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Renesas 71V256SA20PZG
- Part No.:
- 71V256SA20PZG
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
71V256SA20PZG.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,190
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Product details
Overview
71V256SA20PZG 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 2mA full-standby current in TSOP Type I package.
For engineers reviewing the 71V256SA20PZG datasheet, 71V256SA20PZG pinout, 71V256SA20PZG application, or 71V256SA20PZG equivalent, key selection criteria include TTL-compatible I/O, low-power standby mode activation via CS, AC timing compliance for read/write cycles, and compatibility with space-constrained 28-pin TSOP layouts in embedded computing and industrial control designs.
Technical Context
The 71V256SA20PZG implements asynchronous SRAM architecture with independent chip select (CS), output enable (OE), and write enable (WE) controls. Its address decoding supports 15-bit addressing (A0–A14) for 32K words, and bidirectional I/O0–I/O7 lines operate at LVTTL voltage levels with guaranteed VOH ≥2.4V and VOL ≤0.4V under load.
Power management relies on dual standby modes: TTL-level CS HIGH yields ISB ≤20mA, while CMOS-level CS HIGH with f = 0 guarantees ISB1 ≤2mA and power dissipation <6.6mW. Timing is defined by tRC = 20ns, tAA = 20ns, and tWC = 20ns, with tCLZ = 5ns and tCHZ = 10ns ensuring fast bus turnaround.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256Kbit (32K × 8-bit) - supports byte-wide data paths without external multiplexing |
| Access Time | 20ns - enables compatibility with 50MHz bus clocks in secondary cache applications |
| Supply Voltage | 3.3V ±0.3V - matches modern low-voltage processor I/O domains and eliminates level-shifting |
| Standby Current | 2mA max (full standby) - extends battery life in portable or always-on industrial controllers |
| Operating Temp | –40°C to +85°C - qualified for deployment in uncontrolled industrial environments |
| I/O Compatibility | LVTTL - ensures direct interface with 3.3V microprocessors and FPGAs without translation logic |
| Package | 28-pin TSOP Type I (PZG28) - 0.5mm pitch, 18.4mm × 8.2mm footprint for high-density PCB layouts |
Pinout & Package
71V256SA20PZG is housed in a 28-pin TSOP Type I (PZG28) package with 0.5mm lead pitch and JEDEC-standard pinout. The package supports automated assembly and provides thermal performance suitable for sustained operation in enclosed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 0–32767 word locations; CMOS-compatible inputs with VIH ≥2.0V |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; tri-stated when CS or OE inactive; drives LVTTL loads up to 8mA |
| CS | Chip Select | Active-low enable; asserts memory access when LOW; forces full standby when HIGH at CMOS level |
| WE | Write Enable | Active-low control for write cycles; overlaps with CS LOW to initiate data storage into addressed location |
| OE | Output Enable | Active-low control for read output drivers; allows shared bus operation with other peripherals |
| VCC | Power Supply | +3.3V supply input; requires local 0.1µF decoupling per device to maintain signal integrity |
| GND | Ground Reference | Signal and power return; must be connected to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Standby Mode | 2mA max ISB1 current with CS at CMOS HIGH and zero input toggling - reduces system idle power in battery-backed controllers |
| Fast Read/Write Timing | tRC = tWC = 20ns with tCLZ = 5ns and tCHZ = 10ns - minimizes bus contention and supports burst-mode CPU caching |
| LVTTL-Compatible I/O | VOH ≥2.4V at –4mA and VOL ≤0.4V at 8mA - ensures noise margin >0.4V in noisy industrial backplanes |
| Industrial Temperature Range | –40°C to +85°C operation - validated for use in motor drives, PLCs, and outdoor telecom equipment |
| Green Packaging Option | Halogen-free, RoHS-compliant TSOP construction - meets environmental compliance requirements for global OEM shipments |
Applications
| Industrial PLC Memory Buffer | Embedded Network Router 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 SRAM holding firmware instruction buffers and tag RAM for fast context switching. Use Value: 20ns access time ensures sub-microsecond response to ladder logic scan cycles, while industrial temp rating sustains reliability across factory floor thermal swings. | Use Scenario: Packet buffering and forwarding table storage in compact edge routers with space-constrained PCBs. IC Role / Device Role / Timing Role: High-speed data buffer interfacing directly with MIPS-based network processors via 8-bit parallel bus. Use Value: TSOP package enables dense memory placement near CPU; LVTTL compatibility eliminates level shifters, reducing BOM count and signal path delay. |
| Medical Imaging Control Board | Ruggedized Handheld Terminal |
Use Scenario: Storing real-time sensor calibration tables and image pre-processing lookup data in portable diagnostic devices. IC Role / Device Role / Timing Role: Non-volatile configuration memory supplementing flash, accessed during boot and runtime calibration routines. Use Value: 2mA standby current extends battery life between charges; –40°C to +85°C rating supports operation in refrigerated or sun-exposed clinical environments. | Use Scenario: Barcode scanner and RFID reader firmware cache in handheld terminals deployed in warehouse logistics. IC Role / Device Role / Timing Role: Fast-access working memory for decode engines and communication protocol stacks running on ARM Cortex-M cores. Use Value: Tri-state I/O and OE control allow shared bus arbitration with display drivers and wireless modules; green TSOP meets EU WEEE compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-20TIN | 256K × 8-bit, 20ns, 3.3V, 28-pin TSOP, but uses different pinout (A10/A11 swapped) and higher ISB1 (5mA) | Requires PCB layout revision due to non-identical pin mapping; less suitable for drop-in replacement in existing 71V256SA20PZG designs | Select only if redesigning layout and prioritizing alternate supplier availability over pin compatibility |
| IS61LV25616AL-20TQLI | 512K × 16-bit, 20ns, 3.3V, 44-pin TSOP; wider data bus and double capacity but incompatible pinout and voltage tolerance (3.3V only, no 5V-tolerant I/O) | Not pin-compatible; requires bus-width adaptation and additional address decoding logic | Choose when upgrading memory bandwidth and capacity is acceptable, and board redesign is planned |
Compared with AS6C4008-20TIN and IS61LV25616AL-20TQLI, the 71V256SA20PZG offers verified pinout alignment with legacy IDT/Renesas designs, lower standby current, and seamless integration into existing 8-bit cache architectures without hardware modification.
Availability
71V256SA20PZG is available at Aetrix Electronics and suitable for industrial PLCs, embedded network routers, medical imaging control boards, and ruggedized handheld terminals requiring stable component supply across extended product lifecycles.
Supply support for 71V256SA20PZG 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 71V256SA series was developed as a high-reliability, low-power 3.3V SRAM family targeting secondary cache and buffer memory in space- and power-constrained embedded systems.
FAQ
What is the operating voltage range for the 71V256SA20PZG?
The 71V256SA20PZG operates within a supply voltage range of 3.0V to 3.6V, with nominal VCC at 3.3V ±0.3V. This tight tolerance ensures compatibility with modern 3.3V logic families and eliminates the need for external regulators in most embedded designs. All DC and AC specifications for the 71V256SA20PZG are guaranteed across this range under industrial temperature conditions.
Does the 71V256SA20PZG support industrial temperature operation?
Yes, the 71V256SA20PZG is fully specified for industrial temperature operation from –40°C to +85°C. This rating is confirmed in the ordering information and electrical characteristics tables, where parameters like tAA, ISB1, and VOH are guaranteed across the full range. The 71V256SA20PZG is marked with "I" grade suffix in Renesas documentation, validating its suitability for harsh-environment applications.
How does the standby power mode work on the 71V256SA20PZG?
The 71V256SA20PZG enters low-power standby when CS is driven HIGH. In full standby (CS > VHC, f = 0), it draws ≤2mA and dissipates <6.6mW. This mode preserves data indefinitely without refresh and is activated automatically-no command sequence or register write is required. The 71V256SA20PZG resumes normal operation within tCHZ ≤10ns after CS returns LOW.
Is the 71V256SA20PZG pin-compatible with earlier IDT SRAMs?
Yes, the 71V256SA20PZG maintains identical pinout and function mapping with prior IDT71V256SA variants in TSOP packaging, including the 71V256SA12PZG and 71V256SA15PZG. Address pins A0–A14, I/O0–I/O7, and control signals CS, WE, OE, VCC, and GND occupy the same positions in the PZG28 package, enabling speed-bin upgrades without layout changes.
What package type does the 71V256SA20PZG use, and what are its dimensions?
The 71V256SA20PZG uses a 28-pin TSOP Type I package designated PZG28, measuring 18.4mm × 8.2mm with 0.5mm lead pitch. It complies with JEDEC MO-153 standards and is optimized for reflow soldering. This package replaces the older SOJ variant for improved thermal performance and automated assembly yield, and is explicitly listed in the Renesas ordering information for the 71V256SA20PZG.
71V256SA20PZG 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
71V256SA20PZG FAQ
1.How can I place an order for 71V256SA20PZG through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V256SA20PZG 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 71V256SA20PZG reliable?
The price and inventory of 71V256SA20PZG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V256SA20PZG is usually 5 days.
3.What payment methods are accepted for 71V256SA20PZG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V256SA20PZG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71V256SA20PZG?
71V256SA20PZG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V256SA20PZG 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 71V256SA20PZG?
For technical support, including 71V256SA20PZG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V256SA20PZG requirements.
6.How does Aetrix verify that 71V256SA20PZG is sourced from the original manufacturer or authorized distributors?
All 71V256SA20PZG 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 71V256SA20PZG meets industry standards.
7.What is the process for return or replacement of 71V256SA20PZG?
All 71V256SA20PZG units undergo pre-shipment inspection (PSI). If there is an issue with 71V256SA20PZG, 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 71V256SA20PZG part is unused and in its original packaging.
Return procedure for 71V256SA20PZG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71V256SA20PZG 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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