Diodes Incorporated PI6C39X020401XECIEX

Overview

PI6C39X020401XECIEX from Diodes Incorporated is a low-skew, low-additive-jitter 1-to-4 LVCMOS clock buffer IC with 50 ps output-to-output skew, 50 fs RMS additive jitter at 156.25 MHz, and support for input/output frequencies up to 250 MHz across 1.5 V–3.3 V supply operation. It features an output enable (OE) pin that tri-states all four outputs, 3.3 V tolerant CLK input, and operates over –40°C to +105°C - deployed in high-speed timing distribution for industrial FPGA/ASIC clock trees.

For engineers reviewing the PI6C39X020401XECIEX datasheet, PI6C39X020401XECIEX pinout, PI6C39X020401XECIEX application, or PI6C39X020401XECIEX equivalent, key selection criteria include sub-65 ps skew tolerance, <0.05 ps additive jitter compliance, OE-controlled output gating, and X1DFN-8 (XEC) package thermal performance in space-constrained PCB layouts.

Technical Context

This device implements a single-rail, rail-to-rail input clock buffer architecture with internal pull-up resistors on CLK and OE pins, enabling direct connection to 3.3 V logic without external biasing. Its propagation delay ranges from 0.8 ns (at 3.3 V) to 3 ns (at 1.5 V), with consistent 20 Ω nominal output impedance and 5 pF input capacitance across all voltage rails.

The buffer supports simultaneous fanout to four synchronous loads with matched trace routing, leveraging low-capacitance CMOS outputs and built-in start-up timing (2 ms after VDD ramp). Output enable assertion disables all Q1–Q4 outputs into high-impedance state within ≤3 clock cycles, preserving signal integrity during dynamic power management.

Key Specifications

Pinout & Package

PI6C39X020401XECIEX is housed in an 8-pin X1DFN (XEC) package - ultra-thin, lead-free, halogen-free, and RoHS-compliant with matte tin-plated terminals. Thermal resistance is θ_JA = 157°C/W (still air) and θ_JC = 42°C/W, supporting compact thermal design in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-to-4 LVCMOS clock buffer applications.

Compared with ICS85310AMLF and PI6C20400LEX, PI6C39X020401XECIEX delivers optimal balance of low-power operation (10–35 mA), wide voltage flexibility (1.5–3.3 V), and precision timing (50 ps skew, 0.05 ps jitter) in the smallest possible X1DFN-8 footprint - making it ideal for thermally constrained, multi-rail industrial and automotive timing nodes.

Availability

PI6C39X020401XECIEX is available at Aetrix Electronics and suitable for industrial PLC timing distribution, FPGA clock fanout, and automotive ADAS sensor hub applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI6C39X020401XECIEX 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 automotive markets.

The PI6C39X series targets high-fidelity clock distribution in space- and power-constrained systems, emphasizing ultra-low skew, sub-100 fs jitter, and extended temperature reliability - directly addressing timing-critical needs in FPGA-based edge AI accelerators and automotive domain controllers.

FAQ

What is the minimum recommended decoupling capacitor for PI6C39X020401XECIEX?

A 0.1 µF ceramic capacitor must be placed between VDD (pin 7) and GND (pin 6), located as close as possible to the device. For improved high-frequency noise suppression, a 1 µF capacitor may be added in parallel. This configuration meets the device's transient current demands and maintains stable supply rail integrity during output switching events.

Can PI6C39X020401XECIEX drive unterminated 50 Ω transmission lines?

No - the device has 20 Ω nominal output impedance and is designed for series-terminated CMOS traces. A 33 Ω resistor should be placed in series near each Q1–Q4 output when driving traces longer than 1 inch. Direct connection to 50 Ω loads causes signal reflection and violates VOH/VOL specifications under load.

Is PI6C39X020401XECIEX qualified for automotive AEC-Q100 stress testing?

No - the part is specified for industrial temperature range (–40°C to +105°C) and carries no AEC-Q100 qualification. However, its extended temperature rating, Pb-free/Green construction, and IATF 16949-manufactured process make it suitable for non-safety-critical automotive applications where formal qualification is not mandated.

How does the OE pin behave during power-up before VDD stabilization?

The OE pin has an internal pull-up resistor, so outputs remain enabled (not tri-stated) during VDD ramp-up. Valid clock outputs begin after t_START-UP = 2 ms from VDD reaching operational threshold. No external OE control is needed for default active operation; OE must be actively driven low only when intentional output disable is required.