Diodes Incorporated PI6C5912012ZDIEX

Overview

PI6C5912012ZDIEX from Diodes Incorporated is a 12-output LVPECL fanout buffer with up to 2 GHz output frequency, < 0.01 ps typical additive phase jitter (156.25 MHz, 12 kHz–20 MHz), dual selectable differential/single-ended reference inputs, and separate core (VDD) and output (VDDO) supplies for level shifting. It serves as a low-skew clock distribution IC in high-speed networking switch fabric timing paths.

For engineers reviewing the PI6C5912012ZDIEX datasheet, PI6C5912012ZDIEX pinout, PI6C5912012ZDIEX application, or PI6C5912012ZDIEX equivalent, key selection criteria include LVPECL output skew (<30 ps), input select logic (IN_SEL), thermal pad grounding, TQFN-40 package footprint, and dual-supply voltage compatibility (2.5 V / 3.3 V).

Technical Context

The PI6C5912012ZDIEX implements a high-fidelity clock fanout architecture with two independent differential reference inputs (REF_IN0±, REF_IN1±), selected via LVCMOS/LVTTL IN_SEL control. Its internal biasing includes VREF_AC output for AC-coupled input termination and supports both DC- and AC-coupled LVPECL input configurations.

It delivers 12 matched LVPECL output pairs (Q0± through Q11±) with propagation delay of 750 ps, part-to-part skew ±50 ps, and output duty cycle tightly controlled at 48–52%. The device operates across industrial temperature (−40 °C to +85 °C) with dedicated VDD (core) and VDDO (output) rails enabling mixed-voltage system interfacing.

Key Specifications

Pinout & Package

The PI6C5912012ZDIEX is housed in a 40-pin Thin Quad Flat No-Lead (TQFN) package with exposed thermal pad (package code ZD). The package requires soldering the thermal pad to a grounded PCB copper area for thermal management and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT8T49N242A and Si53302-A01AGM, the PI6C5912012ZDIEX offers lower power (105 mA), simpler configuration (no I²C or programming), and superior jitter performance (0.01 ps vs. 0.04 ps), making it optimal for fixed-frequency, low-noise fanout in space-constrained telecom and computing modules.

Availability

PI6C5912012ZDIEX is available at Aetrix Electronics and suitable for 10G/25G Ethernet switch fabric timing, PCIe Gen4/Gen5 reference clock distribution, and high-speed backplane timing modules requiring stable component supply and guaranteed long-term industrial temperature support.

Supply support for PI6C5912012ZDIEX 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 PI6C5912012 belongs to Diodes' Pericom® timing product line, engineered specifically for ultra-low-jitter clock distribution in high-speed serial data infrastructure where deterministic skew and phase noise preservation are critical.

FAQ

What is the recommended power supply decoupling for PI6C5912012ZDIEX?

Each VDD and VDDO pin requires individual 0.1 µF ceramic + 1 µF bulk capacitance placed as close as possible to the pin. The thermal pad must be connected to a solid ground plane. This decoupling scheme minimizes supply-induced jitter and ensures stable 2 GHz operation per the DS40091 Rev 2-2 layout guidelines.

Can PI6C5912012ZDIEX accept single-ended CMOS clock inputs?

Yes - REF_IN0± and REF_IN1± can accept single-ended inputs by AC-coupling the signal to one pin and terminating the other to VREF_AC (for mid-rail bias) or GND. Input high/low thresholds are defined per LVCMOS levels (VIH = 2.0 V min at 3.3 V VDD), and input differential amplitude must meet 0.1–1.5 Vpp depending on frequency.

How is output skew measured and what does "part-to-part skew" mean?

Output skew (TSK) is the maximum time difference between any two LVPECL output transitions under identical load conditions (13–30 ps typ/max). Part-to-part skew (TP2P) is the worst-case delay variation between identical pins on two separately packaged devices (±50 ps), critical for multi-chip clock synchronization in large-scale systems.

Is the thermal pad of PI6C5912012ZDIEX electrically connected internally?

No - the thermal pad is not internally connected to any circuit node. It must be externally soldered to a PCB ground plane to provide thermal conduction and reduce ΘJA from 26.18 °C/W to specification-compliant levels. Floating or unconnected thermal pads cause excessive junction temperature and potential timing drift or failure.