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MIC1557YM5-TR
Public Made by Adomby adom
Microchip Tech Timers / Counters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMIC1557YM5-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mic1557ym5-tr.step/mic1557ym5-tr.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).