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Renesas IDT71V256SA12PZ
- Part No.:
- IDT71V256SA12PZ
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA12PZ.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,063
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Product details
Overview
IDT71V256SA12PZ from Renesas Electronics is a 256K (32K × 8-bit) high-speed CMOS static RAM with 12 ns access time, single 3.3 V ±0.3 V supply, LVTTL-compatible I/O, and industrial 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 random read/write cycles.
For engineers reviewing the IDT71V256SA12PZ datasheet, IDT71V256SA12PZ pinout, IDT71V256SA12PZ application, or IDT71V256SA12PZ equivalent, key selection criteria include guaranteed 12 ns tAA/tRC timing, ISB1 ≤ 2 mA full-standby current, TSOP Type I (PZG28) package compatibility, and CS-controlled low-power entry-critical for battery-sensitive and thermally constrained designs.
Technical Context
The IDT71V256SA12PZ implements asynchronous SRAM architecture with independent address decoding, tri-state I/O control via OE/WE/CS, and CMOS-level full-standby mode triggered by CS > VHC. Its 32K × 8-bit organization supports byte-wide data bus interfacing without external demultiplexing.
It operates exclusively on a single 3.3 V supply with VIH/VIL thresholds aligned to LVTTL logic families (VIH ≥ 2.0 V, VIL ≤ 0.8 V), and guarantees AC timing under both commercial (0°C to +70°C) and industrial (–40°C to +85°C) conditions per its PZG28 TSOP packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32K × 8-bit) - supports full byte-accessed storage without bit-slicing overhead |
| Access Time (tAA) | 12 ns max - enables direct interface with 83 MHz CPU buses without wait states |
| Supply Voltage | 3.3 V ±0.3 V - compatible with standard 3.3 V logic rails and eliminates need for level shifters |
| Standby Current (ISB1) | ≤2 mA at full standby (CS = CMOS HIGH, f = 0) - extends battery life in portable cache applications |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade system deployment without derating |
| Package | 28-pin TSOP Type I (PZG28) - 0.5 mm pitch, surface-mount compatible with automated PCB assembly |
| I/O Compatibility | LVTTL - ensures interoperability with Intel Pentium, AMD K6, and other 3.3 V microprocessor address/data buses |
Pinout & Package
Package: 28-pin TSOP Type I (PZG28), 8.1 mm × 13.4 mm body, 0.5 mm lead pitch, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; TTL-compatible input thresholds |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path with tri-state output drivers controlled by OE/CS/WE |
| CS | Chip Select | Active-low enable; drives device into low-power standby when HIGH (CMOS level) |
| WE | Write Enable | Active-low write control; latches data on falling edge when CS is LOW |
| OE | Output Enable | Active-low output gate; controls data bus directionality during read cycles only |
| VCC | Power Supply | 3.3 V ±0.3 V main supply; decoupling required within 10 mm of pin |
| GND | Ground Reference | Signal and power return; must be connected to low-impedance ground plane |
Key Features
| Feature | Design Value |
|---|---|
| 12 ns Access Time | Meets real-time cache latency requirements for 3.3 V x86 and RISC processors without cycle stretching |
| Full Standby Power ≤6.6 mW | Enables zero-refresh retention during CPU sleep modes while maintaining data integrity |
| TSOP Type I Packaging | Reduces board area by 40% vs. SOJ; supports high-density layout in space-constrained modules |
| LVTTL I/O Compatibility | Eliminates external bus transceivers when interfacing with 3.3 V microcontrollers and FPGAs |
| Industrial Temperature Range | Validated operation across –40°C to +85°C ambient without thermal throttling or timing margin loss |
Applications
| Desktop CPU Secondary Cache | Industrial PLC Memory Buffer |
|---|---|
Use Scenario: High-speed temporary storage between CPU core and main DRAM in legacy 3.3 V desktop platforms. IC Role / Device Role / Timing Role: Asynchronous SRAM providing zero-wait-state read/write access to instruction and data caches. Use Value: 12 ns tAA ensures sub-84 MHz bus compatibility; ISB1 ≤2 mA reduces system idle power by >30% vs. older 5 V SRAMs. | Use Scenario: Nonvolatile buffer for real-time I/O status logging in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: Byte-addressable scratchpad memory holding sensor register snapshots and control command queues. Use Value: Industrial temp rating (–40°C to +85°C) and full-standby mode enable reliable operation during uncontrolled thermal cycling. |
| Medical Imaging Frame Store | Avionics Data Acquisition Buffer |
Use Scenario: Temporary frame buffering in ultrasound and digital X-ray subsystems where deterministic latency is critical. IC Role / Device Role / Timing Role: Low-jitter, asynchronous memory staging raw pixel data before compression or transmission. Use Value: Guaranteed 12 ns tCLZ/tOHZ timing ensures consistent data valid windows for FPGA-based image pipelines. | Use Scenario: Interfacing between ARINC 429 receivers and flight management unit processors in certified avionics hardware. IC Role / Device Role / Timing Role: Glueless interface to 3.3 V microcontrollers performing time-critical sensor fusion calculations. Use Value: LVTTL compatibility and 3.3 V-only supply simplify power architecture and reduce BOM count in DO-254-compliant designs. |
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-45ZAXI | 45 ns access time, 5 V tolerant I/O, 32K × 8-bit, SOIC-28 package | Designed for legacy 5 V systems; lacks 3.3 V native operation and industrial standby optimization | Select only if migrating from 5 V infrastructure; requires level-shifting and consumes ~5× more standby power |
| AS6C4008-12ZIN | 12 ns access, 3.3 V supply, 512K × 8-bit density, SOP-32 package | Higher density but larger footprint; no industrial temp grade available in 12 ns speed bin | Choose when memory capacity >256K is required; verify thermal profile since industrial qualification is absent |
Compared with CY62128EV30LL-45ZAXI and AS6C4008-12ZIN, the IDT71V256SA12PZ delivers optimal balance of speed, low-power standby, industrial temperature compliance, and compact TSOP packaging-making it the preferred choice for new 3.3 V embedded cache designs where board space and thermal envelope are constrained.
Availability
IDT71V256SA12PZ is available at Aetrix Electronics and suitable for desktop CPU cache, industrial PLC memory buffers, medical imaging frame stores, and avionics data acquisition systems requiring stable component supply and long-term lifecycle assurance.
Supply support for IDT71V256SA12PZ 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 IDT71V256SA12PZ belongs to Renesas' legacy high-speed CMOS SRAM product line, engineered specifically for low-latency, low-power secondary cache and buffer applications in 3.3 V computing and control systems.
FAQ
What is the maximum guaranteed access time for IDT71V256SA12PZ?
The IDT71V256SA12PZ has a maximum guaranteed address access time (tAA) of 12 ns and read cycle time (tRC) of 12 ns under industrial conditions (–40°C to +85°C) with VCC = 3.3 V ±0.3 V. This specification is production-tested and applies directly to the IDT71V256SA12PZ in its PZG28 TSOP package.
Does IDT71V256SA12PZ support true low-power standby mode?
Yes. When CS is driven to CMOS HIGH level (VHC), the IDT71V256SA12PZ enters full standby mode with ISB1 ≤ 2 mA and total power dissipation ≤6.6 mW. This state retains memory contents without refresh and is validated across the full industrial temperature range for the IDT71V256SA12PZ.
Is IDT71V256SA12PZ pin-compatible with other 28-pin SRAMs?
No. The IDT71V256SA12PZ uses a proprietary 28-pin TSOP Type I (PZG28) pinout defined in Renesas datasheet 3101 drw 03. While pin count matches generic 28-pin SRAMs, signal assignments (e.g., A14 on Pin 1, I/O7 on Pin 28) differ from JEDEC-standard SOIC or SOJ layouts-direct replacement requires PCB redesign.
What logic family is IDT71V256SA12PZ compatible with?
IDT71V256SA12PZ features LVTTL-compatible inputs and outputs, with VIH ≥ 2.0 V and VIL ≤ 0.8 V referenced to 3.3 V supply. It interfaces directly with 3.3 V microprocessors, FPGAs, and ASICs meeting LVTTL voltage thresholds-no level translation needed for the IDT71V256SA12PZ in compliant systems.
Can IDT71V256SA12PZ operate outside the 3.3 V supply range?
No. The IDT71V256SA12PZ is specified only for VCC = 3.0 V to 3.6 V. Operation below 3.0 V risks timing violations and data retention failure; above 3.6 V exceeds absolute maximum ratings and may cause permanent damage. All performance parameters-including those for IDT71V256SA12PZ-are guaranteed only within this 3.3 V ±0.3 V window.
IDT71V256SA12PZ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
IDT71V256SA12PZ FAQ
1.How can I place an order for IDT71V256SA12PZ through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA12PZ 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 IDT71V256SA12PZ reliable?
The price and inventory of IDT71V256SA12PZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA12PZ is usually 5 days.
3.What payment methods are accepted for IDT71V256SA12PZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA12PZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA12PZ?
IDT71V256SA12PZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA12PZ 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 IDT71V256SA12PZ?
For technical support, including IDT71V256SA12PZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA12PZ requirements.
6.How does Aetrix verify that IDT71V256SA12PZ is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA12PZ 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 IDT71V256SA12PZ meets industry standards.
7.What is the process for return or replacement of IDT71V256SA12PZ?
All IDT71V256SA12PZ units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA12PZ, 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 IDT71V256SA12PZ part is unused and in its original packaging.
Return procedure for IDT71V256SA12PZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA12PZ 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
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24LC01BT-I/SN
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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