My Inquiry
My Account
Renesas R1LV5256ESA-7SI#B0
- Part No.:
- R1LV5256ESA-7SI#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
R1LV5256ESA-7SI#B0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,215
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R1LV5256ESA-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, -40°C to +85°C industrial temperature range, and housed in an 8mm×13.4mm 28-pin TSOP package. It serves as non-refreshing, battery-backed memory in portable instrumentation and embedded control systems requiring TTL-compatible interfacing and ultra-low standby current.
For engineers reviewing the R1LV5256ESA-7SI#B0 datasheet, R1LV5256ESA-7SI#B0 pinout, R1LV5256ESA-7SI#B0 application, or R1LV5256ESA-7SI#B0 equivalent, key selection criteria include its 70 ns read timing, 1 µA typical standby current at 3.0V, TSOP package footprint, industrial-grade temperature rating, and compatibility with simple parallel bus architectures without clock or refresh circuitry.
Technical Context
The R1LV5256ESA-7SI#B0 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 cycles and internal clocks, relying solely on address and control signal transitions for read/write operations.
All I/Os are TTL-compatible with VIH ≥ 2.0 V and VIL ≤ 0.6 V, and it features three-state outputs with OR-tie capability enabled by OE#-controlled bus isolation. The device enters data retention mode when CS# is high and Vcc drops to as low as 2.0 V, drawing ≤10 µA at +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 Kbit (32,768 × 8-bit) - supports byte-wide data paths without external multiplexing |
| Access Time | 70 ns max - enables reliable operation with microcontrollers and ASICs running at ≤14 MHz bus clocks |
| Supply Voltage | 2.7–3.6 V - compatible with 3.3 V system rails and battery-backed 3 V coin-cell operation |
| Standby Current | 10 µA max at +85°C - extends battery life in always-on backup memory applications |
| Operating Temp | -40°C to +85°C - qualified for industrial environments including factory automation and outdoor telemetry |
| Data Retention Vcc | 2.0 V min - maintains stored data during brown-out or backup power switchover |
| I/O Interface | TTL-compatible inputs/outputs - interfaces directly with legacy 3.3 V or 5 V logic without level shifters |
Pinout & Package
Package: 28-pin TSOP (normal-bend type), 8 mm × 13.4 mm body size, PTSA0028ZA-A (28P2C-A) footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 2.7–3.6 V supply rail; decoupling capacitor required within 10 mm |
| Vss | Ground | Signal and power return reference; must be connected to system ground plane |
| A0–A14 | Address inputs | 15-bit address bus accepting 0x0000–0x7FFF; no internal latching |
| DQ0–DQ7 | Bi-directional data I/O | 8-bit common bus; high-impedance when CS# or OE# inactive |
| CS# | Chip select (active low) | Enables memory access; high state forces standby and data retention mode |
| WE# | Write enable (active low) | Controls write cycle initiation; must be low concurrently with CS# for valid write |
| OE# | Output enable (active low) | Gates output drivers; prevents bus contention during shared-data-bus operation |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Eliminates external refresh controller or timer overhead in microcontroller-based systems |
| 1 µA typical standby current | Reduces quiescent power draw in battery-powered devices such as handheld meters and remote sensors |
| TTL-compatible I/O | Direct connection to legacy 3.3 V or 5 V logic families without voltage translation circuitry |
| OR-tie capable outputs | Allows multiple R1LV5256ESA-7SI#B0 devices to share a common data bus using wired-OR configuration |
| Low-voltage data retention | Maintains stored contents down to 2.0 V Vcc, enabling seamless transition to backup power sources |
Applications
| Portable Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes recording temperature, humidity, and pressure at 1-second intervals over 72-hour periods. IC Role / Device Role / Timing Role: Non-volatile buffer memory holding raw samples before periodic wireless upload; operates in low-power standby between reads. Use Value: 10 µA max ISB at +85°C extends coin-cell life beyond 3 years; 70 ns access supports burst sampling without CPU wait states. |
Use Scenario: Modular programmable logic controller with hot-swappable I/O cards handling analog input conditioning and digital status capture. IC Role / Device Role / Timing Role: Local configuration and transient data storage per module; accessed asynchronously by FPGA-based bus master. Use Value: TTL compatibility ensures interoperability with legacy 5 V backplane logic; TSOP package enables compact dual-layer PCB layout. |
| Medical Diagnostic Handhelds | Automotive Body Control Units |
Use Scenario: Portable ECG monitor storing waveform segments during patient acquisition prior to Bluetooth transmission to tablet. IC Role / Device Role / Timing Role: High-reliability scratchpad memory buffering digitized ADC streams; retains data during brief power interruptions. Use Value: Data retention down to 2.0 V Vcc preserves critical waveform fragments during battery swap or low-voltage events. |
Use Scenario: In-vehicle lighting and window control module managing user preferences, fault logs, and calibration offsets across ignition cycles. IC Role / Device Role / Timing Role: Parameter storage accessible by 8-bit MCU during boot; survives 12 V battery dips to 9 V without corruption. Use Value: Industrial temperature grade (-40°C to +85°C) ensures functionality in under-hood thermal environments; no refresh simplifies firmware design. |
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-7TLI | 16-bit bus (256K × 16), 70 ns, 3.3 V only, 44-pin TSOP | Higher density and wider bus; requires PCB redesign and bus-width adaptation | Choose when system demands >32 KB contiguous memory or 16-bit data path efficiency |
| AS6C4008-70ZIN | 256K × 8, 70 ns, 2.7–3.6 V, 28-pin SOJ (not TSOP), higher ISB (25 µA typ) | Same density and voltage but different package and higher standby current | Acceptable where SOJ footprint is available and 25 µA standby is tolerable |
Compared with IS61LV25616AL-7TLI and AS6C4008-70ZIN, the R1LV5256ESA-7SI#B0 offers optimal fit for space-constrained 8-bit systems needing TSOP packaging, lowest industrial-grade standby current, and guaranteed data retention at 2.0 V-without requiring bus-width changes or layout rework.
Availability
R1LV5256ESA-7SI#B0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC modules, and automotive body control units requiring stable component supply, long-lifecycle support, and consistent TSOP-28 sourcing.
Supply support for R1LV5256ESA-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 infrastructure markets.
The R1LV5256E Series was designed as low-voltage, low-power parallel SRAMs for battery-operated and energy-sensitive embedded systems requiring zero-refresh operation and robust data retention.
FAQ
What is the maximum access time specification for R1LV5256ESA-7SI#B0?
The R1LV5256ESA-7SI#B0 has a maximum address access time (tAA) of 70 ns and a maximum read cycle time (tRC) of 70 ns, both specified over the full industrial temperature range (-40°C to +85°C) and supply voltage range (2.7–3.6 V). These values ensure deterministic timing margins for 8-bit microcontrollers and FPGA-based controllers operating at up to 14 MHz bus frequencies.
Does R1LV5256ESA-7SI#B0 require a refresh circuit or clock signal?
No, the R1LV5256ESA-7SI#B0 is a fully static RAM and requires no refresh cycles or external clock signals. Its operation is purely asynchronous and controlled only by address, CS#, WE#, and OE# transitions. This eliminates refresh overhead in firmware and simplifies hardware design for battery-powered or safety-critical applications.
What is the minimum supply voltage at which R1LV5256ESA-7SI#B0 retains stored data?
The R1LV5256ESA-7SI#B0 guarantees data retention down to Vcc = 2.0 V, provided CS# remains high (≥ Vcc − 0.2 V) and all other inputs are in high-impedance or valid logic states. At this voltage, data retention current (ICCDR) is ≤10 µA at +85°C, enabling reliable operation during brown-out or backup power transitions.
Which package type does R1LV5256ESA-7SI#B0 use, and what is its footprint code?
The R1LV5256ESA-7SI#B0 uses an 8 mm × 13.4 mm 28-pin plastic TSOP (thin small-outline package) with normal-bend leads. Its official package code is PTSA0028ZA-A (also referenced as 28P2C-A), compatible with standard TSOP-28 reflow profiles and pick-and-place equipment.
Is R1LV5256ESA-7SI#B0 compatible with 5 V TTL logic levels?
Yes, the R1LV5256ESA-7SI#B0 features TTL-compatible inputs and outputs: VIH is defined as ≥2.0 V (minimum), and VOH is ≥2.4 V at IOH = −0.5 mA. While Vcc is limited to 2.7–3.6 V, the input thresholds accept standard 5 V TTL logic highs and lows, allowing direct interface with legacy 5 V microcontrollers via appropriate pull-up/pull-down biasing if needed.
R1LV5256ESA-7SI#B0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm 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-TSOP
R1LV5256ESA-7SI#B0 FAQ
1.How can I place an order for R1LV5256ESA-7SI#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LV5256ESA-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 R1LV5256ESA-7SI#B0 reliable?
The price and inventory of R1LV5256ESA-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 R1LV5256ESA-7SI#B0 is usually 5 days.
3.What payment methods are accepted for R1LV5256ESA-7SI#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LV5256ESA-7SI#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LV5256ESA-7SI#B0?
R1LV5256ESA-7SI#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LV5256ESA-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 R1LV5256ESA-7SI#B0?
For technical support, including R1LV5256ESA-7SI#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LV5256ESA-7SI#B0 requirements.
6.How does Aetrix verify that R1LV5256ESA-7SI#B0 is sourced from the original manufacturer or authorized distributors?
All R1LV5256ESA-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 R1LV5256ESA-7SI#B0 meets industry standards.
7.What is the process for return or replacement of R1LV5256ESA-7SI#B0?
All R1LV5256ESA-7SI#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LV5256ESA-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 R1LV5256ESA-7SI#B0 part is unused and in its original packaging.
Return procedure for R1LV5256ESA-7SI#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LV5256ESA-7SI#B0 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…
