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Renesas R1LP5256ESA-7SI#B0
- Part No.:
- R1LP5256ESA-7SI#B0
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
R1LP5256ESA-7SI#B0.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:232
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Product details
Overview
R1LP5256ESA-7SI#B0 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 70 ns access time and -40°C to +85°C industrial temperature range, packaged in 28-pin TSOP for battery-backed memory applications in portable instrumentation and embedded controllers.
For engineers reviewing the R1LP5256ESA-7SI#B0 datasheet, R1LP5256ESA-7SI#B0 pinout, R1LP5256ESA-7SI#B0 application, or R1LP5256ESA-7SI#B0 equivalent, key selection criteria include standby current (≤10 µA at +85°C), TTL-compatible I/O, no-refresh operation, and chip-select–based memory expansion capability in space-constrained industrial designs.
Technical Context
This device implements a fully static CMOS SRAM architecture with independent address, data, and control buffers, eliminating clock or refresh circuitry. Its three-state bidirectional DQ lines support OR-tie bus configurations, while CS#, WE#, and OE# enable precise control of read/write cycles and output contention prevention.
The R1LP5256ESA-7SI#B0 supports low-voltage data retention down to 2.0V with ≤10 µA ICCDR at +85°C, and features guaranteed timing across full voltage (4.5–5.5V) and temperature (-40°C to +85°C) ranges - validated per AC characteristics including tAA = 70 ns, tOE = 35 ns, and tWC = 70 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32k × 8-bit) - provides byte-wide data interface compatible with 8-bit microcontrollers and legacy bus architectures. |
| Access time | 70 ns - ensures compatibility with medium-speed 8/16-bit processors without wait-state insertion. |
| Supply voltage | 4.5 V to 5.5 V - operates within standard TTL/CMOS 5V rail tolerances, eliminating need for dedicated LDO regulation. |
| Standby current | ≤10 µA at +85°C - enables multi-year battery backup in nonvolatile memory retention mode. |
| Operating temperature | -40°C to +85°C - qualified for industrial-grade deployment in automotive body control modules and factory automation equipment. |
| I/O interface | TTL-compatible inputs/outputs - allows direct connection to 5V logic families without level-shifting circuitry. |
| Data retention voltage | 2.0 V minimum - maintains stored data during brown-out or battery-switchover events without external supervision. |
Pinout & Package
Package: 28-pin TSOP (8 mm × 13.4 mm, normal-bend type, PTSA0028ZA-A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power supply | Primary 4.5–5.5V supply input; decoupling required within 10 mm for stable high-speed operation. |
| Vss | Ground | Signal and power ground reference; must be connected to low-impedance PCB plane. |
| A0–A14 | Address input | 15-bit address bus supporting full 32k-word decoding; latched on rising edge of CS# or WE#. |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus with three-state outputs; enabled only when CS# = L and OE# = L during read. |
| CS# | Chip select | Active-low enable controlling all internal buffers; asserts retention mode when high and Vcc ≥ 2.0V. |
| WE# | Write enable | Active-low write strobe; initiates write cycle when CS# and WE# both low; controls Din buffer activation. |
| OE# | Output enable | Active-low output gate; prevents bus contention by forcing DQ lines to high-impedance when deasserted. |
Key Features
| Feature | Design Value |
|---|---|
| No refresh required | Eliminates external refresh controller or timer overhead, reducing firmware complexity and system power. |
| 1 µA typical standby current at 5.0V/25°C | Extends battery life in always-on monitoring systems where memory must retain state for months between wake-ups. |
| Common Data I/O with three-state outputs | Reduces PCB trace count and simplifies routing in dense layouts; supports shared bus topologies with multiple peripherals. |
| Easy memory expansion via CS# | Enables seamless bank selection using higher-order address bits, supporting up to 512 KB with two devices. |
| TTL-compatible signaling | Guarantees interoperability with legacy 5V microcontrollers (e.g., 8051, PIC18F, MSP430 with 5V I/O) without translation logic. |
Applications
| Portable Medical Monitor | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Battery-powered ECG data logger capturing waveform samples during patient transport with intermittent host communication. IC Role / Device Role / Timing Role: Nonvolatile data buffer retaining acquired samples during power loss or sleep mode, accessed via 8-bit parallel bus. Use Value: 2.0V data retention and ≤10 µA +85°C standby current ensure >3 years of backup operation on coin-cell battery. |
Use Scenario: Real-time status storage for digital input/output states in DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Fast-access scratchpad memory for scan-cycle variable storage, interfaced directly to 8-bit MCU data bus. Use Value: 70 ns access time eliminates wait states on 10 MHz bus; -40°C to +85°C rating ensures reliability in unconditioned cabinet environments. |
| Automotive Body Control Unit | Smart Energy Meter |
|
Use Scenario: Storing configuration parameters and fault logs in door module ECUs subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Parameter EEPROM replacement with faster random access and no wear-out limitations. Use Value: Industrial temperature grade and 5.5V absolute max rating withstand load-dump transients without latch-up. |
Use Scenario: Tamper-resistant event logging (power outages, demand peaks) in utility meters requiring decade-long data integrity. IC Role / Device Role / Timing Role: Secure, low-leakage memory bank isolated during mains failure to preserve critical timestamps. Use Value: ≤10 µA +85°C standby current and 2.0V retention threshold prevent data loss during extended brown-out conditions. |
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 (256K × 16), 10 ns access, 3.3V-only supply | Requires 16-bit data path and 3.3V system; not drop-in for 8-bit/5V designs | Select only if migrating to 3.3V architecture and wider bus bandwidth is needed. |
| AS6C4008-70SCN | 8-bit bus, 70 ns access, 5V supply, but 28-pin SOJ package (not TSOP) | Same timing and voltage, but different mechanical footprint and thermal profile | Acceptable for redesigns where board layout accommodates SOJ; not pin-compatible with TSOP socket. |
Compared with R1LP5256ESA-7SI#B0, IS61LV25616AL-10TLI offers higher speed and density but mandates 3.3V infrastructure, while AS6C4008-70SCN matches electrical specs but requires PCB rework due to SOJ packaging - neither is pin- or drop-in compatible.
Availability
R1LP5256ESA-7SI#B0 is available at Aetrix Electronics and suitable for industrial control systems, portable medical instrumentation, and automotive body electronics requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for R1LP5256ESA-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 is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and memory solutions for industrial, automotive, and infrastructure markets.
The R1LP5256E Series was designed specifically for low-power, battery-backed memory applications demanding high reliability, zero-refresh operation, and industrial temperature resilience - targeting portable and mission-critical embedded systems.
FAQ
What is the maximum operating voltage for R1LP5256ESA-7SI#B0?
The R1LP5256ESA-7SI#B0 has an absolute maximum Vcc rating of +7.0 V, but its specified operating range is strictly 4.5 V to 5.5 V. Operation outside this range may cause parametric degradation or permanent damage. The device's DC characteristics - including ICC1, ISB, and VOH - are guaranteed only within 4.5–5.5 V, and exceeding 5.5 V voids compliance with the published timing and leakage specifications.
Does R1LP5256ESA-7SI#B0 require external refresh circuitry?
No, the R1LP5256ESA-7SI#B0 is a fully static RAM and requires no refresh cycles or external timing control. Its CMOS cell design retains data indefinitely as long as Vcc remains within specification and CS# is held high during standby. This eliminates refresh overhead in firmware and removes associated power spikes and timing constraints found in DRAM-based systems.
Can R1LP5256ESA-7SI#B0 operate at 3.3V?
No, the R1LP5256ESA-7SI#B0 is not rated for 3.3V operation. Its minimum supply voltage is 4.5V, and VIH/VIL thresholds are defined relative to 5V logic levels (VIH ≥ 2.2V, VIL ≤ 0.8V). Attempting to power it at 3.3V will result in undefined behavior, failed reads/writes, and potential data corruption. For 3.3V systems, consider the IS61LV25616AL series instead.
What is the data retention capability of R1LP5256ESA-7SI#B0 during power loss?
The R1LP5256ESA-7SI#B0 retains stored data down to 2.0V Vcc with CS# held high, drawing ≤10 µA at +85°C. Retention time depends on backup capacitance and load, but with typical 100 µF hold-up capacitance, it sustains data for >100 ms after main supply collapse - sufficient for controlled save-and-shutdown sequences in industrial controllers.
Is R1LP5256ESA-7SI#B0 RoHS compliant?
Yes, the R1LP5256ESA-7SI#B0 is RoHS compliant per EU Directive 2011/65/EU, as confirmed in Renesas's official product change notices and material declarations. The TSOP package uses lead-free solderable terminations and halogen-free molding compound, meeting JEDEC J-STD-609A Class 1 requirements for moisture sensitivity and environmental compliance.
R1LP5256ESA-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
R1LP5256ESA-7SI#B0 FAQ
1.How can I place an order for R1LP5256ESA-7SI#B0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R1LP5256ESA-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 R1LP5256ESA-7SI#B0 reliable?
The price and inventory of R1LP5256ESA-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 R1LP5256ESA-7SI#B0 is usually 5 days.
3.What payment methods are accepted for R1LP5256ESA-7SI#B0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R1LP5256ESA-7SI#B0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R1LP5256ESA-7SI#B0?
R1LP5256ESA-7SI#B0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R1LP5256ESA-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 R1LP5256ESA-7SI#B0?
For technical support, including R1LP5256ESA-7SI#B0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R1LP5256ESA-7SI#B0 requirements.
6.How does Aetrix verify that R1LP5256ESA-7SI#B0 is sourced from the original manufacturer or authorized distributors?
All R1LP5256ESA-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 R1LP5256ESA-7SI#B0 meets industry standards.
7.What is the process for return or replacement of R1LP5256ESA-7SI#B0?
All R1LP5256ESA-7SI#B0 units undergo pre-shipment inspection (PSI). If there is an issue with R1LP5256ESA-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 R1LP5256ESA-7SI#B0 part is unused and in its original packaging.
Return procedure for R1LP5256ESA-7SI#B0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R1LP5256ESA-7SI#B0 Tags
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