MIC809-5SYC3-TR

MIC809-5SYC3-TR is Microchip’s MIC809 family microprocessor supervisory device with an integrated watchdog timer. It provides a clean reset to a microcontroller when the supply voltage falls below its threshold or when the watchdog expires, protecting against brownouts and software lockups. Timing is set by an external capacitor, and the device typically offers a low-quiescent current, single-supply operation (this variant is the 5V version). The -TR suffix indicates Tape-and-Reel packaging for mass production. Common uses include power-on reset (POR) and watchdog/reset supervision in embedded systems to ensure reliable MCU startup and fault recovery. For exact voltage thresholds, timing ranges, pinout, and package options, consult the MIC809 datasheet. If you want, I can summarize the key electrical specs from the datasheet.

Equivalents (voltage supervisor/reset ICs) for MIC809-5SYC3-TR:
- MAX809 / MAX810 / MAX811 family (Maxim, now Analog Devices)
- TI TLV803 / TLV803B
- ON Semiconductor NCP803 (and NCP803A variants)
- Microchip MCP131 / MCP132 (and MCP134)
These provide similar 5.0 V threshold, POR/reset outputs and 8-pin packages. Check exact timing, output type (push-pull/open-drain) and supply range to match MIC809-5SYC3-TR.

MIC809-5SYC3-TR is a fixed-threshold, low-power voltage supervisor (reset generator) from Microchip. Key features:
- Fixed reset threshold options in the MIC809 family; no external resistors needed for level sensing
- Operating supply range: broad (typical 1.8V–5.5V, suitable for low- to mid-voltage systems)
- Push-pull, TTL/CMOS-compatible RESET output (active low)
- Power-on reset with internal delay to guarantee proper MCU startup
- Very low quiescent current for battery-powered designs
- No external components required (ready-to-use reset supervision)
- Small 5-pin package in SOT-23/SYC3 style; -TR indicates Tape & Reel packaging
- Industrial temperature range (typical -40°C to 125°C)
- ESD protection on I/O; RoHS compliant
Typical applications: microcontroller/processor reset supervision, safe power-up/power-down handling, and system monitoring where a reliable reset is required without external circuitry. For exact threshold values and pinout, consult the MIC809 datasheet.

Pin count: 5 pins (SOT-23-5 package).
Function: Microprocessor reset/voltage supervisor timer. It monitors Vcc and provides a reset signal to a microcontroller, with a programmable timeout set by an external RC network (delay/ watchdog style reset on power-up and voltage faults).

- Manufacturer: Microchip Technology Inc. (MIC809 originated from Micrel; Microchip acquired Micrel in 2015).
- What kind of company: A global semiconductor company that designs and manufactures analog, mixed-signal, memory, and microcontroller integrated circuits (an IDM/large IC supplier).

MIC809-5SYC3-TR is a low‑power voltage supervisor/reset timer. It provides a reset signal on power‑up/power‑down and when the monitored supply crosses thresholds. Common applications include:
- Microcontroller/processor reset generation and monitoring
- Power‑on/reset and brown‑out protection for digital ICs
- Hardware watchdog/time‑out signaling in embedded systems
- System reset control during power cycling for memories/peripherals
- Battery‑powered/portable equipment requiring low quiescent current and deterministic resets
- Automotive/industrial control circuits needing reliable reset timing and fault protection

SC-70-5 (5-pin SOT-23 style) package; Tape‑and‑Reel (TR) packaging.