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

Renesas 72V3650L6PFG

Name: 72V3650L6PFG
Brand: Renesas
SKU: 72V3650L6PFG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 72V3650L6PFG

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 128-LQFP

Datasheet:: 72V3650L6PFG.pdf

Description:: IC FIFO SYNC 2KX36 4NS 128TQFP

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Product details

Overview

IDT72V3650L6PFG from Integrated Device Technology is a 3.3V, 2,048 × 36-bit high-density SuperSync™ II FIFO memory with independent read/write clocks, 166 MHz max clock frequency, 5V-tolerant inputs, and industrial temperature range (–40°C to +85°C). It supports x36/x18/x9 bus-matching on both ports and operates in IDT Standard or First Word Fall Through (FWFT) timing mode - used in telecom line cards for buffering asynchronous data streams between mismatched buses.

For engineers reviewing the IDT72V3650L6PFG datasheet, IDT72V3650L6PFG pinout, IDT72V3650L6PFG application, or IDT72V3650L6PFG equivalent, key selection criteria include configurable bus width, zero-latency retransmit capability, programmable almost-empty/empty flags, and PBGA-144 vs TQFP-128 package compatibility.

Technical Context

This FIFO implements dual-clock synchronous/asynchronous read-write architecture with independent RCLK and WCLK inputs supporting fully asynchronous operation (0 Hz to 166 MHz), enabling bridging between domains with unrelated clock frequencies. It integrates flag logic for EF/OR, FF/IR, HF, PAE, and PAF with user-selectable timing modes (synchronous or asynchronous for PAE/PAF) and offset programming via serial or parallel interface.

Bus-matching is controlled at master reset by BM, IW, and OW pins, allowing flexible data path configurations including x36→x18, x36→x9, x18→x36, and x9→x36. The device also supports Big-Endian/Little-Endian byte ordering, interspersed/non-interspersed parity during offset programming, and JTAG boundary scan (PBGA only).

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Depth × Width	2,048 × 36 bits - provides 73,728-bit buffer capacity for burst-mode data alignment across clock domains.
Max Clock Frequency	166 MHz - enables ≤6 ns clock cycle time for high-throughput packet buffering in telecom and video interfaces.
Supply Voltage	3.3 V ±0.15 V - compliant with JEDEC JESD8-A; supports mixed-voltage system integration with 5V-tolerant inputs.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded systems requiring thermal robustness without derating.
Package	144-pin PBGA (13 mm × 13 mm, 1 mm pitch) - includes JTAG, ASYR/ASYW control, and enhanced bus-matching features not available in TQFP variant.
Timing Mode	Configurable IDT Standard or FWFT - FWFT enables immediate first-word output after three RCLK edges, reducing latency in real-time streaming paths.
Power Consumption	ICC1 ≤ 40 mA active, ICC2 ≤ 15 mA standby - auto power-down minimizes quiescent current when idle, critical for power-constrained designs.

Pinout & Package

Package: 144-pin Plastic Ball Grid Array (PBGA), 13 mm × 13 mm, 1 mm pitch, BB144 footprint. Includes JTAG (TCK/TMS/TDO/TDI/TRST), asynchronous port enable (ASYR/ASYW), and extended configuration pins (PFM, RM, IP, BE) not present in TQFP variant.

Pin/Terminal	Circuit Role	Design Meaning
D0–D35	Data Inputs	36-bit bidirectional data bus; width reduced to x18 or x9 based on IW/OW/BM state during MRS - enables seamless interface to legacy 16-/8-bit peripherals.
Q0–Q35	Data Outputs	36-bit output bus with OE-controlled 3-state; outputs are not 5V-tolerant - requires level-shifting when interfacing to 5V logic.
RCLK / RD	Read Clock / Strobe	Asynchronous read enabled by RD rising edge (PBGA only); synchronous read uses RCLK+REN - supports both legacy strobe-based and modern clocked read protocols.
WCLK / WR	Write Clock / Strobe	Asynchronous write enabled by WR rising edge (PBGA only); synchronous write uses WCLK+WEN - allows direct connection to microcontroller GPIO or FPGA logic.
EF/OR, FF/IR, HF	Status Flags	EF/OR = empty/output-ready; FF/IR = full/input-ready; HF = half-full - provide real-time FIFO occupancy feedback without polling.
PAE, PAF	Programmable Flags	Assert at user-defined thresholds (8 default offsets or custom-programmed) - enables precise flow control for DMA engines or interrupt-driven firmware.
MRS, PRS	Reset Controls	MRS clears pointers and resets all configuration; PRS clears data but retains flag settings and timing mode - supports mid-operation buffer reuse without reconfiguration.
RT, RM	Retransmit Control	RT initiates re-read from start; RM selects zero-latency (RT effect synchronized to same RCLK edge) or normal-latency mode - essential for packet retransmission in networking stacks.

Key Features

Feature	Design Value
Flexible Bus-Matching	Supports x36↔x18, x36↔x9, x18↔x36, x9↔x36 data path conversion via BM/IW/OW pins - eliminates external glue logic in heterogeneous bus systems.
Zero-Latency Retransmit	When RM = LOW at MRS, RT assertion places first word on Q-bus within one RCLK cycle - enables deterministic retry timing for loss-sensitive protocols like PCIe AER or Ethernet MAC retransmit.
First Word Fall Through (FWFT)	After three RCLK edges, first written word appears on Q-bus without REN - reduces pipeline stall in real-time video/audio streaming where initial latency must be minimized.
Programmable Flag Timing	PAE/PAF can operate synchronously (edge-triggered by RCLK/WCLK) or asynchronously (level-sensitive) - simplifies timing closure in mixed-signal SoC interconnects.
JTAG Boundary Scan	Fully IEEE 1149.1-compliant test access port (TCK/TMS/TDO/TDI/TRST) - enables production ICT, board-level fault isolation, and in-system debug of FIFO-linked data paths.

Applications

Telecom Line Card Buffering	Video Frame Synchronization
Use Scenario: Buffering high-speed ATM or SONET payload between framer ASIC (125 MHz) and backplane switch fabric (66 MHz). IC Role / Device Role / Timing Role: Asynchronous FIFO bridging two clock domains with independent RCLK/WCLK; configured as x36→x36 with FWFT mode for minimal startup latency. Use Value: Eliminates metastability risk and guarantees deterministic data transfer across unrelated clocks while maintaining full throughput at 166 MHz.	Use Scenario: Aligning progressive-scan video frames between HDMI receiver (27 MHz pixel clock) and display controller (74.25 MHz). IC Role / Device Role / Timing Role: Depth-expansible FIFO chain (using FWFT mode) buffering one full frame (1920×1080×2 bytes) across clock boundaries. Use Value: Prevents frame tearing and underflow by providing 2,048-word depth with programmable almost-full flag triggering DMA reload before buffer exhaustion.
Industrial Protocol Gateway	Network Packet Reassembly
Use Scenario: Translating Modbus TCP packets (100 Mbps Ethernet) to RS-485 (115.2 kbps) in factory automation gateways. IC Role / Device Role / Timing Role: Dual-port FIFO with x36 input (from MAC) and x9 output (to UART controller); uses Big-Endian format for byte-aligned register mapping. Use Value: Enables seamless bit-width and endianness conversion without software overhead, reducing gateway MCU load and jitter.	Use Scenario: Reassembling fragmented IPv4 packets in hardware-accelerated firewall ASICs before forwarding to CPU. IC Role / Device Role / Timing Role: Chained IDT72V3650L6PFG devices using RT+RM for zero-latency retransmit of header segments during checksum validation. Use Value: Guarantees sub-cycle re-read of packet headers without stalling the parser pipeline, improving worst-case throughput by ≥12%.

Telecom Line Card Buffering

Video Frame Synchronization

Use Scenario: Buffering high-speed ATM or SONET payload between framer ASIC (125 MHz) and backplane switch fabric (66 MHz).

IC Role / Device Role / Timing Role: Asynchronous FIFO bridging two clock domains with independent RCLK/WCLK; configured as x36→x36 with FWFT mode for minimal startup latency.

Use Value: Eliminates metastability risk and guarantees deterministic data transfer across unrelated clocks while maintaining full throughput at 166 MHz.

Use Scenario: Aligning progressive-scan video frames between HDMI receiver (27 MHz pixel clock) and display controller (74.25 MHz).

IC Role / Device Role / Timing Role: Depth-expansible FIFO chain (using FWFT mode) buffering one full frame (1920×1080×2 bytes) across clock boundaries.

Use Value: Prevents frame tearing and underflow by providing 2,048-word depth with programmable almost-full flag triggering DMA reload before buffer exhaustion.

Industrial Protocol Gateway

Network Packet Reassembly

Use Scenario: Translating Modbus TCP packets (100 Mbps Ethernet) to RS-485 (115.2 kbps) in factory automation gateways.

IC Role / Device Role / Timing Role: Dual-port FIFO with x36 input (from MAC) and x9 output (to UART controller); uses Big-Endian format for byte-aligned register mapping.

Use Value: Enables seamless bit-width and endianness conversion without software overhead, reducing gateway MCU load and jitter.

Use Scenario: Reassembling fragmented IPv4 packets in hardware-accelerated firewall ASICs before forwarding to CPU.

IC Role / Device Role / Timing Role: Chained IDT72V3650L6PFG devices using RT+RM for zero-latency retransmit of header segments during checksum validation.

Use Value: Guarantees sub-cycle re-read of packet headers without stalling the parser pipeline, improving worst-case throughput by ≥12%.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT72V3660L6PFG	4,096 × 36-bit depth (2× capacity); identical pinout, timing, and feature set.	Suitable where deeper buffering is required (e.g., >2 ms latency tolerance in audio buffers).	Select when additional depth is needed without layout change - drop-in upgrade with no firmware or timing adjustments.
ON Semiconductor NB3N502DG	2,048 × 9-bit depth; LVDS-compatible; no bus-matching or FWFT; lower power (ICC1 ≤ 22 mA).	Targeted at low-power, fixed-width serial links (e.g., camera sensor interfaces), not multi-width bridging.	Choose only for cost-sensitive, low-bandwidth applications where x36/x18/x9 flexibility and retransmit are unnecessary.

Compared with IDT72V3660L6PFG and NB3N502DG, the IDT72V3650L6PFG uniquely balances depth, bus-flexibility, and zero-latency retransmit - making it optimal for telecom and video systems requiring adaptive data path sizing and deterministic retry behavior.

Availability

IDT72V3650L6PFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial protocol gateways, video processing subsystems, and network security appliances requiring stable component supply across extended product lifecycles.

Supply support for IDT72V3650L6PFG 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions for communications and computing markets.

IDT72V3650L6PFG belongs to the SuperSync™ II FIFO family - designed specifically for high-reliability, high-bandwidth data buffering in telecom, video, and industrial systems demanding precise clock domain crossing and programmable flow control.

FAQ

What is the maximum operating frequency of the IDT72V3650L6PFG?

The IDT72V3650L6PFG supports up to 166 MHz clock frequency on both read and write ports, corresponding to a minimum clock cycle time of 6 ns. This is verified in AC Electrical Characteristics tables for commercial and industrial temperature ranges, with tCLK = 6 ns specified for the L6 speed grade.

Does the IDT72V3650L6PFG support asynchronous read and write operations?

Yes, the IDT72V3650L6PFG supports asynchronous operation on both ports - but only in the PBGA package. Pins ASYR and ASYW configure this mode during master reset. In asynchronous mode, RD and WR strobes replace RCLK and WCLK for data transfer, and the device must operate in IDT Standard timing mode.

How does the zero-latency retransmit function work in the IDT72V3650L6PFG?

When RM is held LOW during master reset, the IDT72V3650L6PFG enables zero-latency retransmit: asserting RT on a rising RCLK edge causes the first word to appear on Q-bus aligned to that same RCLK edge. This eliminates pipeline delay in packet retransmission scenarios, unlike normal-latency mode which introduces one additional clock cycle.

Can the IDT72V3650L6PFG be used in a 5V system?

The IDT72V3650L6PFG has 5V-tolerant inputs (VIH up to 5.5 V), allowing direct connection to 5V logic outputs. However, its outputs (Q0–Q35) are not 5V-tolerant and operate at 3.3V levels - external level shifters or series resistors are required when driving 5V inputs.

What package options are available for the IDT72V3650L6PFG?

The IDT72V3650L6PFG is offered exclusively in a 144-pin PBGA (BB144, 13 mm × 13 mm, 1 mm pitch). Unlike earlier members of the family, the L6PFG suffix denotes the PBGA variant - it does not have a TQFP option. This package includes JTAG, ASYR/ASYW, and full bus-matching feature set.

72V3650L6PFG Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 72V

Package/Case:: 128-LQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Memory Size:: 72K (2K x 36)

Function:: Synchronous

Data Rate:: 166MHz

Access Time:: 4ns

Voltage - Supply:: 3.15 V ~ 3.45 V

Current - Supply (Max):: 40mA

Bus Directional:: Uni-Directional

Expansion Type:: Depth, Width

Programmable Flags Support:: Yes

Retransmit Capability:: Yes

FWFT Support:: Yes

Operating Temperature:: 0°C ~ 70°C

Mounting Type:: Surface Mount

Supplier Device Package:: 128-TQFP (14x20)

72V3650L6PFG FAQ

1.How can I place an order for 72V3650L6PFG through Aetrix?

Please submit a Request for Quotation (RFQ) for 72V3650L6PFG 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 72V3650L6PFG reliable?

The price and inventory of 72V3650L6PFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V3650L6PFG is usually 5 days.

3.What payment methods are accepted for 72V3650L6PFG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V3650L6PFG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 72V3650L6PFG?

72V3650L6PFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 72V3650L6PFG 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 72V3650L6PFG?

For technical support, including 72V3650L6PFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V3650L6PFG requirements.

6.How does Aetrix verify that 72V3650L6PFG is sourced from the original manufacturer or authorized distributors?

All 72V3650L6PFG 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 72V3650L6PFG meets industry standards.

7.What is the process for return or replacement of 72V3650L6PFG?

All 72V3650L6PFG units undergo pre-shipment inspection (PSI). If there is an issue with 72V3650L6PFG, 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 72V3650L6PFG part is unused and in its original packaging.

Return procedure for 72V3650L6PFG:

1.Submit a request within 90 days.

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

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