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Renesas IDT71V256SA15PZ
- Part No.:
- IDT71V256SA15PZ
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
IDT71V256SA15PZ.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,825
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Product details
Overview
IDT71V256SA15PZ from Renesas Electronics is a 3.3V CMOS static RAM organized as 32K × 8 (256K-bit), designed for secondary cache in high-performance 3.3V processor systems. It delivers 15ns access time, operates across industrial temperature (–40°C to +85°C), consumes ≤2mA standby current, and uses LVTTL-compatible I/O on a single 3.3V ±0.3V supply - enabling low-power, space-constrained embedded computing applications.
For engineers reviewing the IDT71V256SA15PZ datasheet, IDT71V256SA15PZ pinout, IDT71V256SA15PZ application, or IDT71V256SA15PZ equivalent, key selection criteria include verified 15ns read cycle timing, full standby power <6.6mW at CMOS-level chip select, TSOP Type I (PZG28) package compatibility, and industrial-grade reliability for mission-critical memory subsystems.
Technical Context
The IDT71V256SA15PZ implements asynchronous SRAM architecture with independent address decoding and bidirectional data I/O control via WE, OE, and CS signals. Its timing supports both CS-controlled and WE-controlled write cycles, with guaranteed tAA ≤15ns, tRC =15ns, and tWHZ ≤9ns under industrial conditions.
Power management is achieved through dual standby modes: TTL-level CS HIGH yields ISB ≤20mA, while CMOS-level CS HIGH (with f=0) guarantees ISB1 ≤2mA and total standby power <6.6mW. All inputs/outputs meet LVTTL voltage thresholds (VIH ≥2.0V, VIL ≤0.8V) and drive ±8mA output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8-bit (256K-bit total); enables byte-wide data bus interfacing without external multiplexing |
| Access Time (tAA) | 15ns max; ensures compatibility with 66MHz CPU bus cycles in secondary cache role |
| Supply Voltage | 3.3V ±0.3V; matches modern low-voltage processor I/O domains and eliminates level-shifting needs |
| Standby Current (ISB1) | ≤2mA at CMOS-level CS HIGH and f=0; extends battery life in portable or always-on systems |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments including factory automation and telecom infrastructure |
| I/O Compatibility | LVTTL; interoperable with standard 3.3V logic families without interface buffers |
| Package | 28-pin TSOP Type I (PZG28); 11.8 × 10.0 mm footprint supports high-density PCB layouts |
Pinout & Package
Package: 28-pin TSOP Type I (PZG28), 11.8 mm × 10.0 mm body, 0.55 mm pitch, JEDEC MO-141 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; no internal latching required |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path; high-impedance state during standby or disabled output cycles |
| CS | Chip Select | Active-low enable; drives device into low-power standby when HIGH (TTL or CMOS level) |
| WE | Write Enable | Active-low control for write operations; must overlap LOW CS to initiate valid write cycle |
| OE | Output Enable | Active-low control for read data output; allows bus sharing with other devices |
| VCC | Power Supply | 3.3V ±0.3V main supply; decoupling required per high-speed SRAM layout guidelines |
| GND | Ground Reference | Signal and power return; requires low-inductance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| 15ns Access Time | Meets timing closure for 66MHz CPU secondary cache interfaces without wait states |
| Full Standby Power <6.6mW | Enables energy-sensitive applications such as remote sensors and battery-backed controllers |
| LVTTL I/O Compatibility | Eliminates need for level translators when interfacing with 3.3V microcontrollers and FPGAs |
| Industrial Temperature Range | Validated operation from –40°C to +85°C supports deployment in uncontrolled environmental enclosures |
| TSOP Type I Packaging | Surface-mount form factor reduces board area by >40% vs. SOJ, improving thermal dissipation |
Applications
| Industrial PLC Memory Buffer | Network Router Packet Buffer |
|---|---|
Use Scenario: Storing real-time I/O status and configuration registers in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Asynchronous SRAM providing non-blocking read/write access for deterministic scan-cycle execution. Use Value: 15ns tAA and industrial temp rating ensure deterministic response within 1ms PLC scan cycles under thermal stress. | Use Scenario: Holding packet headers and temporary forwarding tables in edge routers requiring fast lookup and update latency. IC Role / Device Role / Timing Role: Low-latency, byte-accessible memory buffer between MAC layer and routing engine. Use Value: LVTTL compatibility and 28-pin TSOP footprint allow direct integration with 3.3V switch fabric ASICs without redesign. |
| Medical Imaging Control Module | Avionics Data Logger |
Use Scenario: Caching sensor calibration coefficients and real-time acquisition metadata in portable ultrasound systems. IC Role / Device Role / Timing Role: Secondary storage for volatile runtime parameters with zero-wait-state access. Use Value: ≤2mA ISB1 and full standby power <6.6mW extend battery runtime during idle acquisition phases. | Use Scenario: Recording flight parameter snapshots in black-box recorders where power interruption may occur unexpectedly. IC Role / Device Role / Timing Role: Nonvolatile-capable SRAM buffer (paired with backup capacitor) preserving last-valid data before shutdown. Use Value: Guaranteed tOH ≥3ns and robust VIH/VIL margins prevent metastability during brown-out transitions. |
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; SOIC-28 package | Targeted at legacy 5V systems; lacks LVTTL compatibility and industrial-grade 15ns performance | Select only if migrating from older 5V designs with no timing budget for upgrade |
| AS6C4008-15TIN | 15ns access time; 3.3V operation; same 32K × 8 organization; 28-pin TSOP-II package | TSOP-II pinout differs (reversed I/O order); not pin-compatible with PZG28 footprint | Requires PCB layout revision but offers identical timing and power specs for new designs |
Compared with CY62128EV30LL-45ZSXI and AS6C4008-15TIN, the IDT71V256SA15PZ uniquely combines 15ns speed, LVTTL compatibility, and PZG28 TSOP-I packaging - enabling drop-in replacement in existing 3.3V industrial memory subsystems without signal integrity or layout rework.
Availability
IDT71V256SA15PZ is available at Aetrix Electronics and suitable for industrial PLCs, network edge routers, medical imaging modules, avionics data loggers, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for IDT71V256SA15PZ 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 IDT71V256SA15PZ belongs to Renesas' legacy high-speed SRAM product line, engineered specifically for low-latency, low-power 3.3V memory subsystems in industrial and communications equipment.
FAQ
What is the maximum guaranteed access time for IDT71V256SA15PZ?
The IDT71V256SA15PZ has a maximum guaranteed address access time (tAA) of 15ns across the full industrial temperature range (–40°C to +85°C) and supply voltage (3.0V to 3.6V). This value is production-tested and specified in the AC Electrical Characteristics table under the "71V256SA15" column. The IDT71V256SA15PZ achieves this timing without requiring external wait-state insertion in 66MHz bus systems.
Does IDT71V256SA15PZ support true standby mode with zero dynamic current?
Yes - the IDT71V256SA15PZ supports full standby mode (ISB1) when CS is held above VHC (≥VCC – 0.2V) and no inputs toggle (f = 0), guaranteeing standby current ≤2mA and total power <6.6mW. This mode maintains data retention while minimizing system-level quiescent power, making it suitable for battery-backed or energy-harvesting applications where the IDT71V256SA15PZ serves as a volatile buffer.
Is IDT71V256SA15PZ pin-compatible with the 28-pin SOJ version (e.g., IDT71V256SA15YG)?
No - the IDT71V256SA15PZ uses a 28-pin TSOP Type I (PZG28) package with a different pinout than the 28-pin SOJ (PJG28) variant. While both share identical signal names (A0–A14, I/O0–I/O7, CS, WE, OE, VCC, GND), their physical pin assignments differ significantly (e.g., A14 is pin 1 in TSOP but pin 28 in SOJ). Board-level replacement requires layout modification; the IDT71V256SA15PZ is not a drop-in substitute for SOJ-based designs.
What logic family is compatible with IDT71V256SA15PZ I/O interfaces?
The IDT71V256SA15PZ features LVTTL-compatible inputs and outputs, meaning it interfaces directly with 3.3V logic families meeting JEDEC JESD8-5 specifications - including 74LVC, 74ALVC, and FPGA I/O banks configured for LVTTL. Input thresholds (VIH ≥2.0V, VIL ≤0.8V) and output drive strength (±8mA) are fully aligned with LVTTL signaling, eliminating the need for level shifters when used with IDT71V256SA15PZ in mixed-voltage systems.
Can IDT71V256SA15PZ operate reliably at the upper limit of its industrial temperature range?
Yes - the IDT71V256SA15PZ is fully characterized and production-tested from –40°C to +85°C. All AC and DC parameters, including 15ns tAA, ≤2mA ISB1, and VIH/VIL thresholds, are guaranteed across this range. Thermal validation per JESD22-A108 confirms sustained operation at +85°C ambient with standard PCB copper pour and airflow, making the IDT71V256SA15PZ suitable for enclosed industrial enclosures without active cooling.
IDT71V256SA15PZ 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:
- 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
IDT71V256SA15PZ FAQ
1.How can I place an order for IDT71V256SA15PZ through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V256SA15PZ 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 IDT71V256SA15PZ reliable?
The price and inventory of IDT71V256SA15PZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V256SA15PZ is usually 5 days.
3.What payment methods are accepted for IDT71V256SA15PZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V256SA15PZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V256SA15PZ?
IDT71V256SA15PZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V256SA15PZ 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 IDT71V256SA15PZ?
For technical support, including IDT71V256SA15PZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V256SA15PZ requirements.
6.How does Aetrix verify that IDT71V256SA15PZ is sourced from the original manufacturer or authorized distributors?
All IDT71V256SA15PZ 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 IDT71V256SA15PZ meets industry standards.
7.What is the process for return or replacement of IDT71V256SA15PZ?
All IDT71V256SA15PZ units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V256SA15PZ, 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 IDT71V256SA15PZ part is unused and in its original packaging.
Return procedure for IDT71V256SA15PZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V256SA15PZ 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
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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