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

Renesas 72V235L10TFG

Name: 72V235L10TFG
Brand: Renesas
SKU: 72V235L10TFG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 72V235L10TFG

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 64-LQFP

Datasheet:: 72V235L10TFG.pdf

Description:: IC FIFO SYNC 2KX18 6.5NS 64TQFP

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Product details

Overview

72V235L10TFG from Integrated Device Technology (IDT) is a 3.3 V, 2,048 × 18-bit synchronous FIFO memory IC with dual-clock operation, 10 ns read/write cycle time, and industrial temperature range (–40°C to +85°C). It supports IDT Standard and First Word Fall-Through (FWFT) timing modes, programmable Almost-Empty/Almost-Full flags, and is used in optical disk controllers, LAN interfaces, and interprocessor communication buffers.

For engineers reviewing the 72V235L10TFG datasheet, 72V235L10TFG pinout, 72V235L10TFG application, or 72V235L10TFG equivalent, key selection criteria include its 2,048-word depth, 18-bit bus width, 10 ns timing grade, TQFP-64 package, and configurable flag synchronization mode - all critical for deterministic data buffering in high-speed digital systems.

Technical Context

The 72V235L10TFG implements a clocked, dual-port RAM array with independent read (RCLK/REN) and write (WCLK/WEN) control paths, enabling asynchronous or coincident clock operation. Its flag logic supports both single/double register-buffered EF/FF outputs and programmable PAE/PAF offsets loaded via D0–D11 during LD assertion.

Timing mode (IDT Standard vs FWFT) and flag synchronization (asynchronous/synchronous) are configured at reset using FL, RXI, and WXI pins per Table 3. The device delivers deterministic latency: tA = 6.5 ns (max), tOE = 6 ns (max), and tWFF/tREF ≤ 6.5 ns - verified under industrial conditions (VCC = 3.3 V ± 0.3 V, TA = –40°C to +85°C).

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Depth × Width	2,048 × 18-bit - provides 36,864 bits of deterministic first-in-first-out buffering for burst-mode data streams.
Cycle Time	10 ns - enables 100 MHz clock operation, supporting high-throughput interfaces like SCSI and PCI bridge buffers.
Supply Voltage	3.3 V ± 0.3 V - compatible with modern low-voltage logic families and reduces power vs 5 V FIFOs.
Operating Temperature	–40°C to +85°C - qualified for industrial embedded systems including motor drives and network edge equipment.
Input Tolerance	5 V tolerant - allows direct interfacing with legacy 5 V controllers without level-shifting circuitry.
Package	64-pin TQFP (TF suffix) - surface-mount footprint with 0.5 mm pitch, optimized for automated PCB assembly.
Flag Configuration	Programmable PAE/PAF offsets + selectable synchronous/asynchronous timing - enables precise buffer watermarking for real-time flow control.

Pinout & Package

72V235L10TFG is housed in a 64-lead thin quad flatpack (TQFP) with 0.5 mm lead pitch, compliant with JEDEC MO-159AB. The package includes seven GND pins and two VCC pins for low-noise power distribution.

Pin/Terminal	Circuit Role	Design Meaning
D0–D17	Data Input Bus	18-bit parallel input path; accepts data on WCLK rising edge when WEN = LOW.
Q0–Q17	Data Output Bus	18-bit parallel output path; three-state controlled by OE; outputs valid after RCLK edge (IDT Standard) or automatically (FWFT).
WCLK / RCLK	Independent Clock Inputs	Asynchronous or coincident clocks; skew tolerance tSKEW1 = 5 ns (min) ensures reliable dual-clock domain crossing.
WEN / REN	Write/Read Enable Controls	Active-LOW enables; inhibit writes when FF = LOW, reads when EF/OR = LOW - prevents under/overflow.
EF/OR, FF/IR	Fixed Status Flags	EF (empty) / OR (output ready) and FF (full) / IR (input ready) provide immediate buffer state feedback without polling.
PAE / PAF	Programmable Threshold Flags	Assert when FIFO reaches user-defined near-empty/near-full levels; default offsets: PAE = 127, PAF = 127 words from boundary.
LD / FL / WXI / RXI	Configuration & Expansion Control	Set timing mode (Standard/FWFT), flag sync type, and enable daisy-chain depth expansion via WXO/RXO.
OE	Output Enable	Active-LOW places Q0–Q17 in high-impedance state - essential for shared-bus architectures.

Key Features

Feature	Design Value
First Word Fall-Through (FWFT) mode	Delivers first written word to outputs after three RCLK edges without requiring REN assertion - eliminates initial read latency in streaming applications.
Configurable flag synchronization	PAE/PAF can be set to update on RCLK/WCLK edges (synchronous) or toggle asynchronously - enables precise timing alignment with system clock domains.
Register-buffered flag outputs	Selectable single/double/triple buffering for EF/FF/IR/OR - suppresses metastability during boundary transitions (e.g., empty→non-empty) at cost of 1–2 clock-cycle flag delay.
Depth/width expandability	Supports daisy-chain depth expansion using WXO/RXO pins and FL pin strapping - scales capacity beyond 2,048 words without external logic.
5 V-tolerant inputs	Accepts 0–5 V input signals while operating at 3.3 V - simplifies integration with mixed-voltage systems and legacy controllers.

Applications

Optical Disk Controller Buffer	Industrial Ethernet Switch Interface
Use Scenario: Buffers bursty ATAPI/SCSI command and data transfers between host controller and optical drive ASIC. IC Role / Device Role / Timing Role: Synchronous FIFO decouples mismatched read/write clock domains (host CPU vs drive motor control) and absorbs jitter. Use Value: 10 ns cycle time and FWFT mode ensure zero-latency startup of data streaming; 2,048-word depth accommodates maximum CD/DVD sector bursts.	Use Scenario: Isolates MAC-layer packet processing from PHY-level serialization in managed industrial switches. IC Role / Device Role / Timing Role: Dual-clock FIFO bridges 125 MHz GMII clock domain and variable-rate packet scheduler clock. Use Value: Programmable PAF/PAE flags trigger early packet discard or flow control before buffer overflow, maintaining deterministic latency under congestion.
Multi-Processor Communication Link	Motion Control System Data Pipeline
Use Scenario: Mediates high-speed data exchange between DSP and FPGA in radar signal processing subsystems. IC Role / Device Role / Timing Role: Acts as a handshake-free, depth-configurable data conduit with deterministic read/write timing. Use Value: 18-bit bus width matches common DSP data paths; 5 V-tolerant inputs interface directly with FPGA I/O banks without level shifters.	Use Scenario: Buffers position/velocity commands between motion controller and servo drive in CNC machinery. IC Role / Device Role / Timing Role: Provides jitter-free command queuing with guaranteed delivery timing across isolated power domains. Use Value: Industrial temperature rating (–40°C to +85°C) and robust flag logic ensure reliable operation in thermally demanding factory environments.

Optical Disk Controller Buffer

Industrial Ethernet Switch Interface

Use Scenario: Buffers bursty ATAPI/SCSI command and data transfers between host controller and optical drive ASIC.

IC Role / Device Role / Timing Role: Synchronous FIFO decouples mismatched read/write clock domains (host CPU vs drive motor control) and absorbs jitter.

Use Value: 10 ns cycle time and FWFT mode ensure zero-latency startup of data streaming; 2,048-word depth accommodates maximum CD/DVD sector bursts.

Use Scenario: Isolates MAC-layer packet processing from PHY-level serialization in managed industrial switches.

IC Role / Device Role / Timing Role: Dual-clock FIFO bridges 125 MHz GMII clock domain and variable-rate packet scheduler clock.

Use Value: Programmable PAF/PAE flags trigger early packet discard or flow control before buffer overflow, maintaining deterministic latency under congestion.

Multi-Processor Communication Link

Motion Control System Data Pipeline

Use Scenario: Mediates high-speed data exchange between DSP and FPGA in radar signal processing subsystems.

IC Role / Device Role / Timing Role: Acts as a handshake-free, depth-configurable data conduit with deterministic read/write timing.

Use Value: 18-bit bus width matches common DSP data paths; 5 V-tolerant inputs interface directly with FPGA I/O banks without level shifters.

Use Scenario: Buffers position/velocity commands between motion controller and servo drive in CNC machinery.

IC Role / Device Role / Timing Role: Provides jitter-free command queuing with guaranteed delivery timing across isolated power domains.

Use Value: Industrial temperature rating (–40°C to +85°C) and robust flag logic ensure reliable operation in thermally demanding factory environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
72V235L15TFG	15 ns cycle time (vs 10 ns); identical 2,048 × 18 organization, TQFP-64 package, and feature set.	Suitable where 66.7 MHz max clock frequency suffices; lower power consumption at reduced speed.	Select 72V235L10TFG when system timing budget requires ≤10 ns access or ≥100 MHz operation.
72V225L10TFG	1,024 × 18-bit depth (half capacity); same 10 ns timing, 3.3 V supply, and TQFP-64 package.	Fits space-constrained designs with smaller buffering needs; lower pin-count footprint not applicable (same package).	Choose 72V235L10TFG when application requires >1,024-word depth - e.g., multi-sector disk buffering or deep packet queues.

Compared with 72V235L15TFG and 72V225L10TFG, the 72V235L10TFG uniquely balances maximum depth (2,048 words), fastest timing (10 ns), and industrial temperature support - making it optimal for latency-critical, high-capacity buffering where both speed and capacity are non-negotiable.

Availability

72V235L10TFG is available at Aetrix Electronics and suitable for optical storage controllers, industrial Ethernet interfaces, multi-processor interconnects, and motion control systems requiring stable component supply and long-term industrial-grade availability.

Supply support for 72V235L10TFG 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions, acquired by Renesas Electronics in 2019.

The IDT72V2xx5 family was designed specifically for high-reliability, low-latency data buffering in industrial and communications infrastructure - emphasizing deterministic timing, flexible flag control, and mixed-voltage interoperability.

FAQ

What is the memory organization and speed grade of the 72V235L10TFG?

The 72V235L10TFG is a 2,048 × 18-bit synchronous FIFO with a 10 ns read/write cycle time, supporting up to 100 MHz clock operation. It operates from a 3.3 V supply and is rated for the industrial temperature range (–40°C to +85°C). This configuration is explicitly confirmed in the IDT datasheet DSC-4294/8 for the 72V235L10TFG variant.

Does the 72V235L10TFG support both IDT Standard and First Word Fall-Through (FWFT) timing modes?

Yes, the 72V235L10TFG supports both timing modes. Mode selection occurs at reset using the FL, RXI, and WXI pin states per Table 3 in the datasheet. In FWFT mode, the first written word appears on Q0–Q17 after three RCLK edges without requiring REN assertion - a behavior confirmed for the 72V235L10TFG in functional description Section 6.

How are the Almost-Empty and Almost-Full flags configured on the 72V235L10TFG?

The 72V235L10TFG features programmable PAE and PAF flags with default offsets of 127 words from empty/full boundaries. Offsets are loaded via D0–D11 during LD assertion with WEN LOW, and timing (synchronous/asynchronous) is selected at reset. This capability is documented in Sections 3 (Pin Description) and 6 (Functional Description) of the datasheet.

What package type and pin count does the 72V235L10TFG use?

The 72V235L10TFG uses a 64-pin thin quad flatpack (TQFP) package, designated by the "TF" suffix in the part number. Pin configuration and thermal/mechanical dimensions match JEDEC MO-159AB, with seven GND and two VCC pins for noise reduction - as shown in the top-view diagram on page 2 of the datasheet.

Can the 72V235L10TFG be used in depth-expansion configurations?

Yes, the 72V235L10TFG supports daisy-chain depth expansion using WXO/RXO pins and FL pin strapping. In such configurations, FL is grounded on the first device and pulled HIGH on subsequent devices, enabling scalable FIFO capacity beyond 2,048 words. This functionality is detailed in Sections 2 (Pin Configurations) and 6 (Functional Description) of the datasheet.

72V235L10TFG Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 72V

Package/Case:: 64-LQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Size:: 36K (2K x 18)

Function:: Synchronous

Data Rate:: 100MHz

Access Time:: 6.5ns

Voltage - Supply:: 3 V ~ 3.6 V

Current - Supply (Max):: 30mA

Bus Directional:: Uni-Directional

Expansion Type:: Depth, Width

Programmable Flags Support:: Yes

Retransmit Capability:: No

FWFT Support:: Yes

Operating Temperature:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Supplier Device Package:: 64-TQFP (10x10)

72V235L10TFG FAQ

1.How can I place an order for 72V235L10TFG through Aetrix?

Please submit a Request for Quotation (RFQ) for 72V235L10TFG 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 72V235L10TFG reliable?

The price and inventory of 72V235L10TFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V235L10TFG is usually 5 days.

3.What payment methods are accepted for 72V235L10TFG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V235L10TFG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 72V235L10TFG?

72V235L10TFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 72V235L10TFG 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 72V235L10TFG?

For technical support, including 72V235L10TFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V235L10TFG requirements.

6.How does Aetrix verify that 72V235L10TFG is sourced from the original manufacturer or authorized distributors?

All 72V235L10TFG 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 72V235L10TFG meets industry standards.

7.What is the process for return or replacement of 72V235L10TFG?

All 72V235L10TFG units undergo pre-shipment inspection (PSI). If there is an issue with 72V235L10TFG, 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 72V235L10TFG part is unused and in its original packaging.

Return procedure for 72V235L10TFG:

1.Submit a request within 90 days.

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

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