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AT89C2051-12PU

Public Made by Adom

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Microchip Tech MICROCHIP, DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersat89c2051-12pufactory-2.0.0extractor-text

Verified AT89C2051-12PU

by Ray · last 11 Nov 2026 · 2 records · files match
SymbolFootprint3D modelPins

Verification log 2 records

11 Nov 2026RayRebuilt by the parts factory: tier mfr, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AT89C2051-12PU · DIP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 19-page datasheet
  • ✓distributor: lcsc C150841, digikey AT89C2051-12PU-ND, mouser 556-A89C205112PU
  • ✓family: DIP-20_W7.62mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-x7aubw9f/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.17)
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 23 kB, viewers/symbol.html 17 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ at89c2051-12pu.kicad_sym✓ at89c2051-12pu.kicad_mod✓ at89c2051-12pu.step
10 Nov 2026RayPublished by the parts factory: tier mfr, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AT89C2051-12PU · DIP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 19-page datasheet
  • ✓distributor: lcsc C150841, digikey AT89C2051-12PU-ND, mouser 556-A89C205112PU
  • ✓family: DIP-20_W7.62mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-rqoebjue/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.17)
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 23 kB, viewers/symbol.html 16 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ at89c2051-12pu.kicad_sym✓ at89c2051-12pu.kicad_mod✓ at89c2051-12pu.step
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AT89C2051-12PU

Microchip Tech · MICROCHIP · DIP-20

AT89C2051-12PU from Microchip Tech, in a DIP-20. 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 RST/VPP input Reset input: holding RST high for two machine cycles while the oscillator runs resets the device, and RST is raised to 12 V to enable Flash programming.
2 P3.0 (RXD) bidirectional Port 3 bit with internal pull-up; alternate function RXD, the serial input port, and Port 3 output buffers can sink 20 mA.
3 P3.1 (TXD) bidirectional Port 3 bit with internal pull-up; alternate function TXD, the serial output port, and also the RDY/BSY output during programming.
4 XTAL2 output Output from the inverting oscillator amplifier; left unconnected when an external clock drives XTAL1.
5 XTAL1 input Input to the inverting oscillator amplifier and to the internal clock operating circuit.
6 P3.2 (INT0) bidirectional Port 3 bit with internal pull-up; alternate function INT0, external interrupt 0, and used as PROG during Flash programming.
7 P3.3 (INT1) bidirectional Port 3 bit with internal pull-up; alternate function INT1, external interrupt 1.
8 P3.4 (T0) bidirectional Port 3 bit with internal pull-up; alternate function T0, timer 0 external input (printed as "TO" on the pin diagram).
9 P3.5 (T1) bidirectional Port 3 bit with internal pull-up; alternate function T1, timer 1 external input.
10 GND power_in Ground.
11 P3.7 bidirectional Port 3 bit with internal pull-up; general-purpose bidirectional I/O, output buffer can sink 20 mA.
12 P1.0 (AIN0) bidirectional Port 1 bit that requires an external pull-up; serves as the positive input AIN0 of the on-chip analog comparator and can sink 20 mA.
13 P1.1 (AIN1) bidirectional Port 1 bit that requires an external pull-up; serves as the negative input AIN1 of the on-chip analog comparator and can sink 20 mA.
14 P1.2 bidirectional Port 1 bit with internal pull-up; can sink 20 mA and drive LEDs directly.
15 P1.3 bidirectional Port 1 bit with internal pull-up; can sink 20 mA and drive LEDs directly.
16 P1.4 bidirectional Port 1 bit with internal pull-up; can sink 20 mA and drive LEDs directly.
17 P1.5 bidirectional Port 1 bit with internal pull-up; can sink 20 mA and drive LEDs directly.
18 P1.6 bidirectional Port 1 bit with internal pull-up; can sink 20 mA and drive LEDs directly.
19 P1.7 bidirectional Port 1 bit with internal pull-up; can sink 20 mA and drive LEDs directly.
20 VCC power_in Supply voltage; the DC characteristics specify VCC = 2.7 V to 6.0 V.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package DIP-20
Category Embedded Processors & Controllers
Pins 20

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Input Low-voltage VIL -0.5 V 12
Output Low-voltage (Ports 1, 3) VOL 0.5 V IOL = 10 mA, VCC = 2.7V 12
Output High-voltage (Ports 1, 3) VOH 2.4 V IOH = -80 μA, VCC = 5V ± 10% 12
Logical 0 Input Current (Ports 1, 3) IIL -50 µA VIN = 0.45V 12
Logical 1 to 0 Transition Current (Ports 1, 3) ITL -750 µA VIN = 2V, VCC = 5V ± 10% 12
Input Leakage Current (Port P1.0, P1.1) ILI -10 10 µA 0 < VIN < VCC 12
Comparator Input Offset Voltage VOS 20 mV VCC = 5V 12
Comparator Input Common Mode Voltage VCM 0 V 12
Reset Pull-down Resistor RRST 50 300 kΩ 12
Pin Capacitance CIO 10 pF Test Freq. = 1 MHz, TA = 25°C 12
Power Supply Current, Active Mode ICC 15 mA Active Mode, 12 MHz, VCC = 6V 12
Power Supply Current, Active Mode ICC 5.5 mA Active Mode, 12 MHz, VCC = 3V 12
Power Supply Current, Idle Mode ICC 5 mA Idle Mode, 12 MHz, VCC = 6V, P1.0 & P1.1 = 0V or VCC 12
Power Supply Current, Idle Mode ICC 1 mA Idle Mode, 12 MHz, VCC = 3V, P1.0 & P1.1 = 0V or VCC 12
Power Supply Current, Power-down Mode ICC 100 µA VCC = 6V, P1.0 & P1.1 = 0V or VCC 12
Power Supply Current, Power-down Mode ICC 20 µA VCC = 3V, P1.0 & P1.1 = 0V or VCC 12
Oscillator Frequency 1/tCLCL 0 12 MHz VCC = 2.7V to 6.0V 13
Clock Period tCLCL 83.3 ns VCC = 2.7V to 6.0V 13
High Time tCHCX 30 ns VCC = 2.7V to 6.0V 13
Low Time tCLCX 30 ns VCC = 2.7V to 6.0V 13
Rise Time tCLCH 20 ns VCC = 2.7V to 6.0V 13
Fall Time tCHCL 20 ns VCC = 2.7V to 6.0V 13
Serial Port Clock Cycle Time tXLXL 1 µs 12 MHz Osc; VCC = 5.0V ± 20%; Load Capacitance = 80 pF 13
Output Data Setup to Clock Rising Edge tQVXH 700 ns 12 MHz Osc; VCC = 5.0V ± 20%; Load Capacitance = 80 pF 13
Output Data Hold after Clock Rising Edge tXHQX 50 ns 12 MHz Osc; VCC = 5.0V ± 20%; Load Capacitance = 80 pF 13
Input Data Hold after Clock Rising Edge tXHDX 0 ns 12 MHz Osc; VCC = 5.0V ± 20%; Load Capacitance = 80 pF 13
Clock Rising Edge to Input Data Valid tXHDV 700 ns 12 MHz Osc; VCC = 5.0V ± 20%; Load Capacitance = 80 pF 13
Operating Temperature -55 125 °C 12
Storage Temperature -65 150 °C 12
Voltage on Any Pin with Respect to Ground -1 7 V 12
Maximum Operating Voltage 6.6 V 12
DC Output Current 25 mA 12
Supply Voltage (operating range for AT89C2051-12PU) VCC 2.7 6 V TA = -40°C to 85°C, VCC = 2.7V to 6.0V (DC characteristics range) 12
Operating Temperature (Industrial) -40 85 °C Industrial operation range 16
Programming Enable Voltage VPP 11.5 12.5 V TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
Programming Enable Current IPP 250 µA TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
Data Setup to PROG Low tDVGL 1 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
Data Hold after PROG tGHDX 1 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
P3.4 (ENABLE) High to VPP tEHSH 1 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
VPP Setup to PROG Low tSHGL 10 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
VPP Hold after PROG tGHSL 10 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
PROG Width tGLGH 1 110 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
ENABLE Low to Data Valid tELQV 1 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
Data Float after ENABLE tEHQZ 0 1 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
PROG High to BUSY Low tGHBL 50 ns TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
Byte Write Cycle Time tWC 2 ms TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
RDY/BSY to Increment Clock Delay tBHIH 1 µs TA = 0°C to 70°C, VCC = 5.0 ± 10% 11
Increment Clock High tIHIL 200 ns TA = 0°C to 70°C, VCC = 5.0 ± 10% 11

CAD (KiCad official)

  • Symbol: AT89C2051-12PU
  • Footprint: Package_DIP:DIP-20_W7.62mm
  • 3D model: DIP-20 (KiCad packages3D, STEP)
  • 3D model files: at89c2051-12pu-etched.step / at89c2051-12pu-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at89c2051-12pu.step / at89c2051-12pu.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (19 pp, sha256 2ef3a172c794a432, retrieved 2026-11-11, 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