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Renesas 71V256SA15YG8
- Part No.:
- 71V256SA15YG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
71V256SA15YG8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:178
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Product details
Overview
71V256SA15YG8 from Renesas Electronics is a 3.3V CMOS static RAM organized as 32K × 8 (256K-bit), designed for high-speed secondary cache in 3.3V desktop and embedded systems. It delivers 15ns access time, operates across commercial temperature range (0°C to +70°C), consumes ≤2mA standby current, and uses LVTTL-compatible I/O on a single 3.3V ±0.3V supply.
For engineers reviewing the 71V256SA15YG8 datasheet, 71V256SA15YG8 pinout, 71V256SA15YG8 application, or 71V256SA15YG8 equivalent, key selection criteria include TTL-compatible timing margins, low-power standby mode activation via CS, SOJ-28 package footprint compatibility, and guaranteed tAA/tRC/tWC performance at 15ns speed grade under VCC = 3.3V ±0.3V.
Technical Context
The 71V256SA15YG8 implements asynchronous SRAM architecture with full address decoding and bidirectional data I/O lines. Its control logic supports three operating modes-read, write, and standby-governed by independent CS, WE, and OE signals, enabling flexible bus interface timing in processor-centric designs.
Standby power management is achieved through dual-level chip select: TTL-level CS (VIH) enables ISB ≤20mA, while CMOS-level CS (VHC) activates full standby with ISB1 ≤2mA and guaranteed power <6.6mW at f = 0. All inputs and outputs meet LVTTL voltage thresholds (VIH ≥2.0V, VIL ≤0.8V) and drive capabilities (IOH = –4mA, IOL = 8mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (256K-bit total); supports byte-wide data bus interfacing without external demultiplexing |
| Access Time (tAA) | 15ns max; ensures compatibility with 66MHz CPU bus cycles in secondary cache applications |
| Supply Voltage | 3.3V ±0.3V; matches standard 3.3V logic rails and eliminates need for level-shifting circuitry |
| Standby Current (ISB1) | ≤2mA at CMOS-level CS; extends battery life in portable or low-power embedded systems |
| I/O Compatibility | LVTTL; interoperates directly with Intel Pentium, AMD K6, and other 3.3V microprocessor families |
| Operating Temperature | 0°C to +70°C; validated for commercial-grade desktop, networking, and industrial control environments |
| Package Type | 28-pin 300-mil SOJ (PJG28); provides proven thermal and mechanical reliability in space-constrained PCB layouts |
Pinout & Package
71V256SA15YG8 is housed in a 28-pin 300-mil Small Outline J-Lead (SOJ) package (JEDEC MO-089A compliant), with lead pitch of 1.27mm and body width of 7.62mm. The package supports infrared reflow soldering and meets RoHS-compliant green material requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 32K unique locations; no internal latching required |
| I/O0–I/O7 | Bidirectional Data Lines | 8-bit parallel data path; high-impedance state during read/write transitions prevents bus contention |
| CS | Chip Select | Active-low enable; drives device into low-power standby when HIGH (TTL or CMOS level) |
| WE | Write Enable | Active-low signal controlling write cycle initiation; overlaps with CS to define valid write window |
| OE | Output Enable | Active-low control for output drivers; allows shared bus operation with multiple devices |
| VCC | Power Supply | 3.3V ±0.3V primary supply; decoupling capacitor placement near pin minimizes switching noise |
| GND | Ground Reference | Common return path for all digital signals; requires low-inductance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| 15ns Access Time | Enables direct integration into 66MHz CPU secondary cache subsystems without wait states |
| Full Standby Mode (ISB1 ≤2mA) | Reduces system power draw during idle periods, critical for fanless or thermally constrained enclosures |
| LVTTL-Compatible I/O | Eliminates need for external level translators when interfacing with 3.3V microprocessors and FPGAs |
| Single 3.3V Supply | Simplifies power delivery design by removing requirement for separate 5V or 2.5V rails |
| Green Material Construction | Meets RoHS Directive 2011/65/EU and JEDEC JS709C for halogen-free, lead-free assembly |
Applications
| Desktop CPU Secondary Cache | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: High-speed temporary storage between CPU core and main DRAM in legacy x86 desktop platforms. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write cycles synchronized to CPU address strobes. Use Value: 15ns tAA ensures full compatibility with 66MHz front-side bus timing, reducing memory latency by >40% versus slower 20ns variants. | Use Scenario: Real-time data buffering for analog I/O modules in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding configuration registers and process state variables during firmware updates. Use Value: ≤2mA ISB1 current enables continuous operation during brown-out conditions where main supply dips below 3.0V. |
| Network Router Packet Buffer | Medical Imaging Frame Store |
Use Scenario: Temporary packet queuing in Layer 2/3 switching ASICs requiring deterministic latency under burst traffic loads. IC Role / Device Role / Timing Role: Dual-port accessible SRAM acting as first-in-first-out (FIFO) buffer between MAC and PHY layers. Use Value: tCLZ ≤5ns and tOHZ ≤9ns guarantee sub-10ns output enable/disable transitions, minimizing inter-packet gap jitter. | Use Scenario: Intermediate frame storage in ultrasound or digital X-ray acquisition systems before JPEG compression and transmission. IC Role / Device Role / Timing Role: Burst-mode write SRAM capturing raw sensor data at up to 25MB/s sustained throughput. Use Value: tWP = 10ns and tDW = 7ns support reliable 8-bit parallel writes at 100MHz effective clock rate without external handshake logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS7C256-15JC | Same 32K × 8 organization, 15ns speed, but uses 28-pin SOIC package (wider 300-mil body, different lead form) | Requires PCB layout revision due to SOIC vs SOJ footprint mismatch; not drop-in compatible | Select only if SOIC mounting process is already established and thermal profile permits higher junction temperature rise |
| IS61LV25616AL-15TQLI | 16-bit wide (32K × 16), 15ns access, 3.3V supply, but requires 44-pin TSOP-II package and different pinout | Supports wider data paths but demands redesign of address/data bus routing and control logic | Choose when migrating to 16-bit architectures or when higher density per package is prioritized over pin compatibility |
Compared with AS7C256-15JC and IS61LV25616AL-15TQLI, the 71V256SA15YG8 offers verified SOJ-28 footprint compatibility, guaranteed 2mA full-standby current, and native LVTTL timing margins - making it optimal for cost-sensitive, space-constrained 8-bit cache upgrades without board re-spin.
Availability
71V256SA15YG8 is available at Aetrix Electronics and suitable for desktop computing, industrial automation, and medical imaging applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for 71V256SA15YG8 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with headquarters in Tokyo, Japan.
The IDT71V256SA family was originally developed by Integrated Device Technology (acquired by Renesas in 2019) to serve high-performance, low-power 3.3V SRAM needs in CPU cache and real-time control subsystems.
FAQ
What is the maximum operating frequency supported by the 71V256SA15YG8?
The 71V256SA15YG8 is an asynchronous SRAM and does not have a clock input or maximum operating frequency specification. Its performance is defined by timing parameters such as tRC = 15ns (read cycle time) and tWC = 15ns (write cycle time), which correspond to effective bus rates up to approximately 66MHz in burst-access configurations. System timing must be derived from these AC specifications rather than a fixed clock frequency.
Does the 71V256SA15YG8 require external pull-up resistors on its control pins?
No, the 71V256SA15YG8 does not require external pull-up resistors on CS, WE, or OE. Its input thresholds (VIH ≥2.0V, VIL ≤0.8V) are fully compatible with standard 3.3V LVTTL logic drivers, and internal input structures do not rely on weak pull-ups. External termination is only needed if bus stubs exceed signal integrity limits - not for basic logic-level compliance.
Can the 71V256SA15YG8 operate reliably at 3.0V supply voltage?
Yes, the 71V256SA15YG8 is specified to operate across VCC = 3.0V to 3.6V. At 3.0V minimum supply, DC parameters including VOH ≥2.4V and VOL ≤0.4V remain guaranteed, and AC timing (tAA, tRC, tWC) holds at 15ns under industrial-grade test conditions. This margin supports brown-out resilience in battery-backed or unregulated power domains.
Is the 71V256SA15YG8 pin-compatible with earlier 5V SRAMs like the 62256?
No, the 71V256SA15YG8 is not pin-compatible with 5V SRAMs such as the 62256. Although both are 28-pin SOJ devices with identical pin count and physical layout, the 71V256SA15YG8 uses LVTTL voltage levels (3.3V), lacks VPP programming voltage pin, and has different internal timing control logic. Direct replacement would cause logic-level mismatch and potential damage due to overvoltage on inputs.
What is the meaning of the 'Y' and 'G8' suffixes in 71V256SA15YG8?
In 71V256SA15YG8, 'Y' denotes the 28-pin 300-mil SOJ package (PJG28), 'G' indicates green (halogen-free, lead-free) material construction, and '8' specifies tape-and-reel packaging format per EIA-481-D standard. This ordering code confirms RoHS compliance, automated SMT readiness, and mechanical compatibility with standard SOJ-28 pick-and-place equipment.
71V256SA15YG8 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
71V256SA15YG8 FAQ
1.How can I place an order for 71V256SA15YG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V256SA15YG8 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 71V256SA15YG8 reliable?
The price and inventory of 71V256SA15YG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V256SA15YG8 is usually 5 days.
3.What payment methods are accepted for 71V256SA15YG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V256SA15YG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71V256SA15YG8?
71V256SA15YG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V256SA15YG8 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 71V256SA15YG8?
For technical support, including 71V256SA15YG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V256SA15YG8 requirements.
6.How does Aetrix verify that 71V256SA15YG8 is sourced from the original manufacturer or authorized distributors?
All 71V256SA15YG8 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 71V256SA15YG8 meets industry standards.
7.What is the process for return or replacement of 71V256SA15YG8?
All 71V256SA15YG8 units undergo pre-shipment inspection (PSI). If there is an issue with 71V256SA15YG8, 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 71V256SA15YG8 part is unused and in its original packaging.
Return procedure for 71V256SA15YG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71V256SA15YG8 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
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