Diodes Incorporated PI6CG336Q2ZLWEX

Overview

PI6CG336Q2ZLWEX from Diodes Incorporated is a 6-output PCIe Gen 6 clock generator for automotive applications, featuring 3.3V supply, 25MHz crystal/CMOS input, six differential low-power HCSL outputs with on-chip termination, and AEC-Q100 qualification. It delivers <0.04ps RMS jitter (PCIe 6.0 common clock), <50ps cycle-to-cycle jitter, and supports selectable -0.25% or -0.5% spread-spectrum modulation.

For engineers reviewing the PI6CG336Q2ZLWEX datasheet, PI6CG336Q2ZLWEX pinout, PI6CG336Q2ZLWEX application, or PI6CG336Q2ZLWEX equivalent, key selection criteria include PCIe 6.0 jitter compliance, individual output enable control, programmable slew rate per output, and automotive-grade power-down/wake-on-LAN behavior.

Technical Context

The device integrates a proprietary PLL architecture optimized for PCIe 6.0 timing integrity, with differential outputs blocked until PLL lock detection. It accepts a 25MHz fundamental-mode crystal or CMOS reference and generates six 100MHz HCSL clocks with on-chip 85Ω termination, eliminating 32 external resistors.

Configuration is supported via tri-level strapping pin SS_SEL_TRI for initial spread-spectrum selection and SMBus interface (7-bit address 0x68/0x6A) for runtime control of output enable, slew rate, amplitude, and REFOUT behavior - including wake-on-LAN mode where REFOUT remains active during power-down.

Key Specifications

Pinout & Package

Package: 40-contact, 5×5mm QFN (ZLW), exposed thermal pad, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242BILF and Si5341-A01879-GM, the PI6CG336Q2ZLWEX uniquely combines PCIe 6.0 jitter compliance, on-chip HCSL termination, AEC-Q100 qualification, and per-output programmability in a single 5×5mm package - reducing component count and validation effort for automotive and high-speed storage designs.

Availability

PI6CG336Q2ZLWEX is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, PCIe 6.0 SSD controller modules, and AI accelerator expansion cards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PI6CG336Q2ZLWEX 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 PI6CG336Q belongs to Diodes' PCIe-optimized clock generator product line, designed specifically to meet stringent jitter, EMI, and automotive reliability requirements of next-generation high-speed serial interconnects.

FAQ

What is the function of the SS_SEL_TRI pin?

The SS_SEL_TRI pin (Pin 1) is a tri-level latched input that selects spread-spectrum modulation amount at initial power-up: logic '1' enables –0.5% spread, 'M' (mid-voltage) disables spread, and '0' disables spread. It has internal pull-up and pull-down resistors, and its state is sampled on the first high assertion of PD#. SMBus registers can later adjust spread amount but cannot toggle spread on/off without reset.

How does the PI6CG336Q2ZLWEX handle power-down and wake-on-LAN?

Asserting PD# low places the device in power-down mode, reducing total current to <2mA. In wake-on-LAN mode (configured via SMBus Byte 3 bit 5 = 1), the REFOUT remains active during PD#-initiated power-down, enabling downstream circuitry to monitor events. The differential outputs remain disabled unless explicitly enabled via OE# pins or SMBus register.

Can the HCSL outputs operate without external termination resistors?

Yes - the PI6CG336Q2ZLWEX integrates 85Ω on-chip termination for all six HCSL outputs, eliminating the need for 32 external resistors. This simplifies PCB layout, improves signal integrity consistency, and reduces BOM cost. External termination is not required unless custom impedance matching is needed for specific trace geometries.

What is the significance of the ZLW package designation?

ZLW denotes Diodes Incorporated's 40-pin, 5×5mm QFN package with wettable flanks and an exposed thermal pad. It supports automated optical inspection (AOI) of solder joints and provides enhanced thermal performance for automotive under-hood applications. The package is lead-free, halogen-free, and fully RoHS 3 compliant (2015/863/EU).