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Renesas IDT71V416VS15PH8
- Part No.:
- IDT71V416VS15PH8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
IDT71V416VS15PH8.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 44TSOP II
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
IDT71V416VS15PH8 from Integrated Device Technology is a 256K × 16-bit (4 Mbit), 3.3V CMOS static RAM with 15 ns access time, JEDEC-compliant center power/ground pinout, and LVTTL-compatible bidirectional I/O. It operates across industrial temperature range (–40°C to +85°C), supports byte-wide and word-wide read/write via BHE/BLE, and is used in real-time embedded control buffers and legacy bus-interface memory subsystems.
For engineers reviewing the IDT71V416VS15PH8 datasheet, IDT71V416VS15PH8 pinout, IDT71V416VS15PH8 application, or IDT71V416VS15PH8 equivalent, key selection criteria include 15 ns tAA/tRC timing, SOJ-44 package compatibility, industrial-grade reliability, low-Z output enable response (tOLZ = 0 ns), and dual-byte write enable functionality for x8/x16 data path optimization.
Technical Context
The IDT71V416VS15PH8 implements fully static asynchronous circuitry-no clocks or refresh required-and uses high-reliability CMOS fabrication for stable operation under continuous address cycling. Its architecture includes independent high- and low-byte enable paths (BHE/BLE), separate OE-controlled output drivers, and a 17-bit address bus (A0–A17) decoding a 256K-word space.
Timing is governed by three parallel control hierarchies: chip-select–driven (tACS), output-enable–driven (tOE), and byte-enable–driven (tBE), each with guaranteed 15 ns max access and 7 ns high-Z transitions. All inputs meet LVTTL voltage thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) at 3.3 V supply, and dynamic current draw remains ≤170 mA (industrial) during full-speed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (256K × 16), enabling direct replacement of legacy 256K-word x16 SRAMs without data-width conversion logic. |
| Access Time (tAA) | 15 ns max (industrial temp), defining minimum address hold before valid data appears on I/O pins during read cycles. |
| Supply Voltage | 3.0–3.6 V, compatible with standard 3.3 V LVTTL system rails and tolerant of ±10% regulation drift. |
| Input Capacitance | 7 pF max (SOJ/TSOP), limiting signal integrity impact on high-speed address/control buses driving multiple devices. |
| Standby Current (ISB1) | 20 mA max (industrial), ensuring low-power retention during CPU idle states without external power gating. |
| Byte Enable Setup | tAS = 0 ns, allowing immediate assertion of BHE/BLE concurrent with address transition-critical for burst-mode microprocessor interfaces. |
Pinout & Package
Package: 44-pin, 400-mil plastic SOJ (SO44-1), JEDEC-standard footprint with center VDD/VSS arrangement for noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus selecting one of 256K words; A17 enables full 4 Mbit addressing without bank switching. |
| CS | Chip Select | Active-low global enable: device enters standby (high-Z I/O, ISB1 = 20 mA) when deasserted. |
| OE | Output Enable | Active-low control of output drivers only; does not affect internal state or power mode-enables bus sharing. |
| WE | Write Enable | Active-low signal initiating write cycle; combined with BHE/BLE determines byte vs. word write granularity. |
| BHE, BLE | Byte Enable | Independent active-low controls for upper (I/O8–I/O15) and lower (I/O0–I/O7) data bytes-supports mixed-width transfers. |
| I/O0–I/O15 | Bidirectional Data | LVTTL-compatible 16-bit data bus; direction auto-switched per cycle-no external transceivers needed. |
| VDD, VSS | Power/Ground | Center-placed pins (Pins 12 & 25) reduce simultaneous switching noise and improve decoupling efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center Power/GND Pinout | Reduces ground bounce and supply noise by symmetrically distributing VDD/VSS across package center-critical for multi-SRAM bus stability. |
| Zero-Setup Byte Enables (tAS = 0 ns) | Eliminates timing margin loss between address assertion and BHE/BLE activation-enables tight-cycle microcontroller interfacing. |
| Sub-5 ns Output Enable Response (tOLZ = 0 ns) | Guarantees immediate driver activation upon OE low, supporting fast turnaround on shared data buses without dead cycles. |
| Industrial Temperature Range (–40°C to +85°C) | Validated operation across extended thermal envelope-suitable for transportation, industrial PLC, and outdoor telecom equipment. |
| Single 3.3 V Supply Operation | Removes need for dual-voltage regulation (e.g., 5 V + 3.3 V), simplifying power design and reducing BOM count in modern embedded systems. |
Applications
| Industrial PLC Data Buffers | Legacy PCI/ISA Bus Memory Modules |
|---|---|
Use Scenario: Real-time I/O scan buffering in programmable logic controllers where deterministic latency and data integrity are critical. IC Role / Device Role / Timing Role: High-speed scratchpad memory holding input/output image tables with 15 ns read/write cycle consistency. Use Value: Eliminates wait states in scan cycles due to guaranteed tRC = 15 ns and zero-address-setup requirement for BHE/BLE. | Use Scenario: Drop-in memory expansion on aging industrial motherboards using ISA or 32-bit PCI local bus architectures. IC Role / Device Role / Timing Role: x16 asynchronous SRAM replacing obsolete 256K×16 parts while maintaining pin-compatible SOJ-44 footprint and LVTTL signaling. Use Value: Direct replacement without PCB redesign-same JEDEC pinout, identical VDD/VSS placement, and compatible tAA/tWC timing margins. |
| Avionics Display Frame Buffers | Test Equipment Pattern Generators |
Use Scenario: Storing rasterized display frames in ruggedized cockpit displays requiring radiation-tolerant, non-refreshing memory. IC Role / Device Role / Timing Role: Static frame buffer holding 1024×768 monochrome pixel maps with byte-select capability for partial updates. Use Value: BHE/BLE support enables selective update of upper/lower display halves-reducing bandwidth and power versus full-frame writes. | Use Scenario: Generating high-speed digital stimulus patterns in automated test equipment with precise edge-aligned timing. IC Role / Device Role / Timing Role: Pattern storage element synchronized to 66 MHz bus clocks, leveraging tOH = 4 ns output hold for clean data capture. Use Value: 4 ns tOH ensures stable data windows for downstream comparators-even at maximum 66.7 MHz effective bus rate (15 ns cycle). |
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 |
|---|---|---|---|
| CY62167EV30LL-15ZSXI | Same density (256K×16), 15 ns speed, but uses TSOP-II package (44-pin) and has higher ISB1 (30 mA vs. 20 mA). | Lower standby current in IDT71V416VS15PH8 benefits thermally constrained industrial enclosures. | Select IDT71V416VS15PH8 when SOJ-44 mechanical fit and minimal ISB1 are mandatory; choose Cypress part if TSOP-II board layout already exists. |
| AS6C4008-15PIN | 256K×16, 15 ns, SOJ-44, but rated only for commercial temp (0°C to +70°C) and lacks BHE/BLE-requires external byte logic. | IDT71V416VS15PH8 supports industrial environments and native byte writes without glue logic. | Choose IDT71V416VS15PH8 for extended temperature operation or simplified system design; AS6C4008-15PIN suits cost-sensitive commercial-only designs with existing byte-handling circuitry. |
Compared with CY62167EV30LL-15ZSXI and AS6C4008-15PIN, the IDT71V416VS15PH8 uniquely combines industrial temperature rating, SOJ-44 mechanical compatibility, integrated BHE/BLE, and lowest ISB1-making it optimal for ruggedized embedded systems where thermal margin, layout continuity, and power efficiency are jointly constrained.
Availability
IDT71V416VS15PH8 is available at Aetrix Electronics and suitable for industrial PLC data buffers, legacy PCI/ISA bus memory modules, avionics display frame buffers, and test equipment pattern generators requiring stable component supply across extended lifecycle programs.
Supply support for IDT71V416VS15PH8 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
Integrated Device Technology (IDT) was a U.S.-based semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019.
The IDT71V416VS15PH8 belongs to IDT's legacy high-speed CMOS SRAM product line, designed specifically for industrial and communications systems demanding reliable, no-refresh, low-latency memory with LVTTL compatibility and robust thermal performance.
FAQ
What is the operating temperature range for IDT71V416VS15PH8?
IDT71V416VS15PH8 is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per the manufacturer's recommended DC operating conditions and AC electrical characteristics tables, ensuring reliable read/write functionality-including tAA = 15 ns and ISB1 ≤ 20 mA-across the full range without derating.
Does IDT71V416VS15PH8 require a refresh circuit?
No, IDT71V416VS15PH8 does not require refresh circuitry. It is a fully static asynchronous SRAM built with CMOS technology that retains data indefinitely as long as power is applied and CS remains asserted. The device uses no clocks, eliminating timing-critical refresh overhead common in DRAMs-this is confirmed in the Functional Block Diagram and Description sections of the datasheet.
What package type is used by IDT71V416VS15PH8?
IDT71V416VS15PH8 uses a 44-pin, 400-mil plastic SOJ (Small Outline J-lead) package, designated SO44-1 in the datasheet. Pin 28 is NC or connectable to VSS, and the layout follows JEDEC center power/ground pinout (VDD at Pin 12, VSS at Pin 25) to minimize noise coupling.
Can IDT71V416VS15PH8 operate from a 3.0 V supply?
Yes, IDT71V416VS15PH8 supports a supply voltage range of 3.0 V to 3.6 V, as specified in the Recommended DC Operating Conditions table. At 3.0 V minimum, all timing parameters-including tAA = 15 ns and tOE = 7 ns-and DC characteristics such as VOH ≥ 2.4 V and VOL ≤ 0.4 V remain guaranteed across the industrial temperature range.
How does byte enable functionality work on IDT71V416VS15PH8?
IDT71V416VS15PH8 provides independent BHE (high byte enable) and BLE (low byte enable) inputs to control 8-bit segments of the 16-bit I/O bus. When BHE is low and BLE is high, only I/O8–I/O15 are active for read/write; when BLE is low and BHE is high, only I/O0–I/O7 respond. Both low enables full 16-bit word access-verified in the Truth Table and timing waveforms for Write Cycle No. 3.
IDT71V416VS15PH8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- 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:
- 44-TSOP II
IDT71V416VS15PH8 FAQ
1.How can I place an order for IDT71V416VS15PH8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V416VS15PH8 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 IDT71V416VS15PH8 reliable?
The price and inventory of IDT71V416VS15PH8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V416VS15PH8 is usually 5 days.
3.What payment methods are accepted for IDT71V416VS15PH8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V416VS15PH8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V416VS15PH8?
IDT71V416VS15PH8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V416VS15PH8 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 IDT71V416VS15PH8?
For technical support, including IDT71V416VS15PH8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V416VS15PH8 requirements.
6.How does Aetrix verify that IDT71V416VS15PH8 is sourced from the original manufacturer or authorized distributors?
All IDT71V416VS15PH8 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 IDT71V416VS15PH8 meets industry standards.
7.What is the process for return or replacement of IDT71V416VS15PH8?
All IDT71V416VS15PH8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V416VS15PH8, 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 IDT71V416VS15PH8 part is unused and in its original packaging.
Return procedure for IDT71V416VS15PH8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V416VS15PH8 Tags
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