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Renesas IDT71V416VS15PHGI
- Part No.:
- IDT71V416VS15PHGI
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
IDT71V416VS15PHGI.pdf
- Description:
- IC SRAM 4MBIT PARALLEL 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:4,671
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Product details
Overview
IDT71V416VS15PHGI 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 or full-word read/write via separate BHE/BLE controls, and targets high-speed buffering in legacy industrial controllers and FPGA co-processor memory subsystems.
For engineers reviewing the IDT71V416VS15PHGI datasheet, IDT71V416VS15PHGI pinout, IDT71V416VS15PHGI application, or IDT71V416VS15PHGI equivalent, key selection criteria include its 15 ns tAA/tACS timing, SOJ-44 package with VDD/VSS symmetry, dual-byte enable architecture, and industrial-grade standby current (ISB ≤ 50 mA at fMAX).
Technical Context
The IDT71V416VS15PHGI implements fully static asynchronous operation-no clocks or refresh required-and uses dedicated OE, CS, WE, BHE, and BLE inputs to control output enable, chip select, write enable, and independent high/low byte access. Its internal row/column decoder drives a 4,194,304-bit memory array with sense amps and write drivers optimized for 3.3V LVTTL signaling.
Timing is defined by overlapping control signals: read cycles require CS and OE low with WE high; write cycles require CS, WE, and at least one byte enable low. Output disable times (tCHZ = 7 ns, tOHZ = 7 ns) and fast output enable (tOE = 7 ns) support tight bus turnaround in multiplexed data-path systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16-bit (4,194,304-bit total); enables 16-bit data bus interfacing without external width expansion |
| Access Time (tAA) | 15 ns max at VDD = 3.0–3.6 V, TA = –40°C to +85°C; defines minimum address-to-data-valid delay in read cycles |
| Cycle Time (tRC) | 15 ns max; sets minimum interval between successive read or write operations on same address |
| Supply Voltage | 3.3 V nominal (3.0–3.6 V range); compatible with LVTTL logic families and eliminates level-shifting in 3.3V systems |
| Standby Current (ISB) | 50 mA max at fMAX, VDD = max; determines power budget during inactive periods in always-on industrial modules |
| Input Capacitance | 7 pF max (SOJ package); ensures signal integrity with standard PCB trace lengths and termination practices |
| Operating Temperature | –40°C to +85°C (industrial grade); validated for deployment in uncontrolled ambient environments like factory-floor PLCs |
Pinout & Package
Package: 44-pin, 400-mil plastic SOJ (SO44-1), JEDEC-standard center-power/ground layout (VDD on pins 12 & 33, VSS on pins 11 & 34) minimizing simultaneous switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; no address multiplexing required |
| CS | Chip Select | Active-low global enable; device enters high-Z standby when high, reducing system power |
| OE | Output Enable | Active-low control of output buffers; allows shared bus arbitration without requiring WE assertion |
| WE | Write Enable | Active-low write strobe; combined with BHE/BLE to define byte or word write boundaries |
| BHE, BLE | Byte Enable Inputs | Independent active-low controls for upper (I/O8–I/O15) and lower (I/O0–I/O7) data bytes |
| I/O0–I/O15 | Bidirectional Data | LVTTL-compatible 16-bit data bus; direction controlled dynamically by WE and byte enables |
| VDD | Power Supply | 3.3 V core supply (pins 12, 33); dual placement reduces IR drop and improves noise immunity |
| VSS | Ground | Signal ground (pins 11, 34); symmetric placement with VDD enforces balanced return paths |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Center Power/Ground Pinout | Reduces simultaneous switching noise (SSN) by interleaving VDD/VSS near I/O banks-critical for stable 15 ns timing in dense PCB layouts |
| Dual Byte Enable (BHE/BLE) | Enables selective 8-bit writes to high or low byte without disturbing adjacent data-essential for efficient protocol register updates in microcontroller peripherals |
| 5 ns Output Enable Propagation | tOE = 7 ns max ensures rapid bus release after read completion, enabling sub-20 ns cycle times in burst-access FIFO implementations |
| Full Standby Current (ISB1) | 10 mA max at f = 0 Hz confirms true static retention with negligible leakage-validates use in battery-backed memory hold applications |
| Industrial Temperature Range | –40°C to +85°C operation verified per AC/DC specs; eliminates derating concerns in extended-temperature embedded deployments |
Applications
| Industrial PLC Data Buffers | FPGA Co-Processor Memory |
|---|---|
Use Scenario: Real-time I/O scanning in programmable logic controllers where deterministic response under 20 ns latency is required. IC Role / Device Role / Timing Role: High-speed scratchpad memory holding process image tables, mapped directly to CPU address space with no wait states. Use Value: 15 ns tAA and tRC guarantee single-cycle access for 66 MHz bus interfaces, eliminating pipeline stalls during analog input sampling bursts. | Use Scenario: Local instruction/data storage for Xilinx Spartan or Intel Cyclone FPGA soft-core processors running real-time control firmware. IC Role / Device Role / Timing Role: Asynchronous SRAM interfaced to FPGA's general-purpose I/O banks, serving as zero-wait-state program RAM and stack buffer. Use Value: LVTTL compatibility and 16-bit width match FPGA I/O voltage and data path requirements, avoiding level shifters and reducing BOM count. |
| Legacy Bus Interface Adapters | Medical Imaging Frame Buffers |
Use Scenario: Bridging ISA or VMEbus peripherals to modern microprocessors in retrofitted test equipment. IC Role / Device Role / Timing Role: Memory-mapped interface buffer translating burst transfers between legacy 8/16-bit synchronous buses and asynchronous host controllers. Use Value: Dual-byte enables (BHE/BLE) allow precise alignment of 8-bit peripheral data into 16-bit host words without software masking overhead. | Use Scenario: Temporary storage of digitized ultrasound or X-ray frames prior to compression in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-latency frame buffer holding one full 1024×768 monochrome image (786 KB) with direct DMA access from ADC controller. Use Value: 50 mA ISB at fMAX enables continuous background acquisition while maintaining <100 mW standby power-critical for battery-operated handheld units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY62148EV30LL-45ZAXI | 4 Mbit (256K × 16), 45 ns access, 3.3 V, TSOP-44; higher tAA invalidates use in 15 ns timing-critical paths | Targeted at cost-sensitive, non-real-time data logging where latency >30 ns is acceptable | Select only if system timing margin exceeds 30 ns and board layout accommodates TSOP-44 footprint |
| AS6C4008-15PIN | 4 Mbit (256K × 16), 15 ns access, 3.3 V, SOJ-44; identical speed but rated only for commercial temp (0°C to +70°C) | Suitable for office automation or lab instruments without thermal stress requirements | Choose only if ambient operating temperature remains within 0°C–70°C and long-term reliability validation is not required |
Compared with CY62148EV30LL-45ZAXI and AS6C4008-15PIN, the IDT71V416VS15PHGI uniquely delivers 15 ns industrial-grade performance in SOJ-44 with JEDEC noise-reducing pinout-making it the sole option for legacy 16-bit bus systems demanding guaranteed timing at extended temperature.
Availability
IDT71V416VS15PHGI is available at Aetrix Electronics and suitable for industrial PLC data buffers, FPGA co-processor memory, and legacy bus interface adapters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for IDT71V416VS15PHGI 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. IDT emphasized high-reliability, high-speed memory and clock products for industrial and communications infrastructure.
The IDT71V416VS15PHGI belongs to IDT's 3.3V high-speed SRAM product line, designed specifically for asynchronous, low-latency memory interfacing in legacy 16-bit embedded systems where pin compatibility with JEDEC SOJ-44 footprints and industrial temperature resilience were mandatory design constraints.
FAQ
What is the maximum operating temperature range for the IDT71V416VS15PHGI?
The IDT71V416VS15PHGI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all AC and DC electrical parameters-including tAA = 15 ns, ISB ≤ 50 mA, and VIH/VIL thresholds-and applies to the SOJ-44 package variant denoted by the "I" suffix in the part number. The device maintains full functionality without derating throughout this range.
Does the IDT71V416VS15PHGI require a refresh circuit or clock signal?
No, the IDT71V416VS15PHGI is a fully static RAM and requires neither refresh circuitry nor clock signals. Its asynchronous design relies solely on address, CS, OE, WE, and byte enable inputs to control read/write operations. All internal circuitry-including decoders, sense amps, and write drivers-is static CMOS, enabling indefinite data retention as long as VDD is applied and CS remains high during standby.
Can the IDT71V416VS15PHGI be used with a 5V microcontroller interface?
No, the IDT71V416VS15PHGI is strictly a 3.3V LVTTL device with VIH(min) = 2.0 V and VIL(max) = 0.8 V. Direct connection to 5V logic violates absolute maximum ratings (VIN ≤ VDD + 0.5 V = 3.85 V) and risks permanent damage. Interfacing with 5V microcontrollers requires level translation-such as TI SN74AVC4T245 or NXP NXSL2012-to ensure safe voltage conversion on all address, control, and data lines.
What is the function of pin 28 on the IDT71V416VS15PHGI SOJ package?
Pin 28 on the IDT71V416VS15PHGI SOJ package is designated NC* (No Connect, optional VSS). Per the official datasheet, it may be left unconnected or tied to VSS (ground) at the PCB level. Connecting it to VSS improves grounding integrity in high-noise environments but is not required for basic functionality. No internal circuitry connects to this pin, and leaving it floating poses no reliability risk.
How does the byte enable architecture of the IDT71V416VS15PHGI improve system efficiency?
The IDT71V416VS15PHGI's independent BHE and BLE inputs allow selective 8-bit writes to the upper (I/O8–I/O15) or lower (I/O0–I/O7) byte without reading-modify-write sequences. In microcontroller-based systems, this eliminates software overhead for updating individual register fields or protocol headers-reducing bus traffic by up to 50% compared to full-word writes and improving real-time determinism in interrupt-driven I/O handlers.
IDT71V416VS15PHGI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TSOP II
IDT71V416VS15PHGI FAQ
1.How can I place an order for IDT71V416VS15PHGI through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT71V416VS15PHGI 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 IDT71V416VS15PHGI reliable?
The price and inventory of IDT71V416VS15PHGI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT71V416VS15PHGI is usually 5 days.
3.What payment methods are accepted for IDT71V416VS15PHGI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT71V416VS15PHGI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT71V416VS15PHGI?
IDT71V416VS15PHGI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT71V416VS15PHGI 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 IDT71V416VS15PHGI?
For technical support, including IDT71V416VS15PHGI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT71V416VS15PHGI requirements.
6.How does Aetrix verify that IDT71V416VS15PHGI is sourced from the original manufacturer or authorized distributors?
All IDT71V416VS15PHGI 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 IDT71V416VS15PHGI meets industry standards.
7.What is the process for return or replacement of IDT71V416VS15PHGI?
All IDT71V416VS15PHGI units undergo pre-shipment inspection (PSI). If there is an issue with IDT71V416VS15PHGI, 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 IDT71V416VS15PHGI part is unused and in its original packaging.
Return procedure for IDT71V416VS15PHGI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT71V416VS15PHGI Tags
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