My Inquiry
My Account
Renesas R1LV5256ESP-7SI#S0
- Part No.:
- R1LV5256ESP-7SI#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-SOIC (0.342", 8.69mm Width)
- Datasheet:
-
R1LV5256ESP-7SI#S0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,317
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R1LV5256ESP-7SI#S0 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, used for battery-backed memory in portable instrumentation and embedded control systems.
For engineers reviewing the R1LV5256ESP-7SI#S0 datasheet, R1LV5256ESP-7SI#S0 pinout, R1LV5256ESP-7SI#S0 application, or R1LV5256ESP-7SI#S0 equivalent, key selection criteria include standby current (≤10 µA at +85°C), TTL-compatible I/O, no-refresh operation, and SOP-28 packaging for space-constrained PCB layouts.
Technical Context
This device implements a fully static CMOS memory array with asynchronous parallel interface logic, supporting independent chip select (CS#), output enable (OE#), and write enable (WE#) controls. Its architecture eliminates refresh circuitry and clock dependencies, enabling deterministic read/write timing across voltage and temperature extremes.
All address (A0–A14), data (DQ0–DQ7), and control inputs are TTL-compatible, with three-state outputs enabling OR-tie bus expansion. The memory core retains data down to 2.0V Vcc while drawing ≤10 µA standby current at +85°C, making it suitable for low-power backup retention modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32k × 8-bit) - supports byte-wide data paths without external multiplexing |
| Access time | 70 ns - guarantees valid data within 70 ns after address/CS# stabilization for real-time control loops |
| Supply voltage | 2.7–3.6 V - compatible with 3.3V logic rails and brown-out tolerant down to 2.0V for data retention |
| Standby current | ≤10 µA at +85°C - enables multi-year battery backup in always-on monitoring devices |
| Operating temperature | -40°C to +85°C - qualified for industrial environments including factory automation and outdoor telemetry |
| I/O compatibility | TTL - interfaces directly with legacy microcontrollers and FPGAs without level-shifting |
| Package | 450-mil 28-pin SOP (PRSP0028DB-B) - surface-mount footprint with standard reflow profile support |
Pinout & Package
Package: 450-mil 28-pin plastic SOP (PRSP0028DB-B), 28P2W-C footprint, embossed tape (1000 pcs/reel).
| 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 | Signal reference for all I/O and internal logic; must be low-impedance plane |
| A0–A14 | Address input | 15-bit address bus selecting one of 32,768 locations; latched on CS# low transition |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; high-impedance when CS# or OE# high |
| CS# | Chip select | Active-low enable controlling address buffer and memory array activation |
| WE# | Write enable | Active-low signal initiating write cycle; low during data setup and hold windows |
| OE# | Output enable | Active-low control for output drivers; prevents bus contention during shared-memory access |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Eliminates external refresh controller and timing overhead in microcontroller-based systems |
| Low standby current | 1 µA typical at 3.0V/25°C enables >10-year coin-cell backup in portable meters |
| OR-tie capability | Three-state outputs allow multiple R1LV5256ESP-7SI#S0 devices to share a common data bus |
| Easy memory expansion | CS#-based chip selection simplifies adding parallel banks without address decoder logic |
| Single-supply operation | 2.7–3.6V range avoids dual-rail design complexity and reduces BOM count |
Applications
| Portable Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered environmental sensors record temperature/humidity at 1-minute intervals over 30 days. IC Role / Device Role / Timing Role: Non-volatile data buffer storing measurements between host uploads; retains data during power loss. Use Value: 10 µA max standby current at +85°C extends CR2032 battery life beyond 2 years in continuous logging mode. | Use Scenario: Modular PLC backplane with hot-swappable I/O cards requires local configuration storage per module. IC Role / Device Role / Timing Role: Configuration EEPROM replacement providing faster random-access reads for parameter loading at boot. Use Value: 70 ns access time enables full 32k-word config load in <2.3 ms, reducing system startup latency. |
| Medical Diagnostic Handhelds | Automotive Body Control Units |
Use Scenario: Portable ECG monitor stores waveform snippets prior to Bluetooth transmission to base station. IC Role / Device Role / Timing Role: High-reliability scratchpad memory buffering analog-to-digital samples before compression. Use Value: TTL-compatible I/O interfaces directly with AD7689 ADC and Cortex-M0+ MCU without level shifters. | Use Scenario: BCM stores door lock calibration values and seat position presets across ignition cycles. IC Role / Device Role / Timing Role: Retention memory preserving user settings during vehicle battery disconnect events. Use Value: Data retention down to 2.0V Vcc ensures settings survive 12V system dips below 9V during cranking. |
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 width (256K × 16), 10 ns access, 3.3V only, TSOP-44 package | Higher bandwidth but larger footprint; requires bus-width adaptation in 8-bit systems | Select when system demands >32 MB/s sustained throughput and board area permits 44-pin TSOP |
| AS6C4008-70SCN | 2.7–5.5V supply range, 70 ns access, 28-pin SOP, 15 mA active current (vs. 5 mA typ. for R1LV5256ESP-7SI#S0) | Broader voltage tolerance but higher active power; not optimized for ultra-low standby | Select when design requires 5V legacy compatibility and standby current >100 µA is acceptable |
Compared with IS61LV25616AL-10TLI and AS6C4008-70SCN, the R1LV5256ESP-7SI#S0 delivers optimal trade-off for space-constrained, battery-sensitive designs requiring guaranteed 70 ns timing, sub-10 µA industrial-temp standby, and direct 8-bit bus integration in SOP-28.
Availability
R1LV5256ESP-7SI#S0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R1LV5256ESP-7SI#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 R1LV5256E Series was designed specifically for low-voltage, low-power static RAM applications where battery operation, data retention during power loss, and simple parallel interfacing are critical-targeting portable, medical, and industrial edge devices.
FAQ
What is the maximum operating temperature specification for the R1LV5256ESP-7SI#S0?
The R1LV5256ESP-7SI#S0 is rated for industrial temperature operation from -40°C to +85°C, as confirmed by its "I" suffix and ordering code "-7SI#S0". This rating applies to all DC and AC electrical characteristics in the official Renesas datasheet R10DS0068EJ0100, including standby current, access time, and data retention behavior across the full range.
Does the R1LV5256ESP-7SI#S0 require an external clock or refresh signal?
No, the R1LV5256ESP-7SI#S0 is a fully static RAM and requires neither an external clock nor periodic refresh cycles. Its CMOS memory array retains data indefinitely as long as power and valid control signals are maintained, simplifying system design and eliminating timing-critical refresh overhead in microcontroller-based applications using the R1LV5256ESP-7SI#S0.
What is the data retention voltage threshold for the R1LV5256ESP-7SI#S0?
The R1LV5256ESP-7SI#S0 maintains data integrity down to Vcc = 2.0 V under data retention conditions (CS# ≥ Vcc − 0.2 V), as specified in the Low Vcc Data Retention Characteristics table on page 12 of the R10DS0068EJ0100 datasheet. At this voltage, standby current remains ≤10 µA at +85°C, enabling reliable operation during brown-out events.
Can the R1LV5256ESP-7SI#S0 be used in a 5V system?
No, the R1LV5256ESP-7SI#S0 is strictly a 2.7–3.6V device. Its absolute maximum Vcc rating is +4.6V, and input high voltage (VIH) is defined up to Vcc + 0.3V - applying 5V violates both supply and input voltage limits and risks permanent damage. For 5V systems, consider alternatives like AS6C4008-70SCN, not the R1LV5256ESP-7SI#S0.
What package type does the R1LV5256ESP-7SI#S0 use, and is it RoHS compliant?
The R1LV5256ESP-7SI#S0 uses a 450-mil 28-pin plastic SOP package (JEDEC MO-012AC, Renesas PRSP0028DB-B). Per Renesas documentation and product marking, it is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU requirements - confirmed in the "Environmental Matters" section of the R10DS0068EJ0100 datasheet and Renesas public compliance portal.
R1LV5256ESP-7SI#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.342", 8.69mm 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:
- 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#S0 FAQ
1.How can I place an order for R1LV5256ESP-7SI#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LV5256ESP-7SI#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-7SI#S0 reliable?
The price and inventory of R1LV5256ESP-7SI#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-7SI#S0 is usually 5 days.
3.What payment methods are accepted for R1LV5256ESP-7SI#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LV5256ESP-7SI#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LV5256ESP-7SI#S0?
R1LV5256ESP-7SI#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LV5256ESP-7SI#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-7SI#S0?
For technical support, including R1LV5256ESP-7SI#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LV5256ESP-7SI#S0 requirements.
6.How does Aetrix verify that R1LV5256ESP-7SI#S0 is sourced from the original manufacturer or authorized distributors?
All R1LV5256ESP-7SI#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-7SI#S0 meets industry standards.
7.What is the process for return or replacement of R1LV5256ESP-7SI#S0?
All R1LV5256ESP-7SI#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LV5256ESP-7SI#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-7SI#S0 part is unused and in its original packaging.
Return procedure for R1LV5256ESP-7SI#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LV5256ESP-7SI#S0 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
