NXP Semiconductors MC100ES6039DW

Overview

MC100ES6039DW from Freescale Semiconductor is a 3.3 V ECL/PECL/HSTL/LVDS clock generation IC supporting synchronous ÷2/4 and ÷4/6 division with <50 ps output-to-output skew, >1.0 GHz max frequency, and dual-frequency select inputs (DIVSELa/DIVSELb). It operates in ECL (VEE = –3.135 V to –3.8 V) or PECL (VCC = 3.135 V to 3.8 V) mode and delivers precisely aligned differential outputs for high-speed timing distribution in telecom line cards.

For engineers reviewing the MC100ES6039DW datasheet, MC100ES6039DW pinout, MC100ES6039DW application, or MC100ES6039DW equivalent, key selection criteria include synchronous enable/disable timing referenced to the falling edge of CLK, master reset (MR) for multi-chip synchronization, VBB reference output for AC-coupled sinusoidal input, and compatibility with LVDS/HSTL inputs.

Technical Context

The MC100ES6039DW integrates two independent synchronous divider blocks - one for ÷2/4 (Q0/Q1) and another for ÷4/6 (Q2/Q3) - with internal flip-flops clocked on the falling edge of CLK. All outputs are differential ECL/PECL, and common edges across Q0–Q3 are precisely aligned due to synchronous internal architecture.

It supports three input configurations: differential ECL/PECL, single-ended ECL/PECL (with internal 75 kΩ pulldown/pullup), and AC-coupled sinusoidal sources via VBB. The EN signal is synchronous and only toggles state when the internal clock is LOW, eliminating runt pulses during enable/disable transitions.

Key Specifications

Pinout & Package

MC100ES6039DW is housed in a 20-lead SOIC package (Case 751D-07), Pb-free compliant, with exposed pad not present and standard SO-20 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC100EP6039DW and SY100EL39ZC, the MC100ES6039DW uniquely combines VBB-based AC coupling, LVDS/HSTL input flexibility, and synchronous enable - making it optimal for cost-sensitive telecom timing where 1 GHz performance suffices and signal integrity depends on bias-controlled interfaces.

Availability

MC100ES6039DW is available at Aetrix Electronics and suitable for SONET/SDH line cards, 10 Gigabit Ethernet PHY timing, and high-speed test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MC100ES6039DW 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

Freescale Semiconductor (now part of NXP Semiconductors) designed high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets before its 2015 acquisition.

The MC100ES6039DW belongs to Freescale's 100ES Advanced Clock Drivers family, engineered specifically for low-skew, multi-ratio clock distribution in telecom infrastructure and high-speed serial link subsystems.

FAQ

What is the recommended termination for MC100ES6039DW differential outputs?

Each differential output pair (e.g., Q0/Q0) must be terminated with a 50 Ω resistor to VCC–2.0 V in PECL mode or to VEE+2.0 V in ECL mode, per Figure 5 of the datasheet. This ensures proper signal integrity, minimizes reflections, and maintains specified VOH/VOL levels. Improper termination causes increased skew, jitter, and potential logic errors in downstream receivers. The MC100ES6039DW does not integrate termination resistors and relies on external matching.

Does MC100ES6039DW support single-ended clock inputs?

Yes, MC100ES6039DW supports single-ended ECL/PECL inputs using either CLK or CLK pin, with the other pin tied to VBB or appropriate bias. Internal 75 kΩ pulldown/pullup resistors ensure defined logic states when inputs float. However, differential operation is preferred for best noise immunity and skew performance. Single-ended use reduces input sensitivity and may increase jitter compared to differential drive.

How does the master reset (MR) pin affect MC100ES6039DW operation?

The MR pin asynchronously resets all internal divider flip-flops to a known state, ensuring synchronized startup across multiple MC100ES6039DW devices. For systems with only one MC100ES6039DW, MR is optional because internal design guarantees synchronization between ÷2/4 and ÷4/6 outputs. MR must be asserted at power-up in multi-chip configurations to prevent metastable or random phase relationships between boards or modules.

Can MC100ES6039DW operate with LVDS input signals without level-shifting?

Yes, MC100ES6039DW is explicitly LVDS and HSTL input compatible per datasheet Table 5 and Features list. Its input thresholds (VIH/VIL) and common-mode range (VCMR = VEE+0.2 V to VCC–0.7 V) accommodate standard LVDS signaling (±350 mV around 1.2 V). No external level shifter is required, simplifying interface to FPGAs and ASICs with LVDS I/O banks.

What is the function of the VBB pin on MC100ES6039DW?

The VBB pin on MC100ES6039DW provides a stable DC reference voltage (typically VCC–1.3 V) used to bias AC-coupled sinusoidal clock sources, such as crystal oscillators. This allows direct injection of low-jitter sine waves without external bias networks. VBB eliminates the need for resistive dividers or active buffers, preserving signal integrity and reducing component count in RF and precision timing applications.