Diodes Incorporated PI6C49CB04BQ2WEX

Overview

PI6C49CB04BQ2WEX from Diodes Incorporated is an AEC-Q100 qualified, low-skew 1-to-4 LVCMOS/LVTTL fanout buffer designed for automotive clock distribution. It delivers 200MHz maximum output frequency, ≤45ps output skew (at 3.3V), and 0.05ps typical additive phase jitter at 156.25MHz - enabling precise timing synchronization in ADAS domain controllers and infotainment SoC clock trees.

For engineers reviewing the PI6C49CB04BQ2WEX datasheet, PI6C49CB04BQ2WEX pinout, PI6C49CB04BQ2WEX application, or PI6C49CB04BQ2WEX equivalent, this device supports multi-rail operation (1.5V–3.3V core/output supplies), operates across –40°C to +105°C (Grade 2), and provides pulldown-enabled CLK input with 51kΩ internal resistor for robust signal integrity in noisy automotive environments.

Technical Context

This buffer implements a single-ended LVCMOS/LVTTL input stage with rail-to-rail compatibility and four matched-output drivers optimized for minimal propagation delay variation (≤2.5ns max TPD at 3.3V) and tight output-to-output skew (±250ps). Its dual-supply architecture separates core logic (VDD) and output driver (VDDO) rails to support mixed-voltage system interfaces.

The device integrates internal input pulldown resistors (51kΩ typical) and features 20Ω nominal output impedance, enabling direct drive of 5pF loads without external termination. It meets AEC-Q100 Grade 2 requirements and is manufactured in IATF 16949 certified facilities with PPAP capability.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (W), 150mil wide, RoHS-compliant, halogen- and antimony-free ("Green").

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fanout buffer applications.

Compared with NB3N502MNG and CDCVF2310PWR, the PI6C49CB04BQ2WEX uniquely combines AEC-Q100 Grade 2 qualification, dual-supply operation, sub-50ps skew, and 0.05ps jitter - making it the only option qualified for high-reliability automotive clock distribution where voltage translation and timing precision are co-constrained.

Availability

PI6C49CB04BQ2WEX is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive infotainment systems, and body control modules requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.

Supply support for PI6C49CB04BQ2WEX 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 automotive, industrial, and computing markets.

The PI6C49CB04BQ belongs to Diodes' Pericom® timing portfolio, engineered specifically for automotive-grade clock distribution with emphasis on low skew, low jitter, and AEC-Q100 compliance in harsh environments.

FAQ

What is the purpose of the separate VDD and VDDO pins?

VDD powers the internal logic and input buffer, while VDDO independently supplies the output drivers. This separation allows different voltage levels on each rail - for example, 1.8V core logic with 3.3V output drivers - enabling voltage translation without external level shifters and improving noise isolation between logic and I/O sections.

Does the internal CLK pulldown resistor eliminate the need for an external pull-down?

Yes. The 51kΩ internal pulldown resistor on the CLK pin ensures a defined logic-low state when the input is unconnected or floating, preventing unintended clock toggling during power-up, reset, or signal loss. No external resistor is required unless specific board-level ESD or impedance-matching constraints dictate otherwise.

Can PI6C49CB04BQ2WEX operate at 200MHz across all supply voltages?

No. 200MHz maximum output frequency is guaranteed only at 2.5V and 3.3V VDD/VDDO operation with –40°C to +85°C ambient temperature. At 1.8V/1.5V, the max frequency is 166MHz (Grade 3) or 160MHz (Grade 2); performance degrades at lower voltages due to reduced drive strength and slower edge rates.

How does the device meet AEC-Q100 Grade 2 requirements?

It undergoes full AEC-Q100 stress testing including temperature cycling, HTOL, ESD, and mechanical shock, and is manufactured in IATF 16949 certified facilities. The Grade 2 rating confirms operation from –40°C to +105°C with full parametric validation, PPAP documentation, and change control per automotive quality standards - not just thermal rating.