Diodes Incorporated PI6C49S1504TZHIEX

Overview

PI6C49S1504TZHIEX from Diodes Incorporated is a high-performance, selectable 1:4 differential fanout buffer with two independent output banks (A and B), supporting LVDS/LVPECL/HCSL signaling per bank, up to 1.5 GHz differential output frequency, ultra-low additive phase jitter (<0.03 ps RMS at 156.25 MHz, 12 kHz–20 MHz), and LVCMOS reference output up to 200 MHz - deployed in high-speed networking switches and telecom backplane clock distribution.

For engineers reviewing the PI6C49S1504TZHIEX datasheet, PI6C49S1504TZHIEX pinout, PI6C49S1504TZHIEX application, or PI6C49S1504TZHIEX equivalent, key selection criteria include bank-level output signaling configurability, sub-40 ps intra-bank skew, <1.5 ns propagation delay, dual supply voltage support (2.5 V/3.3 V), and crystal/single-ended/differential reference input flexibility.

Technical Context

This device implements a dual-bank, fully configurable fanout architecture with independent CLK_SEL[1:0] inputs selecting between two differential clock pairs (CLK0/nCLK0, CLK1/nCLK1) or a single-ended/crystal source (XTAL_In). Each bank's output type (LVPECL/LVDS/HCSL) is set via CLKout_TYPE[1:0], enabling mixed-signal clock tree design without external level-shifting components.

It integrates separate power domains: VddRef for the 200 MHz LVCMOS REFout, VddA/VddB for each output bank (2.5 V/3.3 V compatible), and core VDD - allowing precise voltage control to match downstream receiver thresholds while maintaining <0.03 ps typical additive jitter across all supported output standards.

Key Specifications

Pinout & Package

Package: 32-pin TQFN (W-QFN5050-32, ZH code), 5.0 mm × 5.0 mm × 0.8 mm, ePad thermal ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242A and Si53302-A01AGM, PI6C49S1504TZHIEX delivers unique bank-level signaling flexibility and integrated crystal support without programmability overhead - ideal for deterministic, low-jitter fanout where configuration simplicity and multi-standard interoperability are critical.

Availability

PI6C49S1504TZHIEX is available at Aetrix Electronics and suitable for high-speed networking switches, telecom backplane clock trees, and data center router timing subsystems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI6C49S1504TZHIEX 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 PI6C49S1504TZHIEX belongs to Diodes' Precision Timing product line, engineered specifically for low-jitter clock distribution in multi-protocol, mixed-voltage infrastructure equipment where signal integrity and configurability are non-negotiable.

FAQ

What clock input types does PI6C49S1504TZHIEX support?

The device accepts three input configurations: differential (LVDS/LVPECL) via CLK0/nCLK0 or CLK1/nCLK1, single-ended CMOS via XTAL_In with internal biasing, or fundamental-mode crystal (10–50 MHz) connected across XTAL_In/XTAL_Out. Selection is controlled by CLK_SEL[1:0] pins with internal pull-downs.

Can both output banks operate at different signaling standards simultaneously?

Yes. Bank A (QA0/nQA0, QA1/nQA1) and Bank B (QB0/nQB0, QB1/nQB1) are independently configurable via CLKout_TYPE0 and CLKout_TYPE1 pins. One bank can be set to LVDS while the other uses LVPECL or HCSL - enabling direct interfacing with heterogeneous downstream devices without external level shifters.

What is the purpose of the REFout pin and its voltage requirements?

REFout delivers a buffered LVCMOS clock signal up to 200 MHz, powered by dedicated VddRef (2.5 V or 3.3 V). It is commonly used to drive FPGA configuration clocks, microcontroller system clocks, or ADC/DAC sampling clocks - decoupling reference timing from the main differential outputs to prevent noise coupling.

How is thermal performance managed in the 32-pin TQFN package?

The device uses an exposed ePad (pin 32) that must be soldered to a PCB thermal pad connected to a solid ground plane. Diodes recommends using ≥4 thermal vias under the ePad and pairing 0.1 µF + 1 µF bypass capacitors on each power rail (VDD, VddA, VddB, VddRef) to minimize thermal resistance and suppress high-frequency supply noise that impacts jitter performance.