripheral interfaces. |
| Access Time | 70 ns - defines maximum read latency when CS# and OE# are asserted under 3.0V/25°C conditions. |
| Supply Voltage | 2.7–3.6 V - enables direct integration with 3.3V logic domains without level-shifting. |
| Standby Current | 10 µA max at +85°C - ensures multi-year battery life in always-on backup memory applications. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded controllers and automotive body electronics. |
| I/O Interface | TTL-compatible inputs/outputs - simplifies connection to legacy 3.3V microcontrollers and FPGAs without interface logic. |
| Data Retention Vcc | 2.0 V min - allows continued data hold during brown-out or battery sag without capacitor hold-up. |
Pinout & Package
Package: 28-pin plastic SOP (450-mil), PRSP0028DB-B footprint (28P2W-C), tube packaging (30 pcs/tube).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 2.7–3.6V supply rail; decoupling required within 10 mm of pin. |
| Vss | Ground | System reference ground; must be low-impedance connection shared with controller GND. |
| A0–A14 | Address input | 15-bit address bus supporting full 32k-word addressing; no internal latching. |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus with three-state control; supports OR-tie bus sharing. |
| CS# | Chip select | Active-low enable for all internal operations; high state forces full standby mode. |
| WE# | Write enable | Active-low write strobe; controls write cycle initiation with CS# and address setup. |
| OE# | Output enable | Active-low read 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 designs. |
| 1 µA typical standby current | Enables >10-year data retention on coin-cell batteries in metering and logging applications. |
| Common Data I/O (DQ0–DQ7) | Reduces PCB trace count and simplifies routing versus separate data-in/data-out architectures. |
| OR-tie capability | Allows multiple R1LV5256ESP-7SI#B0 devices to share a single 8-bit data bus without external logic. |
| TTL-compatible signaling | Direct interface with legacy 3.3V MCUs (e.g., Renesas RL78, ST STM32F1) without level shifters. |
Applications
| Industrial Data Logger | Medical Device Memory Buffer |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature/humidity every 5 minutes with firmware-triggered data dump. IC Role / Device Role / Timing Role: Non-volatile SRAM buffer holding up to 32k bytes of timestamped readings before USB/UART upload. Use Value: 70 ns access time enables fast burst reads during upload; 1 µA standby extends 10-year CR2032 battery life. |
Use Scenario: Portable ECG monitor storing 30 seconds of raw 12-bit waveform data prior to Bluetooth transmission. IC Role / Device Role / Timing Role: High-reliability intermediate storage between analog front-end ADC and wireless MCU subsystem. Use Value: -40°C to +85°C rating ensures operation in clinical and field environments; no refresh avoids timing-critical MCU interrupts. |
| Automotive Body Control Module | POS Terminal Configuration Storage |
Use Scenario: Door module retaining window position, mirror settings, and fault codes across ignition cycles. IC Role / Device Role / Timing Role: Backup memory powered by vehicle battery during sleep mode; retains critical user preferences. Use Value: 2.0V data retention threshold maintains contents during cold-crank voltage dips below 2.7V. |
Use Scenario: Retail terminal storing tax tables, pricing rules, and operator permissions updated nightly via Ethernet. IC Role / Device Role / Timing Role: Fast-access configuration store accessed randomly by ARM-based payment processor during transaction flow. Use Value: 28-pin SOP footprint fits constrained space on payment board; TTL compatibility avoids signal integrity issues at 3.3V. |
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 (DQ0–DQ15), 10 ns access, 3.3V only, 44-pin TSOP | Higher bandwidth but requires PCB redesign; unsuitable for 8-bit-only systems | Select only if system demands 16-bit data path and faster timing; not pin-compatible. |
| AS6C4008-70SCN | Same 8-bit bus, 70 ns access, 2.7–3.6V, but 28-pin SOJ package and 25 µA standby current | Higher standby draw reduces battery life in always-on applications | Acceptable for mains-powered systems where standby current is non-critical; different package footprint. |
Compared with IS61LV25616AL-10TLI and AS6C4008-70SCN, the R1LV5256ESP-7SI#B0 uniquely balances 8-bit simplicity, 1 µA standby, and industrial temperature range in a standard 28-pin SOP-making it optimal for cost-sensitive, battery-backed embedded designs where layout reuse and longevity are prioritized over raw speed or bus width.
Availability
R1LV5256ESP-7SI#B0 is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory buffers, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for R1LV5256ESP-7SI#B0 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 R1LV5256E Series was designed specifically for low-voltage, low-power embedded systems needing simple parallel SRAM with battery backup capability-emphasizing ease of interface, minimal external components, and extended data retention without refresh.
FAQ
What is the maximum operating temperature range for the R1LV5256ESP-7SI#B0?
The R1LV5256ESP-7SI#B0 is rated for industrial operation from -40°C to +85°C, as confirmed by its "I" suffix in the ordering code and validated in the DC Operating Conditions table (page 5). This range applies to both active operation and data retention modes, making it suitable for under-hood automotive and outdoor industrial deployments where thermal cycling occurs.
Does the R1LV5256ESP-7SI#B0 require a clock signal or refresh circuitry?
No, the R1LV5256ESP-7SI#B0 is a fully static RAM and requires neither a clock nor periodic refresh. Its internal CMOS latch structure retains data indefinitely as long as Vcc remains within 2.0–3.6V and CS# is held high during standby. This eliminates timing-critical refresh interrupts in microcontroller firmware and simplifies system design.
What package type and pin count does the R1LV5256ESP-7SI#B0 use?
The R1LV5256ESP-7SI#B0 uses a 28-pin plastic SOP (small outline package) with 450-mil width, designated PRSP0028DB-B (28P2W-C). Pinout matches standard 28-pin parallel SRAM layouts, including dedicated A0–A14 address, DQ0–DQ7 data, and CS#/WE#/OE# control lines-enabling drop-in replacement in existing SOP-based designs.
How much current does the R1LV5256ESP-7SI#B0 draw in standby mode?
The R1LV5256ESP-7SI#B0 draws ≤10 µA in standby mode at +85°C and ≤1 µA typical at +25°C with Vcc = 3.0V, as specified in the DC Characteristics table (page 5). This ultra-low ISB1 current enables multi-year operation on primary lithium batteries in remote sensors and portable diagnostics equipment.
Is the R1LV5256ESP-7SI#B0 compatible with 3.3V microcontrollers?
Yes, the R1LV5256ESP-7SI#B0 is fully TTL-compatible with VIH = 2.0V min and VIL = 0.6V max, ensuring reliable interfacing with standard 3.3V microcontrollers (e.g., Renesas RL78/G13, NXP LPC1769) without level-shifting circuitry. Its 2.7–3.6V Vcc range aligns precisely with 3.3V ±10% supply rails.
R1LV5256ESP-7SI#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.330", 8.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOP
R1LV5256ESP-7SI#B0 FAQ
1.How can I place an order for R1LV5256ESP-7SI#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LV5256ESP-7SI#B0 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-7SI#B0 reliable?
The price and inventory of R1LV5256ESP-7SI#B0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LV5256ESP-7SI#B0 is usually 5 days.
3.What payment methods are accepted for R1LV5256ESP-7SI#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LV5256ESP-7SI#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LV5256ESP-7SI#B0?
R1LV5256ESP-7SI#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LV5256ESP-7SI#B0 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-7SI#B0?
For technical support, including R1LV5256ESP-7SI#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LV5256ESP-7SI#B0 requirements.
6.How does Aetrix verify that R1LV5256ESP-7SI#B0 is sourced from the original manufacturer or authorized distributors?
All R1LV5256ESP-7SI#B0 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-7SI#B0 meets industry standards.
7.What is the process for return or replacement of R1LV5256ESP-7SI#B0?
All R1LV5256ESP-7SI#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LV5256ESP-7SI#B0, 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-7SI#B0 part is unused and in its original packaging.
Return procedure for R1LV5256ESP-7SI#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LV5256ESP-7SI#B0 Tags
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