Diodes Incorporated PI6CB332001ZXBIEX

Overview

PI6CB332001 from Diodes Incorporated is a 20-output PCIe Gen 4/Gen 5/Gen 6 clock buffer with HCSL input, 20 low-power differential HCSL outputs, on-chip 85Ω termination, and dual-mode output enable control (OE# pins + SMBus or 3-wire side-band interface). It operates at 3.3V, supports 100–400MHz input, and delivers <16fs RMS additive jitter for PCIe Gen 6 compliance in server and AI accelerator timing subsystems.

For engineers reviewing the PI6CB332001 datasheet, PI6CB332001 pinout, PI6CB332001 application, or PI6CB332001 equivalent, key selection criteria include differential jitter performance (<16fs RMS for Gen 6), integrated on-die termination eliminating 80 external resistors, real-time per-output enable via SMBus or side-band interface, and industrial temperature support (–40°C to +85°C).

Technical Context

This device implements a high-fidelity fanout architecture optimized for PCIe Gen 6 reference clock distribution. Its proprietary analog front-end achieves sub-16fs RMS differential additive phase jitter while maintaining <50ps output-to-output skew and <3ns propagation delay across all 20 HCSL output pairs.

The dual-control logic integrates three independent enable domains: hardware OE# pins (for Q5–Q12), SMBus register bits (all 20 outputs), and a dedicated 3-wire side-band interface (DATA/CLK/SHFT_LD#) that overrides OE# when SBEN = 1 - all synchronized to prevent output glitches during mode transitions.

Key Specifications

Pinout & Package

PI6CB332001 uses an 80-lead, 6×6 mm dual-row aQFN package with exposed thermal pad (EPAD) connected to GND. Pin pitch is 0.4 mm; package complies with JEDEC MO-220 and IPC-7351 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242 and Si53320-A01, the PI6CB332001 uniquely combines Gen 6–compliant jitter, on-die HCSL termination, and dual-mode enable control - delivering higher integration, lower system cost, and future-proof timing performance for next-generation data center platforms.

Availability

PI6CB332001 is available at Aetrix Electronics and suitable for PCIe Gen 6 server backplanes, AI accelerator racks, and high-density NVMe storage enclosures requiring stable component supply, long-term lifecycle assurance, and RoHS 3/Green compliance.

Supply support for PI6CB332001 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The PI6CB332001 belongs to Diodes' high-performance clock buffer product line, engineered specifically for PCIe Gen 4/5/6, SAS, and UPI timing distribution in data center and AI infrastructure where ultra-low jitter and layout simplicity are critical.

FAQ

Does PI6CB332001 support spread spectrum clocking (SSC)?

Yes, the PI6CB332001 is explicitly designed to be spread-spectrum tolerant. Its input stage and internal PLL architecture maintain <16fs RMS additive jitter even when driven by spread-spectrum-modulated reference clocks - a requirement for PCIe Gen 6 EMI compliance in high-density server environments.

How does the side-band interface (SBI) interact with SMBus register access?

When SBEN = 1, the SBI takes priority: OE5#, OE6#, and OE10# become DATA, CLK, and SHFT_LD# respectively, and SMBus output enable bits remain readable but do not affect outputs. SMBus mask registers (Bytes 8–10) stay active and can force outputs enabled regardless of SBI shift register contents - preventing accidental disable of critical clocks.

What is the function of the PWRGD/PWRDN# pin during power sequencing?

PWRGD/PWRDN# serves as both a power-good indicator and a hard power-down control. A rising edge initiates startup and latches input configurations; holding it low forces the device into a 3–5 mA power-down state with all outputs disabled. Internal pull-down ensures safe default behavior during uncontrolled power ramp.

Can PI6CB332001 drive non-HCSL loads such as LVDS or LVPECL?

No - the PI6CB332001 outputs are fixed HCSL (85Ω differential, 0.7V swing) with on-die termination optimized for 85Ω PCB traces. Driving LVDS (100Ω) or LVPECL (50Ω) loads would cause impedance mismatch, signal reflection, and degraded jitter performance; external level-shifting buffers are required for such interfaces.