Texas Instruments SN74ALVC3631-20PQ

Mfr. Part

SN74ALVC3631-20PQ

Manufacturer

Luminary Micro/Texas Instruments

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Detailed Description

High-performance 3.3 V synchronous FIFO memory, 18K bits organized as 512 x 36. Bi-directional data bus, programmable status flags, retransmit capability, and scalable expansion in both depth and width. Packaged in a 132-pin bumpered BQFP for reliable surface-mount assembly. Designed for 0°C to 70°C operation and up to 50 MHz data rate.

Key Features

Organization: 512 x 36 (18K bits)

Supply voltage: 3.0 V to 3.6 V (typical 3.3 V)

Data rate: up to 50 MHz

Access time: 11.5 ns

Synchronous operation on read and write

Bi-directional bus for flexible system interfacing

Programmable flags (Almost-Full, Almost-Empty)

Retransmit capability for rapid buffer replay

Expansion support: chain devices in depth or width

FWFT support: No (standard synchronous read behavior)

Series: 74ALVC (Advanced Low-Voltage CMOS)

Base product number: 74ALVC3631

Mounting: Surface mount

Package: 132-BQFP bumpered, tray packaging

RoHS status: Non-compliant (leaded finish)

Key Advantages

Wide 36-bit data path simplifies high-throughput designs

Clean synchronous timing improves data integrity at high speeds

Programmable flags enable precise flow control and early warning thresholds

Retransmit function speeds debug and repeat-read use cases

Scalable architecture lets you grow buffer depth or width without redesign

Robust QFP package with bumpers for improved handling and assembly

Mature 74ALVC CMOS technology for low-voltage, high-speed logic

Packaging

Type: 132-BQFP bumpered (Quad Flat Package with corner bumpers for mechanical protection)

Material: Molded epoxy body with copper leadframe; leaded finish (Pb) indicating RoHS non-compliant

Size: 24.13 mm x 24.13 mm body footprint

Height: Standard QFP profile (refer to datasheet for exact dimension)

Pin count and configuration: 132 pins

- Typical pin groups include:

- 36-bit Data I/O bus

- Write-side control: WCLK, WEN, WRS, etc.

- Read-side control: RCLK, REN, RRS, OE, etc.

- Status outputs: FULL, EMPTY, Almost-Full, Almost-Empty

- Expansion pins for depth/width chaining

- Power pins: multiple VCC and GND for stable high-speed operation

Thermal characteristics:

- Operating temperature: 0°C to 70°C (commercial grade)

- Use adequate PCB copper, airflow, and spacing for heat dissipation; consult datasheet for thermal resistance

Electrical properties:

- VCC: 3.0 V to 3.6 V

- Data rate: up to 50 MHz

- Access time: 11.5 ns

- I/O standard: LVTTL/CMOS compatible (typical of 74ALVC family)

- Current supply (max): 350A (as listed; verify exact value in datasheet, this figure may be a typographical error)

- Bus directional: Bi-directional

- FWFT: Not supported

Lifecycle

Status: The 74ALVC family is widely used; exact lifecycle for SN74ALVC3631-20PQ and its specific finish can vary. RoHS non-compliant variants may face limited future availability in some regions.

Nearing discontinuation: No formal EOL is indicated in the provided data; confirm with the latest manufacturer notice.

Equivalent or alternative models:

- Renesas/IDT synchronous FIFO families with 3.3 V operation and 512 x 36 organization (for example, 72V362 series). Pinouts, timing, and package options vary; verify compatibility.

- Cypress synchronous FIFO families (CY7C42xx series offering 36-bit-wide, 3.3 V devices). Depth, timing, and pinout differ by sub-model; verify before substitution.

- Width expansion alternative: Combine four 9-bit synchronous FIFOs to reach 36-bit width if pin-compatible single-chip options are constrained.

If you need verified pin-to-pin equivalents or second sources, please contact our sales team via the Y-IC website. We will provide vetted, drop-in or near-drop-in options based on your exact constraints.

Key Application Areas

Network switches and routers for packet buffering and rate matching

Telecom line cards and baseband systems

DSP, FPGA, and ASIC interfaces needing high-speed buffering

Video capture and frame buffering

Data acquisition and instrumentation with bursty data streams

Bus bridging and clock-domain crossing in high-throughput systems

Storage controllers and RAID cache pipelines

Industrial automation and motor control where deterministic latency is critical

Datasheet

Y-IC hosts the most authoritative datasheet and technical documentation for SN74ALVC3631-20PQ on our product page. We recommend customers download the datasheet here to confirm pinout, timing, electrical limits, mechanical drawings, and application guidance.

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