Diodes Incorporated PI6CB33201ZDIEX

Overview

PI6CB33201ZDIEX from Diodes Incorporated is a two-output, very-low-power PCIe clock buffer with integrated PLL, HCSL input (100 MHz default), dual differential low-power HCSL outputs with on-chip 100 Ω termination, <50 ps output-to-output skew, and PCIe Gen1–Gen5 CC compliance. It supports spread-spectrum tolerance and individual output enable for power-managed server and storage applications.

For engineers reviewing the PI6CB33201ZDIEX datasheet, PI6CB33201ZDIEX pinout, PI6CB33201ZDIEX application, or PI6CB33201ZDIEX equivalent, this device delivers verified cycle-to-cycle jitter <50 ps, SMBus-configurable slew rate/amplitude, tri-level strapping for address/bandwidth selection, and industrial-grade operation from –40°C to +85°C.

Technical Context

The PI6CB33201ZDIEX implements a proprietary low-jitter PLL architecture with selectable loop bandwidth (low/high) and PLL-bypass mode, enabling precise timing control across PCIe Gen1–Gen5 and non-PCIe frequencies (50/125/133.33 MHz). Its dual-output HCSL drivers feature independent OE# pins and programmable amplitude (0.6–0.85 V) and slew rate (2.2–4.0 V/ns).

Configuration is supported via SMBus (block-read/write, 7-bit slave address latched on SADR_TRI) or hardware strapping (BW_SEL_TRI, SADR_TRI), with internal pullup/pulldown resistors (120 kΩ) ensuring deterministic startup. Power-down mode (PD#) reduces analog current to 0.5 mA while maintaining SMBus accessibility.

Key Specifications

Pinout & Package

PI6CB33201ZDIEX is housed in a 24-lead, 4 mm × 4 mm TQFN package with exposed pad (EPAD) requiring connection to ground. Pin functions are validated per Diodes DS41833 Rev 7-2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242A and ICS843002AGI-01LFT, the PI6CB33201ZDIEX uniquely combines Gen5 compliance, on-chip 100 Ω termination, SMBus-programmable amplitude/slew, and 50/125/133.33 MHz support - delivering lower BOM cost, smaller footprint, and broader protocol coverage in a single 4 mm × 4 mm package.

Availability

PI6CB33201ZDIEX is available at Aetrix Electronics and suitable for PCIe server motherboards, enterprise NVMe SSDs, telecom Ethernet line cards, and multi-protocol edge gateway designs requiring stable component supply, long-term lifecycle support, and RoHS 3/Halogen-free compliance.

Supply support for PI6CB33201ZDIEX 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 ICs, specializing in high-performance timing, power management, and signal integrity solutions for industrial, computing, and communications markets.

The PI6CB33201 belongs to Diodes' PCIe-optimized clock buffer product line, designed specifically to reduce jitter, simplify layout, and extend compatibility across PCIe Gen1 through Gen5 while minimizing external components and power consumption.

FAQ

What is the minimum input clock slew rate supported by PI6CB33201ZDIEX?

The device specifies a minimum differential input slew rate of 0.4 V/ns, measured across a ±75 mV window centered at differential zero. This ensures reliable locking across PCIe Gen1–Gen5 reference clocks and accommodates typical HCSL oscillator outputs without external conditioning.

Can PI6CB33201ZDIEX operate without SMBus configuration?

Yes - it boots into default 100 MHz PCIe mode with high-bandwidth PLL, 0.75 V output amplitude, and fast slew rate. All strapping pins (BW_SEL_TRI, SADR_TRI) have internal pullup/pulldown resistors (120 kΩ), enabling full functionality without SMBus initialization.

How does the on-chip 100 Ω termination affect PCB layout?

The integrated 100 Ω differential termination eliminates the need for eight external 50 Ω resistors (four per output pair), reducing net count, saving ~3.5 mm² board area per output, and removing stub-induced reflections - directly improving signal integrity and easing routing in dense PCIe layouts.

Is PI6CB33201ZDIEX qualified for automotive applications?

No - it is rated for industrial temperature (–40°C to +85°C) and not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., PI6CB33201Q) with PPAP capability and IATF 16949 manufacturing; contact Diodes sales for qualified alternatives.