Texas Instruments SN65LVCP204RGZR

Overview

SN65LVCP204RGZR from Texas Instruments is a 4×4 non-blocking gigabit crosspoint switch IC for high-speed serial interconnects, supporting up to 2.5 Gbps per lane, featuring selectable transmit preemphasis (0–9 dB), receive equalization (5/12 dB), and integrated 100-Ω differential termination. It operates from a single 3.3-V supply and places outputs in high-impedance state when disabled - used in telecom/datacom backplane routing and wireless base station signal switching.

For engineers reviewing the SN65LVCP204RGZR datasheet, SN65LVCP204RGZR pinout, SN65LVCP204RGZR application, or SN65LVCP204RGZR equivalent, key selection criteria include deterministic jitter (30 ps peak-to-peak at 2.5 Gbps), VML-compatible differential I/O, flow-through QFN-48 layout compatibility, and LVTTL control interface timing with sub-ns propagation delay.

Technical Context

The SN65LVCP204RGZR implements a fully differential, non-blocking 4×4 crosspoint architecture with four independent 4:1 multiplexers - each output can route any of the four differential inputs. Its internal signal paths use VML signaling for low-power, high-speed operation while maintaining <25 ps output skew and 500 ps typical propagation delay.

It integrates receiver-side equalization (5 dB or 12 dB gain) and transmitter-side preemphasis (0/3/6/9 dB) to compensate for FR4 trace loss up to 43 inches; input biasing via VBB pin enables CML-level compatibility without external termination, and on-chip 100-Ω differential termination reduces PCB component count.

Key Specifications

Pinout & Package

SN65LVCP204RGZR is housed in a 48-pin VQFN (RGZ) package with 7 mm × 7 mm body, 0.5 mm pitch, and exposed thermal pad - designed for high-density PCB layouts with optimized thermal performance (θ_JA = 33°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed crosspoint switch applications.

Compared with SN65LVCP202RGZR and MAX14892ETL+, the SN65LVCP204RGZR uniquely combines 4×4 non-blocking routing, integrated 100-Ω termination, and CML/VML compatibility in a single 7-mm QFN - reducing design risk for telecom backplanes where signal integrity and layout simplicity are critical.

Availability

SN65LVCP204RGZR is available at Aetrix Electronics and suitable for wireless infrastructure, high-speed network routing, and telecom/datacom equipment requiring stable component supply across extended temperature ranges (–40°C to 85°C) and long production lifecycles.

Supply support for SN65LVCP204RGZR 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, clocking, and data conversion technologies.

The SN65LVCP204RGZR belongs to TI's LVCP (Low-Voltage CrossPoint) family, engineered specifically for high-speed serial interconnects in telecom, wireless, and datacenter systems where deterministic jitter, low power, and layout efficiency are design-critical.

FAQ

What is the maximum supported data rate for SN65LVCP204RGZR?

The SN65LVCP204RGZR supports up to 2.5 Gbps per lane under recommended operating conditions. This rating is validated across the full temperature range (–40°C to 85°C) with deterministic jitter specified at 30 ps peak-to-peak. Operation beyond 2.5 Gbps is not characterized and may degrade signal integrity; the device is not rated for 3.125-Gbps protocols like PCIe Gen2 without additional margin analysis.

Does SN65LVCP204RGZR require external termination resistors?

No, SN65LVCP204RGZR includes integrated 100-Ω differential termination on all outputs, eliminating the need for external resistors. This feature reduces PCB component count, saves board space, and improves impedance matching consistency. External termination is only required if custom load values (e.g., 80 Ω or 120 Ω) are needed - in which case the internal termination must be disabled per the datasheet configuration.

How does the EQ pin affect SN65LVCP204RGZR performance?

The EQ pin on SN65LVCP204RGZR selects between two equalization gain settings: EQ = 1 enables 5-dB gain (optimized for ~25-inch FR4 traces), and EQ = 0 enables 12-dB gain (for ~43-inch traces). This setting directly compensates for frequency-dependent loss and reduces deterministic jitter by up to 60 ps - verified with PRBS27–1 patterns at 2.5 Gbps. The EQ pin is sampled at power-up and remains latched during operation.

Can SN65LVCP204RGZR interface directly with CML drivers?

Yes, SN65LVCP204RGZR inputs are electrically compatible with CML signal levels (100–1750 mV_PP differential) and include internal biasing via the VBB pin. No level-shifting circuitry is required. AC coupling is recommended, and the input common-mode voltage (VICM) must remain within 1.5–1.6 V - achieved naturally with CML sources referenced to VBB.

What is the thermal pad connection requirement for SN65LVCP204RGZR?

The exposed thermal pad on SN65LVCP204RGZR must be soldered to a solid GND plane on the PCB - it is not optional. This connection provides critical thermal dissipation (θ_JB = 20°C/W) and mechanical stability. TI recommends using ≥8 vias (0.3-mm diameter) under the pad, filled or tented, and connecting them directly to an inner-layer GND plane. Failure to properly attach the thermal pad risks exceeding the 125°C max junction temperature under full-load operation.