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Renesas 71V256SA15PZGI8
- Part No.:
- 71V256SA15PZGI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
71V256SA15PZGI8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,643
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Product details
Overview
71V256SA15PZGI8 from Renesas Electronics is a 256K (32K × 8-bit) 3.3V CMOS static RAM designed for high-speed secondary cache in embedded and desktop systems. It delivers 15ns access time, operates across –40°C to +85°C industrial temperature range, draws ≤2mA standby current, and uses LVTTL-compatible I/O on a single 3.3V ±0.3V supply.
For engineers reviewing the 71V256SA15PZGI8 datasheet, 71V256SA15PZGI8 pinout, 71V256SA15PZGI8 application, or 71V256SA15PZGI8 equivalent, key selection criteria include industrial-grade reliability, TSOP-28 package compatibility, low-power standby mode activation via CS, and strict 3.3V-only operation without mixed-voltage support.
Technical Context
This SRAM implements asynchronous, byte-wide random-access memory with full TTL-compatible control logic (CS, WE, OE). Its architecture supports three distinct operational modes: active read/write, standby (CS HIGH), and full standby (CS at CMOS VIH level with zero input toggling), each with guaranteed power limits.
Timing is defined by independent AC parameters including tAA (15ns max), tRC (15ns), tCLZ (5ns), and tOHZ (9ns), all validated under VCC = 3.3V ±0.3V and industrial temperature conditions. The device requires no clock or refresh circuitry and maintains data integrity without external support components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256Kbit (32K × 8-bit) - provides sufficient capacity for L2 cache buffers in mid-performance processors |
| Access Time | 15ns max - enables direct interface with 66MHz system buses without wait states |
| Supply Voltage | 3.3V ±0.3V - mandates dedicated 3.3V rail; incompatible with 5V or dual-supply designs |
| Standby Current | ≤2mA - reduces system-level quiescent power in battery-backed or energy-sensitive applications |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and transportation electronics |
| I/O Compatibility | LVTTL - ensures interoperability with 3.3V microcontrollers, FPGAs, and ASICs without level-shifting |
| Package | 28-pin TSOP Type I (PZG28) - surface-mount footprint optimized for high-density PCB layouts |
Pinout & Package
71V256SA15PZGI8 is housed in a 28-pin TSOP Type I (PZG28) package measuring 18.4mm × 8.0mm × 1.2mm, with gull-wing leads and standard JEDEC MO-141AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; CMOS-compatible inputs |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; tri-stated when CS HIGH or OE HIGH during reads |
| CS | Chip Select | Active-low enable; drives device into low-power standby when HIGH (TTL or CMOS level) |
| WE | Write Enable | Active-low write control; latches data on falling edge when CS is LOW |
| OE | Output Enable | Active-low output gate; controls data bus drive during read cycles only |
| VCC | Power Supply | 3.3V ±0.3V primary supply; must be decoupled locally per layout guidelines |
| GND | Ground Reference | Signal and power return; requires low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Industrial Temperature Range | Rated for continuous operation from –40°C to +85°C - suitable for uncontrolled ambient deployments |
| Low-Power Standby Mode | Guaranteed ≤2mA ISB1 current under full standby (CS > VHC, f = 0) - extends battery life in portable systems |
| Fast Read/Write Timing | tAA = 15ns, tWC = 15ns - eliminates wait-state insertion for 66MHz CPU interfaces |
| TSOP-28 Packaging | PZG28 footprint - enables compact board area usage and automated SMT assembly compatibility |
| LVTTL Interface Compliance | VIH = 2.0V min, VIL = 0.8V max - ensures robust noise margin with 3.3V logic families |
Applications
| Industrial PLC Memory Buffer | Embedded Network Router Cache |
|---|---|
Use Scenario: Storing real-time I/O mapping tables and firmware scratchpad data in programmable logic controllers deployed in factory floors. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer interfacing directly with ARM9-based controller bus operating at 66MHz. Use Value: 15ns access time eliminates CPU wait states; industrial temp rating ensures uptime in non-climate-controlled enclosures. | Use Scenario: Holding packet forwarding lookup tables and session state in small-form-factor enterprise routers. IC Role / Device Role / Timing Role: Secondary cache between network processor and packet buffer memory subsystem. Use Value: ≤2mA standby current reduces thermal load in fanless router chassis; TSOP-28 enables dense memory stacking. |
| Medical Diagnostic Imaging Controller | Ruggedized Handheld Test Equipment |
Use Scenario: Temporary storage of image acquisition buffers and calibration coefficient tables in ultrasound front-end controllers. IC Role / Device Role / Timing Role: Volatile frame buffer supporting burst-mode pixel streaming from ADC interface. Use Value: LVTTL compatibility simplifies interface to FPGA-based timing engine; –40°C to +85°C rating covers clinical environment extremes. | Use Scenario: Storing configuration profiles and measurement history logs in portable multimeters and oscilloscopes. IC Role / Device Role / Timing Role: Non-refreshed working memory for microcontroller firmware during active measurement sessions. Use Value: Full standby mode (CS HIGH) cuts background power to <2mA - extends AA-battery runtime beyond 100 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS7C3256B-15JIN | Same 32K × 8 organization, 15ns speed, but uses 3.3V/2.5V dual-supply support and SOJ-28 package | Requires separate 2.5V supply option; SOJ-28 footprint incompatible with PZG28 land pattern | Select only if dual-voltage design exists and board layout allows SOJ-28 rework |
| IS61LV25616AL-15TQLI | 16-bit wide (32K × 16), 15ns, industrial temp, but consumes 35mA typical ICC vs. 85mA max for 71V256SA15PZGI8 | Double data width increases bandwidth but demands wider bus interface and different address decoding | Choose when system requires higher throughput and can accommodate 44-pin TQFP package and 16-bit data path |
Compared with AS7C3256B-15JIN and IS61LV25616AL-15TQLI, the 71V256SA15PZGI8 offers strict 3.3V-only operation, TSOP-28 compatibility, and proven low-standby-current behavior ideal for space-constrained industrial controllers where voltage rails and board real estate are tightly constrained.
Availability
71V256SA15PZGI8 is available at Aetrix Electronics and suitable for industrial PLC memory buffers, embedded network router cache, and medical diagnostic imaging controllers requiring stable component supply across extended product lifecycles.
Supply support for 71V256SA15PZGI8 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 IDT71V256SA family was developed by Integrated Device Technology (acquired by Renesas in 2019) specifically for high-reliability, low-power 3.3V SRAM applications in secondary cache and real-time buffer roles within industrial and communications equipment.
FAQ
What is the maximum operating frequency supported by the 71V256SA15PZGI8?
The 71V256SA15PZGI8 is an asynchronous SRAM with no internal clock; its effective interface speed is determined by access timing. With tAA = 15ns and tRC = 15ns, it supports reliable operation with CPU buses up to approximately 66MHz (1/15ns ≈ 66.7MHz), assuming proper setup/hold margins and signal integrity. The 71V256SA15PZGI8 does not specify or require a clock input.
Does the 71V256SA15PZGI8 support both commercial and industrial temperature grades?
Yes - the suffix "I" in 71V256SA15PZGI8 explicitly denotes the industrial temperature grade (–40°C to +85°C). The same speed grade (15ns) is available in commercial grade (0°C to +70°C) as 71V256SA15PZG8, but the 71V256SA15PZGI8 part is fully specified and tested across the extended industrial range.
Can the 71V256SA15PZGI8 operate from a 5V supply?
No - the 71V256SA15PZGI8 is strictly a 3.3V device. Its absolute maximum VCC rating is +4.6V, but recommended operating voltage is 3.0V to 3.6V. Applying 5V will exceed specifications, risk permanent damage, and invalidate all timing and DC parameter guarantees. The 71V256SA15PZGI8 requires a regulated 3.3V ±0.3V supply.
How does standby mode work on the 71V256SA15PZGI8?
Standby mode on the 71V256SA15PZGI8 is activated by driving the CS pin HIGH. When CS ≥ VIH (≥2.0V), the device enters low-power standby drawing ≤20mA (ISB). If CS is held at CMOS VIH level (>VCC – 0.2V) with no input toggling (f = 0), it achieves full standby (ISB1) consuming ≤2mA. The 71V256SA15PZGI8 automatically exits standby on next CS LOW transition.
Is the 71V256SA15PZGI8 pin-compatible with other 28-pin SRAMs like the 62256 series?
No - the 71V256SA15PZGI8 uses a non-standard pinout optimized for high-speed operation: A0–A14 occupy pins 1–2, 24–28 and 12–13; I/O0–I/O7 are distributed across pins 15–22; and control signals (CS, WE, OE) are placed at pins 23, 25, and 27. This differs from legacy 28-pin SRAMs such as the 62256 (which uses 32K × 8 but with different pin assignments), making direct replacement impossible without PCB redesign. The 71V256SA15PZGI8 requires its specific PZG28 footprint.
71V256SA15PZGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
71V256SA15PZGI8 FAQ
1.How can I place an order for 71V256SA15PZGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V256SA15PZGI8 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 71V256SA15PZGI8 reliable?
The price and inventory of 71V256SA15PZGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V256SA15PZGI8 is usually 5 days.
3.What payment methods are accepted for 71V256SA15PZGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V256SA15PZGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71V256SA15PZGI8?
71V256SA15PZGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V256SA15PZGI8 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 71V256SA15PZGI8?
For technical support, including 71V256SA15PZGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V256SA15PZGI8 requirements.
6.How does Aetrix verify that 71V256SA15PZGI8 is sourced from the original manufacturer or authorized distributors?
All 71V256SA15PZGI8 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 71V256SA15PZGI8 meets industry standards.
7.What is the process for return or replacement of 71V256SA15PZGI8?
All 71V256SA15PZGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 71V256SA15PZGI8, 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 71V256SA15PZGI8 part is unused and in its original packaging.
Return procedure for 71V256SA15PZGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71V256SA15PZGI8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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