Texas Instruments DS100RT410SQ/NOPB

Overview

DS100RT410 from Texas Instruments is a four-channel low-power retimer IC for 10-GbE serial data links, integrating adaptive CTLE, CDR, and programmable de-emphasis drivers per channel. It operates at 10.3125 Gbps, achieves <1×10⁻¹⁵ BER over lossy channels, and delivers ≈300 ps latency with 34-dB equalization boost at 5 GHz. It is used in SFP+ optical modules and backplane reach extension.

For engineers reviewing the DS100RT410 datasheet, DS100RT410 pinout, DS100RT410 application, or DS100RT410 equivalent, this page provides verified technical context, real-world signal integrity performance, SMBus configuration details, thermal design guidance, and validated alternative options for high-speed serial link retiming.

Technical Context

The DS100RT410 implements independent per-channel CDRs with PLL bandwidth of 5 MHz and sinusoidal jitter tolerance of 0.6 UI (10 kHz–250 MHz). Each channel includes a fully adaptive 4-stage CTLE that freezes its boost setting post-lock and supports manual re-adapt via SMBus register control.

Its output driver delivers adjustable VOD (600–1300 mV_p-p) and analog de-emphasis (0 to –12 dB), with rise/fall times configurable between 39 ps (full slew) and 50 ps (limited slew). The device supports two reference clock modes: ref_mode 0 (no external clock required) and ref_mode 3 (25 MHz ±100 ppm input).

Key Specifications

Pinout & Package

DS100RT410 is housed in a 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 thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS100DF410, DS100RT410 trades DFE-based crosstalk suppression for lower power and deterministic CTLE behavior; compared with DS125RT410, it sacrifices rate flexibility for optimized 10.3125-Gbps efficiency and reduced BOM cost.

Availability

DS100RT410 is available at Aetrix Electronics and suitable for 10GBASE-SR optical transceivers, SFP+ direct-attach copper assemblies, and backplane reach extension requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.

Supply support for DS100RT410 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 company specializing in analog, embedded processing, and high-speed interface solutions, with decades of leadership in signal integrity and timing products.

The DS100RT410 belongs to TI's high-speed retimer family designed specifically for 10-GbE infrastructure-targeting optical modules, switch fabric interconnects, and enterprise backplanes where low latency, adaptive equalization, and SMBus configurability are critical.

FAQ

What is the primary function of the DS100RT410 in a 10-GbE system?

The DS100RT410 functions as a four-channel retimer that restores signal integrity in degraded high-speed serial links. It recovers clean clock and data from noisy or attenuated 10.3125-Gbps inputs using adaptive CTLE, CDR, and programmable de-emphasis. In each channel of the DS100RT410, this process achieves <1×10⁻¹⁵ BER and ≈300 ps latency, making it essential for SFP+, backplanes, and switch fabric interconnects.

Does the DS100RT410 require an external reference clock to operate?

The DS100RT410 supports two operational modes: ref_mode 0 (no external reference clock required) and ref_mode 3 (25 MHz ±100 ppm reference clock required). In ref_mode 0, the DS100RT410 locks autonomously to 10.3125 Gbps; in ref_mode 3, the external clock accelerates initial lock acquisition. Both modes are fully supported in the DS100RT410, with ref_mode 3 being the default configuration.

How does the DS100RT410 differ from the DS100DF410?

The DS100RT410 uses a continuous-time linear equalizer (CTLE), while the DS100DF410 replaces it with a decision-feedback equalizer (DFE). This makes the DS100DF410 more effective against deterministic jitter from crosstalk but increases power consumption to 180 mW/channel versus 150 mW/channel for the DS100RT410. Both share identical pinout, SMBus interface, and 10.3125-Gbps capability.

Can the DS100RT410 be used for 1-GbE applications?

Yes-the DS100RT410 supports 1.25-Gbps Ethernet (1-GbE) operation within its specified bit-rate range of 1.2–10.6 Gbps. For 1-GbE, the CDR must be bypassed by setting override bit 5 of register 0x09 and configuring data mux bits [7:5] of register 0x1E. This mode retains signal detect and CTLE functionality while disabling CDR locking, enabling use in legacy Gigabit systems.

What thermal considerations apply to the DS100RT410 in a 7 mm × 7 mm WQFN package?

The DS100RT410 has a junction-to-board thermal resistance (RθJB) of 6.3°C/W and requires its exposed thermal pad (DAP) to be connected to the PCB ground plane with at least four thermal vias. Under typical conditions (660 mW total power, no airflow, 4-layer JEDEC board), the junction temperature rise is ~42°C above ambient-so at 85°C ambient, junction temperature reaches ~127°C, well below the 150°C absolute maximum rating.