PCKEP14PW,118

Clock Buffers, Drivers Overview

The PCKEP14PW,118 is a low skew 1-to-5 differential clock driver manufactured by NXP USA Inc. in a TSSOP20 package. It accepts two clock sources via an input multiplexer and supports ECL, PECL, HSTL, and LVDS input signals. The device operates in PECL/HSTL mode with VCC = 2.375 V to 3.8 V (VEE = 0 V) or NECL mode with VCC = 0 V (VEE = −2.375 V to −3.8 V). Key electrical parameters include a maximum toggle frequency exceeding 2 GHz, typical propagation delay of 400 ps, within-device skew of 25 ps, and part-to-part skew of 100 ps. It features synchronous enable control to prevent runt pulses.

Clock Buffers, Drivers Feature Summary

• Low skew performance: 25 ps within-device and 100 ps part-to-part
• High-speed operation: Maximum frequency > 2 GHz typical
• Dual input multiplexer supporting ECL, PECL, HSTL, and LVDS inputs
• Synchronous enable (EN) prevents runt clock pulses during state changes

Clock Buffers, Drivers Applications

• Clock distribution in high-performance digital systems
• Systems requiring tight output-to-output skew specifications
• PECL and HSTL compatible logic architectures

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix '118' against current manufacturer documentation to confirm packaging details and availability status. Ensure that the TSSOP20 package variant matches the design footprint requirements. Confirm moisture sensitivity level and reflow soldering profile compliance before integration into production assemblies.

Clock Buffers, Drivers Selection Notes

Select this component when differential clock distribution with minimal skew is required for 2.5 V or 3.3 V systems. The internal multiplexer allows selection between two clock inputs based on the CLK_SEL pin state. Ensure proper termination with 50 Ω resistors to VTT (VCC - 2.0 V) for all differential outputs to maintain signal integrity and skew specifications.

Clock Buffers, Drivers Part Context

The PCKEP14 series includes variants such as PCKEP14D (SO20) and PCKEP14PW (TSSOP20). The PW suffix specifically denotes the plastic thin shrink small outline package with 20 leads and a body width of 4.4 mm. This family is designed for applications demanding precise timing synchronization across multiple downstream loads.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult official NXP/Philips Semiconductors documentation for potential cross-references or updated product recommendations.

Clock Buffers, Drivers FAQ

How does the enable function operate?

The enable (EN) input is synchronous. Outputs are enabled or disabled in the LOW state, avoiding runt clock pulses that can occur with asynchronous control. The internal flip-flop is clocked on the falling edge of the input clock.

What are the power supply configurations?

The device supports PECL/HSTL mode with VCC = 2.375 V to 3.8 V and VEE = 0 V, or NECL mode with VCC = 0 V and VEE = −2.375 V to −3.8 V.

How should unused differential outputs be handled?

If a differential output pair is unused, both outputs may be left open (unterminated) without affecting the skew specification of other active outputs.