Diodes Incorporated PI49FCT3807DQ

Overview

PI49FCT3807DQ from Diodes Incorporated is a 3.3V, 1-10 non-inverting clock buffer optimized for high-frequency, low-skew clock distribution in synchronous networking systems. It delivers ≤250ps output-to-output skew, <2.5ns propagation delay, and supports input frequencies up to 156 MHz with 5V-tolerant inputs. Its 20-pin QSOP package and multiple VDD/GND pins support noise-sensitive telecom and datacom timing applications.

For engineers reviewing the PI49FCT3807DQ datasheet, PI49FCT3807DQ pinout, PI49FCT3807DQ application, or PI49FCT3807DQ equivalent, key selection criteria include output skew budget, 5V-input tolerance in mixed-voltage systems, thermal performance at +105°C, and QSOP footprint compatibility with high-density PCB layouts.

Technical Context

The PI49FCT3807DQ implements a fully buffered, single-input–ten-output architecture with TTL-compatible input thresholds and CMOS-level outputs. All ten CLK[0:9] outputs are internally matched for minimal inter-output skew under identical loading and temperature conditions.

It operates across –40°C to +105°C with 3.3V ±0.3V supply, supports DC–156 MHz input frequency, and maintains <250ps skew between any two outputs within the same package at worst-case temperature (105°C). Propagation delay remains ≤3.0 ns across full industrial temperature range.

Key Specifications

Pinout & Package

Package: 20-pin QSOP (150-mil wide), RoHS-compliant, lead-free, green construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-to-10 clock buffer applications.

Compared with IDT5V9801PGI and NB3N511MNR2G, the PI49FCT3807DQ uniquely combines 10-output fanout, 5V input tolerance, and ≤250ps skew in a single QSOP package-making it optimal for compact, mixed-voltage, high-channel-count clock trees where pin count and BOM simplicity are critical.

Availability

PI49FCT3807DQ is available at Aetrix Electronics and suitable for telecom line cards, Gigabit Ethernet switches, and industrial FPGA timing systems requiring stable component supply, long-term lifecycle support, and RoHS3-compliant sourcing.

Supply support for PI49FCT3807DQ 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-performance analog, logic, and timing solutions for industrial, computing, and communications markets.

The PI49FCT3807DQ belongs to Diodes' FCT-series high-speed clock buffer family, engineered specifically for low-skew, low-jitter clock distribution in synchronous networking infrastructure where timing precision directly impacts throughput and reliability.

FAQ

What is the maximum operating frequency supported by the PI49FCT3807DQ?

The PI49FCT3807DQ supports input frequencies from DC up to 156 MHz across its full industrial temperature range (–40°C to +105°C), verified per DS43193 Rev 2-2 switching characteristics tables at 105°C with CL = 15 pF loading.

Does the PI49FCT3807DQ require external termination resistors on its outputs?

No external termination is required for standard operation. The device drives 15 pF loads directly with ≤1.0 ns rise/fall times; however, series source termination (22–33 Ω) is recommended for controlled-impedance PCB traces exceeding 2 inches to suppress reflections in high-frequency layouts.

Can the PI49FCT3807DQ be used with a 2.5V supply?

No. The PI49FCT3807DQ is specified only for 3.3V ±0.3V operation (VDD = 3.0V to 3.6V). Supplying 2.5V violates the Absolute Maximum Rating and will result in undefined logic levels, increased skew, and potential functional failure per DC Electrical Characteristics table.

How many ground pins does the PI49FCT3807DQ QSOP package have?

The 20-pin QSOP package has four dedicated GND pins (pins 8, 9, 12, and 14), distributed to minimize ground bounce and provide low-inductance return paths for groups of output drivers, as confirmed in the Pin Configuration diagram and Pin Description table.