My Inquiry
My Account
Renesas R1LP5256ESA-7SR#S0
- Part No.:
- R1LP5256ESA-7SR#S0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
R1LP5256ESA-7SR#S0.pdf
- Description:
- IC SRAM 256KBIT PAR 28TSOP I
- Quantity:
- Payment:
- Shipping:
Inventory:2,421
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R1LP5256ESA-7SR#S0 from Renesas Electronics is a 256Kb low-power static RAM organized as 32,768 × 8-bit, operating from a single 4.5V–5.5V supply with 55 ns access time, 0.6 µA typical standby current at 5.0V, and TTL-compatible I/O-designed for battery-backed memory systems in industrial controllers and portable instrumentation.
For engineers reviewing the R1LP5256ESA-7SR#S0 datasheet, R1LP5256ESA-7SR#S0 pinout, R1LP5256ESA-7SR#S0 application, or R1LP5256ESA-7SR#S0 equivalent, key selection criteria include data retention down to 2.0V, no-refresh operation, OR-tie capable three-state outputs, and TSOP-28 packaging for space-constrained PCB layouts.
Technical Context
The R1LP5256ESA-7SR#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 inputs (CS#, WE#, OE#) are active-low and TTL-compatible, enabling direct interfacing with legacy microcontrollers and FPGAs. The common DQ0–DQ7 bidirectional bus supports easy memory expansion via chip select chaining, while output enable prevents bus contention during shared-data-bus operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32,768 words × 8 bits) - supports byte-wide data paths without external multiplexing |
| Access time | 55 ns - enables compatibility with 12–15 MHz system buses in legacy embedded designs |
| Supply voltage | 4.5 V to 5.5 V - operates across standard 5V rail tolerances without regulation |
| Standby current | 0.6 µA typical at 5.0V/25°C - extends battery life in always-on backup mode |
| Data retention VCC | 2.0 V minimum - retains contents during brown-out or battery-switchover events |
| I/O interface | TTL-compatible inputs/outputs - eliminates level-shifting requirements with 5V logic families |
| Package | 28-pin TSOP (8 mm × 13.4 mm) - surface-mount footprint optimized for high-density industrial PCBs |
Pinout & Package
Package: 28-pin plastic TSOP (8 mm × 13.4 mm), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 4.5–5.5V supply input; decoupling capacitor required within 10 mm |
| Vss (GND) | Ground reference | Common return path for all signals and power; must be low-impedance plane |
| A0–A14 | Address inputs | 15-bit address bus supporting full 32k-word addressing; no latching required |
| DQ0–DQ7 | Bidirectional data I/O | Common 8-bit data bus with three-state control; supports OR-tie for wired-AND expansion |
| CS# | Chip select | Active-low enable; controls internal buffers and enters data retention mode when high |
| WE# | Write enable | Active-low write strobe; initiates write cycle on falling edge with CS# asserted |
| OE# | Output enable | Active-low read control; places DQ pins in high-impedance state when deasserted |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Eliminates external refresh circuitry and timing overhead-ideal for ultra-low-power battery backup |
| Low-voltage data retention | Maintains stored data down to 2.0V VCC, enabling seamless switchover between main and backup power sources |
| OR-tie capable outputs | Three-state DQ outputs allow multiple devices to share a common data bus without external logic |
| TTL-compatible signaling | Direct interface with legacy 5V microcontrollers, CPLDs, and ASICs without level translation |
| Small stand-by current | 0.6 µA typical at 5.0V/25°C reduces quiescent power in always-on monitoring applications |
Applications
| Industrial PLC Memory Buffer | Medical Device Data Logger |
|---|---|
Use Scenario: Storing real-time sensor readings and configuration parameters in programmable logic controllers during mains power loss. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer maintaining critical state data during brief AC interruptions. Use Value: Enables deterministic recovery after brown-out using 2.0V data retention and sub-µA standby draw. | Use Scenario: Capturing ECG waveforms and patient identifiers in portable diagnostic equipment powered by rechargeable Li-ion batteries. IC Role / Device Role / Timing Role: Primary working memory with zero-refresh operation to minimize power consumption during sleep cycles. Use Value: Extends battery runtime by 30+ hours per charge due to 0.6 µA typical ISB1 current. |
| Automotive Telematics Black Box | Test & Measurement Equipment FIFO |
Use Scenario: Recording vehicle CAN bus diagnostics and GPS timestamps in event-triggered crash recorders. IC Role / Device Role / Timing Role: High-reliability scratchpad memory capturing pre-crash data with guaranteed retention under wide temperature swings. Use Value: Operates across –40°C to +85°C with stable 55 ns access time and no refresh-induced latency spikes. | Use Scenario: Acting as a first-in-first-out buffer between high-speed ADC sampling and slower host processor transfers. IC Role / Device Role / Timing Role: Byte-wide synchronous memory providing deterministic 55 ns read/write timing for real-time waveform capture. Use Value: Supports continuous 12 MHz sampling with zero dropped samples due to absence of refresh cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 16-bit bus width (256K × 16), 10 ns access, 3.3V only, 44-pin TSOP | Requires PCB redesign for wider data bus and different voltage rail; higher speed but incompatible pinout | Select only if migrating to 3.3V systems and requiring faster access or wider word size |
| AS6C4008-55ZIN | 256K × 16 organization, 55 ns access, 5V supply, 44-pin SOJ | Larger package footprint and 16-bit interface necessitate layout changes; same voltage and timing but not drop-in | Prefer when existing design uses SOJ sockets or requires dual-byte parallel access |
Compared with IS61LV25616AL-10TLI and AS6C4008-55ZIN, the R1LP5256ESA-7SR#S0 offers pin-compatible 8-bit operation in compact 28-pin TSOP, lower standby current, and proven data retention below 2.5V-making it optimal for space- and power-constrained 5V legacy systems.
Availability
R1LP5256ESA-7SR#S0 is available at Aetrix Electronics and suitable for industrial PLC memory buffers, medical device data loggers, automotive telematics black boxes, and test & measurement equipment FIFOs requiring stable component supply across extended product lifecycles.
Supply support for R1LP5256ESA-7SR#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 R1LP5256E Series was developed to deliver low-power, no-refresh SRAM for battery-backed applications where reliability, long-term data retention, and simple 5V interfacing are critical-targeting industrial control, portable instrumentation, and safety-critical logging systems.
FAQ
What is the maximum operating temperature range for the R1LP5256ESA-7SR#S0?
The R1LP5256ESA-7SR#S0 is rated for continuous operation from –40°C to +85°C ambient temperature. This industrial-grade temperature range ensures reliable performance in harsh environments such as factory automation panels, outdoor telemetry units, and automotive under-hood modules. The device maintains specified timing and leakage parameters across this full range, with standby current rising predictably to 10 µA at +85°C.
Does the R1LP5256ESA-7SR#S0 require an external clock or refresh signal?
No, the R1LP5256ESA-7SR#S0 is a fully static RAM with no internal clock and zero refresh requirement. Its memory cells retain data indefinitely as long as power is applied and CS# remains asserted or VCC stays above 2.0V. This eliminates timing-critical refresh cycles, simplifies system design, and removes potential sources of data corruption in interrupt-driven or low-power applications using the R1LP5256ESA-7SR#S0.
Can the R1LP5256ESA-7SR#S0 be used in a 3.3V system?
No, the R1LP5256ESA-7SR#S0 is specified only for 4.5V to 5.5V operation and is not compatible with 3.3V logic levels or supply rails. Its input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V) and output drive strength (VOH ≥ 2.4V at –1mA) are designed for 5V TTL compatibility. Using it in a 3.3V system risks undervoltage lockout, marginal timing margins, and potential data corruption-R1LP5256ESA-7SR#S0 must be deployed in properly regulated 5V environments.
What is the meaning of "-7SR" in the R1LP5256ESA-7SR#S0 part number?
The "-7SR" suffix in R1LP5256ESA-7SR#S0 indicates a specific revision and assembly variant: "7" denotes the product revision level per Renesas internal change control, and "SR" identifies the manufacturing site and process lot configuration. This suffix does not affect electrical specifications or pinout-it reflects traceability and quality control metadata. All R1LP5256ESA-7SR#S0 units meet the full R1LP5256E Series specification including 55 ns access time and 0.6 µA standby current.
How does the R1LP5256ESA-7SR#S0 handle bus contention during multi-device sharing?
The R1LP5256ESA-7SR#S0 prevents bus contention through its active-low OE# (output enable) and CS# (chip select) controls. When OE# is high, all DQ0–DQ7 pins enter high-impedance state regardless of CS# status. Combined with three-state outputs and OR-tie capability, this allows multiple R1LP5256ESA-7SR#S0 devices to safely share a common data bus without external bus transceivers or arbitration logic.
R1LP5256ESA-7SR#S0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP I
R1LP5256ESA-7SR#S0 FAQ
1.How can I place an order for R1LP5256ESA-7SR#S0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP5256ESA-7SR#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 R1LP5256ESA-7SR#S0 reliable?
The price and inventory of R1LP5256ESA-7SR#S0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R1LP5256ESA-7SR#S0 is usually 5 days.
3.What payment methods are accepted for R1LP5256ESA-7SR#S0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP5256ESA-7SR#S0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP5256ESA-7SR#S0?
R1LP5256ESA-7SR#S0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP5256ESA-7SR#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 R1LP5256ESA-7SR#S0?
For technical support, including R1LP5256ESA-7SR#S0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP5256ESA-7SR#S0 requirements.
6.How does Aetrix verify that R1LP5256ESA-7SR#S0 is sourced from the original manufacturer or authorized distributors?
All R1LP5256ESA-7SR#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 R1LP5256ESA-7SR#S0 meets industry standards.
7.What is the process for return or replacement of R1LP5256ESA-7SR#S0?
All R1LP5256ESA-7SR#S0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP5256ESA-7SR#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 R1LP5256ESA-7SR#S0 part is unused and in its original packaging.
Return procedure for R1LP5256ESA-7SR#S0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP5256ESA-7SR#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…
