component

ATMEGA406-1AAU

Public Made by Adom

by adom

Microchip Tech Pre-ordered MCUs, LQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatmega406-1aaufactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
atmega406-1aau / README.md
History Download
Ray Publish 0.1.0 e1b3d6c 9d ago

ATMEGA406-1AAU

Microchip Tech · Pre-ordered MCUs · LQFP-48(7x7)

ATMEGA406-1AAU from Microchip Tech, in a LQFP-48(7x7). 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 SGND power_in Signal ground pin used as the reference for Voltage-ADC conversions.
2 PA0 bidirectional Port A bit 0 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as analog input ADC0 and PCINT0.
3 PA1 bidirectional Port A bit 1 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as analog input ADC1 and PCINT1.
4 PA2 bidirectional Port A bit 2 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as analog input ADC2 and PCINT2.
5 PA3 bidirectional Port A bit 3 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as analog input ADC3 and PCINT3.
6 VREG power_out Output from the internal Voltage Regulator, used for external decoupling to ensure stable regulator operation.
7 VCC power_in Digital supply voltage, normally connected to VREG.
8 GND power_in Ground pin.
9 PA4 bidirectional Port A bit 4 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as ADC4, INT0 and PCINT4.
10 PA5 bidirectional Port A bit 5 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as INT1 and PCINT5.
11 PA6 bidirectional Port A bit 6 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as INT2 and PCINT6.
12 PA7 bidirectional Port A bit 7 is a low-voltage bi-directional I/O with selectable internal pull-up and also serves as INT3 and PCINT7.
13 RESET input Reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running.
14 XTAL1 input Clock/oscillator pin shown in the pinout figure; its electrical behaviour is not described in the provided pages.
15 XTAL2 output Clock/oscillator pin shown in the pinout figure; its electrical behaviour is not described in the provided pages.
16 GND power_in Ground pin.
17 PB0 bidirectional Port B bit 0 is a low-voltage bi-directional I/O with internal pull-up and also serves as TDO and PCINT8.
18 PB1 bidirectional Port B bit 1 is a low-voltage bi-directional I/O with internal pull-up and also serves as TDI and PCINT9.
19 PB2 bidirectional Port B bit 2 is a low-voltage bi-directional I/O with internal pull-up and also serves as TMS and PCINT10.
20 PB3 bidirectional Port B bit 3 is a low-voltage bi-directional I/O with internal pull-up and also serves as TCK and PCINT11.
21 PB4 bidirectional Port B bit 4 is a low-voltage bi-directional I/O with internal pull-up and also serves as PCINT12.
22 PB5 bidirectional Port B bit 5 is a low-voltage bi-directional I/O with internal pull-up and also serves as PCINT13.
23 SCL bidirectional SMBUS clock, open drain bidirectional pin.
24 SDA bidirectional SMBUS data, open drain bidirectional pin.
25 PB6 bidirectional Port B bit 6 is a low-voltage bi-directional I/O with internal pull-up and also serves as OC0A and PCINT14.
26 PB7 bidirectional Port B bit 7 is a low-voltage bi-directional I/O with internal pull-up and also serves as OC0B and PCINT15.
27 PD0 bidirectional Port D bit 0 is a low-voltage bi-directional I/O with internal pull-up and also serves as the T0 timer input.
28 PD1 bidirectional Port D bit 1 is a low-voltage bi-directional I/O with internal pull-up resistors selectable per bit.
29 GND power_in Ground pin.
30 PC0 output Port C is a high voltage Open Drain output port.
31 BATT input Input for detecting when a charger is connected; this pin also defines the pull-up level for the OC and OPC outputs.
32 OPC output High voltage output to drive an external pre-charge FET.
33 OC output High voltage output to drive an external charge FET.
34 VFET power_in High voltage supply pin for the internal voltage regulator, also monitored by the battery protection for deep under-voltage protection.
35 OD output High voltage output to drive an external discharge FET.
36 PVT power_in Defines the pull-up level for the OD output.
37 GND power_in Ground pin.
38 PV4 input Input for battery cell 4, used by the Voltage ADC to measure the cell voltage.
39 PV3 input Input for battery cell 3, used by the Voltage ADC to measure the cell voltage.
40 PV2 input Input for battery cell 2, used by the Voltage ADC to measure the cell voltage.
41 PV1 input Input for battery cell 1, used by the Voltage ADC to measure the cell voltage.
42 NV input Battery cell input listed with PV1 to PV4 for the Voltage ADC cell voltage measurement.
43 VREF power_in Internal voltage reference pin for external decoupling.
44 VREFGND power_in Ground for decoupling of the internal voltage reference.
45 PPI input Unfiltered positive input from the external current sense resistor, used for over-current and short-circuit detection.
46 PI input Filtered positive input from the external current sense resistor, used by the Coulomb Counter ADC to measure charge and discharge current.
47 NI input Filtered negative input from the external current sense resistor, used by the Coulomb Counter ADC to measure charge and discharge current.
48 NNI input Unfiltered negative input from the external current sense resistor, used for over-current and short-circuit detection.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package LQFP-48(7x7)
Category Embedded Processors & Controllers
Pins 48

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Operating Voltage 4 25 V 1
Temperature Range -30 85 °C Industrial operation range 1
Maximum Withstand Voltage (High-voltage pins) 28 V High-voltage pins 1

CAD (KiCad official)

  • Symbol: ATMEGA406-1AAU
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: atmega406-1aau-etched.step / atmega406-1aau-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega406-1aau.step / atmega406-1aau.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (30 pp, sha256 61ad461a45fda1c6, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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