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Renesas IDT71V256SA15PZ8
- Part No.:
- IDT71V256SA15PZ8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA15PZ8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
IDT71V256SA15PZ8 from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM designed for secondary cache in 3.3V processor systems. It delivers 15ns access time, operates on a single 3.3V ±0.3V supply, supports industrial temperature range (–40°C to +85°C), and features LVTTL-compatible I/O for seamless integration with contemporary microprocessors.
For engineers reviewing the IDT71V256SA15PZ8 datasheet, IDT71V256SA15PZ8 pinout, IDT71V256SA15PZ8 application, or IDT71V256SA15PZ8 equivalent, key selection criteria include standby current ≤2mA under full CMOS-level standby, tAA ≤15ns read timing, TSOP Type I (PZG28) package compatibility, and dual-mode chip-select control enabling low-power operation in battery-sensitive embedded designs.
Technical Context
The IDT71V256SA15PZ8 implements a fully decoded 15-bit address interface (A0–A14) driving a 262,144-bit memory array organized as 32K words × 8 bits. Its control logic supports three distinct operational modes-active read, active write, and two-tiered standby-governed by independent CS, WE, and OE inputs with TTL/CMOS voltage thresholds.
Power management is hardware-automated: asserting CS high places the device into standby; further raising CS above VHC (VCC – 0.2V) with f = 0 enables full standby mode, guaranteeing ISB1 ≤ 2mA and power dissipation < 6.6mW. All I/Os are bidirectional, LVTTL-compatible, and feature high-impedance tri-state control during deselect or output disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), enabling byte-wide data transfers without external multiplexing |
| Access Time (tAA) | 15ns max - meets timing budgets for 66MHz bus interfaces in desktop and industrial controllers |
| Supply Voltage | 3.3V ±0.3V - compatible with standard 3.3V logic rails and eliminates need for level-shifting circuitry |
| Standby Current (ISB1) | ≤2mA at full CMOS-level standby - extends battery life in portable instrumentation and edge nodes |
| Operating Temperature | –40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures and transportation electronics |
| I/O Compatibility | LVTTL - ensures direct interfacing with Intel Pentium, AMD K6, and FPGA I/O banks without translation |
| Package | 28-pin TSOP Type I (PZG28), 8.1mm × 13.4mm footprint - supports high-density PCB layouts in space-constrained modules |
Pinout & Package
Package: 28-pin TSOP Type I (PZG28), 8.1mm × 13.4mm body, 0.55mm pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit unidirectional address bus accepting 0–32767 row/column select signals |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path supporting simultaneous read/write with automatic direction control via WE/OE |
| CS | Chip Select | Active-low enable controlling full device activation or entry into standby (high = standby) |
| WE | Write Enable | Active-low signal qualifying write cycles; must overlap low CS to initiate data storage |
| OE | Output Enable | Active-low control for output drivers; disables outputs (high-Z) when deasserted during reads |
| VCC | Power Supply | 3.3V core and I/O supply rail - decoupling required within 10mm of pin per Renesas layout guidelines |
| GND | Ground Reference | Primary return path for all internal logic and I/O currents - requires dedicated low-impedance plane |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Standby Mode | Guaranteed ISB1 ≤ 2mA at full CMOS-level standby, reducing system idle power by >90% vs. active operation |
| Dual-Mode Chip Select | CS HIGH enables TTL-level standby (ISB ≤ 20mA); CS > VHC enables ultra-low full standby (ISB1 ≤ 2mA) |
| Fast Read Timing | tAA = 15ns and tOE = 7ns enable reliable operation with 66MHz CPU buses without wait states |
| LVTTL Interface Compliance | VIH = 2.0V min, VIL = 0.8V max, VOH ≥ 2.4V, VOL ≤ 0.4V - ensures noise margin >0.4V in noisy industrial environments |
| Industrial Temperature Support | Qualified from –40°C to +85°C with full AC/DC specs guaranteed - suitable for factory automation and outdoor gateways |
Applications
| Industrial PLC Memory Buffer | Medical Imaging Frame Store |
|---|---|
Use Scenario: Storing real-time I/O status and motion control commands in programmable logic controllers operating in factory-floor cabinets. IC Role / Device Role / Timing Role: Secondary cache SRAM holding firmware instruction buffers and register shadow tables accessed at 66MHz burst rates. Use Value: 15ns tAA and industrial temp rating ensure deterministic response under thermal cycling and EMI exposure common in motor-drive environments. | Use Scenario: Capturing and temporarily buffering uncompressed grayscale image frames (e.g., ultrasound or X-ray previews) before compression and transmission. IC Role / Device Role / Timing Role: High-bandwidth frame buffer providing 8-bit parallel access to 32KB of pixel data per acquisition cycle. Use Value: LVTTL compatibility and 2mA full standby current reduce heat generation and simplify power sequencing in compact diagnostic handhelds. |
| Network Router Packet Buffer | Avionics Display Controller Cache |
Use Scenario: Holding ingress/egress packet headers and metadata in Layer 2/L3 switching ASIC support logic. IC Role / Device Role / Timing Role: Low-latency scratchpad memory servicing header parsing engines with sub-20ns read turnaround. Use Value: tCLZ ≤ 5ns and tOH ≥ 3ns guarantee clean data capture windows for 100Mbps+ Ethernet MAC interfaces. | Use Scenario: Caching font glyphs, UI bitmaps, and overlay metadata in certified cockpit display units requiring DO-254 compliance. IC Role / Device Role / Timing Role: Radiation-tolerant (qualified) SRAM storing critical display assets with zero-refresh, deterministic access. Use Value: Single 3.3V supply and –40°C to +85°C operation eliminate need for voltage translators or thermal derating in sealed avionics enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-45ZSXI | 45ns access time, 5V tolerant I/O, SOIC-28 package | Designed for legacy 5V systems; lacks 3.3V-native LVTTL drive strength and low-ISB1 capability | Select only if migrating from 5V infrastructure where voltage translation is impractical |
| AS6C4008-55ZIN | 55ns access, 3.3V-only, 32K × 8 organization, same PZG28 TSOP package | Higher tAA increases latency in cache-critical paths; lower cost but no industrial temp option | Acceptable for non-real-time buffering where 15ns timing margin is not required |
Compared with IDT71V256SA15PZ8, CY62128EV30LL-45ZSXI trades speed and power efficiency for 5V compatibility, while AS6C4008-55ZIN matches the package and voltage but sacrifices 40ns of timing headroom - making IDT71V256SA15PZ8 optimal for latency-sensitive, thermally demanding embedded caches.
Availability
IDT71V256SA15PZ8 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging subsystems, network packet processing, and avionics display controllers requiring stable component supply across extended product lifecycles.
Supply support for IDT71V256SA15PZ8 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 global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
The IDT71V256SA series was developed as a high-reliability, low-power 3.3V SRAM family targeting secondary cache and buffer applications in performance-critical embedded systems requiring deterministic timing and extended temperature operation.
FAQ
What is the maximum guaranteed access time for IDT71V256SA15PZ8?
The IDT71V256SA15PZ8 has a maximum guaranteed address access time (tAA) of 15ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (3.0V to 3.6V). This value is production-tested and specified in the AC Electrical Characteristics table under the 71V256SA15 speed grade. The IDT71V256SA15PZ8 achieves this timing without requiring external wait-state insertion in 66MHz bus systems.
Does IDT71V256SA15PZ8 support both commercial and industrial temperature grades?
Yes, the IDT71V256SA15PZ8 is specifically qualified for the industrial temperature range of –40°C to +85°C, as confirmed in the Ordering Information table and Absolute Maximum Ratings section. While the base IDT71V256SA family offers commercial-grade variants, the "I" suffix in the orderable part number (e.g., PZGI8) and the datasheet's Grade Table explicitly designate this variant for industrial use with full AC/DC specifications guaranteed across that range.
What package type does IDT71V256SA15PZ8 use, and is it RoHS-compliant?
IDT71V256SA15PZ8 uses the 28-pin TSOP Type I package (PZG28), measuring 8.1mm × 13.4mm with 0.55mm lead pitch. Per the Renesas datasheet revision history and Ordering Information footnote, this part is a "restricted hazardous substance device" and complies with RoHS Directive 2011/65/EU. The "G" in the part number denotes green (halogen-free) construction, and the "8" suffix indicates tape-and-reel packaging.
How does the standby power consumption of IDT71V256SA15PZ8 compare between TTL and CMOS-level chip select?
IDT71V256SA15PZ8 provides two standby modes: TTL-level standby (CS = VIH) draws ≤20mA, while full CMOS-level standby (CS > VHC, f = 0) draws ≤2mA. This 10× reduction enables significant energy savings in battery-backed or thermally constrained systems. The datasheet guarantees ISB1 ≤ 2mA under full standby, with typical power dissipation below 6.6mW - a key differentiator for always-on edge devices using IDT71V256SA15PZ8.
Can IDT71V256SA15PZ8 be used as a drop-in replacement for older 5V SRAMs like the 62256?
No, IDT71V256SA15PZ8 is not a drop-in replacement for 5V SRAMs such as the 62256. It operates exclusively at 3.3V ±0.3V, has LVTTL input thresholds (VIH = 2.0V min), and lacks 5V tolerance on I/O pins. Interfacing with 5V systems would require level-shifting circuitry. The IDT71V256SA15PZ8 is intended for native 3.3V designs - its architecture, timing, and power profile are optimized for that voltage domain, not legacy 5V infrastructure.
IDT71V256SA15PZ8 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
IDT71V256SA15PZ8 FAQ
1.How can I place an order for IDT71V256SA15PZ8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA15PZ8 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 IDT71V256SA15PZ8 reliable?
The price and inventory of IDT71V256SA15PZ8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA15PZ8 is usually 5 days.
3.What payment methods are accepted for IDT71V256SA15PZ8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA15PZ8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA15PZ8?
IDT71V256SA15PZ8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA15PZ8 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 IDT71V256SA15PZ8?
For technical support, including IDT71V256SA15PZ8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA15PZ8 requirements.
6.How does Aetrix verify that IDT71V256SA15PZ8 is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA15PZ8 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 IDT71V256SA15PZ8 meets industry standards.
7.What is the process for return or replacement of IDT71V256SA15PZ8?
All IDT71V256SA15PZ8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA15PZ8, 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 IDT71V256SA15PZ8 part is unused and in its original packaging.
Return procedure for IDT71V256SA15PZ8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA15PZ8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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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
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AT24CS02-SSHM-T
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AT24C04C-SSHM-T
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Microchip Technology
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