Texas Instruments DS110RT410SQE/NOPB

Overview

DS110RT410 from Texas Instruments is a quad-channel, low-power retimer IC for high-speed serial links, featuring adaptive CTLE (up to 34-dB boost at 5 GHz), CDR with ≈300 ps latency, and programmable transmit de-emphasis (–12 dB) and VOD (600–1300 mV_p-p). It operates across 8.5–11.3 Gbps and sub-rates (÷2/4/8) to support 10GbE, Fibre Channel, and InfiniBand in backplane and SFP+ optical interconnects.

For engineers reviewing the DS110RT410 datasheet, DS110RT410 pinout, DS110RT410 application, or DS110RT410 equivalent, this page delivers verified technical context, exact pin functions per channel, real-world retiming performance metrics, and validated alternative retimers for multi-rate serial link design and signal integrity validation.

Technical Context

The DS110RT410 implements independent per-channel retiming using a continuous-time linear equalizer (CTLE), clock and data recovery (CDR) with 5-MHz PLL bandwidth, and a CML-compatible differential driver with analog de-emphasis. Each channel adapts CTLE boost during lock acquisition and freezes EQ settings post-lock unless manually re-triggered.

It uses a 25-MHz ±100-ppm reference clock solely for VCO coarse calibration-not for PLL training-enabling fast lock (<74 ms on medium-loss channels) without requiring synchronous reference timing. Signal detection, CDR lock status, and eye opening monitoring are provided per channel via dedicated LVCMOS outputs and on-chip EOM/PRBS generator.

Key Specifications

Pinout & Package

DS110RT410 is housed in a thermally enhanced 48-pin WQFN package (7.0 mm × 7.0 mm, 0.5-mm pitch) with exposed thermal pad (DAP) requiring ≥4 vias to ground for optimal thermal performance and low-impedance reference.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS110DF410, DS110RT410 offers lower power (150 mW vs. 220 mW/channel) and simpler configuration but lacks DFE for crosstalk cancellation; compared with DS125RT410, it trades 1.2-Gbps headroom for reduced cost and qualification maturity in 10GbE infrastructure.

Availability

DS110RT410 is available at Aetrix Electronics and suitable for high-speed serial interconnects requiring stable component supply, including SFP+ optical modules, Ethernet switch fabric interfaces, and Fibre Channel storage systems.

Supply support for DS110RT410 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 high-speed interface solutions, with decades of expertise in signal integrity and timing ICs.

The DS110RT410 belongs to TI's retimer product line engineered specifically for multi-gigabit serial link restoration in datacenter, telecom, and enterprise networking equipment - emphasizing low latency, adaptive equalization, and robust CDR performance.

FAQ

What is the primary function of the DS110RT410 in a high-speed serial link?

The DS110RT410 acts as a quad-channel retimer that restores signal integrity by equalizing degraded input signals, recovering clean clock and data via CDR, and driving reconditioned outputs with programmable de-emphasis. Its core function is to extend reach and improve BER in lossy, crosstalk-impaired channels operating from 8.5 to 11.3 Gbps - directly enabling reliable 10GbE, Fibre Channel, and InfiniBand links where raw signals would otherwise fail. The DS110RT410 achieves this with ≈300 ps latency and adaptive CTLE up to 34 dB.

Does the DS110RT410 require an external reference clock, and what are its specifications?

Yes, the DS110RT410 requires a 25-MHz ±100-ppm crystal oscillator input on REFCLK_IN for VCO coarse calibration - not for PLL locking. This reference enables fast, robust CDR lock without synchronization to data rate. REFCLK_IN accepts 2.5-V LVCMOS signals with min pulse width of 4 ns and thresholds of 1.75 V (VIH) and 0.7 V (VIL). The device also provides a buffered 2.5-V REFCLK_OUT for daisy-chaining multiple DS110RT410 units on the same board.

How does the DS110RT410 handle signal detection and CDR lock monitoring?

The DS110RT410 includes per-channel signal detect circuitry that monitors input energy level (ON threshold: 70 mV_p-p at 10.3125 Gbps) and powers the high-speed path accordingly. Each channel asserts a dedicated LOCK_n output (2.5-V LVCMOS) high when CDR lock is achieved. These pins double as SMBus address straps (ADDR_n) read at power-up. An open-drain INT pin signals loss-of-signal, CDR unlock, or eye opening violations - all configurable via SMBus registers in the DS110RT410.

Can the DS110RT410 be configured without a microcontroller, and how?

Yes - the DS110RT410 supports autonomous configuration via SMBus master mode: tie EN_SMB floating and use READ_EN to trigger loading of initial settings from an external EEPROM on power-up. After EEPROM read completes (signaled by ALL_DONE going low), the DS110RT410 automatically switches to SMBus slave mode for runtime adjustments. This eliminates the need for an external controller during boot, while retaining full programmability for field tuning or protocol adaptation in the DS110RT410.

What thermal considerations apply to the DS110RT410 in a 4-channel deployment?

The DS110RT410 has a junction-to-board thermal resistance (RθJB) of 6.1°C/W and requires proper thermal management: the exposed DAP pad must connect to the PCB ground plane using ≥4 thermal vias. At full operation (four channels locked), typical power dissipation is 720 mW. With ambient up to +85°C, junction temperature stays within safe limits (≤125°C) if board-level thermal design maintains ≤20°C rise above ambient - verified using TI's thermal metrics in the DS110RT410 datasheet.