Diodes Incorporated PI6C49CB04CQ3WEX

Overview

PI6C49CB04CQ from Diodes Incorporated is an AEC-Q100 qualified, low-skew (±250 ps), single-input to four-output automotive clock buffer operating from 1.5 V to 3.3 V supply. It features a 3.6 V-tolerant CLK input, OE-controlled output tri-state, and supports up to 200 MHz output frequency in Grade 3 temperature range. Used for fanning out synchronous clocks in ADAS domain controllers and infotainment SoC timing trees.

For engineers reviewing the PI6C49CB04CQ datasheet, PI6C49CB04CQ pinout, PI6C49CB04CQ application, or PI6C49CB04CQ equivalent, key selection criteria include output skew tolerance, automotive-grade thermal reliability (–40°C to +85°C), 1.5–3.3 V supply flexibility, OE-driven output control, and SOIC-W package compatibility with high-density PCB layouts.

Technical Context

This clock buffer implements a CMOS-based fanout architecture with rail-to-rail input clock handling and internally terminated inputs (51 kΩ pulldown on CLK, 125 kΩ pullup on OE). Propagation delay ranges from 0.8 ns (at 3.3 V) to 5 ns (at 1.5 V), with consistent 20 Ω nominal output impedance across all voltage rails.

It delivers additive jitter as low as 0.05 ps RMS (12 kHz–20 MHz band) at 156.25 MHz under 3.3 V operation, and maintains ±250 ps output-to-output skew across all four LVCMOS outputs regardless of supply voltage or temperature grade - critical for deterministic timing in multi-core automotive processors.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (W), 150 mil width, RoHS-compliant, lead-free, halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-skew automotive clock buffer applications.

Compared with NB3N502MNG and 8T49N241A, the PI6C49CB04CQ delivers optimal balance of automotive qualification, voltage flexibility, output control, and skew performance for dedicated fanout - avoiding unnecessary complexity or voltage constraints.

Availability

PI6C49CB04CQ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC platforms, and telematics control units requiring stable component supply across extended temperature and long product lifecycles.

Supply support for PI6C49CB04CQ 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-reliability analog and mixed-signal solutions for automotive, industrial, and computing markets.

The PI6C49CB04CQ belongs to Diodes' Pericom® automotive clock buffer product line, engineered specifically for deterministic, low-jitter clock distribution in safety-critical vehicle electronics with AEC-Q100 compliance and IATF 16949 manufacturing.

FAQ

What is the maximum supported output frequency at 1.5 V supply?

At 1.5 V supply and –40°C to +85°C ambient, the PI6C49CB04CQ supports up to 166 MHz output frequency per channel. This is verified in the AC Electrical Characteristics table (page 9 of DS41764 Rev 2-2) under VDD=1.5 V, Grade 3 conditions. Performance remains stable with 5 pF load and proper decoupling.

Does the OE pin require external pull-up or pull-down?

No - the OE pin has an internal 125 kΩ pullup resistor, ensuring outputs remain active (Q1–Q4 enabled) at power-up without external components. External biasing is optional only for enhanced noise immunity in high-EMI environments, per application note recommendations on page 12.

Can CLK accept 3.3 V signals when VDD is 1.8 V?

Yes - the CLK input is explicitly rated for 3.6 V tolerance regardless of VDD level, allowing interoperability with higher-voltage clock sources (e.g., 3.3 V XO) even when the device operates at 1.8 V. Input thresholds scale with VDD/2, and DC specs confirm VIH min = 1.1 V at 1.8 V VDD.

Is thermal derating required above 70°C ambient?

Not for Grade 3 operation: the device is rated for continuous operation up to +85°C ambient. At 85°C, with θJA = 157 °C/W and max IDD ≈ 75 mA at 3.3 V/200 MHz, calculated junction temperature is ~123°C - within the 125°C absolute maximum limit. No derating is specified in the datasheet for this grade.