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NCN8025MTTBG

Public Made by Adom

by adom

onsemi Interface - Specialized, QFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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NCN8025MTTBG

onsemi · Interface - Specialized · QFN-16-EP(3x3)

NCN8025MTTBG from onsemi, in a QFN-16-EP(3x3). 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 VSEL0 input Selects card VCC mode: VSEL0 Low gives 5 V (VSEL1 High) or 3 V (VSEL1 Low); VSEL0 High gives 1.8 V (VSEL1 High) or 3 V (VSEL1 Low).
2 VDDP power_in Regulator power supply (LDO input), 2.7 V to 5.5 V depending on CVCC mode, with 10 µF + 100 nF decoupling close to the pin.
3 PRES input Card presence input, active (card present) when Low, with a built-in debounce timer of about 8 ms, for Normally Open smart card connectors.
4 CI/O bidirectional Card serial I/O (C7) connection with a bidirectional level translator to the microcontroller and a typical 11 kΩ pull-up to CVCC.
5 CCLK output Clock output to the card connector (C3), derived from CLKIN through the clock dividers and level shifter.
6 CRST output Reset output to the card (C2), level-shifted from RSTIN according to the programmed CVCC value.
7 CVCC power_out Card power supply output (C1) from the internal LDO programmable to 1.8 V, 3 V or 5 V, sourcing up to 70 mA and requiring 80 nF to 1.2 µF low-ESR (<100 mΩ) ceramic capacitance.
8 CMDVCC input Active-Low command VCC input; the activation sequence starts when CMDVCC toggles High to Low with a card present.
9 RSTIN input Reset input from the host referred to VDD, level-shifted to the card reset pin according to the programmed CVCC.
10 VDD power_in Controller-side supply, 2.7 V to 5.5 V, with a 0.1 µF decoupling capacitor; card pins are disabled when VDD falls below 2.30 V typical.
11 INT output Active-Low interrupt output that signals card presence and faults such as CVCC overload.
12 CLKIN input External clock input, up to 27 MHz.
13 I/Ouc bidirectional Microcontroller-side serial I/O with a bidirectional level translator to the card and a built-in constant 11 kΩ typical pull-up.
14 CLKDIV1 input Clock division ratio programming input, used together with CLKDIV2 (ratios 1, 1/2, 1/4, 1/8).
15 CLKDIV2 input Clock division ratio programming input, used together with CLKDIV1 (ratios 1, 1/2, 1/4, 1/8).
16 VSEL1 input Card VCC voltage select input: with VSEL0 Low, High gives 5 V and Low gives 3 V; with VSEL0 High, High gives 1.8 V and Low gives 3 V.
17 GND power_in Regulator power supply ground, connected to the exposed pad, which must be connected to the PCB.

Key specifications

Parameter Value
Manufacturer onsemi
Package QFN-16-EP(3x3)
Category Interface ICs
Pins 17

CAD (KiCad official)

  • Symbol: NCN8025MTTBG
  • Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
  • 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: ncn8025mttbg-etched.step / ncn8025mttbg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncn8025mttbg.step / ncn8025mttbg.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (15 pp, sha256 c26d5c0564f47926, retrieved 2026-10-27, 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