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NCN5120MNTWG

Public Made by Adom

by adom

onsemi Interface - Specialized, QFN-40(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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NCN5120MNTWG

onsemi · Interface - Specialized · QFN-40(6x6)

NCN5120MNTWG from onsemi, in a QFN-40(6x6). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VSSA power_in Analog supply voltage ground.
2 VBUS2 power_in Ground for the KNX transmitter.
3 TXO output KNX transmitter analog output (Type 1, 60 V protected structure).
4 CCP passive AC coupling external capacitor connection (analog I/O, Type 2).
5 CAV passive Capacitor connection to the average bus DC voltage (analog I/O, Type 3).
6 VBUS1 power_in KNX power supply input (Type 5).
7 CEQ1 passive Capacitor connection 1 for defining the equalization pulse (analog I/O, Type 4).
8 CEQ2 passive Capacitor connection 2 for defining the equalization pulse (analog I/O, Type 4).
9 VFILT passive Filtered bus voltage (supply, Type 5).
10 V20V power_out 20 V supply output (Type 5).
11 VDD2MV input Voltage monitor of Voltage Regulator 2 (analog input, Type 8).
12 VDD2MC input Current monitor input 1 of Voltage Regulator 2 (analog input, Type 9).
13 VDD2 input Current monitor input 2 of Voltage Regulator 2 (analog input, Type 8).
14 VSS2 power_in Voltage Regulator 2 ground.
15 VSW2 output Switch output of Voltage Regulator 2 (analog output, Type 6).
16 VIN power_in Power supply input for Voltage Regulators 1 and 2 (Type 5).
17 VSW1 output Switch output of Voltage Regulator 1 (analog output, Type 6).
18 VSS1 power_in Voltage Regulator 1 ground.
19 VDD1 input Current input 2 and voltage monitor input of Voltage Regulator 1 (analog input, Type 8).
20 VDD1M input Current monitor input 1 of Voltage Regulator 1 (analog input, Type 9).
21 NC unconnected Not connected (do not connect).
22 NC unconnected Not connected (do not connect).
23 MODE1 input Mode selection input 1 (digital input, Type 12).
24 MODE2 input Mode selection input 2 (digital input, Type 12).
25 TREQ input Transmit request input (digital input, Type 12).
26 CSB/UC1 bidirectional Chip select output (SPI) or configuration input (UART), type depending on MODE1/MODE2 state.
27 SDI/RXD input Serial data input (SPI) or receive input (UART) (digital input, Type 14).
28 SDO/TXD output Serial data output (SPI) or transmit output (UART) (digital output, Type 13).
29 SCK/UC2 bidirectional Serial clock output (SPI) or configuration input (UART), type depending on MODE1/MODE2 state.
30 VDDD power_in Digital supply voltage input (Type 7).
31 VSSD power_in Digital supply voltage ground.
32 XCLK output Oscillator clock output (digital output, Type 13).
33 XSEL input Clock selection, quartz or digital clock (digital input, Type 12).
34 XTAL2 bidirectional Clock generator output (quartz) or input (digital clock), depending on XSEL.
35 XTAL1 input Clock generator input for quartz (analog input, Type 10).
36 SAVEB output Save signal, open drain with pull-up (digital output, Type 15).
37 RESETB output Reset signal, open drain with pull-up (digital output, Type 15).
38 FANIN/WAKE input Fan-in and wake-up input (digital input, Type 11).
39 TESTOUT unconnected Test output (analog output); do not connect.
40 VDDA power_in Analog supply voltage input (Type 7).
41 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer onsemi
Package QFN-40(6x6)
Category Interface ICs
Pins 41

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
KNX Transmitter Output Voltage VTXO -0.3 45 V 6
KNX Transmitter Output Current ITXO 250 mA Room temperature, 27 ohm shunt resistor for transmitter, 250 mA over temperature range 6
Voltage on CCP-pin VCCP -10.5 14.5 V 6
Voltage on VBUS1-pin VBUS1 -0.3 45 V 6
Current Consumption VBUS1-pin IBUS1 0 60 mA 6
Voltage on VFILT-pin VFILT -0.3 45 V 6
Voltage on V20V-pin V20V -0.3 25 V 6
Voltage on VDD2MC-pin VDD2MC -0.3 45 V 6
Voltage on VDD2-pin VDD2 -0.3 45 V 6
Voltage on VSW1- and VSW2-pin VSW -0.3 45 V 6
Voltage on VIN-pin VIN -0.3 45 V 6
Voltage on VDD1-pin VDD1 -0.3 3.6 V 6
Voltage on digital pins VDIG -0.3 3.6 V MODE1, MODE2, TREQ, CSB/UC1, SDI/TXD, SDO/RXD, SCK/UC2, XCLK, XSEL, SAVEB, RESETB, FANIN/WAKE 6
Storage temperature TST -55 150 °C 6
Junction Temperature TJ -25 155 °C 6
Human Body Model ESD immunity VHBM -2 2 kV JEDEC JESD22-A114 6
VBUS1 Voltage VBUS1 20 33 V DC value 7
Digital and Analog Supply Voltage VDD 3.13 3.47 V VDDD and VDDA pins 7
Input Voltage DC-DC Converter 1 and 2 VIN 8.47 33 V 7
Input Voltage on VDD1-pin VDD1 3.13 3.47 V 7
Input Voltage on VDD2-pin VDD2 3.1 21 V 7
Ambient Temperature TA -25 85 °C 7
Junction Temperature TJ -25 125 °C 7
Sleep Mode Current Consumption ISLEEP 1.35 1.8 mA 7
Undervoltage release level VBUSH 17.1 18 18.9 V VBUS1 rising, see Figure 4 7
Undervoltage trigger level VBUSL 15.9 16.8 17.7 V VBUS1 falling, see Figure 4 7
Bus bus DC voltage VBUS1 20 33 V Excluding active and equalization pulse 7
Digital Power Supply VDDD 3.13 3.3 3.47 V 7
Analog Power Supply VDDA 3.13 3.3 3.47 V 7
Bus Coupler Current Limitation Icoupler_lim 13 30 mA FANIN/WAKE = 1, VFILT > VFILTH 7
Bus Coupler Current Limitation Icoupler_lim 26 60 mA FANIN/WAKE = 0, VFILT > VFILTH 7
Coupler Voltage Drop Vcoupler_drop 3.5 6.5 V IBUS1 = 12 mA, Vcoupler_drop = VBUS1 - VFILT 8
Coupler Voltage Drop Vcoupler_drop 4.5 8 V IBUS1 = 24 mA, Vcoupler_drop = VBUS1 - VFILT 8
VFILT Undervoltage release level VFILTH 10.1 10.6 11.2 V VFILT rising, see Figure 5 8
VFILT Undervoltage trigger level VFILTL 8.4 8.9 9.4 V VFILT falling, see Figure 5 8
DC1 Output Voltage VDD1 3.13 3.3 3.47 V 8
DC1 Overcurrent Threshold IDD1_lim -100 -200 mA R2 = 1 ohm, see Figure 14 8
DC2 Output Voltage VDD2 3.3 21 V VIN ≥ VDD2 8
VDD2MV Input Resistance RVDD2M 60 100 140 kΩ VDD2MV-pin 8
V20V Output Voltage V20V 18 20 22 V I20V < 4 mA, VFILT ≥ 21 V 8
V20V Undervoltage release level V20VH 12.6 13.4 14.2 V V20V rising, see Figure 7 8
V20V Undervoltage trigger level V20VL 11.8 12.6 13.4 V V20V falling, see Figure 7 8
FANIN/WAKE-pin release level VWAKE_H 1.5 1.8 2.1 V See Figure 8 9
FANIN/WAKE-pin active level VWAKE_L 0.9 1.2 1.4 V See Figure 8 9
Pull-Up Resistor FANIN/WAKE-pin RWAKE 80 165 270 Ω Pull-up connected to VAUX 9
Logic Low Threshold VIL 0 0.7 V 9
Logic High Threshold VIH 2.65 V max VDDD 9
Internal Pull-Down Resistor RDOWN 5 10 28 kΩ SCK/UC2, SDI/RXD and CSB/UC1 pin excluded. Only valid in Normal State. 9
Logic low output level VOL 0 0.4 V 9
Thermal Warning TTW 105 115 135 °C Rising temperature, See Figure 9 9
Thermal shutdown TTSD 125 140 155 °C Rising temperature, See Figure 9 9
Thermal Hysteresis THyst 5 11 15 °C See Figure 9 9
Thermal Resistance Junction-to-Ambient Rthja 30 K/W Simulated Conform JEDEC JESD-51, (2S2P) 9
Thermal Resistance Junction-to-Ambient Rthja 60 K/W Simulated Conform JEDEC JESD-51, (1S0P) 9
Thermal Resistance Junction-to-Exposed Pad Rthjp 0.95 K/W 9
Bus Current Consumption IBUS1_Int 5 mA Normal operating mode, no external load, DC1 and DC2 enabled, continuous transmission of '0' by another KNX device (50% bus load), based on Figure 14 7
VDD2 Undervoltage release level VDD2H 0.9 x VDD2 VDD2 rising, see Figure 6 8
VDD2 Undervoltage trigger level VDD2L 0.8 x VDD2 VDD2 falling, see Figure 6 8

CAD (KiCad official)

  • Symbol: NCN5120MNTWG
  • Footprint: Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm
  • 3D model: QFN-40(6x6) (KiCad packages3D, STEP)
  • 3D model files: ncn5120mntwg-etched.step / ncn5120mntwg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncn5120mntwg.step / ncn5120mntwg.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (56 pp, sha256 822da73315c1b8da, retrieved 2026-10-24, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF