NXP Semiconductors TFF11084HN/N1,111

Overview

TFF11084HN/N1,111 from NXP Semiconductors is a Ku-band frequency generator IC designed as a low-phase-noise local oscillator (LO) for VSAT upconverters and transceivers. It delivers RF output from 8.20 GHz to 8.60 GHz, achieves −97 dBc/Hz synthesizer phase noise at 100 kHz offset (with 64× division), and operates from a 3.3 V supply drawing 100–130 mA - enabling high-fidelity LO synthesis in satellite ground terminals.

For engineers reviewing the TFF11084HN/N1,111 datasheet, TFF11084HN/N1,111 pinout, TFF11084HN/N1,111 application, or TFF11084HN/N1,111 equivalent, this page provides verified functional context, validated HVQFN24 pin mapping, confirmed IESS-308 compliance, and real-world design constraints for PLL loop filter implementation and differential RF buffer interfacing.

Technical Context

The TFF11084HN/N1,111 integrates a third- or fourth-order PLL with a voltage-controlled oscillator (VCO), programmable divider (16/32/64/128/256), charge pump (1 mA typical), and dual differential RF output buffers. Its VCO regulator (VREGVCO, pin 1) supplies a stable 2.7 V reference for loop filtering, and internal 10 pF/30 pF capacitors support type-2 or type-3 loop filter topologies.

Phase noise performance is tightly coupled to reference input quality: required reference phase noise ranges from −134 dBc/Hz (at 16× division) to −151 dBc/Hz (at 256× division) at 100 kHz offset. Divider settings are fixed at startup via NSL0–NSL2 pins (pins 4–6), and lock detection (LCKDET, pin 7) outputs CMOS-compatible 0 V / 2.5 V signals with 10 μs attack/decay timing.

Key Specifications

Pinout & Package

HVQFN24 package (SOT616-1): 4 × 4 × 0.85 mm body, thermally enhanced, leadless, 24-terminal layout with exposed diepad for grounding and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-phase-noise Ku-band LO generator applications.

Compared with LMX2594RHBR and HMC703LP4E, the TFF11084HN/N1,111 offers superior integration for fixed-ratio Ku-band VSAT LO generation - eliminating SPI firmware, external VCOs, and complex loop filter optimization while delivering IESS-308 compliance in a compact HVQFN24 package.

Availability

TFF11084HN/N1,111 is available at Aetrix Electronics and suitable for VSAT upconverter designs, Ku-band transceiver development, and Intelsat-compliant ground terminal production requiring stable component supply and long-term lifecycle assurance.

Supply support for TFF11084HN/N1,111 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communication infrastructure markets.

The TFF11084HN/N1,111 belongs to NXP's high-frequency RF synthesizer product line, engineered specifically for satellite communications applications demanding ultra-low phase noise, Ku-band frequency coverage, and IESS-308 compliance in compact, thermally efficient packages.

FAQ

What is the guaranteed RF output frequency range for the TFF11084HN/N1,111?

The TFF11084HN/N1,111 guarantees an RF output frequency range of 8.20 GHz to 8.60 GHz under all specified operating conditions, including ambient temperatures from −40°C to +85°C and supply voltages from 3.0 V to 3.6 V. This range is intrinsic to the integrated VCO and is not extended by external components or configuration changes.

Does the TFF11084HN/N1,111 support fractional-N synthesis?

No, the TFF11084HN/N1,111 implements an integer-N PLL architecture only, with fixed divider values of 16, 32, 64, 128, or 256 selected via NSL0–NSL2 pins. It does not include a sigma-delta modulator or fractional divider, so it cannot synthesize frequencies with sub-Hz resolution or arbitrary spacing within the 8.2–8.6 GHz band.

How is phase noise compliance with IESS-308 verified for the TFF11084HN/N1,111?

IESS-308 compliance for the TFF11084HN/N1,111 is verified at −97 dBc/Hz typical synthesizer phase noise measured at 100 kHz offset, using a 64× division ratio and a reference signal with −149 dBc/Hz phase noise at the same offset. This measurement condition is explicitly defined in the official NXP product data sheet Rev. 2 (14 April 2011).

Can the TFF11084HN/N1,111 operate with a single-ended reference input?

Yes, the TFF11084HN/N1,111 accepts single-ended reference inputs via IN(REF)_P (pin 9) while terminating IN(REF)_N (pin 10) with the same impedance as the driving source (e.g., 50 Ω to ground). The internal differential pair remains biased correctly, and AC coupling remains mandatory regardless of drive mode.

What are the thermal limitations and PCB layout recommendations for the TFF11084HN/N1,111?

The TFF11084HN/N1,111 has a junction-to-solder-point thermal resistance (Rth(j-sp)) of 25 K/W and a maximum junction temperature of +125°C. For reliable operation, the exposed diepad (connected to multiple GND pins) must be soldered to a minimum 100 mm² copper pour with ≥4 thermal vias to inner ground planes - failure to do so risks thermal shutdown or accelerated parametric drift.