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AT89LS52-16AU

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Microchip Tech Pre-ordered MCUs, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersat89ls52-16aufactory-2.0.0extractor-text

Verified AT89LS52-16AU

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 44 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: AT89LS52-16AU · TQFP-44(10x10) · 44 pins
  • ✓copper: 44 copper pads, none touching another net
  • ✓datasheet: all 44 pin names found in the 39-page datasheet
  • ✓distributor: lcsc C618939, digikey AT89LS52-16AU-ND, mouser 556-A89LS52-16AU
  • ✓family: TQFP-44_10x10mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-m06pp_eq/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: 44 pins = 44 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 44 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ at89ls52-16au.kicad_sym✓ at89ls52-16au.kicad_mod✓ at89ls52-16au.step
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Ray Publish 0.1.0 4f91343 4d ago

AT89LS52-16AU

Microchip Tech · Pre-ordered MCUs · TQFP-44(10x10)

AT89LS52-16AU from Microchip Tech, in a TQFP-44(10x10). 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 P1.5 bidirectional Port 1 bit 5 with internal pull-up; alternate function MOSI for In-System Programming.
2 P1.6 bidirectional Port 1 bit 6 with internal pull-up; alternate function MISO for In-System Programming.
3 P1.7 bidirectional Port 1 bit 7 with internal pull-up; alternate function SCK for In-System Programming.
4 RST input Reset input; a high for two machine cycles while the oscillator is running resets the device, and the pin drives high for 98 oscillator periods after Watchdog timeout.
5 P3.0 bidirectional Port 3 bit 0 with internal pull-up; alternate function RXD (serial input port).
6 NC unconnected No connect.
7 P3.1 bidirectional Port 3 bit 1 with internal pull-up; alternate function TXD (serial output port).
8 P3.2 bidirectional Port 3 bit 2 with internal pull-up; alternate function INT0 (external interrupt 0).
9 P3.3 bidirectional Port 3 bit 3 with internal pull-up; alternate function INT1 (external interrupt 1).
10 P3.4 bidirectional Port 3 bit 4 with internal pull-up; alternate function T0 (timer 0 external input).
11 P3.5 bidirectional Port 3 bit 5 with internal pull-up; alternate function T1 (timer 1 external input).
12 P3.6 bidirectional Port 3 bit 6 with internal pull-up; alternate function WR (external data memory write strobe).
13 P3.7 bidirectional Port 3 bit 7 with internal pull-up; alternate function RD (external data memory read strobe).
14 XTAL2 output Oscillator amplifier output (crystal connection).
15 XTAL1 input Oscillator amplifier and internal clock circuit input (crystal connection).
16 GND power_in Ground.
17 GND power_in Ground (second GND pin on the TQFP package).
18 P2.0 bidirectional Port 2 bit 0 with internal pull-up; emits address line A8 for external memory.
19 P2.1 bidirectional Port 2 bit 1 with internal pull-up; emits address line A9 for external memory.
20 P2.2 bidirectional Port 2 bit 2 with internal pull-up; emits address line A10 for external memory.
21 P2.3 bidirectional Port 2 bit 3 with internal pull-up; emits address line A11 for external memory.
22 P2.4 bidirectional Port 2 bit 4 with internal pull-up; emits address line A12 for external memory.
23 P2.5 bidirectional Port 2 bit 5 with internal pull-up; emits address line A13 for external memory.
24 P2.6 bidirectional Port 2 bit 6 with internal pull-up; emits address line A14 for external memory.
25 P2.7 bidirectional Port 2 bit 7 with internal pull-up; emits address line A15 for external memory.
26 PSEN output Program Store Enable, the read strobe to external program memory.
27 ALE/PROG output Address Latch Enable output pulse (1/6 oscillator frequency) latching the low address byte for external memory, and program pulse input (PROG) during Flash programming.
28 NC unconnected No connect.
29 EA/VPP input External Access enable / programming voltage input (VPP) for Flash programming.
30 P0.7 bidirectional Port 0 bit 7, open-drain bidirectional I/O; multiplexed address/data AD7 for external memory.
31 P0.6 bidirectional Port 0 bit 6, open-drain bidirectional I/O; multiplexed address/data AD6 for external memory.
32 P0.5 bidirectional Port 0 bit 5, open-drain bidirectional I/O; multiplexed address/data AD5 for external memory.
33 P0.4 bidirectional Port 0 bit 4, open-drain bidirectional I/O; multiplexed address/data AD4 for external memory.
34 P0.3 bidirectional Port 0 bit 3, open-drain bidirectional I/O; multiplexed address/data AD3 for external memory.
35 P0.2 bidirectional Port 0 bit 2, open-drain bidirectional I/O; multiplexed address/data AD2 for external memory.
36 P0.1 bidirectional Port 0 bit 1, open-drain bidirectional I/O; multiplexed address/data AD1 for external memory.
37 P0.0 bidirectional Port 0 bit 0, open-drain bidirectional I/O; multiplexed address/data AD0 for external memory.
38 VCC power_in Supply voltage; device operating range is 2.7 V to 4.0 V.
39 NC unconnected No connect.
40 P1.0 bidirectional Port 1 bit 0 with internal pull-up; alternate function T2 (Timer/Counter 2 external count input), clock-out.
41 P1.1 bidirectional Port 1 bit 1 with internal pull-up; alternate function T2EX (Timer/Counter 2 capture/reload trigger and direction control).
42 P1.2 bidirectional Port 1 bit 2 with internal pull-up.
43 P1.3 bidirectional Port 1 bit 3 with internal pull-up.
44 P1.4 bidirectional Port 1 bit 4 with internal pull-up.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-44(10x10)
Category Embedded Processors & Controllers
Pins 44

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 (Except EA) VIL -0.5 0.7 V 30
Input Low Voltage (EA) VIL1 -0.5 0.2 V 0.2 VCC-0.3 V as printed 30
Input High Voltage (Except XTAL1, RST) VIH 0.2 V min 0.2 VCC+0.9; max VCC+0.5 30
Input High Voltage (XTAL1, RST) VIH1 0.7 V min 0.7 VCC; max VCC+0.5 30
Output Low Voltage (Ports 1,2,3) VOL 0.45 V IOL = 0.8 mA 30
Output Low Voltage (Port 0, ALE, PSEN) VOL1 0.45 V IOL = 1.6 mA 30
Output High Voltage (Ports 1,2,3, ALE, PSEN) VOH 2.4 V IOH = -60 µA, VCC = 5V ± 10% 30
Output High Voltage (Port 0 external bus) VOH1 2.4 V IOH = -800 µA, VCC = 5V ± 10% 30
Logical 0 Input Current (Ports 1,2,3) IIL -50 µA VIN = 0.45V 30
Logical 1 to 0 Transition Current ITL -150 µA VIN = 2V, VCC = 5V ± 10% 30
Input Leakage Current (Port 0, EA) ILI -10 10 µA 0.45 < VIN < VCC 30
Reset Pulldown Resistor RRST 50 300 KΩ 30
Pin Capacitance CIO 10 pF Test Freq. = 1 MHz, TA = 25°C 30
Power Supply Current, Active Mode ICC 25 mA Active Mode, 12 MHz 30
Power Supply Current, Idle Mode ICC 6.5 mA Idle Mode, 12 MHz 30
Power Supply Current, Power-down Mode ICC 30 µA VCC = 4.0V 30
Operating Voltage Range VCC 2.7 4 V 1
Operating Temperature (Industrial) TA -40 85 °C 35
Oscillator Frequency 1/tCLCL 0 16 MHz 31
Operating Temperature (absolute max) -55 125 °C 29
Storage Temperature -65 150 °C 29
Voltage on Any Pin with Respect to Ground -1 7 V 29
Maximum Operating Voltage 6.6 V 29
DC Output Current 15 mA 29
ALE Pulse Width tLHLL 85 ns 16 MHz oscillator 31
Address Valid to ALE Low tAVLL 22 ns 16 MHz oscillator 31
Address Hold After ALE Low tLLAX 32 ns 16 MHz oscillator 31
ALE Low to Valid Instruction In tLLIV 150 ns 16 MHz oscillator 31
PSEN Pulse Width tPLPH 142 ns 16 MHz oscillator 31
PSEN Low to Valid Instruction In tPLIV 82 ns 16 MHz oscillator 31
RD Pulse Width tRLRH 275 ns 16 MHz oscillator 31
WR Pulse Width tWLWH 275 ns 16 MHz oscillator 31
RD Low to Valid Data In tRLDV 147 ns 16 MHz oscillator 31
Serial Programming Oscillator Frequency 1/tCLCL 3 16 MHz TA = -40°C to 85°C, VCC = 2.7V - 4.0V 29
SCK Low to MISO Valid tSLIV 10 16 32 ns TA = -40°C to 85°C, VCC = 2.7V - 4.0V 29
Chip Erase Instruction Cycle Time tERASE 500 ms TA = -40°C to 85°C, VCC = 2.7V - 4.0V 29

CAD (KiCad official)

  • Symbol: AT89LS52-16AU
  • Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
  • 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: at89ls52-16au-etched.step / at89ls52-16au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at89ls52-16au.step / at89ls52-16au.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (39 pp, sha256 e828a7b72fa7d152, retrieved 2026-10-31, 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