Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Loads on click. Unloads only if this page sits in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗

Loads on click. Unloads only if this page sits in the background.

PCB Footprint

Open full view ↗

Loads on click. Unloads only if this page sits in the background.

Datasheet

Open in new tab ↗

Loads on click. Unloads only if this page sits in the background.

Download PDF

Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

NCN8025AMNTXG

onsemi · Interface - Specialized · QFN-24-EP(4x4)

NCN8025AMNTXG from onsemi, in a QFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VSEL0	input	Selects card VCC voltage mode: Low for 5V/3V selection, High for 1.8V/3V selection via VSEL1.
2	VDDP	power_in	Regulator power supply input for card power generation.
3	PRES	input	Card presence input for normally-open connector, active low with 8 ms debounce.
4	PRES	input	Card presence input for normally-closed connector, active high with 8 ms debounce.
5	CI/O	bidirectional	Bidirectional serial I/O to card C7 with 11 kΩ pull-up to CVCC.
6	CAUX2	bidirectional	Bidirectional auxiliary I/O to card C8 with 11 kΩ pull-up to CVCC.
7	CAUX1	bidirectional	Bidirectional auxiliary I/O to card C4 with 11 kΩ pull-up to CVCC.
8	GND	power_in	Card ground connection.
9	CCLK	output	Clock output to card C3, derived from CLKIN through clock dividers.
10	CRST	output	Reset output to card C2, controlled by RSTIN through level shifter.
11	CVCC	power_out	Regulated card power supply output, programmable 1.8V/3.0V/5.0V at up to 70 mA.
12	CMDVCC	input	Activation sequence control input, active low to enable card interface.
13	PORADJ	input	VDD UVLO threshold adjustment input via external resistor divider; connect to ground when unused.
14	RSTIN	input	Reset input from microcontroller at VDD level, translated to card reset voltage.
15	VDD	power_in	Microcontroller power supply input 2.7V-5.5V, requires 0.1 μF decoupling capacitor.
16	GND	power_in	Ground connection.
17	INT	output	Interrupt output, active low when card present or CVCC overloaded.
18	CLKIN	input	External clock input, 27 MHz maximum frequency.
19	I/Ouc	bidirectional	Bidirectional serial I/O to microcontroller with 11 kΩ pull-up.
20	AUX1uc	bidirectional	Bidirectional auxiliary C4 signal adapter to microcontroller with 11 kΩ pull-up.
21	AUX2uc	bidirectional	Bidirectional auxiliary C8 signal adapter to microcontroller with 11 kΩ pull-up.
22	CLKDIV1	input	Clock frequency division ratio control with CLKDIV2 for ÷1, ÷2, ÷4, ÷8 selection.
23	CLKDIV2	input	Clock frequency division ratio control with CLKDIV1 for ÷1, ÷2, ÷4, ÷8 selection.
24	VSEL1	input	Card VCC voltage selection with VSEL0 for 1.8V/3.0V/5.0V output.
25	GND	power_in	Regulator power supply ground and exposed pad connection to PCB.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	QFN-24-EP(4x4)
Category	Interface
Pins	25

CAD (KiCad official)

Symbol: NCN8025AMNTXG
Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)
3D model files: ncn8025amntxg-etched.step / ncn8025amntxg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncn8025amntxg.step / ncn8025amntxg.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 2026-09-18, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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