Renesas 72V253L7-5BC

Overview

72V253L7-5BC 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, 5V-tolerant inputs, and programmable Almost-Empty/Almost-Full flags - deployed in telecom data buffering and video frame synchronization systems.

For engineers reviewing the 72V253L7-5BC datasheet, 72V253L7-5BC pinout, 72V253L7-5BC application, or 72V253L7-5BC equivalent, key selection considerations include x9/x18 bus-matching configuration, FWFT vs. IDT Standard timing mode, zero-latency retransmit capability, and BGA-only features including JTAG boundary scan and asynchronous port selection.

Technical Context

This FIFO implements dual-clock, asynchronous/synchronous configurable ports with independent RCLK and WCLK domains operating from DC to 166 MHz without frequency ratio constraints. It supports flexible bus-matching via IW/OW pins and offers two timing modes - IDT Standard (flagged by EF/FF) and First Word Fall Through (flagged by OR/IR) - selected at master reset.

The device integrates programmable flag logic (PAE/PAF) with eight default offset settings controlled by FSEL0/FSEL1/LD, plus synchronous or asynchronous flag timing selected by PFM. Retransmit functionality (RT/RM) enables zero-latency reread of FIFO contents, while auto power-down reduces ICC2 to ≤15 mA during idle operation.

Key Specifications

Pinout & Package

72V253L7-5BC is housed in a 100-pin Ball Grid Array (BGA) package with 1 mm pitch and 11 mm × 11 mm footprint (order code BC). This package supports all advanced features including JTAG boundary scan, asynchronous read/write ports (ASYR/ASYW), and zero-latency retransmit (RM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V255LA, 72V253L7-5BC delivers higher clock tolerance and built-in testability; compared with IDT72V263L7-5BC, it offers optimal cost/depth balance for mid-range buffering needs without over-provisioning memory.

Availability

72V253L7-5BC is available at Aetrix Electronics and suitable for telecom infrastructure, video processing, industrial gateways, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for 72V253L7-5BC 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.

The SuperSync II™ FIFO product line - including 72V253L7-5BC - was designed for high-reliability, high-throughput data buffering in network routers, video encoders, and protocol-bridging systems demanding deterministic latency and flexible bus-width adaptation.

FAQ

What memory configurations does the 72V253L7-5BC support?

The 72V253L7-5BC supports two memory organizations: 4,096 words × 18 bits or 8,192 words × 9 bits. Configuration is fixed at power-up based on internal architecture - no runtime switching. Both modes share identical timing, flag behavior, and pin functionality, differing only in effective depth and width for data flow matching.

Does the 72V253L7-5BC support asynchronous read and write operations?

Yes, the 72V253L7-5BC supports asynchronous read and write ports - but only in the BGA package (72V253L7-5BC). Asynchronous mode is enabled via ASYR (asynchronous read) and ASYW (asynchronous write) pins during master reset. When enabled, RD and WR replace RCLK and WCLK as edge-triggered strobes, and OE must be used for output control.

How is the First Word Fall Through (FWFT) mode configured on the 72V253L7-5BC?

FWFT mode is selected by holding FWFT/SI LOW during Master Reset (MRS). In this mode, the first word written to an empty FIFO appears on Q0–Q17 after three RCLK edges without requiring REN assertion. Subsequent reads still require REN = LOW. The 72V253L7-5BC retains full compatibility with IDT Standard mode (EF/FF flags) when FWFT/SI = HIGH at MRS.

What is the purpose of the RM pin on the 72V253L7-5BC?

The RM (Retransmit Timing Mode) pin configures zero-latency versus normal-latency retransmit behavior. When RM = LOW during MRS, asserting RT on a rising RCLK edge places the first FIFO word on Q outputs on that same edge. When RM = HIGH, retransmit follows standard latency timing. This feature is exclusive to BGA-packaged variants like the 72V253L7-5BC.

Can the 72V253L7-5BC be used in industrial temperature environments?

Yes, the 72V253L7-5BC is qualified for industrial temperature operation from –40°C to +85°C. Its DC and AC electrical specifications - including 166 MHz max clock, 5 V-tolerant inputs, and ≤15 mA standby current - are fully characterized across this range per JEDEC JESD8-A compliance requirements.