My Inquiry
My Account
Renesas 71256L35YG8
- Part No.:
- 71256L35YG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
71256L35YG8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
71256L35YG8 from Renesas Electronics is a 256K (32K × 8-bit) low-power CMOS static RAM with 35ns maximum access time, TTL-compatible I/O, and 2V battery-backed data retention. It operates across commercial temperature range (0°C to +70°C), supports full standby mode with 3μA typical current, and is packaged in 28-pin 300-mil SOJ for high-density board layouts in legacy avionics and industrial control systems.
For engineers reviewing the 71256L35YG8 datasheet, 71256L35YG8 pinout, 71256L35YG8 application, or 71256L35YG8 equivalent, key selection criteria include its 35ns read cycle time, 2V data retention capability, military-grade reliability compliance (MIL-STD-883 Class B optional), SOJ package footprint, and compatibility with 5V ±10% supply rails in space-constrained embedded memory subsystems.
Technical Context
The 71256L35YG8 implements a fully decoded 15-bit address interface (A0–A14) driving a 262,144-bit memory array with bidirectional 8-bit I/O (I/O0–I/O7). Its control logic uses three independent active-low enables-CS, WE, and OE-with defined timing relationships for read/write cycle separation and output impedance control.
It features dual standby modes: TTL-level standby (ISB = 3mA max at VCC = 5.5V) triggered by CS > VIH, and full CMOS-level standby (ISB1 = 1.5μA typ) when CS > VHC and f = 0. Data retention at 2V is guaranteed across the commercial temperature range without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), single-port SRAM |
| Access Time (tAA) | 35ns max - defines minimum address-to-data valid delay in read cycles |
| Supply Voltage | 5.0V ±10% - compatible with standard TTL/CMOS 5V logic rails |
| Data Retention Voltage | 2.0V min - enables battery backup operation without voltage regulation |
| Standby Current (ISB1) | 1.5μA typ at VCC = 5.5V - enables ultra-low-power hold mode during system sleep |
| Operating Temperature | 0°C to +70°C - commercial grade, validated for non-extended environmental operation |
| Package | 28-pin SOJ (PJG28), 300-mil width - surface-mount, JEDEC-standard footprint |
Pinout & Package
71256L35YG8 is housed in a 28-pin Small Outline J-Lead (SOJ) package (code PJG28), 300-mil body width, with gull-wing leads suitable for reflow soldering and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit binary address bus selecting one of 32K memory locations |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface for read/write data transfer; high-impedance when disabled |
| CS | Chip Select | Active-low enable controlling device activation and standby entry/exit |
| WE | Write Enable | Active-low signal qualifying write cycles; must be low with CS low to store data |
| OE | Output Enable | Active-low control for output drivers; decouples data bus during reads only |
| VCC | Power Supply | +5V ±10% main supply; powers core logic and I/O buffers |
| GND | Ground Reference | 0V return path for all internal circuits and I/O signals |
Key Features
| Feature | Design Value |
|---|---|
| Low-power standby mode | 1.5μA typical ISB1 current enables multi-year battery backup without regulator overhead |
| TTL-compatible I/O levels | VIH = 2.2V min / VIL = 0.8V max ensures direct interfacing with legacy 5V microcontrollers and FPGAs |
| 2V data retention | Guaranteed memory state preservation down to 2.0V supply - eliminates need for external backup regulators |
| MIL-STD-883 Class B option | Available in military-grade variants (e.g., 71256L35DB) for radiation-tolerant, extended-temperature deployments |
| SOJ packaging | PJG28 300-mil SOJ provides mechanical robustness and thermal performance superior to plastic DIP in vibration-prone environments |
Applications
| Avionics Data Logging | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: Storing flight parameter snapshots during power interruption in certified cockpit recorders. IC Role / Device Role / Timing Role: Nonvolatile buffer holding critical telemetry between main power loss and battery switchover. Use Value: 2V data retention allows seamless transition to backup power without data corruption or controller intervention. |
Use Scenario: Caching sensor inputs and control outputs in programmable logic controllers operating in factory automation lines. IC Role / Device Role / Timing Role: High-speed scratchpad memory interfacing directly with 5V microcontroller data buses. Use Value: 35ns access time supports real-time I/O scanning at ≥10kHz loop rates without CPU wait states. |
| Military Communications Radio | Legacy Test Equipment Firmware Cache |
Use Scenario: Holding configuration tables and encryption keys in handheld tactical radios exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Secure, fast-access memory for cryptographic state and channel mapping data. Use Value: MIL-STD-883 qualified variants (e.g., 71256L35DB) provide verified reliability under shock, vibration, and thermal cycling. |
Use Scenario: Accelerating firmware execution in aging semiconductor test platforms where SRAM replacement is constrained by legacy PCB layout. IC Role / Device Role / Timing Role: Drop-in replacement for obsolete 28-pin SOJ SRAMs requiring identical pinout and timing. Use Value: PJG28 SOJ footprint and 35ns timing match original design requirements without board redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62256LL-45ZSXIT | 45ns access time; 32K × 8 organization; 5V supply; SOJ-28 package | Slower timing limits use in sub-22MHz bus systems; higher ISB (5μA) reduces battery life | Select when 45ns latency is acceptable and long-term Cypress supply continuity is preferred |
| AS6C4008-35TIN | 35ns access time; same 32K × 8 organization; 5V supply; SOJ-28; 2.2V min retention | Retention voltage marginally higher (2.2V vs. 2.0V); no MIL-STD-883 variant available | Choose for cost-sensitive commercial designs where military qualification is unnecessary |
Compared with 71256L35YG8, CY62256LL-45ZSXIT trades speed for broader vendor longevity, while AS6C4008-35TIN matches timing but lacks military-grade screening-making 71256L35YG8 optimal for designs requiring guaranteed 2V retention and upgrade paths to MIL-qualified versions.
Availability
71256L35YG8 is available at Aetrix Electronics and suitable for avionics data logging, industrial PLC memory buffering, and legacy test equipment firmware caching requiring stable component supply, long-lifecycle support, and drop-in compatibility with existing 28-pin SOJ SRAM footprints.
Supply support for 71256L35YG8 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 global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
The 71256L series belongs to Renesas' legacy high-reliability SRAM product line, designed specifically for mission-critical embedded systems requiring long-term availability, MIL-STD-883 compliance, and robust 5V operation in harsh environments.
FAQ
What is the maximum operating temperature range for the 71256L35YG8?
The 71256L35YG8 is rated for commercial temperature operation from 0°C to +70°C. While industrial-grade variants (e.g., 71256L35YGI8) support –40°C to +85°C, the YG8 suffix explicitly denotes the commercial-grade version with validated performance and reliability within that 0°C to +70°C range.
Does the 71256L35YG8 require external circuitry for 2V battery backup operation?
No, the 71256L35YG8 supports native 2V data retention without external regulators or charge pumps. When VCC drops to 2.0V, the device automatically enters data retention mode with ≤500μA typical current draw, preserving memory contents as long as the 2V supply remains stable.
Is the 71256L35YG8 pin-compatible with other 28-pin SOJ SRAMs like the 62256 family?
Yes, the 71256L35YG8 uses the industry-standard 28-pin SOJ pinout (PJG28) with identical A0–A14, I/O0–I/O7, CS, WE, OE, VCC, and GND assignments as the 62256-series devices. This enables direct replacement in legacy designs without PCB modification.
What is the standby current consumption of the 71256L35YG8 under full CMOS-level standby conditions?
Under full CMOS-level standby (ISB1), where CS > VHC and f = 0, the 71256L35YG8 draws 1.5μA typical current at VCC = 5.5V. This ultra-low quiescent current enables multi-year battery backup operation in always-on embedded systems.
Can the 71256L35YG8 be used in new designs despite its legacy status?
Yes-the 71256L35YG8 remains actively supported by Renesas with documented availability, traceable sourcing, and lifecycle coordination. Its proven reliability, SOJ packaging, and 2V retention make it suitable for new designs where long-term supply assurance and compatibility with established 5V architectures are required.
71256L35YG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
71256L35YG8 FAQ
1.How can I place an order for 71256L35YG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71256L35YG8 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 71256L35YG8 reliable?
The price and inventory of 71256L35YG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71256L35YG8 is usually 5 days.
3.What payment methods are accepted for 71256L35YG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71256L35YG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71256L35YG8?
71256L35YG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71256L35YG8 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 71256L35YG8?
For technical support, including 71256L35YG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71256L35YG8 requirements.
6.How does Aetrix verify that 71256L35YG8 is sourced from the original manufacturer or authorized distributors?
All 71256L35YG8 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 71256L35YG8 meets industry standards.
7.What is the process for return or replacement of 71256L35YG8?
All 71256L35YG8 units undergo pre-shipment inspection (PSI). If there is an issue with 71256L35YG8, 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 71256L35YG8 part is unused and in its original packaging.
Return procedure for 71256L35YG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71256L35YG8 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…
