Texas Instruments LMK5C33414ARGCR

Overview

LMK5C33414ARGCR from Texas Instruments is a 3-DPLL/3-APLL network synchronizer with BAW VCO, delivering 40fs typical RMS jitter at 491.52MHz and supporting 4 reference inputs, 14 differential outputs (expandable to 18 total), and JESD204B/C compliance for wireless infrastructure timing. It serves as a primary clock source in 5G mMIMO active antenna systems requiring ultra-low jitter, hitless switching, and IEEE 1588 PTP secondary clock functionality.

For engineers reviewing the LMK5C33414ARGCR datasheet, LMK5C33414ARGCR pinout, LMK5C33414ARGCR application, or LMK5C33414ARGCR equivalent, this device addresses critical timing requirements in CPRI/eCPRI baseband units, SyncE-compliant transport layers, and 112G/224G SerDes jitter cleaning-where sub-50fs jitter, programmable DPLL loop bandwidth (1mHz–4kHz), and PCIe Gen 1–6 compliance are mandatory selection criteria.

Technical Context

The LMK5C33414ARGCR integrates three digital phase-locked loops (DPLLs) paired with three analog PLLs (APLLs), where APLL3 uses TI's Bulk Acoustic Wave (BAW) technology to generate 491.52MHz with 40fs typical RMS jitter independent of input reference quality. DPLLs support digital holdover and hitless switching between four differential or single-ended inputs (1Hz–800MHz).

Output flexibility includes 14 differential channels (OUT[13:2]_P/N) configurable as HSDS, AC-LVPECL, LVDS, or HSCL, plus two LVCMOS outputs (OUT0/OUT1) supporting 1PPS/SYSREF, enabling up to 18 distinct frequency outputs (1Hz–1250MHz). The device operates across –40°C to 85°C and supports I²C or 3-/4-wire SPI programming with integrated EEPROM for custom startup profiles.

Key Specifications

Pinout & Package

LMK5C33414ARGCR is housed in a 64-pin RGC (VQFN) package measuring 9.00mm × 9.00mm with exposed thermal pad (DAP). Power domains are segmented per output bank and APLL block to minimize crosstalk and optimize noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar network synchronizer applications.

Compared with LMK5C33414ARGCR, LMK5C33414AS1 adds embedded PTP processing but requires firmware licensing, while LMK5B33414 trades 5fs jitter margin for lower cost and relaxed phase noise - making the original LMK5C33414ARGCR optimal for high-performance 5G infrastructure where jitter is non-negotiable.

Availability

LMK5C33414ARGCR is available at Aetrix Electronics and suitable for 5G wireless infrastructure, optical transport networks, and high-speed test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for LMK5C33414ARGCR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in precision timing and signal chain solutions.

The LMK5C33414ARGCR belongs to TI's LMK5C family of network synchronizers, engineered specifically for wireless communications infrastructure demanding ultra-low jitter, multi-standard synchronization, and JESD204B/C compliance in compact form factors.

FAQ

What is the primary timing function of the LMK5C33414ARGCR in 5G base station designs?

The LMK5C33414ARGCR serves as the central network synchronizer in 5G base stations, generating ultra-low-jitter clocks (e.g., 491.52MHz DEVCLK, 7.68MHz SYSREF) for RF transceivers and FPGAs while maintaining IEEE 1588 PTP secondary clock accuracy and hitless switching between SyncE, GPS, and 1PPS references. Its BAW APLL3 ensures consistent 40fs jitter performance regardless of input reference quality, directly supporting 3GPP beamforming phase coherence requirements in mMIMO systems.

Does the LMK5C33414ARGCR support PCIe Gen 6 reference clock generation?

Yes, the LMK5C33414ARGCR is explicitly compliant with PCIe Gen 1 through Gen 6 specifications. Its differential outputs (HSDS, AC-LVPECL, LVDS) can be configured to deliver 100MHz REFCLK with sub-1ps period jitter and controlled common-mode voltage, meeting PCI-SIG requirements for Gen 6 root complex and endpoint timing. Output skew between channels is guaranteed ≤80ps, ensuring deterministic inter-lane alignment in multi-lane x16 configurations.

How many independent frequency domains can the LMK5C33414ARGCR manage simultaneously?

The LMK5C33414ARGCR supports three independent synchronization domains via its triple DPLL/APLL architecture. Each DPLL can lock to a separate reference input (e.g., SyncE, GPS 1PPS, and recovered fronthaul clock), while associated APLLs generate domain-specific outputs - such as BAW APLL3 for radio front-end clocks, APLL2 for baseband processing, and APLL1 for control-plane timing - all with independent loop bandwidth and holdover behavior.

What is the role of Zero-Delay Mode (ZDM) in the LMK5C33414ARGCR?

Zero-Delay Mode (ZDM) in the LMK5C33414ARGCR enables precise, programmable phase alignment between any selected input reference and an output clock - critical for coherent multi-antenna systems. When enabled, ZDM adjusts internal delay paths to achieve near-zero phase offset (<50ps residual) between input and output edges, allowing deterministic timing relationships required for beamforming calibration and TDD frame boundary alignment in 5G NR deployments.

Can the LMK5C33414ARGCR generate both JESD204B and JESD204C-compatible clocks?

Yes, the LMK5C33414ARGCR is designed to support both JESD204B and JESD204C standards. Its 14 differential outputs can be configured for HSDS or AC-LVPECL formats with programmable swing (350–1000mVpp) and common-mode voltage (0.6–1.375V), meeting JESD204C's tighter jitter and slew-rate requirements. The device's 40fs typical jitter at 491.52MHz satisfies JESD204C's 100fs RMS limit for 25G+ lane rates, while its 1PPS/SYSREF outputs align with JESD204B subclass 1 timing models.