Renesas 7204L15TPGI

Overview

7204L15TPGI from Integrated Device Technology is a 4,096 x 9-bit asynchronous CMOS FIFO buffer with 15 ns access time, industrial temperature range (–40°C to +85°C), and SOIC-28 package. It supports simultaneous read/write, features Empty/Full/Half-Full status flags, and enables retransmit functionality for data replay in buffering applications such as serial protocol bridging and DSP interface synchronization.

For engineers reviewing the 7204L15TPGI datasheet, 7204L15TPGI pinout, 7204L15TPGI application, or 7204L15TPGI equivalent, key selection criteria include its 9-bit data width with parity/control bit flexibility, 120 mA active supply current, dual-mode expansion capability (depth/width), and compatibility with the IDT720x family's pin- and function-level interoperability across memory depths.

Technical Context

The 7204L15TPGI implements a dual-port, pointer-based FIFO architecture with independent read and write address counters, enabling true asynchronous operation without clock domain constraints. Its internal RAM array stores 4,096 words of 9-bit data, with status logic generating EF, FF, and XO/HF flags based on pointer comparison.

It supports three operational modes: Single Device (XI grounded), Depth Expansion (XO→XI daisy-chain), and Width Expansion (parallel control lines). Retransmit (RT) resets the read pointer without affecting the write pointer, while FL/RT serves dual roles depending on expansion configuration-enabling first-load initialization in depth mode or retransmit in single-device mode.

Key Specifications

Pinout & Package

7204L15TPGI is housed in a 28-pin Small Outline Integrated Circuit (SOIC) package, surface-mountable with 1.27 mm pitch, compliant with JEDEC MS-012. Pin functions are validated per IDT DSC-2661/19 datasheet Figure 2a.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7204L15SOI and 7204L20TPGI, the 7204L15TPGI uniquely balances 15 ns performance, SOIC surface-mount compatibility, and industrial temperature resilience-making it optimal for new production designs requiring density, reliability, and timing precision.

Availability

7204L15TPGI is available at Aetrix Electronics and suitable for industrial serial protocol bridges, DSP interface buffers, motor drive control loop buffers, and legacy PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for 7204L15TPGI 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.

The IDT720x family-including 7204L15TPGI-was engineered specifically for deterministic, low-latency data buffering in multiprocessing, rate-matching, and real-time control systems where asynchronous handshake reliability is critical.

FAQ

What is the maximum data throughput supported by the 7204L15TPGI in asynchronous mode?

The 7204L15TPGI supports a maximum shift frequency of 33.3 MHz per AC Electrical Characteristics table, enabling up to 33.3 million words per second throughput. This assumes ideal timing margins and proper termination; actual system throughput depends on external controller timing compliance with tRC (25 ns min read cycle) and tWC (25 ns min write cycle) requirements specified for the 15 ns speed grade.

Does the 7204L15TPGI require external pull-up resistors on its status flag outputs (EF, FF, XO/HF)?

No, the 7204L15TPGI status flag outputs are active-Low, push-pull drivers-not open-drain-and do not require external pull-ups. Each flag (EF, FF, XO/HF) drives fully to V_CC or GND per DC Electrical Characteristics: VOL ≤ 0.4 V at I_OL = 8 mA and VOH ≥ 2.4 V at I_OH = –2 mA, ensuring direct interfacing with standard 5 V TTL inputs.

Can the 7204L15TPGI be used in depth expansion mode while retaining the Half-Full Flag (HF) functionality?

No-the Half-Full Flag (HF) is disabled in Depth Expansion Mode. Per datasheet Section "OPERATING MODES", HF is only active in Single Device Mode (XI grounded) or Width Expansion Mode. In Depth Expansion, XO/HF serves exclusively as Expansion Out (XO), generating pulses to advance the next device's write/read pointer; HF assertion is not available.

What is the purpose of the FL/RT pin, and how does its behavior differ between single-device and depth-expansion configurations?

In Single Device Mode (XI = GND), FL/RT functions as Retransmit (RT): pulsing LOW resets the read pointer to address zero without altering the write pointer. In Depth Expansion Mode (XI tied to prior XO), FL/RT acts as First Load (FL): grounding it designates the first device in the chain, initializing its pointers on RS; all subsequent devices must hold FL/RT HIGH to avoid unintended reset.

Is the 7204L15TPGI RoHS-compliant, and what is its lead finish specification?

Yes, the 7204L15TPGI is RoHS-compliant and uses a lead-free (Pb-free) matte tin finish. The "G" in the suffix denotes green compliance per IDT ordering nomenclature. SnPb (lead-based) versions were discontinued per PDN# SP-17-02, and all currently shipped 7204L15TPGI units meet J-STD-609 Class 1 moisture sensitivity and RoHS Directive 2011/65/EU requirements.