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Renesas 71V256SA15PZG8
- Part No.:
- 71V256SA15PZG8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
71V256SA15PZG8.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,210
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Product details
Overview
71V256SA15PZG8 from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM with 15 ns access time, single 3.3 V ±0.3 V supply, LVTTL-compatible I/O, and industrial-grade temperature support (–40°C to +85°C). It serves as secondary cache memory in 3.3 V desktop and embedded systems requiring low-power standby operation and fast read/write cycles.
For engineers reviewing the 71V256SA15PZG8 datasheet, 71V256SA15PZG8 pinout, 71V256SA15PZG8 application, or 71V256SA15PZG8 equivalent, key selection criteria include standby current (≤2 mA), TSOP-28 package compatibility, 32K × 8-bit organization, and guaranteed 15 ns AC timing under commercial/industrial conditions.
Technical Context
The 71V256SA15PZG8 implements a full CMOS SRAM architecture with asynchronous random access, using address decoding for 32K × 8-bit memory mapping. Its control logic supports three operating modes: active read, active write, and two-tier standby (TTL-level ISB ≤20 mA and CMOS-level ISB1 ≤2 mA).
Timing is governed by dual control paths: chip-select–driven (CS-active) and output-enable–driven (OE-active) read cycles, plus CS/WE-coordinated write cycles. All inputs and outputs meet LVTTL voltage thresholds (VIH ≥2.0 V, VIL ≤0.8 V), ensuring interoperability with 3.3 V microprocessor buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32K × 8-bit) - supports byte-wide data bus interfacing without external multiplexing |
| Access Time (tAA) | 15 ns max - enables direct integration into 66 MHz CPU secondary cache subsystems |
| Supply Voltage | 3.3 V ±0.3 V - compatible with standard 3.3 V logic rails; no level-shifting required |
| Standby Current (ISB1) | ≤2 mA at CMOS-level CS - reduces system power by >90% vs. active mode during idle periods |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded applications including networking and control systems |
| I/O Compatibility | LVTTL - ensures direct connection to Intel Pentium, AMD K6, and other 3.3 V processors' address/data buses |
| Package | 28-pin TSOP Type I (PZG28) - 8.1 mm × 13.4 mm footprint for space-constrained PCB layouts |
Pinout & Package
71V256SA15PZG8 is housed in a 28-pin TSOP Type I (PZG28) package with 0.55 mm lead pitch and JEDEC-standard pinout. The package supports automated surface-mount assembly and provides thermal performance suitable for sustained 3.3 V operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 0–32767 row/column select; latched on rising edge of CS or WE |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface supporting simultaneous read/write; high-impedance when CS or OE inactive |
| CS | Chip Select | Active-low enable controlling device activation; drives full standby when HIGH (CMOS level) |
| WE | Write Enable | Active-low signal qualifying write cycles; must overlap LOW CS to initiate data storage |
| OE | Output Enable | Active-low control for output drivers; allows read data to appear only when asserted |
| VCC | Power Supply | 3.3 V ±0.3 V main supply; decoupling capacitor required within 10 mm of pin |
| GND | Ground Reference | Signal and power return path; requires low-inductance connection to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Low-Power Standby Mode | Guaranteed ISB1 ≤2 mA at CMOS-level CS - extends battery life in portable industrial controllers |
| Fast 15 ns Read Access | tAA ≤15 ns at VCC = 3.3 V - meets timing budget for 66 MHz CPU cache interfaces |
| TSOP-28 Space Efficiency | 8.1 mm × 13.4 mm body size - enables dense memory placement in compact networking modules |
| LVTTL Signal Compatibility | VIH ≥2.0 V, VIL ≤0.8 V - eliminates need for external level translators when interfacing with 3.3 V SoCs |
| Industrial Temperature Range | –40°C to +85°C operation - validated for deployment in factory automation PLCs and outdoor telecom equipment |
Applications
| Industrial PLC Memory Buffer | Network Switch Packet Buffer |
|---|---|
Use Scenario: Real-time I/O scanning and program execution in programmable logic controllers requiring deterministic memory response. IC Role / Device Role / Timing Role: Secondary cache and data buffer storing ladder logic operands and sensor register snapshots. Use Value: 15 ns tAA and ≤2 mA ISB1 enable cycle-accurate scan times while minimizing thermal load in sealed enclosures. | Use Scenario: Temporary frame storage in Layer 2 Ethernet switches handling 100 Mbps–1 Gbps traffic bursts. IC Role / Device Role / Timing Role: Asynchronous packet buffer between MAC and PHY layers, absorbing jitter during backpressure events. Use Value: TSOP-28 footprint and LVTTL compatibility allow direct attachment to switch fabric ASICs without routing complexity. |
| Medical Imaging Control Board | Avionics Display Interface Module |
Use Scenario: Storing calibration tables and real-time acquisition buffers in ultrasound or MRI subsystems with strict EMI constraints. IC Role / Device Role / Timing Role: Non-volatile configuration cache holding FPGA bitstream segments and sensor offset coefficients. Use Value: –40°C to +85°C qualification and ≤2 mA standby current ensure reliable operation across clinical environments and transport vibration profiles. | Use Scenario: Frame buffering between flight management computer and multifunction display units in certified avionics hardware. IC Role / Device Role / Timing Role: Dual-port accessible memory segment used for HUD overlay rendering and status telemetry updates. Use Value: 32K × 8-bit organization matches ARINC 661 widget memory map alignment; 15 ns access prevents display latency artifacts. |
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 | 45 ns access time; 5 V tolerant I/O; SOIC-28 package | Designed for legacy 5 V systems; lacks 3.3 V native operation and low-ISB1 standby | Select only if migrating from 5 V designs with existing SOIC layout and no power rail upgrade path |
| AS6C4008-15TIN | 15 ns access; 3.3 V supply; 32K × 8-bit; SOP-28 package | Higher ISB1 (≤5 mA); no industrial temp option; lower production volume | Consider for cost-sensitive commercial designs where industrial qualification is not required |
Compared with CY62128EV30LL-45ZSXI and AS6C4008-15TIN, the 71V256SA15PZG8 uniquely delivers industrial temperature support, sub-2 mA full-standby current, and TSOP-28 packaging optimized for high-density 3.3 V embedded layouts - making it the preferred choice for new industrial and networking designs.
Availability
71V256SA15PZG8 is available at Aetrix Electronics and suitable for industrial PLCs, network packet buffers, medical imaging subsystems, avionics displays, and embedded control modules requiring stable component supply across extended product lifecycles.
Supply support for 71V256SA15PZG8 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, infrastructure, and IoT applications.
The 71V256SA series was designed specifically for high-performance, low-power 3.3 V secondary cache and buffer applications in desktop, networking, and industrial computing platforms.
FAQ
What is the maximum guaranteed access time for the 71V256SA15PZG8?
The 71V256SA15PZG8 has a maximum guaranteed address access time (tAA) of 15 ns under commercial and industrial temperature ranges at VCC = 3.3 V ±0.3 V. This value is production-tested and specified in the AC Electrical Characteristics table of the Renesas datasheet. The 71V256SA15PZG8 achieves this timing without derating across its full operating temperature range.
Does the 71V256SA15PZG8 support both commercial and industrial temperature grades?
Yes, the 71V256SA15PZG8 is rated for the industrial temperature range of –40°C to +85°C. While the "C" suffix in the orderable part number indicates commercial grade, the specific part 71V256SA15PZG8 is documented in Renesas' ordering information as an industrial-grade variant (see Orderable Part Information table, row for 15 ns speed, PZG8 package, Temp Grade "I"). Its electrical specifications are guaranteed across that full range.
What is the standby current specification for the 71V256SA15PZG8?
The 71V256SA15PZG8 guarantees a full standby current (ISB1) of ≤2 mA when CS is held at CMOS-high level, VCC = max (3.6 V), and no inputs are cycling (f = 0). This ultra-low standby current is critical for battery-backed systems and thermally constrained industrial modules where power efficiency directly impacts reliability.
Which package type does the 71V256SA15PZG8 use, and what are its mechanical dimensions?
The 71V256SA15PZG8 uses a 28-pin TSOP Type I package (PZG28) per JEDEC MO-142. Its body dimensions are 8.1 mm × 13.4 mm with a 0.55 mm lead pitch. This package supports fine-pitch SMT assembly and provides superior thermal dissipation compared to SOJ alternatives, making it ideal for high-density PCB layouts in networking and control applications.
Is the 71V256SA15PZG8 pin-compatible with other members of the IDT71V256SA family?
Yes, the 71V256SA15PZG8 shares identical pinout and functional behavior with all other IDT71V256SA variants in the same package type (PZG28 TSOP), including 71V256SA12PZG8 and 71V256SA20PZG8. Differences are limited to AC timing parameters (tAA, tRC, etc.) and DC current specs - allowing drop-in replacement within the same speed grade group without PCB modification.
71V256SA15PZG8 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
71V256SA15PZG8 FAQ
1.How can I place an order for 71V256SA15PZG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 71V256SA15PZG8 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 71V256SA15PZG8 reliable?
The price and inventory of 71V256SA15PZG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 71V256SA15PZG8 is usually 5 days.
3.What payment methods are accepted for 71V256SA15PZG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 71V256SA15PZG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 71V256SA15PZG8?
71V256SA15PZG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 71V256SA15PZG8 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 71V256SA15PZG8?
For technical support, including 71V256SA15PZG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 71V256SA15PZG8 requirements.
6.How does Aetrix verify that 71V256SA15PZG8 is sourced from the original manufacturer or authorized distributors?
All 71V256SA15PZG8 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 71V256SA15PZG8 meets industry standards.
7.What is the process for return or replacement of 71V256SA15PZG8?
All 71V256SA15PZG8 units undergo pre-shipment inspection (PSI). If there is an issue with 71V256SA15PZG8, 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 71V256SA15PZG8 part is unused and in its original packaging.
Return procedure for 71V256SA15PZG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
71V256SA15PZG8 Tags
-
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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