Diodes Incorporated PI6C2405A-1LEX

Overview

PI6C2405A-1LEX from Diodes Incorporated is a PLL-based zero-delay clock buffer IC distributing five 3.3V CMOS clock outputs up to 133 MHz, with internal feedback on OUT0 enabling synchronized output-to-input timing, <300 ps input-to-output delay, and cycle-to-cycle jitter of 200 ps at 66.67 MHz - deployed in high-speed digital systems requiring precise clock distribution.

For engineers reviewing the PI6C2405A-1LEX datasheet, PI6C2405A-1LEX pinout, PI6C2405A-1LEX application, or PI6C2405A-1LEX equivalent, key selection criteria include zero-delay skew control under matched loading, 5V-tolerant CLKIN interface, spread-spectrum clock tracking capability, and industrial temperature support (–40°C to +85°C).

Technical Context

The PI6C2405A-1LEX implements a phase-locked loop with internal feedback routed exclusively through OUT0 to achieve zero-delay operation; output skew is minimized (<200 ps) only when all outputs-including the feedback path-are identically loaded. Its PLL architecture supports dynamic tracking of spread-spectrum clock inputs for EMI reduction.

It operates strictly at 3.3 V ±0.3 V, with input thresholds defined at VIL = 0.8 V and VIH = 2.0 V, and delivers rail-to-rail CMOS-compatible outputs (VOH ≥ 2.4 V, VOL ≤ 0.4 V) capable of driving 30 pF loads up to 100 MHz or 15 pF loads up to 133 MHz.

Key Specifications

Pinout & Package

PI6C2405A-1LEX is housed in an 8-pin, 173-mil wide TSSOP (L) package with exposed pad not electrically connected; footprint matches JEDEC MO-153, thermal resistance θ_JA = 120°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar zero-delay clock buffer applications.

Compared with IDT 5V2310APGI and ON Semi NB3N502FG, the PI6C2405A-1LEX uniquely combines 5-output zero-delay operation, 5 V-tolerant input, spread-spectrum tracking, and industrial temperature rating - making it optimal for EMI-constrained, multi-peripheral clock trees in industrial and networking hardware.

Availability

PI6C2405A-1LEX is available at Aetrix Electronics and suitable for network switch timing, industrial PLC clock distribution, DDR2 memory interface, and test equipment clock tree applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for PI6C2405A-1LEX 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 analog ICs, specializing in high-performance timing, power management, and signal integrity solutions for industrial, computing, and communications markets.

The PI6C2405A-1LEX belongs to Diodes' Pericom clock buffer product line, engineered specifically for zero-delay, low-jitter clock distribution in high-speed digital systems where timing predictability and EMI reduction are critical design constraints.

FAQ

What is the purpose of the OUT0 pin in PI6C2405A-1LEX?

OUT0 serves as the dedicated feedback output for the internal PLL - its signal is routed back into the PLL to lock phase and achieve zero-delay operation. For accurate skew control, OUT0 must be loaded identically to OUT1–OUT4; mismatched loading introduces measurable input-to-output delay (±300 ps) and increases output-to-output skew beyond 200 ps.

Can PI6C2405A-1LEX accept a 5 V clock input while operating at 3.3 V VDD?

Yes - CLKIN is explicitly rated 5 V tolerant per datasheet DS43461 Rev 1-2. It accepts input voltages from –0.5 V to VDD +5.5 V, enabling direct connection to legacy 5 V logic clocks without external level shifters or clamping diodes, provided the input signal thresholds align with the 3.3 V VDD reference.

How does spread-spectrum clock tracking work in this device?

The PI6C2405A-1LEX's PLL dynamically adjusts its output frequency to follow modulated input clocks (typically ±0.25% to ±0.5% center-spread). This preserves timing relationships while spreading spectral energy, reducing peak EMI by up to 10 dB - verified in application notes using standard FCC radiated emissions test setups.

Is PI6C2405A-1LEX pin-compatible with PI6C2405A-1HLEX?

No - PI6C2405A-1LEX and PI6C2405A-1HLEX share identical pinout and package (8-TSSOP), but differ in drive strength: the -1H variant sources/sinks ±12 mA vs. ±8 mA for the -1 version. Load-dependent parameters (rise/fall time, skew) improve with -1H, but both require identical PCB layout and decoupling.