NXP Semiconductors TFF11115HN/N1,111

Overview

TFF11115HN/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 11.30 GHz to 11.80 GHz, achieves −97 dBc/Hz synthesizer phase noise at 100 kHz offset (with divider = 64), supports reference inputs from 44 MHz to 738 MHz, and complies with IESS-308 phase noise requirements.

For engineers reviewing the TFF11115HN/N1,111 datasheet, TFF11115HN/N1,111 pinout, TFF11115HN/N1,111 application, or TFF11115HN/N1,111 equivalent, this device requires attention to VCO tuning voltage range (0.1–0.9 × VREGVCO), third/fourth-order PLL configuration, differential RF output termination, and strict divider setting stability during operation - all critical for Ku-band VSAT LO design integrity.

Technical Context

The TFF11115HN/N1,111 integrates a fully integrated PLL with VCO, programmable divider (16/32/64/128/256), charge pump, phase-frequency detector, and dual differential RF output buffers. Its loop filter supports type-2 or type-3 configurations using internal 10 pF and 30 pF capacitors between CPOUT/VREGVCO and VTUNE/VREGVCO.

VCO regulation is stabilized via VREGVCO (pin 1, 2.7 V typical), enabling precise tuning voltage control; lock detection uses a window comparator on VTUNE with 7%–93% thresholds of VREGVCO and 0.1 V hysteresis, delivering CMOS-compatible LCKDET (2.5 V high in lock). Reference input is fully differential (IN(REF)_P/N), high-impedance, and AC-coupled.

Key Specifications

Pinout & Package

HVQFN24 package (SOT616-1): plastic thermal-enhanced very thin quad flat package, 4 × 4 × 0.85 mm body, 24 terminals, exposed diepad for thermal and ground connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC738LP4E and ADF4351BCPZ, the TFF11115HN/N1,111 uniquely combines native Ku-band output, IESS-308 validation, integrated differential reference input, and fixed-integer divider - making it the only drop-in solution for certified VSAT upconverter designs without external frequency multiplication or loop component redesign.

Availability

TFF11115HN/N1,111 is available at Aetrix Electronics and suitable for Ku-band VSAT upconverters, satellite transceivers, Intelsat-compliant ground stations, and low-spur point-to-point radios requiring stable component supply and long-term obsolescence management.

Supply support for TFF11115HN/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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and communication infrastructure markets.

The TFF11115HN/N1,111 belongs to NXP's high-frequency RF synthesizer product line, engineered specifically for Ku-band satellite communications systems requiring ultra-low phase noise, regulatory compliance, and high integration in thermally constrained SMT packages.

FAQ

What is the guaranteed RF output frequency range of the TFF11115HN/N1,111?

The TFF11115HN/N1,111 guarantees an RF output frequency range of 11.30 GHz to 11.80 GHz under all operating conditions specified in Table 10. This native Ku-band output eliminates the need for external frequency multipliers in VSAT upconverter designs and is validated across −40 °C to +85 °C ambient temperature.

Does the TFF11115HN/N1,111 support fractional-N synthesis?

No, the TFF11115HN/N1,111 implements an integer-N PLL architecture only, with five fixed divider settings: 16, 32, 64, 128, and 256. Divider selection is controlled by NSL0–NSL2 pins and must remain static after power-up; fractional division or dynamic reconfiguration is not supported in the TFF11115HN/N1,111.

How is phase noise compliance with IESS-308 verified for the TFF11115HN/N1,111?

IESS-308 compliance for the TFF11115HN/N1,111 is verified at −97 dBc/Hz typical phase noise @ 100 kHz offset when using divider = 64 and a reference signal with −149 dBc/Hz phase noise at the same offset. This measurement condition is explicitly defined in Table 12 and forms the basis for Intelsat-certified VSAT system qualification.

Can the TFF11115HN/N1,111 drive a 50 Ω single-ended load directly?

Yes - each differential output (BUF1_P/N or BUF2_P/N) can drive a 50 Ω single-ended load by terminating the complementary pin with 50 Ω to ground or VCC, as shown in Figure 8. The TFF11115HN/N1,111 delivers −4 dBm typical single-ended output power with proper AC coupling and DC blocking, per Table 12.

What is the function of the VREGVCO pin on the TFF11115HN/N1,111?

VREGVCO (pin 1) provides a regulated 2.7 V output that serves as the reference voltage for the VCO tuning range (0.1–0.9 × VREGVCO) and supplies the internal loop filter capacitors. External loop filter components must connect directly to VREGVCO - it is not an input but a stabilized bias rail critical for VCO linearity and phase noise performance in the TFF11115HN/N1,111.