Texas Instruments EQ50F100LR/NOPB

Overview

EQ50F100LR/NOPB from Texas Instruments is a fixed receive-end backplane equalizer IC designed to compensate for high-frequency loss in FR-4 striplines up to 30 inches at data rates from 1 Gbps to 6.25 Gbps. It features differential CML I/O, on-chip 100 Ω input and 50 Ω output terminations, 35 ps residual deterministic jitter at 5 Gbps, and operates from a single 1.8 V supply consuming 85 mW in a 3 mm × 3 mm 6-pin LLP (WSON-NGG) package.

For engineers reviewing the EQ50F100LR/NOPB datasheet, EQ50F100LR/NOPB pinout, EQ50F100LR/NOPB application, or EQ50F100LR/NOPB equivalent, this device serves as a critical signal integrity component in high-speed serial backplane interconnects for telecom switch fabrics, line cards, and multi-gigabit Ethernet systems where deterministic jitter reduction and channel loss compensation are essential.

Technical Context

The EQ50F100LR/NOPB implements a fixed analog equalization filter followed by a limiting amplifier and offset cancellation circuit to correct duty-cycle distortion. Its architecture targets deterministic jitter reduction in bandwidth-limited FR-4 channels without requiring adaptive control or external configuration.

It uses current-mode logic (CML) for both input and output stages: differential inputs present 100 Ω termination, while outputs feature internal 50 Ω pull-up to VDD. AC coupling is required at both ends, and the device supports code-independent operation across PRBS-7/10/15 and K28.5 patterns.

Key Specifications

Pinout & Package

The EQ50F100LR/NOPB is housed in a 3 mm × 3 mm leadless plastic WSON package (TI designation NGG) with an exposed thermal pad. Pin 1 is IN−, and the pinout follows a feed-through configuration optimized for minimal trace length and impedance continuity in high-speed routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with EQ50F100LR/NOPB, DS100BR111SD/NOPB adds CDR and adaptivity at cost of latency and power, while LMH0384SQ/NOPB targets video standards with incompatible equalization tuning - making EQ50F100LR/NOPB the optimal choice for fixed, low-latency, FR-4–optimized 1–6.25 Gbps backplane equalization.

Availability

EQ50F100LR/NOPB is available at Aetrix Electronics and suitable for telecom switch fabric interconnects, high-speed line card backplanes, and 10GbE backplane systems requiring stable component supply and long-term design-in support.

Supply support for EQ50F100LR/NOPB 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The EQ50F100LR/NOPB belongs to TI's high-speed signal conditioning product line, engineered specifically for deterministic jitter suppression and loss compensation in FR-4 backplane serial interconnects operating from 1 Gbps to 6.25 Gbps.

FAQ

What is the primary function of the EQ50F100LR/NOPB in a high-speed backplane system?

The EQ50F100LR/NOPB functions as a fixed receive-end equalizer that compensates for frequency-dependent loss and reduces deterministic jitter induced by FR-4 backplane traces. It restores signal integrity for data rates from 1 Gbps to 6.25 Gbps without requiring adaptation or training, making it ideal for low-latency, protocol-agnostic backplane links. The EQ50F100LR/NOPB achieves this using an analog filter, limiting amplifier, and offset cancellation circuit within a compact 3 mm × 3 mm LLP package.

Does the EQ50F100LR/NOPB require external termination resistors on its CML I/O pins?

No, the EQ50F100LR/NOPB integrates on-chip termination: a 100 Ω differential resistor between IN+ and IN−, and 50 Ω single-ended pull-ups from OUT+ and OUT− to VDD. This eliminates the need for external termination components, simplifying PCB layout and improving impedance matching consistency. The EQ50F100LR/NOPB still requires AC coupling capacitors on both input and output paths per TI application guidance.

What is the maximum FR-4 trace length the EQ50F100LR/NOPB can reliably equalize at 6.25 Gbps?

The EQ50F100LR/NOPB is validated to recover 6.25 Gbps signals after 30 inches of FR-4 stripline with backplane connectors at both ends, as confirmed in TI's SNOSAB8D datasheet using K28.5 test patterns. At this length, residual deterministic jitter remains ≤0.4 UIP-P. Performance beyond 30 inches depends on specific stackup loss characteristics but is not guaranteed by TI's characterization. The EQ50F100LR/NOPB is optimized for this 30-inch benchmark under standard FR-4 dielectric and trace geometry conditions.

Can the EQ50F100LR/NOPB operate with power supplies other than 1.8 V?

The EQ50F100LR/NOPB is specified for operation with a nominal 1.8 V supply, with recommended range of 1.71 V to 1.89 V (±5%). Operation outside this range risks parametric degradation or functional failure; absolute maximum VDD is +2.5 V, but extended operation above 1.89 V voids guaranteed performance. TI does not characterize or support alternate supply voltages. All published specifications - including jitter, power consumption, and equalization depth - apply strictly at 1.8 V. The EQ50F100LR/NOPB must be powered from a well-regulated 1.8 V rail with proper local bypassing.

Is the EQ50F100LR/NOPB pin-compatible with other TI equalizers such as the EQCO50F100 or EQCO50F200?

No, the EQ50F100LR/NOPB is not pin-compatible with EQCO50F100 or EQCO50F200. Those are different devices with distinct pinouts, package types (e.g., QFN), and internal architectures. The EQ50F100LR/NOPB uses a 6-pin WSON-NGG package with feed-through pin assignment (IN−, GND, OUT−, OUT+, VDD, IN+), whereas EQCO-series parts have different terminal counts and functions. Substitution requires PCB layout revision. Always verify pin mapping and signal routing against the respective datasheets before replacement. The EQ50F100LR/NOPB is a standalone solution with no drop-in alternatives in TI's portfolio.