Renesas 72V253L6PFG

Overview

IDT72V253L6PFG from Integrated Device Technology is a 3.3 V, high-density SuperSync II™ narrow bus FIFO memory with 4,096 × 18 or 8,192 × 9 organization, supporting independent read/write clocks up to 166 MHz, 5 V-tolerant inputs, and programmable Almost-Empty/Almost-Full flags - deployed in telecom data buffering and video frame synchronization systems.

For engineers reviewing the IDT72V253L6PFG datasheet, IDT72V253L6PFG pinout, IDT72V253L6PFG application, or IDT72V253L6PFG equivalent, key selection criteria include x9/x18 bus-matching flexibility, zero-latency retransmit capability, FWFT vs. Standard timing mode configuration, and TQFP-80 packaging with industrial temperature support (–40°C to +85°C).

Technical Context

This FIFO implements dual-clock asynchronous operation with fully independent RCLK and WCLK domains - no frequency ratio constraints between clocks, eliminating legacy FS pin dependency. It supports both IDT Standard and First Word Fall Through (FWFT) timing modes, selectable via FWFT/SI during master reset.

The device integrates programmable flag logic (PAE/PAF) with eight default offset settings, configurable via FSEL0/FSEL1/LD or serial/parallel loading, and features auto power-down for standby current reduction. Bus-matching is controlled by IW/OW pins, enabling x9↔x18 width translation on input and output ports independently.

Key Specifications

Pinout & Package

Package: 80-pin Thin Quad Flat Pack (TQFP), PN80 footprint, lead finish SnPb (end-of-life as of June 15, 2018).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V255LA, IDT72V253L6PFG delivers higher speed and zero-latency retransmit for time-critical replay; compared with IDT72V263L6PFG, it provides optimal cost/depth balance for mid-range buffering where 8K+ depth is unnecessary.

Availability

IDT72V253L6PFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial protocol gateways, and video processing systems requiring stable component supply and long-term industrial temperature support.

Supply support for IDT72V253L6PFG 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 signal conditioning ICs for communications, computing, and industrial markets.

IDT72V253L6PFG belongs to the SuperSync II™ FIFO product line, engineered for high-speed, deep-buffer data flow control in multi-clock-domain systems such as network switches, video encoders, and protocol bridges.

FAQ

What memory configurations does the IDT72V253L6PFG support?

IDT72V253L6PFG supports two memory organizations: 4,096 × 18 bits or 8,192 × 9 bits. The selection is determined at master reset by the states of the IW (Input Width) and OW (Output Width) pins. This dual-width capability enables flexible bus-matching between mismatched data paths without external logic, and is confirmed in the device's functional description and pin configuration tables.

Does the IDT72V253L6PFG support zero-latency retransmit?

Yes, the IDT72V253L6PFG supports zero-latency retransmit when the RM (Retransmit Timing Mode) pin is held LOW during master reset. In this mode, asserting RT on a rising RCLK edge causes the read pointer to reset and the first word to appear on Q outputs within the same RCLK cycle - a feature verified in the AC timing diagrams and functional block description.

Is the IDT72V253L6PFG compatible with 5 V logic interfaces?

Yes, the IDT72V253L6PFG features 5 V-tolerant inputs - all control and data input pins (WEN, REN, D0–D17, etc.) accept voltages up to 5.5 V while operating from a 3.3 V supply. This is explicitly stated in the DC Electrical Characteristics table under VIH (Input High Voltage) and confirmed in the "Features" section of the datasheet.

What package type is used for the IDT72V253L6PFG?

IDT72V253L6PFG uses an 80-pin Thin Quad Flat Pack (TQFP) with PN80 footprint and order code PF. This is distinct from the BGA variant (BC100), and excludes BGA-only features like JTAG, ASYR/ASYW, and TRST/TCK/TMS/TDO pins - as confirmed in the Pin Configurations and Pin Description sections specific to TQFP.

Can the IDT72V253L6PFG operate in both FWFT and Standard timing modes?

Yes, the IDT72V253L6PFG supports both First Word Fall Through (FWFT) and IDT Standard timing modes. The mode is selected by the state of the FWFT/SI pin during master reset: LOW enables FWFT (first word appears after three RCLK edges), HIGH selects Standard mode (requires explicit REN activation). This dual-mode capability is documented in the DESCRIPTION and FUNCTIONAL BLOCK DIAGRAM sections.