Texas Instruments DS250DF410ABMT

Overview

DS250DF410ABMT from Texas Instruments is a quad-channel 25 Gbps multi-rate retimer IC with integrated CDR, adaptive CTLE/DFE equalization, and 2×2 crosspoint switching per channel pair. It operates from a single 2.5 V supply, supports data rates from 20.2752 to 25.8 Gbps (including 10.3125 Gbps and 12.5 Gbps sub-rates), delivers <500 ps typical latency at 25.78125 Gbps, and enables jitter cleaning in front-port optical modules and active cable assemblies.

For engineers reviewing the DS250DF410ABMT datasheet, DS250DF410ABMT pinout, DS250DF410ABMT application, or DS250DF410ABMT equivalent, this page provides verified technical context on its retiming architecture, SMBus/JTAG configuration interface, differential I/O termination, power sequencing requirements, and compatibility with IEEE 802.3bj 100GbE, InfiniBand EDR, and OIF-CEI-25G-LR/MR/SR/VSR interfaces.

Technical Context

The DS250DF410ABMT implements independent per-channel CDRs with PLL bandwidths of 5.3 MHz (10.3125 Gbps) and 5.5 MHz (25.78125 Gbps), enabling robust lock acquisition across multi-rate serial links. Its signal conditioning stack includes adaptive CTLE (with programmable gain), full 5-tap DFE, and low-jitter 3-tap FIR transmit filtering - collectively supporting up to 35+ dB channel loss at 12.9 GHz.

Configuration is handled via SMBus slave/master modes or JTAG, with address strapping (ADDR0/ADDR1) enabling 16 unique device addresses. The device uses AC-coupled differential I/Os (RX/TX pairs) with on-chip 100-Ω differential input termination and 50-Ω output drivers, and requires no external reference clock - simplifying system-level timing design.

Key Specifications

Pinout & Package

DS250DF410ABMT is housed in a 6.00 mm × 6.00 mm, 101-pin flip-chip CSP (FC/CSP) package (ABM variant), optimized for high-density routing with flow-through I/O placement. High-speed differential pins are AC-coupled; SMBus and control pins are 2.5 V/3.3 V tolerant with defined pull-up/down configurations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS250DF210ABMT and DS125DF410ABMT, the DS250DF410ABMT uniquely delivers full 4-channel 25 Gbps retiming with DFE and 35+ dB equalization - making it the only TI option qualified for IEEE 802.3bj KR4 and OIF-CEI-25G-LR compliance in single-package solutions.

Availability

DS250DF410ABMT is available at Aetrix Electronics and suitable for high-speed interconnect design, 100GbE switch/router development, and active optical cable manufacturing requiring stable component supply and long-term lifecycle support.

Supply support for DS250DF410ABMT 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 serial connectivity ICs.

The DS250DF410ABMT belongs to TI's high-speed retimer product line, designed specifically for next-generation Ethernet, InfiniBand, and optical interconnect applications demanding ultra-low latency, multi-rate flexibility, and integrated diagnostics.

FAQ

What data rates does the DS250DF410ABMT support?

The DS250DF410ABMT supports continuous locking from 20.2752 Gbps to 25.8 Gbps at full rate, plus sub-rates including 10.3125 Gbps and 12.5 Gbps (÷2), and 5.0688–6.45 Gbps (÷4). This enables Forward Error Correction pass-through and compatibility with IEEE 802.3bj, InfiniBand EDR, and OIF-CEI-25G-LR/MR/SR/VSR standards. All four channels operate independently across this range.

Does the DS250DF410ABMT require an external reference clock?

No, the DS250DF410ABMT does not require an external low-jitter reference clock. It uses an internal VCO calibrated by a 25 MHz ±100 ppm single-ended CMOS clock applied to CAL_CLK_IN - which has relaxed phase noise and jitter requirements. This eliminates clock distribution complexity and reduces system BOM cost compared to traditional retimers.

How is the DS250DF410ABMT configured - SMBus or JTAG?

The DS250DF410ABMT supports configuration via SMBus (slave or master mode) or JTAG. SMBus address is set using 4-level ADDR0/ADDR1 straps; EN_SMB selects mode (float = master, VDD = slave, GND = JTAG). In JTAG mode, CAL_CLK_IN becomes TDI and CAL_CLK_OUT becomes TDO. Both interfaces allow full register access for equalizer tuning, interrupt setup, and diagnostics.

What is the power supply requirement for the DS250DF410ABMT?

The DS250DF410ABMT requires a single 2.5 V ±5% supply (2.375–2.625 V) on VDD pins. TI recommends placing at least six decoupling capacitors - four 0.1 µF and two 1 µF - as close as possible to the device. Total active current ranges from 470 mA to 665 mA depending on enabled features (e.g., full DFE + crosspoint = 665 mA), while idle current is 132–200 mA.

Can the DS250DF410ABMT be used in optical module designs?

Yes, the DS250DF410ABMT is explicitly designed for front-port optical module applications. Its ultra-low latency (<500 ps), integrated CDR, and adaptive equalization make it ideal for resetting jitter budgets and extending reach in SFP28, QSFP28, and CFP2/CFP4 modules. The device supports AC-coupled differential I/Os compatible with common optical driver/receiver interfaces and includes on-chip eye monitoring for in-module diagnostics.