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Renesas IDT71V256SA20PZ8
- Part No.:
- IDT71V256SA20PZ8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA20PZ8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
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Product details
Overview
IDT71V256SA20PZ8 from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM designed for secondary cache in 3.3V processor systems. It operates at 3.3V ±0.3V, delivers 20ns access time, 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 IDT71V256SA20PZ8 datasheet, IDT71V256SA20PZ8 pinout, IDT71V256SA20PZ8 application, or IDT71V256SA20PZ8 equivalent, key selection criteria include standby current ≤2mA, full standby power <6.6mW, TSOP Type I (PZG28) package compatibility, and dual-mode chip-select control enabling low-power operation in battery-sensitive embedded designs.
Technical Context
The IDT71V256SA20PZ8 implements a synchronous, single-supply SRAM architecture with TTL-compatible address/data/control interfaces. Its memory array uses advanced high-reliability CMOS process technology, supporting both CS-controlled and WE-controlled read/write cycles with defined timing margins for tAA (20ns), tRC (20ns), and tWC (20ns).
Power management is implemented via two standby modes: TTL-level standby (ISB ≤20mA) when CS = VIH, and full CMOS-level standby (ISB1 ≤2mA) when CS > VHC and f = 0. The device guarantees output high-impedance states during standby and write transitions, with tCHZ ≤10ns and tWHZ ≤10ns ensuring clean bus release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256Kbit (32K × 8-bit) - provides byte-wide data path compatible with x86 and RISC processor secondary cache buses. |
| Access Time | 20ns - enables support for up to 50MHz system clock domains without wait states in cache subsystems. |
| Supply Voltage | 3.3V ±0.3V - matches standard 3.3V logic rails and eliminates need for level-shifting in modern motherboard designs. |
| Standby Current | ≤2mA (ISB1) - extends battery life in portable industrial controllers and low-power edge nodes during idle periods. |
| Operating Temp | –40°C to +85°C - qualified for use in uncontrolled industrial environments including factory automation and transportation electronics. |
| I/O Compatibility | LVTTL - ensures direct interface with Intel Pentium-class and ARM9/ARM11 processors without external translators. |
| Package | 28-pin TSOP Type I (PZG28) - 10.16mm × 11.43mm footprint optimized for high-density PCB layouts in space-constrained modules. |
Pinout & Package
Package: 28-pin TSOP Type I (PZG28), 10.16mm × 11.43mm body, 0.5mm lead pitch, JEDEC MO-141 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 32K unique locations; driven by CPU address lines with setup/hold timing per tAS/tAH. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path supporting read/write transfers; high-impedance during CS HIGH or OE HIGH. |
| CS | Chip Select | Active-low enable controlling entry into standby mode; drives ISB1 ≤2mA when held >VHC (≥3.1V) at VCC=3.6V. |
| WE | Write Enable | Active-low signal initiating write cycle; must overlap CS LOW to latch data; controls tWP ≥15ns minimum pulse width. |
| OE | Output Enable | Active-low control for output drivers; determines tOE ≤8ns access delay and tOHZ ≤8ns high-Z transition timing. |
| VCC | Power Supply | 3.3V ±0.3V primary supply; decoupling required within 10mm of pin per layout guidelines to maintain tAA stability. |
| GND | Ground Reference | Signal and power return plane; requires low-inductance connection to minimize noise coupling into sensitive I/O paths. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Standby Mode | Full standby current ≤2mA at VCC=3.6V ensures <6.6mW total power consumption - critical for fanless industrial gateways. |
| Dual-Mode Chip Select | Supports both TTL-level (ISB ≤20mA) and CMOS-level (ISB1 ≤2mA) standby activation - simplifies power sequencing in multi-voltage systems. |
| Fast Output Disable | tOHZ ≤8ns and tCHZ ≤10ns guarantee rapid bus release during mode transitions - prevents data contention in shared-memory architectures. |
| LVTTL Interface Compliance | VIH ≥2.0V and VIL ≤0.8V ensure robust noise margin against 3.3V logic families - eliminates need for external bus buffers in legacy PC designs. |
| Industrial Temperature Qualification | Validated operation from –40°C to +85°C across all AC/DC parameters - meets EN 50155 requirements for rail transport electronics. |
Applications
| Industrial PLC Cache Memory | Medical Imaging Buffer |
|---|---|
Use Scenario: Real-time motion control logic in programmable logic controllers requires deterministic memory access for servo loop execution. IC Role / Device Role / Timing Role: Secondary cache SRAM providing 20ns read latency to reduce CPU stall cycles during I/O scan processing. Use Value: Enables sub-100µs control loop response with guaranteed tAA ≤20ns and industrial-grade thermal stability. | Use Scenario: Temporary frame storage in portable ultrasound devices where power budget limits active memory usage. IC Role / Device Role / Timing Role: Low-power buffer holding digitized echo data prior to DSP compression and transmission. Use Value: ISB1 ≤2mA standby current extends battery runtime between scans while maintaining full 32K×8 capacity. |
| Ruggedized Network Router | Avionics Data Logger |
Use Scenario: Packet buffering in fanless enterprise routers deployed in harsh telecom cabinets with ambient temperatures up to +75°C. IC Role / Device Role / Timing Role: High-reliability SRAM backing packet forwarding tables with zero refresh overhead. Use Value: Qualified operation at +85°C ambient ensures uninterrupted throughput under sustained thermal load without derating. | Use Scenario: Non-volatile flight data recording in commercial aircraft black boxes requiring extended operational life without maintenance. IC Role / Device Role / Timing Role: Write-critical buffer capturing sensor telemetry during takeoff/landing phases before EEPROM backup. Use Value: tWP ≥15ns and tDW ≥8ns guarantee reliable data capture even during high-G vibration events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62256ELL-70SNXI | 512K (64K × 8) capacity, 70ns access, 5V supply - larger size but slower and incompatible voltage. | Legacy 5V systems only; not suitable for 3.3V designs without level translation. | Select only if upgrading from older 5V platforms and board redesign is impractical. |
| AS6C4008-20TIN | 4Mbit (512K × 8), 20ns access, 3.3V supply, TSOP-28 - same speed and voltage but higher density. | Systems requiring >256K cache or future-proofing for memory expansion. | Choose when additional capacity is needed without changing PCB layout or power architecture. |
Compared with IDT71V256SA20PZ8, CY62256ELL-70SNXI requires voltage translation and offers lower performance, while AS6C4008-20TIN provides identical timing and voltage compatibility with 16× greater capacity - making it a forward-compatible upgrade path for new designs.
Availability
IDT71V256SA20PZ8 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging buffers, ruggedized network routers, and avionics data loggers requiring stable component supply across extended product lifecycles.
Supply support for IDT71V256SA20PZ8 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 specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.
IDT71V256SA20PZ8 belongs to Renesas' legacy high-speed SRAM product line, engineered specifically for low-latency, low-power cache and buffer applications in 3.3V embedded systems.
FAQ
What is the maximum operating temperature specification for IDT71V256SA20PZ8?
IDT71V256SA20PZ8 is rated for industrial temperature operation from –40°C to +85°C. All AC and DC electrical characteristics, including tAA ≤20ns and ISB1 ≤2mA, are guaranteed across this full range. This qualification makes IDT71V256SA20PZ8 suitable for deployment in uncontrolled environments such as factory floors, outdoor telecom cabinets, and vehicle-mounted control units without thermal derating.
Does IDT71V256SA20PZ8 require external refresh circuitry?
No, IDT71V256SA20PZ8 is a static RAM and does not require refresh circuitry. Its CMOS-based memory cells retain data indefinitely as long as VCC remains within 3.0V–3.6V and ambient temperature stays within –40°C to +85°C. This eliminates timing-critical refresh overhead, simplifying system design for real-time applications like motion control and packet forwarding where deterministic latency is essential.
What is the meaning of the '8' suffix in IDT71V256SA20PZ8?
The '8' suffix in IDT71V256SA20PZ8 indicates tape-and-reel packaging - specifically, 1,000-unit reels per standard JEDEC carrier. This format supports automated SMT placement in high-volume manufacturing. The base part IDT71V256SA20PZG denotes the same TSOP-28 device in tube packaging, while PZ8 confirms reel delivery optimized for pick-and-place efficiency and inventory traceability.
Can IDT71V256SA20PZ8 be used with 5V-tolerant microcontrollers?
IDT71V256SA20PZ8 has LVTTL-compatible inputs (VIH ≥2.0V, VIL ≤0.8V) but is not 5V-tolerant. Its absolute maximum input voltage is VCC + 0.5V = 4.1V. Direct connection to 5V logic outputs risks damage or parametric failure. Interface requires level-shifting or series resistors if paired with 5V microcontrollers; it is natively compatible with 3.3V CPUs such as ARM926EJ-S, ColdFire MCF5225x, and Intel Atom E6xx series.
How does the standby power consumption of IDT71V256SA20PZ8 compare between CS HIGH and CS > VHC conditions?
IDT71V256SA20PZ8 offers two distinct standby modes: when CS = VIH (≥2.0V), ISB ≤20mA; when CS > VHC (≥3.1V at VCC = 3.6V), ISB1 ≤2mA. The latter condition achieves >90% power reduction and is mandatory for ultra-low-power applications. Designers must ensure the driving logic meets VHC threshold to activate full standby - a common oversight in FPGA-based control implementations where output swing may fall short of VHC.
IDT71V256SA20PZ8 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:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
IDT71V256SA20PZ8 FAQ
1.How can I place an order for IDT71V256SA20PZ8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA20PZ8 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 IDT71V256SA20PZ8 reliable?
The price and inventory of IDT71V256SA20PZ8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA20PZ8 is usually 5 days.
3.What payment methods are accepted for IDT71V256SA20PZ8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA20PZ8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA20PZ8?
IDT71V256SA20PZ8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA20PZ8 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 IDT71V256SA20PZ8?
For technical support, including IDT71V256SA20PZ8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA20PZ8 requirements.
6.How does Aetrix verify that IDT71V256SA20PZ8 is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA20PZ8 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 IDT71V256SA20PZ8 meets industry standards.
7.What is the process for return or replacement of IDT71V256SA20PZ8?
All IDT71V256SA20PZ8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA20PZ8, 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 IDT71V256SA20PZ8 part is unused and in its original packaging.
Return procedure for IDT71V256SA20PZ8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA20PZ8 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
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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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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