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ATMEGA48P-20AU

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Microchip Tech Pre-ordered MCUs, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatmega48p-20aufactory-2.0.0extractor-text

Changed since verified ATMEGA48P-20AU

by Ray · last 30 Oct 2026 · 1 record · files changed since
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Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 32 pinschanged since
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATMEGA48P-20AU · TQFP-32(7x7) · 32 pins
  • ✓copper: 32 copper pads, none touching another net
  • ✓datasheet: all 32 pin names found in the 436-page datasheet
  • ✓distributor: lcsc C1339303, digikey ATMEGA48P-20AU-ND, mouser 556-ATMEGA48P-20AU
  • ✓family: TQFP-32_7x7mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-qs4rz7ut/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 32 pins = 32 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 32 pins agree
  • ✓visibility: public, source open
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ATMEGA48P-20AU

Microchip Tech · Pre-ordered MCUs · TQFP-32(7x7)

ATMEGA48P-20AU from Microchip Tech, in a TQFP-32(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 PD3 bidirectional Port D bit 3 is a bi-directional I/O pin with internal pull-up that can serve as external interrupt INT1, OC2B output, or PCINT19 source, and must be configured as an output for OC2B.
2 PD4 bidirectional Port D bit 4 is a bi-directional I/O pin with internal pull-up that can serve as USART external clock XCK, Timer/Counter0 external counter input T0, or PCINT20 source.
3 GND power_in Ground.
4 VCC power_in Digital supply voltage; ATmega48P/88P/168P operates at 2.7 - 5.5V (ATmega48PV variant 1.8 - 5.5V).
5 GND power_in Ground.
6 VCC power_in Digital supply voltage; ATmega48P/88P/168P operates at 2.7 - 5.5V (ATmega48PV variant 1.8 - 5.5V).
7 PB6 bidirectional Port B bit 6 is the input to the inverting oscillator amplifier (XTAL1) or Timer Oscillator pin 1 depending on clock fuse settings; when used as a clock pin it cannot be used as I/O.
8 PB7 bidirectional Port B bit 7 is the output of the inverting oscillator amplifier (XTAL2) or Timer Oscillator pin 2 depending on clock fuse settings; when used as a clock pin it cannot be used as I/O.
9 PD5 bidirectional Port D bit 5 is a bi-directional I/O pin with internal pull-up that can serve as Timer/Counter1 external counter input T1, OC0B output, or PCINT21 source.
10 PD6 bidirectional Port D bit 6 is a bi-directional I/O pin that serves as Analog Comparator positive input AIN0 (pull-up should be switched off), OC0A output, or PCINT22 source.
11 PD7 bidirectional Port D bit 7 is a bi-directional I/O pin that serves as Analog Comparator negative input AIN1 (pull-up should be switched off) or PCINT23 source.
12 PB0 bidirectional Port B bit 0 is a bi-directional I/O pin that serves as Timer/Counter1 input capture ICP1, divided system clock output CLKO, or PCINT0 source.
13 PB1 (OC1A/PCINT1) bidirectional Port B bit 1 is a bi-directional I/O pin that serves as Timer/Counter1 output compare match A output OC1A (must be configured as output) or PCINT1 source.
14 PB2 (SS/OC1B/PCINT2) bidirectional Port B bit 2 is a bi-directional I/O pin that serves as SPI slave select SS, Timer/Counter1 output compare match B output OC1B (must be configured as output), or PCINT2 source.
15 PB3 (MOSI/OC2A/PCINT3) bidirectional Port B bit 3 is a bi-directional I/O pin that serves as SPI MOSI, Timer/Counter2 output compare match A output OC2A (must be configured as output), or PCINT3 source.
16 PB4 (MISO/PCINT4) bidirectional Port B bit 4 is a bi-directional I/O pin that serves as SPI MISO data pin or PCINT4 source.
17 PB5 (SCK/PCINT5) bidirectional Port B bit 5 is a bi-directional I/O pin that serves as SPI clock SCK (input when SPI is slave) or PCINT5 source.
18 AVCC power_in Supply voltage pin for the A/D converter, PC3:0 and ADC7:6; it should be externally connected to VCC even if the ADC is not used, and through a low-pass filter if the ADC is used.
19 ADC6 input ADC input channel 6 (TQFP and QFN/MLF package only), powered from the analog supply, serving as a 10-bit ADC channel.
20 AREF input Analog reference pin for the A/D converter.
21 GND power_in Ground.
22 ADC7 input ADC input channel 7 (TQFP and QFN/MLF package only), powered from the analog supply, serving as a 10-bit ADC channel.
23 PC0 (ADC0/PCINT8) bidirectional Port C bit 0 is a bi-directional I/O pin with internal pull-up that can serve as ADC input channel 0 (analog power) or PCINT8 source.
24 PC1 (ADC1/PCINT9) bidirectional Port C bit 1 is a bi-directional I/O pin with internal pull-up that can serve as ADC input channel 1 (analog power) or PCINT9 source.
25 PC2 (ADC2/PCINT10) bidirectional Port C bit 2 is a bi-directional I/O pin with internal pull-up that can serve as ADC input channel 2 (analog power) or PCINT10 source.
26 PC3 (ADC3/PCINT11) bidirectional Port C bit 3 is a bi-directional I/O pin with internal pull-up that can serve as ADC input channel 3 (analog power) or PCINT11 source.
27 PC4 (ADC4/SDA/PCINT12) bidirectional Port C bit 4 is a bi-directional I/O pin with internal pull-up that serves as 2-wire serial data SDA when TWEN is set, ADC input channel 4 (digital power), or PCINT12 source.
28 PC5 (ADC5/SCL/PCINT13) bidirectional Port C bit 5 is a bi-directional I/O pin with internal pull-up that serves as 2-wire serial clock SCL when TWEN is set, ADC input channel 5 (digital power), or PCINT13 source.
29 PC6 (RESET/PCINT14) input If RSTDISBL fuse is unprogrammed this pin is the Reset input and a low level longer than the minimum pulse length (Table 29-3) generates a reset; shorter pulses are not ensured to reset; if programmed it is I/O with electrical characteristics differing from other Port C pins.
30 PD0 (RXD/PCINT16) bidirectional Port D bit 0 is a bi-directional I/O pin with internal pull-up that serves as USART receive data input RXD (input when USART receiver enabled) or PCINT16 source.
31 PD1 (TXD/PCINT17) bidirectional Port D bit 1 is a bi-directional I/O pin that serves as USART transmit data output TXD (output when USART transmitter enabled) or PCINT17 source.
32 PD2 (INT0/PCINT18) bidirectional Port D bit 2 is a bi-directional I/O pin with internal pull-up that serves as external interrupt source INT0 or PCINT18 source.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-32(7x7)
Category Embedded Processors & Controllers
Pins 32

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Storage temperature -65 150 °C 324
Operating temperature -55 125 °C 324
Voltage on any pin except RESET with respect to Ground -0.5 V 324
Voltage on RESET with respect to Ground -0.5 13 V 324
Maximum Operating Voltage 6 V 324
DC Current per I/O Pin 40 mA 324
DC Current VCC and GND Pins 200 mA 324
Supply voltage (speed grade of ATmega48P-20AU) VCC 2.7 5.5 V Ordering code ATmega48P-20AU, 20 MHz grade 418
Speed (maximum frequency) 20 MHz Speed grade 20 for ATmega48P-20AU; see Figure 29-1 418
Operating temperature range (Industrial) TA -40 85 °C Industrial operational range 418
Input Low Voltage, except XTAL1 and RESET pin VIL -0.5 V VCC = 2.4V - 5.5V 324
Input Low Voltage, XTAL1 pin VIL1 -0.5 V VCC = 1.8V - 5.5V 324
Input Low Voltage, RESET pin VIL2 -0.5 V VCC = 1.8V - 5.5V 324
Input Low Voltage, RESET pin as I/O VIL3 -0.5 V VCC = 2.4V - 5.5V 324
Output Low Voltage (except RESET pin) VOL 0.9 V IOL = 20 mA, VCC = 5V 324
Output Low Voltage (except RESET pin) VOL 0.6 V IOL = 10 mA, VCC = 3V 324
Output High Voltage (except Reset pin) VOH 4.2 V IOH = -20 mA, VCC = 5V 324
Output High Voltage (except Reset pin) VOH 2.3 V IOH = -10 mA, VCC = 3V 324
Input Leakage Current I/O Pin (low) IIL 1 µA VCC = 5.5V, pin low (absolute value) 324
Input Leakage Current I/O Pin (high) IIH 1 µA VCC = 5.5V, pin high (absolute value) 324
Power Supply Current, Active ICC 1.9 2.5 mA Active 4 MHz, VCC = 3V 325
Power Supply Current, Active ICC 6.8 9 mA Active 8 MHz, VCC = 5V 325
Power Supply Current, Idle ICC 0.4 0.7 mA Idle 4 MHz, VCC = 3V 325
Power Supply Current, Idle ICC 1.6 2.7 mA Idle 8 MHz, VCC = 5V 325
Power Supply Current, Power-save mode ICC 0.85 2.6 µA 32 kHz TOSC enabled, VCC = 3V 325
Power Supply Current, Power-down mode ICC 4.2 8 µA WDT enabled, VCC = 3V 325
Power Supply Current, Power-down mode ICC 0.18 2 µA WDT disabled, VCC = 3V 325
Reset Pull-up Resistor RRST 30 60 kΩ 325
I/O Pin Pull-up Resistor RPU 20 50 kΩ 325
Analog Comparator Input Offset Voltage VACIO 40 mV VCC = 5V, Vin = VCC/2 325
Analog Comparator Input Leakage Current IACLK -50 50 nA VCC = 5V, Vin = VCC/2 325
Analog Comparator Propagation Delay tACID 750 ns VCC = 2.7V 325
Analog Comparator Propagation Delay tACID 500 ns VCC = 4.0V 325
Calibrated Internal RC Oscillator accuracy (factory calibration) -10 10 % 8.0 MHz, VCC = 3V, 25C 329
Calibrated Internal RC Oscillator accuracy (user calibration) -1 1 % User calibration, VCC = 2.7V - 5.5V, -40C - 85C 329
Calibrated Internal RC Oscillator frequency (user calibration) 7.3 8.1 MHz User calibration, VCC = 2.7V - 5.5V, -40C - 85C 329
Oscillator Frequency (external clock) 1/tCLCL 0 10 MHz VCC = 2.7-5.5V 329
Clock Period (external clock) tCLCL 100 ns VCC = 2.7-5.5V 329
High Time (external clock) tCHCX 40 ns VCC = 2.7-5.5V 329
Low Time (external clock) tCLCX 40 ns VCC = 2.7-5.5V 329
Oscillator Frequency (external clock) 1/tCLCL 0 20 MHz VCC = 4.5-5.5V 329
Clock Period (external clock) tCLCL 50 ns VCC = 4.5-5.5V 329
High Time (external clock) tCHCX 20 ns VCC = 4.5-5.5V 329
Low Time (external clock) tCLCX 20 ns VCC = 4.5-5.5V 329
Power-on Reset Threshold Voltage (rising) VPOT 1.1 1.4 1.6 V 330
Power-on Reset Threshold Voltage (falling) VPOT 0.6 1.3 1.6 V 330
Power-on Slope Rate SRON 0.01 10 V/ms 330
Minimum pulse width on RESET Pin tRST 2.5 µs 330
Min Pulse Width on Brown-out Reset tBOD 2 µs 330
Bandgap reference voltage VBG 1 1.1 1.2 V VCC = 2.7, TA = 25°C 330
Brown-out Detector trigger level (BODLEVEL 110) VBOT 1.7 1.8 2 V BODLEVEL 2:0 = 110 330
Brown-out Detector trigger level (BODLEVEL 101) VBOT 2.5 2.7 2.9 V BODLEVEL 2:0 = 101 330
Brown-out Detector trigger level (BODLEVEL 100) VBOT 4.1 4.3 4.5 V BODLEVEL 2:0 = 100 330
Setup time (master) 10 ns Master 331
Hold time (master) 10 ns Master 331
SCK to out (master) 10 ns Master 331
Setup time (slave) 10 ns Slave 331
SCK to out (slave) 15 ns Slave 331
SCL Clock Frequency fSCL 0 400 kHz fCK > max(16fSCL, 250kHz) 333
Output Low-voltage (2-wire) VOL 0.4 V 3 mA sink current 333

CAD (KiCad official)

  • Symbol: ATMEGA48P-20AU
  • Footprint: Package_QFP:TQFP-32_7x7mm_P0.8mm
  • 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
  • 3D model files: atmega48p-20au-etched.step / atmega48p-20au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega48p-20au.step / atmega48p-20au.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (436 pp, sha256 aab081a362918ab9, retrieved 2026-10-30, tier: manufacturer)
  • 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