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Home > Products > Integrated Circuits (ICs) > Logic > FIFOs Memory

Renesas 72V231L15PFI

Name: 72V231L15PFI
Brand: Renesas
SKU: 72V231L15PFI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 72V231L15PFI

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 32-LQFP

Datasheet:: 72V231L15PFI.pdf

Description:: IC FIFO SYNC 2KX9 10NS 32TQFP

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Product details

Overview

IDT72V231L15PFI from Integrated Device Technology (IDT) is a 3.3 V CMOS Synchronous FIFO memory with 2,048 × 9-bit depth, 10 ns read/write cycle time, and dual-clock operation support. It features programmable Almost-Empty/Almost-Full flags, 9-bit parallel I/O, and industrial temperature range (–40°C to +85°C). Used in interprocessor communication, LAN buffering, and graphics subsystems requiring deterministic latency and zero fall-through time.

For engineers reviewing the IDT72V231L15PFI datasheet, IDT72V231L15PFI pinout, IDT72V231L15PFI application, or IDT72V231L15PFI equivalent, key selection criteria include 2,048-word depth, 9-bit bus width, 10 ns timing, programmable flag offset loading via WEN2/LD, and compatibility with 3.3 V systems with 5 V-tolerant inputs.

Technical Context

This device implements a dual-ported, zero fall-through time architecture with independent read (RCLK/REN1/REN2) and write (WCLK/WEN1/WEN2-LD) clock domains. Its internal RAM array is synchronized to respective clocks: FF and PAF are edge-triggered on WCLK; EF and PAE on RCLK. The WEN2/LD pin configures either dual-write-enable mode (for depth expansion) or programmable flag offset register access at reset.

Flag logic includes fixed Empty (EF) and Full (FF), plus two user-programmable flags-PAE and PAF-with default offsets of Empty+7 and Full−7. Offset registers are 8-bit wide and loaded sequentially over four WCLK edges when WEN2/LD is held LOW post-reset. All control signals are CMOS-compatible with VIH = 2.0 V min and VIL = 0.8 V max.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Depth	2,048 × 9-bit words - supports mid-size data buffering without external chaining.
Access Time	6.5 ns (tA) - enables 100 MHz clock operation in high-speed synchronous interfaces.
Supply Voltage	3.0 V to 3.6 V - compatible with standard 3.3 V logic rails; 5 V input tolerant on all control/data pins.
Clock Cycle Time	15 ns (tCLK) - defines maximum operating frequency of 66.7 MHz for both read and write paths.
Programmable Flags	PAE and PAF with configurable 8-bit offsets - allows precise buffer-level signaling for system flow control.
Operating Temperature	–40°C to +85°C - qualified for industrial environments including factory automation and telecom infrastructure.
Package	32-pin TQFP (PF) - surface-mount, RoHS-compliant, 7 mm × 7 mm footprint with 0.8 mm pitch.

Pinout & Package

Package: 32-pin plastic Thin Quad FlatPack (TQFP), order code PF, JEDEC MO-220, 7 mm × 7 mm body, 0.8 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
D0–D8	Data Inputs	9-bit parallel write data bus; accepts 5 V-tolerant TTL/CMOS levels.
Q0–Q8	Data Outputs	9-bit parallel read data bus; three-state controlled by OE.
WCLK	Write Clock	LOW-to-HIGH edge triggers write; FF and PAF synchronized to this edge.
RCLK	Read Clock	LOW-to-HIGH edge triggers read; EF and PAE synchronized to this edge.
WEN1	Write Enable 1	Primary write gate; must be LOW (with WEN2/LD HIGH) for write in dual-enable mode.
WEN2/LD	Write Enable 2 / Load	Configurable pin: HIGH at reset → second write enable; LOW at reset → offset register load/control.
REN1, REN2	Read Enables	Both must be LOW for valid read; REN2 may be grounded in single-enable configurations.
OE	Output Enable	Active LOW; places Q0–Q8 in high-impedance state when HIGH.
RS	Reset	Asynchronous active LOW; initializes pointers, flags, and offset registers to defaults.
EF, FF	Status Flags	EF = HIGH when not empty; FF = HIGH when not full; both synchronized to respective clocks.
PAE, PAF	Programmable Flags	PAE = LOW when almost-empty (offset-configurable); PAF = LOW when almost-full; clock-synchronized.
VCC, GND	Power	Single 3.3 V supply (3.0–3.6 V); decoupling required per high-speed CMOS practice.

Key Features

Feature	Design Value
Dual-clock domain operation	Enables asynchronous data transfer between independent clock domains (e.g., CPU ↔ peripheral) without metastability risk in flag outputs.
Programmable flag offset registers	Four 8-bit registers (Empty LSB/MSB, Full LSB/MSB) allow runtime adjustment of PAE/PAF thresholds for adaptive buffer management.
Zero fall-through time architecture	Guarantees no data loss during simultaneous read/write at boundary conditions; critical for real-time packet buffering.
5 V input tolerance	Permits direct interface with legacy 5 V logic without level shifters, reducing BOM count and layout complexity.
Industrial temperature qualification	Validated across –40°C to +85°C, supporting deployment in uncontrolled environments like base stations and motor drives.

Applications

Interprocessor Communication	Local Area Network Buffering
Use Scenario: Bidirectional data exchange between two microcontrollers running at different clock frequencies. IC Role / Device Role / Timing Role: Synchronous FIFO acting as elastic buffer to absorb clock domain skew and prevent overrun/underrun. Use Value: Eliminates need for handshaking protocols; deterministic 10 ns latency enables predictable throughput up to 66.7 MB/s (9-bit × 66.7 MHz).	Use Scenario: Temporary storage of Ethernet MAC-layer frames before DMA transfer to host memory. IC Role / Device Role / Timing Role: High-speed 2,048-word staging buffer isolating PHY timing from host controller jitter. Use Value: Absorbs bursty traffic; programmable PAF triggers early DMA request, minimizing frame loss under congestion.
Graphics Subsystem Data Pipeline	Industrial Motion Control Interface
Use Scenario: Pixel data buffering between display controller and FPGA-based scaler/compositor. IC Role / Device Role / Timing Role: Clock-domain crossing bridge synchronizing 100 MHz pixel clock to 50 MHz processing clock. Use Value: Zero fall-through design prevents visual artifacts; 9-bit width matches common RGB565 or YUV422 data paths.	Use Scenario: Real-time command queue between PLC and servo drive, where jitter must be <100 ns. IC Role / Device Role / Timing Role: Deterministic latency FIFO ensuring motion commands execute in strict sequence and timing. Use Value: Fixed 10 ns tA and tCLK=15 ns guarantee worst-case delay bounded to one clock cycle; EF/FF flags enable cycle-accurate status polling.

Interprocessor Communication

Local Area Network Buffering

Use Scenario: Bidirectional data exchange between two microcontrollers running at different clock frequencies.

IC Role / Device Role / Timing Role: Synchronous FIFO acting as elastic buffer to absorb clock domain skew and prevent overrun/underrun.

Use Value: Eliminates need for handshaking protocols; deterministic 10 ns latency enables predictable throughput up to 66.7 MB/s (9-bit × 66.7 MHz).

Use Scenario: Temporary storage of Ethernet MAC-layer frames before DMA transfer to host memory.

IC Role / Device Role / Timing Role: High-speed 2,048-word staging buffer isolating PHY timing from host controller jitter.

Use Value: Absorbs bursty traffic; programmable PAF triggers early DMA request, minimizing frame loss under congestion.

Graphics Subsystem Data Pipeline

Industrial Motion Control Interface

Use Scenario: Pixel data buffering between display controller and FPGA-based scaler/compositor.

IC Role / Device Role / Timing Role: Clock-domain crossing bridge synchronizing 100 MHz pixel clock to 50 MHz processing clock.

Use Value: Zero fall-through design prevents visual artifacts; 9-bit width matches common RGB565 or YUV422 data paths.

Use Scenario: Real-time command queue between PLC and servo drive, where jitter must be <100 ns.

IC Role / Device Role / Timing Role: Deterministic latency FIFO ensuring motion commands execute in strict sequence and timing.

Use Value: Fixed 10 ns tA and tCLK=15 ns guarantee worst-case delay bounded to one clock cycle; EF/FF flags enable cycle-accurate status polling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous FIFO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT72V231L10PFI	10 ns cycle time (vs. 15 ns); higher ICC1 (20 mA typical vs. 15 mA)	Supports 100 MHz operation; requires tighter power delivery and thermal margin	Select when system clock >66.7 MHz and latency budget <10 ns is mandatory
ICS72V231L15PFI	Same pinout and electrical specs; manufactured by IDT after acquisition by Renesas; identical AC/DC parameters	No functional or layout change required; long-term supply continuity assured	Preferred for new designs seeking extended lifecycle support and consolidated sourcing

Compared with IDT72V231L15PFI, the L10 variant trades lower latency for higher power and stricter timing margins, while the ICS72V231L15PFI offers identical performance with enhanced supply chain resilience-making it the recommended drop-in replacement for future-proofing.

Availability

IDT72V231L15PFI is available at Aetrix Electronics and suitable for interprocessor communication, LAN buffering, and industrial motion control applications requiring stable component supply, industrial temperature operation, and deterministic FIFO latency.

Supply support for IDT72V231L15PFI 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, Inc. (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions, acquired by Renesas Electronics in 2019.

IDT72V231L15PFI belongs to the SyncFIFO™ family-designed specifically for high-reliability, low-latency data buffering in mixed-clock-domain systems such as networking, graphics, and real-time control.

FAQ

What is the memory organization of the IDT72V231L15PFI?

The IDT72V231L15PFI features a 2,048 × 9-bit synchronous FIFO memory array. This means it stores 2,048 words, each 9 bits wide, providing 18,432 bits of total storage. The architecture supports independent read and write ports with zero fall-through time, making it suitable for applications requiring reliable, high-speed data buffering without data corruption at boundary conditions.

Does the IDT72V231L15PFI support dual-clock operation?

Yes, the IDT72V231L15PFI fully supports dual-clock operation: WCLK controls write timing and flag updates (FF, PAF), while RCLK controls read timing and flag updates (EF, PAE). The clocks may run asynchronously, and internal synchronization logic ensures safe cross-domain flag assertion-enabling robust use in clock-domain crossing scenarios without external handshake logic.

How are the programmable Almost-Empty and Almost-Full flags configured on the IDT72V231L15PFI?

The IDT72V231L15PFI uses the WEN2/LD pin in conjunction with WEN1 and WCLK to load 8-bit offset values into internal registers. When WEN2/LD is held LOW at reset, it enters offset programming mode: four consecutive WCLK edges write Empty LSB, Empty MSB, Full LSB, and Full MSB. Default offsets are 007H (7 decimal), yielding PAE = Empty+7 and PAF = Full−7.

What package type is used for the IDT72V231L15PFI?

The IDT72V231L15PFI is packaged in a 32-pin plastic Thin Quad FlatPack (TQFP), order code PF. It measures 7 mm × 7 mm with 0.8 mm lead pitch, complies with RoHS, and is rated for industrial temperature operation (–40°C to +85°C). This package supports automated assembly and provides adequate thermal dissipation for its 20 mA max active current.

Is the IDT72V231L15PFI obsolete or recommended for new designs?

The IDT72V231L15PFI is not marked obsolete in current Renesas documentation and remains actively supported under the ICS72V231L15PFI designation. While the original IDT datasheet notes "NOT RECOMMENDED FOR NEW DESIGNS" for the broader SyncFIFO family, Renesas continues to manufacture and distribute this part with full datasheet compliance, making IDT72V231L15PFI viable for new industrial designs with appropriate lifecycle planning.

72V231L15PFI Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 72V

Package/Case:: 32-LQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Size:: 18K (2K x 9)

Function:: Synchronous

Data Rate:: 66.7MHz

Access Time:: 10ns

Voltage - Supply:: 3 V ~ 3.6 V

Current - Supply (Max):: 20mA

Bus Directional:: Uni-Directional

Expansion Type:: Depth, Width

Programmable Flags Support:: Yes

Retransmit Capability:: No

FWFT Support:: No

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 32-TQFP (7x7)

72V231L15PFI FAQ

1.How can I place an order for 72V231L15PFI through Aetrix?

Please submit a Request for Quotation (RFQ) for 72V231L15PFI 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 72V231L15PFI reliable?

The price and inventory of 72V231L15PFI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V231L15PFI is usually 5 days.

3.What payment methods are accepted for 72V231L15PFI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V231L15PFI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 72V231L15PFI?

72V231L15PFI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 72V231L15PFI 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 72V231L15PFI?

For technical support, including 72V231L15PFI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V231L15PFI requirements.

6.How does Aetrix verify that 72V231L15PFI is sourced from the original manufacturer or authorized distributors?

All 72V231L15PFI 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 72V231L15PFI meets industry standards.

7.What is the process for return or replacement of 72V231L15PFI?

All 72V231L15PFI units undergo pre-shipment inspection (PSI). If there is an issue with 72V231L15PFI, 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 72V231L15PFI part is unused and in its original packaging.

Return procedure for 72V231L15PFI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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