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Renesas 71V256SA15PZGI
- Part No.:
- 71V256SA15PZGI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
71V256SA15PZGI.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,630
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Product details
Overview
71V256SA15PZGI from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM with 15 ns access time, industrial temperature range (–40°C to +85°C), single 3.3 V ±0.3 V supply, and LVTTL-compatible I/O - designed for secondary cache in embedded computing and industrial control systems requiring low-power standby operation.
For engineers reviewing the 71V256SA15PZGI datasheet, 71V256SA15PZGI pinout, 71V256SA15PZGI application, or 71V256SA15PZGI equivalent, this page delivers verified timing parameters, package-specific terminal mapping, industrial-grade power behavior, and real-world use context for cache memory selection in space-constrained, thermally demanding designs.
Technical Context
The 71V256SA15PZGI implements asynchronous SRAM architecture with full TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and CMOS-level standby control. Its dual-mode standby-TTL-level (ISB ≤ 20 mA) and full CMOS-level (ISB1 ≤ 2 mA)-enables dynamic power scaling based on chip select logic level.
It supports both CS-controlled and WE-controlled write cycles with guaranteed tWC = 15 ns, tAA = 15 ns, and tCLZ = 5 ns. The device uses address-decoded memory array with no internal refresh, eliminating timing overhead and ensuring deterministic latency critical for cache coherency in microprocessor subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (262,144 bits), byte-wide parallel interface |
| Access Time (tAA) | 15 ns maximum - ensures compatibility with 66 MHz bus timing in 3.3 V systems |
| Supply Voltage | 3.3 V ± 0.3 V - matches modern low-voltage processor I/O domains without level translation |
| Standby Current (ISB1) | ≤ 2 mA at full CMOS-level standby - enables >10× reduction vs active mode for battery-backed applications |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, transportation, and outdoor edge controllers |
| I/O Compatibility | LVTTL - interoperable with 3.3 V FPGA, ASIC, and microcontroller GPIO without external buffers |
| Package | 28-pin TSOP Type I (PZG28), 8.1 mm × 13.4 mm footprint - optimized for high-density PCB layouts |
Pinout & Package
71V256SA15PZGI is housed in a 28-pin TSOP Type I (PZG28) package with 0.5 mm pitch and JEDEC-standard pinout. The package supports reflow soldering and meets RoHS/Green compliance per ordering code suffix 'G' and 'I'.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; TTL-compatible thresholds ensure noise margin in noisy industrial environments |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit data path with tristate control via OE/WE/CS; output drive strength (IOH = –4 mA, IOL = 8 mA) sustains signal integrity across 5 cm traces |
| CS | Chip Select | Active-low enable controlling full device standby; CMOS-level high (> VCC – 0.2 V) triggers ISB1 ≤ 2 mA mode |
| WE | Write Enable | Active-low write strobe; controls data latching on falling edge; supports WE- or CS-controlled write timing modes |
| OE | Output Enable | Active-low read control; places outputs in high-Z when deasserted, enabling bus sharing with other peripherals |
| VCC | Power Supply | 3.3 V ± 0.3 V primary supply; decoupling required within 1 cm of pin per high-frequency current demands |
| GND | Ground Reference | Common return for all signals; requires dedicated plane connection to minimize ground bounce during fast transitions |
Key Features
| Feature | Design Value |
|---|---|
| Industrial Temperature Range | –40°C to +85°C operation validated across full speed grade - eliminates derating concerns in uncontrolled thermal environments |
| Low-Power Full Standby | ISB1 ≤ 2 mA at CMOS-level CS high - extends runtime in battery-buffered SRAM retention applications |
| Fast 15 ns Read Access | tAA = 15 ns guaranteed - meets timing closure for 3.3 V Pentium-class secondary cache interfaces |
| LVTTL-Compatible I/O | VIH(min) = 2.0 V, VIL(max) = 0.8 V - ensures robust interfacing with legacy and modern 3.3 V logic families |
| Green Compliant Packaging | Halogen-free, lead-free TSOP (PZG28) - satisfies IPC-1752A and EU RoHS requirements for industrial OEMs |
Applications
| Industrial PLC Memory Buffer | Medical Imaging Frame Store |
|---|---|
|
Use Scenario: Real-time I/O buffering in programmable logic controllers handling analog sensor inputs and relay outputs under wide ambient temperature swings. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state data staging between ARM Cortex-M7 controller and fieldbus interface ICs. Use Value: 15 ns tAA and –40°C to +85°C rating ensure deterministic response during rapid scan cycles without thermal throttling or timing violations. |
Use Scenario: Temporary frame storage in portable ultrasound devices where image data must be held during DSP processing before display or transmission. IC Role / Device Role / Timing Role: Byte-accessible buffer holding one 512×512 monochrome frame (256 KB) with burst-read capability from imaging pipeline. Use Value: Low ISB1 (≤2 mA) extends battery life during idle periods between scans while maintaining instant data availability upon wake-up. |
| Ruggedized Network Router Cache | Avionics Data Logger Buffer |
|
Use Scenario: Packet header caching in fanless, conduction-cooled enterprise routers deployed in telecom cabinets with limited airflow. IC Role / Device Role / Timing Role: Secondary cache for MIPS-based packet forwarding engine, reducing DRAM access latency for frequent lookup tables. Use Value: TSOP package and 3.3 V operation simplify power delivery design while 15 ns access supports line-rate 1 Gbps packet processing. |
Use Scenario: Non-volatile event capture buffer in flight data recorders where SRAM retains last-minute telemetry before power loss triggers flash backup. IC Role / Device Role / Timing Role: Battery-backed memory node holding up to 32K samples of sensor data prior to EEPROM dump during safe shutdown. Use Value: Guaranteed operation at –40°C ensures reliability during cold-soak testing and high-altitude deployment without performance degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62256ELL-15ZXI | Same 32K × 8 organization, 15 ns access, but 5 V tolerant I/O (VIH up to 5.5 V); higher ISB1 (5 mA) | Preferred in mixed-voltage systems with legacy 5 V peripherals; less suitable for pure 3.3 V low-power designs | Select when interfacing with 5 V logic or requiring wider input voltage tolerance; verify VCC = 3.3 V compatibility in datasheet |
| AS6C4008-15TIN | Pin-compatible TSOP-28, 15 ns access, but only commercial temp range (0°C to +70°C); lower ICC (75 mA vs 85 mA) | Suitable for cost-sensitive consumer or lab equipment; not rated for extended industrial thermal cycling | Choose for non-critical indoor applications where temperature stability is assured; avoid in sealed enclosures without thermal management |
Compared with CY62256ELL-15ZXI and AS6C4008-15TIN, the 71V256SA15PZGI uniquely combines industrial temperature qualification, sub-2 mA full standby, and native 3.3 V LVTTL compatibility - making it optimal for thermally aggressive, battery-aware, and purely 3.3 V embedded systems.
Availability
71V256SA15PZGI is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging devices, ruggedized network infrastructure, and avionics data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 71V256SA15PZGI 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 IDT71V256SA family - now part of Renesas' legacy high-performance SRAM portfolio - was engineered specifically for low-latency, low-power cache and buffer roles in 3.3 V embedded systems operating under harsh environmental conditions.
FAQ
What is the operating temperature range for the 71V256SA15PZGI?
The 71V256SA15PZGI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all AC and DC parameters in the datasheet, including access time, standby current, and I/O voltage thresholds. It is not rated for extended temperature or military-grade operation beyond this range.
Does the 71V256SA15PZGI support true static operation without refresh?
Yes, the 71V256SA15PZGI is a fully asynchronous static RAM with no internal refresh circuitry. It retains data indefinitely as long as VCC and GND are maintained within specification and CS remains asserted (low) during active use. No external refresh controller or timing sequence is required.
What is the difference between ISB and ISB1 current ratings for the 71V256SA15PZGI?
ISB (≤20 mA) applies when CS is held at TTL-high (≥2.0 V), while ISB1 (≤2 mA) applies under full CMOS-level standby (CS > VCC – 0.2 V, f = 0). ISB1 represents the lowest possible quiescent current state and is critical for battery-backed retention applications where microamp-level savings matter.
Is the 71V256SA15PZGI pin-compatible with other 28-pin SRAMs like the 62256 series?
No, the 71V256SA15PZGI uses a standard 28-pin TSOP Type I pinout (PZG28) that matches JEDEC MO-141BA, but differs from 62256-family SOJ/DIP layouts. While address/data pin positions align with industry convention (A0–A14, I/O0–I/O7), control signal placement (CS, WE, OE) follows Renesas' specific assignment - verify against the 71V256SA15PZGI pin diagram before board reuse.
Can the 71V256SA15PZGI operate reliably at 3.0 V minimum supply voltage?
Yes, the 71V256SA15PZGI is specified for VCC = 3.0 V to 3.6 V. At 3.0 V, VOH remains ≥2.4 V (IOH = –4 mA) and VOL stays ≤0.4 V (IOL = 8 mA), preserving LVTTL logic margins. However, tAA increases to 17 ns (not guaranteed), so 3.3 V is recommended for full 15 ns timing compliance.
71V256SA15PZGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
71V256SA15PZGI FAQ
1.How can I place an order for 71V256SA15PZGI through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V256SA15PZGI 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 71V256SA15PZGI reliable?
The price and inventory of 71V256SA15PZGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V256SA15PZGI is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V256SA15PZGI transactions.
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71V256SA15PZGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V256SA15PZGI 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 71V256SA15PZGI?
For technical support, including 71V256SA15PZGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V256SA15PZGI requirements.
6.How does Aetrix verify that 71V256SA15PZGI is sourced from the original manufacturer or authorized distributors?
All 71V256SA15PZGI 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 71V256SA15PZGI meets industry standards.
7.What is the process for return or replacement of 71V256SA15PZGI?
All 71V256SA15PZGI units undergo pre-shipment inspection (PSI). If there is an issue with 71V256SA15PZGI, 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 71V256SA15PZGI part is unused and in its original packaging.
Return procedure for 71V256SA15PZGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71V256SA15PZGI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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