Texas Instruments SN74ALVC3651-10PCB

Mfr. Part

SN74ALVC3651-10PCB

Manufacturer

Luminary Micro/Texas Instruments

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Detailed Description

High-speed 3.3 V synchronous FIFO memory, 2K × 36 organization (total 72K bits), part of the 74ALVC series. Designed for buffering, rate matching, and data queuing between asynchronous or different-speed buses. Bi-directional data path with independent read and write ports, programmable flags, and retransmit capability. Package is 120-pin HLQFP (14 × 14 mm). Operating temperature 0°C to 70°C. RoHS non-compliant. Tray packaging. Typical applications include telecom/networking line cards, DSP/FPGA interfaces, video frame buffering, and high-speed data capture.

Key Features

Synchronous FIFO operation with independent read and write clocks

Memory size 72K bits organized as 2K × 36

Supply voltage 3 V to 3.6 V (3.3 V nominal)

High data rate up to 100 MHz

Access time 7.5 ns

Bi-directional bus support

Expansion support in both depth and width for larger FIFO implementations

Programmable flag thresholds (Almost-Empty and Almost-Full)

Empty and Full flags for flow control

Retransmit capability to restart data output from the beginning

First-Word Fall-Through not supported (FWFT Support: No)

74ALVC series Advanced Low-Voltage CMOS technology

Surface-mount 120-HLQFP for compact designs

Key Advantages

Simplifies high-speed rate matching between subsystems (MCU, DSP, FPGA, ASIC)

Reduces latency jitter with synchronous control and precise flags

Scales to wider or deeper buffers using on-chip expansion signals

Robust flow control via programmable flags reduces overflow/underflow risk

Stable 3.3 V operation compatible with LVTTL/CMOS I/O environments

Compact 120-pin HLQFP saves board area versus multi-chip buffers

Proven TI/Luminary Micro logic family for reliability and availability

Packaging

Type: 120-HLQFP (High-profile LQFP), surface mount

Material: Epoxy molding compound with copper leadframe (typical for LQFP)

Size: 14 × 14 mm body, low-profile quad flat package

Pin count and configuration: 120 pins including 36-bit data inputs, 36-bit data outputs, read/write clocks, enables, flags (EF, FF, PAE, PAF), retransmit, expansion pins, VCC and GND distribution

Pin pitch: LQFP fine pitch (refer to datasheet for exact pitch and footprint)

Thermal characteristics: Rated for 0°C to 70°C commercial temperature range; ensure adequate decoupling and board copper for heat spreading; follow datasheet θJA/θJC guidance and use thermal vias under the pad area as recommended

Electrical properties: 3.0 V to 3.6 V supply, 100 MHz data rate, 7.5 ns access time, Bi-Directional bus; Current supply (max) listed as 350A in provided data (this value appears atypical for an IC and should be verified in the datasheet); programmable flags supported; retransmit supported; FWFT not supported

Mounting: Surface mount reflow; tray packaging for handling and assembly

Quantity available: 18 units (current stock)

Lifecycle

Current lifecycle from provided data is not specified

RoHS status: Non-compliant; consider environmental requirements for your project

Nearing discontinuation: No explicit indication from the provided parameters; confirm with Y-IC for up-to-date status

Equivalent or alternative models: Pin-for-pin and function-compatible equivalents are vendor and series specific. Common industry families offering 3.3 V synchronous FIFO in 2K × 36 include Renesas/IDT synchronous FIFO families and Cypress/Infineon CY7C42xxV families. Exact cross-references and pin compatibility vary by revision and package. For a vetted, detailed list with compatibility checks, contact Y-IC sales via our website. We will provide precise alternates and migration guidance.

If you require a lead-free or extended-temperature variant, or if exact equivalents are not available for your layout, please reach out to our sales team for curated options and engineering support

Key Application Areas

Telecom and networking line cards (buffering between PHY, MAC, and switch fabrics)

FPGA/ASIC interfaces (rate adaptation and clock-domain crossing)

DSP and microcontroller subsystems (burst buffering and queue management)

High-speed data acquisition (ADC capture and stream decoupling)

Video and imaging pipelines (frame or line buffering between codecs and processors)

Industrial control and instrumentation (event buffering, time-aligned data transfer)

Storage and I/O bridges (SCSI/SATA legacy interfacing, bus-width translation)

Printer and office equipment controllers (data spooling and flow control)

Datasheet

Y-IC hosts the most authoritative datasheet for SN74ALVC3651-10PCB on our product page. We recommend downloading it now for full electrical specifications, pinout, timing diagrams, footprint, and design guidelines.

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