Diodes Incorporated PI6C49CB04CJWEX

Overview

PI6C49CB04CJWEX from Diodes Incorporated is an industrial-grade, low-skew 1-to-4 LVCMOS/LVTTL clock fanout buffer with guaranteed output-to-output skew ≤ ±250 ps, 160 MHz maximum output frequency, and operation across 1.5V–3.3V supply rails. It features a 3.6V-tolerant CLK input, OE-controlled tri-state outputs, and internal pulldown (CLK) and pullup (OE) resistors-designed for precision clock distribution in industrial control and communications infrastructure.

For engineers reviewing the PI6C49CB04CJWEX datasheet, PI6C49CB04CJWEX pinout, PI6C49CB04CJWEX application, or PI6C49CB04CJWEX equivalent, key selection criteria include output skew budget, VDD scalability across 1.5V/1.8V/2.5V/3.3V domains, additive jitter performance (≤0.05 ps @156.25MHz), and SOIC(W) package compatibility with high-density PCB layouts.

Technical Context

This buffer implements a single-rail CMOS architecture with rail-to-rail input switching threshold at VDD/2 and matched output drivers to minimize inter-output timing variation. All four outputs share identical propagation delay (TPD ≤ 4 ns at 1.8V) and edge rates (tOR/tOF ≤ 1.5 ns), enabling synchronous fanout without external deskew compensation.

It supports dynamic output enable control with active-low OE pin having 125 kΩ internal pullup, allowing real-time clock gating without external logic. The 3.6V-tolerant CLK input permits interfacing with higher-voltage sources while operating from lower VDD rails-critical for mixed-voltage system clock trees.

Key Specifications

Pinout & Package

PI6C49CB04CJWEX is housed in an 8-pin SOIC (W), 150-mil wide package (JEDEC MS-012AC), optimized for thermal dissipation (θJA = 157°C/W) and board-space efficiency in high-density clock routing applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICS553M-01LFT and PI6C20400LEX, PI6C49CB04CJWEX uniquely delivers 1.5V–3.3V scalability, ±250 ps skew, and OE control in an 8-pin SOIC(W)-making it optimal for space-constrained, multi-rail industrial clock trees requiring precise timing control.

Availability

PI6C49CB04CJWEX is available at Aetrix Electronics and suitable for industrial PLC timing, communications baseband synchronization, and test & measurement equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for PI6C49CB04CJWEX 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 PI6C series targets low-skew, multi-output clock distribution in harsh-environment applications-designed specifically for industrial automation, telecom infrastructure, and precision instrumentation where timing repeatability and voltage flexibility are critical.

FAQ

What is the minimum recommended decoupling capacitance for PI6C49CB04CJWEX?

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 bulk capacitor may be added in parallel. This configuration ensures stable supply voltage during fast output transitions and reduces jitter induced by power rail noise.

Can PI6C49CB04CJWEX drive unterminated 50 Ω transmission lines directly?

No. The device has a nominal 20 Ω output impedance and is designed for use with series termination (e.g., 33 Ω resistor near the output pin). Driving a 50 Ω line directly causes signal reflection and overshoot. For optimal signal integrity on traces longer than 1 inch, a 33 Ω series resistor should be used at each Qx output.

Is PI6C49CB04CJWEX qualified for automotive applications?

No. The "J" suffix denotes Industrial Grade qualification (−40°C to +105°C), not AEC-Q100. While it operates within automotive ambient temperature ranges, it lacks PPAP documentation, IATF 16949 manufacturing certification, and automotive-specific reliability testing. Diodes offers separate AEC-Q100-qualified variants for automotive use.

How does the OE pin behave during power-up?

The OE pin has a 125 kΩ internal pullup resistor, so outputs default to enabled (active) at power-on. No external pullup is required. If OE is left floating, the internal pullup ensures functional operation-but for robustness in noisy environments, tying OE to VDD via a 10 kΩ resistor is recommended.