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Renesas IDT71V256SA20PZ
- Part No.:
- IDT71V256SA20PZ
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA20PZ.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,153
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Product details
Overview
IDT71V256SA20PZ 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 with 2mA full-standby current.
For engineers reviewing the IDT71V256SA20PZ datasheet, IDT71V256SA20PZ pinout, IDT71V256SA20PZ application, or IDT71V256SA20PZ equivalent, this SRAM is selected for low-power, high-reliability embedded memory subsystems requiring fast random-access timing, TTL-level interface compatibility, and stable operation across extended temperature environments.
Technical Context
The IDT71V256SA20PZ implements asynchronous SRAM architecture with independent chip select (CS), output enable (OE), and write enable (WE) control lines enabling flexible bus interfacing. Its address decoding supports 15-bit addressing (A0–A14) for 32K words, and bidirectional I/O0–I/O7 pins provide byte-wide data transfer without external transceivers.
Power management is implemented via CS-driven standby: CS = VIH places the device in TTL-level standby (ISB ≤ 20mA), while CS > VHC and f = 0 enables full CMOS-level standby (ISB1 ≤ 2mA). All DC and AC parameters are guaranteed over the full industrial temperature range at VCC = 3.3V ±0.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256Kbit (32K × 8-bit) - supports full byte-wide data bus without multiplexing or external latch logic |
| Access Time | 20ns - meets timing requirements for 50MHz CPU secondary cache interfaces |
| Supply Voltage | 3.3V ±0.3V - compatible with standard 3.3V logic families and eliminates need for voltage translation |
| Standby Current | ≤2mA (full standby) - extends battery life in portable or power-constrained embedded systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade reliability in harsh environmental conditions |
| I/O Compatibility | LVTTL - ensures direct interoperability with 3.3V microprocessors, FPGAs, and ASICs |
| Package | 28-pin TSOP Type I (PZG28) - surface-mount footprint optimized for high-density PCB layouts |
Pinout & Package
The IDT71V256SA20PZ is housed in a 28-pin TSOP Type I package (PZG28), 10.16mm × 11.43mm body size, 0.5mm lead pitch, JEDEC MO-141 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting 32K-word addressing; no internal latching required |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; tri-state controlled by CS/OE/WE to prevent bus contention |
| CS | Chip Select | Active-low global enable; drives device into low-power standby when HIGH |
| WE | Write Enable | Active-low control for write cycles; must overlap LOW CS to initiate valid write |
| OE | Output Enable | Active-low control for read output drivers; allows shared bus operation with other peripherals |
| VCC | Power Supply | 3.3V core and I/O supply; decoupling required within 10mm of pin per layout guidelines |
| GND | Ground Reference | Common return for all signals and power; requires low-inductance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| 20ns Access with Full Industrial Temp Support | Guaranteed tAA ≤ 20ns across –40°C to +85°C, enabling reliable cache operation in ruggedized systems |
| 2mA Full Standby Current | Enables >10-year battery-backed operation in always-on monitoring or logging applications |
| LVTTL-Compatible I/O | Eliminates level-shifting circuitry when interfacing with 3.3V processors, reducing BOM count and board area |
| CS-Controlled Power Management | Automatic transition to ultra-low-power mode on CS deassertion-no software or external logic needed |
| TSOP Type I Packaging | Enables automated SMT assembly and thermal performance suitable for convection-cooled industrial enclosures |
Applications
| Industrial PLC Memory Buffer | Medical Imaging Data Cache |
|---|---|
Use Scenario: Real-time I/O scanning and program execution in programmable logic controllers requiring deterministic memory access. IC Role / Device Role / Timing Role: Secondary cache for instruction/data buffering between ARM Cortex-M7 MCU and fieldbus interface ASIC. Use Value: 20ns access time ensures sub-microsecond response to interrupt-driven I/O events under full industrial temperature stress. | Use Scenario: Temporary storage of digitized X-ray or ultrasound frames during preprocessing before DRAM transfer. IC Role / Device Role / Timing Role: High-reliability, low-latency frame buffer interfaced directly to FPGA-based image pipeline. Use Value: LVTTL compatibility and 2mA standby current reduce FPGA I/O bank loading and extend battery runtime in portable diagnostic units. |
| Ruggedized Network Router Packet Buffer | Avionics Sensor Data Logger |
Use Scenario: Storing packet headers and metadata in edge routers deployed in uncontrolled telecom cabinets. IC Role / Device Role / Timing Role: Low-power SRAM for packet classification engine with burst-mode read/write capability. Use Value: Guaranteed operation at –40°C to +85°C and 28-pin TSOP footprint support compact, fanless router designs. | Use Scenario: Capturing high-frequency vibration or pressure sensor streams in flight test instrumentation. IC Role / Device Role / Timing Role: Nonvolatile-buffered memory stage prior to EEPROM or flash write, minimizing wear on long-term storage. Use Value: Full standby mode (2mA) preserves backup battery charge during extended pre-flight idle periods. |
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 28-pin TSOP | Designed for legacy 5V systems; lacks 3.3V-only optimization and low-standby current | Select only if migrating from 5V infrastructure or requiring backward voltage compatibility |
| AS6C4008-20TIN | 20ns access; 3.3V supply; 512K × 8 capacity; 32-pin TSOP II package | Higher density but larger footprint and higher standby current (5mA) | Choose when memory expansion beyond 256K is required and board space permits larger package |
Compared with CY62128EV30LL-45ZSXI and AS6C4008-20TIN, the IDT71V256SA20PZ offers optimal balance of speed, power efficiency, and industrial temperature compliance in a compact 28-pin TSOP, making it preferred for new 3.3V embedded designs where footprint and standby current are constrained.
Availability
IDT71V256SA20PZ is available at Aetrix Electronics and suitable for industrial PLC memory buffers, medical imaging data caches, and ruggedized network router packet buffers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for IDT71V256SA20PZ 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 IoT applications.
The IDT71V256SA20PZ belongs to Renesas' legacy high-speed CMOS SRAM product line, engineered specifically for low-latency, low-power memory subsystems in 3.3V processor-based industrial and embedded platforms.
FAQ
What is the guaranteed operating temperature range for the IDT71V256SA20PZ?
The IDT71V256SA20PZ is fully specified and guaranteed for industrial operation from –40°C to +85°C. All AC and DC electrical characteristics-including 20ns access time, 2mA full-standby current, and LVTTL I/O thresholds-are validated across this full range at VCC = 3.3V ±0.3V. This makes the IDT71V256SA20PZ suitable for deployment in demanding environments such as factory automation, outdoor networking, and transportation control systems where ambient temperatures fluctuate widely.
Does the IDT71V256SA20PZ support true static operation without refresh?
Yes, the IDT71V256SA20PZ is a true asynchronous static RAM with no refresh requirement. Its CMOS-based memory array retains data indefinitely as long as VCC remains within specification and CS is held HIGH in standby mode. Unlike DRAM, the IDT71V256SA20PZ does not require external refresh circuitry, simplifying system design and eliminating timing-critical refresh overhead in real-time applications.
How does the standby power management work on the IDT71V256SA20PZ?
The IDT71V256SA20PZ implements dual-level standby: TTL-level standby (ISB ≤ 20mA) activates when CS = VIH, and full CMOS-level standby (ISB1 ≤ 2mA) engages when CS > VHC with zero input toggling (f = 0). This two-tier approach allows system designers to optimize power savings based on activity patterns-e.g., using ISB1 during deep sleep modes and ISB during brief inter-burst idle intervals-without modifying hardware or firmware for the IDT71V256SA20PZ.
Is the IDT71V256SA20PZ pin-compatible with earlier speed grades like IDT71V256SA15PZ?
Yes, the IDT71V256SA20PZ shares identical pinout, package (28-pin TSOP Type I, PZG28), and functional interface with IDT71V256SA12PZ and IDT71V256SA15PZ. All variants use the same A0–A14, I/O0–I/O7, CS, WE, OE, VCC, and GND assignments. This allows drop-in replacement for timing margining or cost optimization-though system timing must be revalidated to ensure setup/hold margins remain sufficient at the slower 20ns grade.
What package type and mounting configuration does the IDT71V256SA20PZ use?
The IDT71V256SA20PZ is supplied in a 28-pin TSOP Type I (PZG28) package, measuring 10.16mm × 11.43mm with 0.5mm lead pitch and gull-wing leads. It is designed for surface-mount reflow assembly per IPC/JEDEC J-STD-020, and its low-profile form factor supports high-density routing in space-constrained industrial PCBs. The IDT71V256SA20PZ is not offered in SOJ or DIP variants under this specific orderable part number.
IDT71V256SA20PZ 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:
- 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
IDT71V256SA20PZ FAQ
1.How can I place an order for IDT71V256SA20PZ through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA20PZ 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 IDT71V256SA20PZ reliable?
The price and inventory of IDT71V256SA20PZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA20PZ is usually 5 days.
3.What payment methods are accepted for IDT71V256SA20PZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA20PZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA20PZ?
IDT71V256SA20PZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA20PZ 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 IDT71V256SA20PZ?
For technical support, including IDT71V256SA20PZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA20PZ requirements.
6.How does Aetrix verify that IDT71V256SA20PZ is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA20PZ 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 IDT71V256SA20PZ meets industry standards.
7.What is the process for return or replacement of IDT71V256SA20PZ?
All IDT71V256SA20PZ units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA20PZ, 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 IDT71V256SA20PZ part is unused and in its original packaging.
Return procedure for IDT71V256SA20PZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA20PZ 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
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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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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