Diodes Incorporated PI6C39X0202XECIEX

Overview

PI6C39X0202XECIEX from Diodes Incorporated is a low-skew, low-additive-jitter 1-to-2 LVCMOS clock buffer 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 1.5V–3.3V supply rails. It operates from −40°C to +105°C and features an output enable (OE) pin that tri-states both outputs.

For engineers reviewing the PI6C39X0202XECIEX datasheet, PI6C39X0202XECIEX pinout, PI6C39X0202XECIEX application, or PI6C39X0202XECIEX equivalent, key selection criteria include output skew tolerance, additive jitter performance under extended temperature, supply voltage flexibility, OE-controlled output tri-state behavior, and X1DFN-8 (XEC) package compatibility with high-density PCB layouts.

Technical Context

This device implements a single-ended LVCMOS clock distribution architecture with rail-to-rail input tolerance (3.3V-tolerant CLK), internal pull-up resistors on CLK and OE, and matched delay paths to achieve ≤65 ps max output skew. Propagation delay ranges from 0.8 ns (at 3.3V) to 3 ns (at 1.5V), with rise/fall times tightly controlled between 0.6 ns and 1.6 ns depending on VDD.

The IC uses a passive, non-regenerative buffering topology-no PLL or feedback loop-making it suitable for jitter-sensitive fanout where deterministic timing integrity must be preserved. Output impedance is fixed at 20 Ω, and each output supports up to 25 mA drive strength at 3.3V, enabling direct interface with standard CMOS loads without external level-shifting.

Key Specifications

Pinout & Package

Package: 8-pin X1DFN (XEC), 1.6 mm × 1.6 mm, 0.4 mm pitch, exposed thermal pad, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-to-2 LVCMOS clock buffer applications.

Compared with ICS85301AMLF and PI6C20400LEX, PI6C39X0202XECIEX uniquely balances ultra-low skew (≤65 ps), industry-leading additive jitter (50 fs), full 1.5V–3.3V supply range, and integrated OE control-all in a 1.6 mm × 1.6 mm X1DFN package ideal for thermally constrained, high-channel-count systems.

Availability

PI6C39X0202XECIEX is available at Aetrix Electronics and suitable for industrial PLC timing, automotive ADAS sensor hubs, network switch PHY clocking, and medical imaging data acquisition requiring stable component supply across extended temperature and multi-rail voltage environments.

Supply support for PI6C39X0202XECIEX 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, automotive, and communications markets.

The PI6C39X series targets low-jitter clock distribution in space- and power-constrained applications, emphasizing minimal additive phase noise, wide supply voltage support, and robust thermal performance for mission-critical timing infrastructure.

FAQ

What is the maximum allowable clock frequency for PI6C39X0202XECIEX at 1.8V supply?

At 1.8V ±5% supply and −40°C to +105°C ambient, the device supports output frequencies up to 250 MHz, as confirmed by AC electrical characteristics tables in DS42361 Rev 4-2. This rating holds across all specified VDD conditions including 1.5V, 2.5V, and 3.3V, with propagation delay and rise/fall times remaining within guaranteed limits.

Does PI6C39X0202XECIEX require external pull-up resistors on CLK or OE pins?

No. The device integrates internal pull-up resistors on both CLK and OE pins, eliminating the need for external biasing components. The datasheet specifies these internal pull-ups have values ≥50 kΩ-sufficient for reliable logic-level definition while minimizing current draw and board space usage.

Can PI6C39X0202XECIEX drive 50 Ω transmission lines directly?

No. Its nominal output impedance is 20 Ω, so direct 50 Ω termination would cause signal reflection and overshoot. The recommended implementation uses a 33 Ω series resistor placed within 200 mil of the Q1/Q2 pins, as validated in the test circuit on page 8 of DS42361, to match common PCB trace impedances while maintaining edge integrity.

Is PI6C39X0202XECIEX qualified for automotive AEC-Q100 applications?

No. While rated for −40°C to +105°C operation and manufactured in IATF 16949-certified facilities, the PI6C39X0202XECIEX variant carries an 'I' (Industrial) suffix-not 'A' or 'Q'. Diodes explicitly states that AEC-Q100 qualification requires separate change control and PPAP documentation, which must be requested separately through their automotive team.