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Renesas IDT71V256SA12PZI
- Part No.:
- IDT71V256SA12PZI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA12PZI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,812
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Product details
Overview
IDT71V256SA12PZI from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM designed for secondary cache in 3.3V processor systems. It features 12ns access time, industrial temperature range (–40°C to +85°C), single 3.3V ±0.3V supply, LVTTL-compatible I/O, and 2mA full-standby current. Used in embedded computing and industrial control where low-power, fast-access SRAM is required.
For engineers reviewing the IDT71V256SA12PZI datasheet, IDT71V256SA12PZI pinout, IDT71V256SA12PZI application, or IDT71V256SA12PZI equivalent, key selection criteria include access timing under CS/OE control, standby power at CMOS-level chip select, TSOP-28 package compatibility, and industrial-grade reliability for mission-critical memory subsystems.
Technical Context
The IDT71V256SA12PZI implements asynchronous SRAM architecture with independent address decoding and bidirectional data I/O lines. Its control logic supports three operating modes: active read/write (CS=L, WE=L or OE=L), output disable (CS=L, OE=H), and two standby states-TTL-level standby (CS=H, ISB ≤20mA) and full CMOS-level standby (CS > VHC, ISB1 ≤2mA).
Timing is governed by overlapping CS and WE signals for write cycles, and CS/OE coordination for read cycles. The device guarantees tAA ≤12ns, tRC =12ns, and tWHZ ≤8ns under industrial conditions (VCC = 3.3V ±0.3V, TA = –40°C to +85°C), with all AC parameters validated using standard 350Ω/5pF test loads per JEDEC JESD-8A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), byte-wide parallel interface |
| Access Time (tAA) | ≤12ns - enables direct integration into 83 MHz CPU bus cycles without wait states |
| Supply Voltage | 3.3V ±0.3V - compatible with modern low-voltage logic families and eliminates level-shifting |
| Standby Current (ISB1) | ≤2mA at full CMOS standby - extends battery life in portable industrial controllers |
| Operating Temperature | –40°C to +85°C - qualified for harsh environments including factory automation and transportation systems |
| I/O Compatibility | LVTTL - ensures interoperability with 3.3V microprocessors, FPGAs, and ASICs without external buffers |
| Package | 28-pin TSOP Type I (PZG28), 8.1mm × 13.4mm footprint - supports high-density PCB layouts |
Pinout & Package
Package: 28-pin TSOP Type I (PZG28), 8.1 mm × 13.4 mm body, 0.55 mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting 32K-word addressing; TTL/LVTTL-compatible thresholds |
| I/O0–I/O7 | Bidirectional Data Lines | 8-bit parallel data path; high-impedance when CS=H or OE=H during reads/writes |
| CS | Chip Select | Active-low enable; drives device into low-power standby when HIGH (CMOS or TTL level) |
| WE | Write Enable | Active-low control for write operations; must overlap with CS=L to initiate write cycle |
| OE | Output Enable | Active-low control for read data output; allows output disable while CS=L to prevent bus contention |
| VCC | Power Supply | +3.3V ±0.3V main supply; decoupling required within 10 mm of pin |
| GND | Ground Reference | Signal and power ground return; requires low-inductance connection to plane |
Key Features
| Feature | Design Value |
|---|---|
| 12ns Fast Access Time | Meets timing requirements of 3.3V Pentium-class processors and FPGA-based controllers without wait-state insertion |
| 2mA Full Standby Current | Reduces system-level quiescent power by >90% vs. active mode, critical for battery-backed industrial modules |
| Industrial Temperature Range | Validated operation from –40°C to +85°C ensures reliability in uncontrolled enclosures and outdoor equipment |
| LVTTL-Compatible I/O | Eliminates need for voltage translators when interfacing with 3.3V SoCs, microcontrollers, and programmable logic |
| Green (Pb-Free) Construction | Complies with RoHS Directive 2011/65/EU and Renesas green material standards for sustainable manufacturing |
Applications
| Industrial PLC Memory Buffer | Medical Imaging Data Cache |
|---|---|
Use Scenario: Real-time buffering of sensor acquisition data in programmable logic controller I/O modules. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state storage for cyclic process data exchange between CPU and fieldbus interface. Use Value: 12ns tAA and industrial temp rating ensure deterministic response under thermal stress and EMI-rich factory floors. | Use Scenario: Temporary frame storage in portable ultrasound or X-ray imaging subsystems with battery backup. IC Role / Device Role / Timing Role: High-reliability, low-power memory holding digitized image segments during ADC-to-processor transfer. Use Value: 2mA ISB1 enables >72-hour battery hold-up time while preserving volatile frame data during power interruption. |
| Ruggedized Network Router Buffer | Avionics Data Logger |
Use Scenario: Packet buffering in fanless, conduction-cooled enterprise routers deployed in telecom cabinets. IC Role / Device Role / Timing Role: Secondary cache for packet classification engines requiring fast random-access latency and thermal resilience. Use Value: TSOP-28 package and –40°C to +85°C operation support extended lifetime in sealed, high-ambient-temperature enclosures. | Use Scenario: Non-volatile event logging in flight data recorders where SRAM retains critical telemetry during power loss. IC Role / Device Role / Timing Role: Battery-backed memory storing timestamped sensor readings prior to EEPROM dump on power-up. Use Value: Low ISB1 minimizes battery drain over months of standby, while LVTTL I/O simplifies interface to radiation-tolerant microcontrollers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62128EV30LL-45ZSXI | 45ns access time, 5V-tolerant I/O, 32K × 8 organization, same TSOP-28 package | Designed for legacy 5V systems; lacks 3.3V-native LVTTL compatibility and industrial-grade 12ns speed | Select only if migrating from older 5V designs with no voltage scaling constraints |
| AS6C4008-12BIN | 12ns access, 3.3V supply, 512K × 8 organization, 32-pin SOP package | Doubles memory density but requires PCB redesign due to larger footprint and different pinout | Choose when higher capacity is needed and board layout can accommodate 32-pin SOP |
Compared with CY62128EV30LL-45ZSXI and AS6C4008-12BIN, the IDT71V256SA12PZI uniquely balances industrial-grade 12ns performance, LVTTL compatibility, and minimal 28-pin TSOP footprint-making it optimal for space-constrained, thermally demanding 3.3V embedded systems requiring proven reliability.
Availability
IDT71V256SA12PZI is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging subsystems, ruggedized network infrastructure, and avionics data loggers requiring stable component supply across extended product lifecycles.
Supply support for IDT71V256SA12PZI 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 applications.
The IDT71V256SA12PZI belongs to Renesas' legacy high-speed SRAM product line, originally developed by IDT and optimized for low-latency, low-power memory subsystems in real-time industrial and communications equipment.
FAQ
What is the maximum guaranteed access time for IDT71V256SA12PZI under industrial conditions?
The IDT71V256SA12PZI has a maximum guaranteed address access time (tAA) of 12ns at VCC = 3.3V ±0.3V and TA = –40°C to +85°C. This value is production-tested and specified in the AC Electrical Characteristics table of the Renesas datasheet (Rev. Jun.02.20). The IDT71V256SA12PZI achieves this timing without wait states in synchronous bus interfaces up to 83 MHz.
Does IDT71V256SA12PZI support true CMOS-level standby, and what is the current draw?
Yes, the IDT71V256SA12PZI supports full CMOS-level standby when CS exceeds VHC (VCC – 0.2V), guaranteeing ISB1 ≤2mA at VCC max and f = 0. This mode is distinct from TTL-level standby (ISB ≤20mA) and is essential for ultra-low-power retention in battery-backed systems. The IDT71V256SA12PZI datasheet confirms this behavior in both DC and AC tables.
Which package type does IDT71V256SA12PZI use, and is it RoHS-compliant?
IDT71V256SA12PZI uses the 28-pin TSOP Type I package (PZG28), measuring 8.1 mm × 13.4 mm with 0.55 mm pitch. Per Renesas ordering information and datasheet footnote, it is a green (lead-free) part compliant with RoHS Directive 2011/65/EU. The IDT71V256SA12PZI carries the "G" suffix in its orderable code to denote Pb-free construction.
Can IDT71V256SA12PZI operate with 5V-tolerant inputs?
No, the IDT71V256SA12PZI is not 5V-tolerant. Its absolute maximum input voltage is VCC + 0.5V (≤3.85V at VCC = 3.3V), and VIH is specified as 2.0V to VCC + 0.3V. Driving inputs above 3.85V risks permanent damage. Interface with 5V logic requires level translation. The IDT71V256SA12PZI is strictly a 3.3V LVTTL device.
What is the pin configuration difference between IDT71V256SA12PZI and the SOJ-packaged variant IDT71V256SA12YGI?
IDT71V256SA12PZI (TSOP-28) and IDT71V256SA12YGI (SOJ-28) share identical signal pin functions and ordering (A0–A14, I/O0–I/O7, CS, WE, OE, VCC, GND), but differ physically: PZG28 places A10 adjacent to CS, while PJG28 places A10 adjacent to A9. Pin 1 location and mechanical dimensions differ-TSOP has gull-wing leads; SOJ has J-bend. The IDT71V256SA12PZI cannot be substituted for YGI without PCB redesign.
IDT71V256SA12PZI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tube
- 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:
- 12ns
- Access Time:
- 12 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
IDT71V256SA12PZI FAQ
1.How can I place an order for IDT71V256SA12PZI through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA12PZI 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 IDT71V256SA12PZI reliable?
The price and inventory of IDT71V256SA12PZI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA12PZI is usually 5 days.
3.What payment methods are accepted for IDT71V256SA12PZI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA12PZI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA12PZI?
IDT71V256SA12PZI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA12PZI 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 IDT71V256SA12PZI?
For technical support, including IDT71V256SA12PZI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA12PZI requirements.
6.How does Aetrix verify that IDT71V256SA12PZI is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA12PZI 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 IDT71V256SA12PZI meets industry standards.
7.What is the process for return or replacement of IDT71V256SA12PZI?
All IDT71V256SA12PZI units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA12PZI, 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 IDT71V256SA12PZI part is unused and in its original packaging.
Return procedure for IDT71V256SA12PZI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA12PZI Tags
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M24C02-WMN6TP
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