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MIC1557YM5-TR

Public Made by Adom

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Microchip Tech Timers / Counters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MIC1557YM5-TR

Microchip Tech · Timers / Counters · SOT-23-5

MIC1557YM5-TR from Microchip Tech, in a SOT-23-5. 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 T/T input Trigger/Threshold input, internally connected to both the threshold and trigger functions; it sets the output high when the voltage is at or below 2/3 VS and sets the output low when it is at or above 2/3 VS.
2 GND power_in Ground, the supply return.
3 CS input Chip Select/Reset input, active-high above 2/3 VS; the output is off when CS is low below 1/3 VS, and CS may be connected directly to VS if chip select is not wanted.
4 VS power_in Supply input, rated +2.7 V to +18 V.
5 OUT output CMOS totem-pole output.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOT-23-5
Category Clock/Timing
Pins 5

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Current (MIC1557, VS = 5V) IS 255 315 µA MIC1557, VS = 5V 5
Supply Current (MIC1557, VS = 15V) IS 370 420 µA MIC1557, VS = 15V 5
Astable Timing Accuracy 1717 2323 µs RA = RB = 10 kΩ, C = 0.1 μF, VS = 5V 5
Maximum Astable Frequency 5 MHz RT = 1 kΩ, CT = 47 pF, VS = 8V 5
Threshold Voltage 61 67 72 %/VS VS = 15V 5
Trigger Voltage 27 32 37 %/VS VS = 15V 5
Trigger Current 50 nA VS = 15V 5
Threshold Current 50 nA VS = 15V 5
Chip Select (on) 50 67 72 %/VS On > two-thirds of VS 5
Chip Select (off) 28 33 50 %/VS Off < one-third of VS 5
Output Voltage Drop (low, sink) 0.3 1.25 V VS = 15V, ISINK = 20 mA 5
Output Voltage Drop (low, sink) 0.08 0.5 V VS = 5V, ISINK = 20 mA 5
Output Voltage Drop (high, source) 14.1 14.7 V VS = 15V, ISOURCE = 20 mA 5
Output Voltage Drop (high, source) 3.8 4.7 V VS = 5V, ISOURCE = 20 mA 5
Supply Voltage 2.7 18 V Functional Operation (Note 2) 5
Supply Voltage (absolute maximum) VS 22 V 4
Threshold Voltage (absolute maximum) VTHR, VT/T 22 V 4
Trigger Voltage (absolute maximum) VTGR, VT/T 22 V 4
ESD HBM Rating 2 kV Note 1 4
ESD MM Rating 200 V Note 1 4
Ambient Storage Temperature TS -65 150 °C 6
Lead Temperature 300 °C Soldering, 10 sec. 6
Ambient Temperature TA -40 85 °C 6
Thermal Resistance, SOT-23-5 / TSOT-23-5 (junction to air) θJA 250 °C/W 6

CAD (KiCad official)

  • Symbol: MIC1557YM5-TR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: mic1557ym5-tr-etched.step / mic1557ym5-tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mic1557ym5-tr.step / mic1557ym5-tr.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (24 pp, sha256 d941678b172561f7, retrieved 2026-10-19, 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