The MAX6576/MAX6577 are low-cost, low-current temperature sensors with a single-wire output. The MAX6576 converts the ambient temperature into a square wave with a period proportional to absolute temperature (°K). The MAX6577 converts the ambient temperature into a square wave with a frequency proportional to absolute temperature. The MAX6576 offers accuracy of ±3°C at +25°C, ±4.5°C at +85°C, and ±5°C at +125°C. The MAX6577 offers accuracy of ±3°C at +25°C, ±3.5°C at +85°C, and ±4.5°C at +125°C. Both devices feature a single-wire output that minimizes the number of pins necessary to interface with a microprocessor. The period/frequency range of the output square wave can be selected by hard-wiring the two time-select pins (TS0, TS1) to either VDD or GND. The MAX6576/MAX6577 are available in space-saving 6-pin SOT23 packages. Applications include critical µP and µC temperature monitoring, portable battery-powered equipment, cell phones, battery packs, hard drives/tape drives, networking and telecom equipment, medical equipment, and automotive.
The MAX6576 and MAX6577 are low‑cost, low‑current temperature sensors offered in a 6‑pin SOT‑23 package. They feature a single‑wire output that can be configured for either a period output (MAX6576) or a frequency output (MAX6577), with the output proportional to absolute temperature. The devices operate from +2.7 V to +5.5 V and draw only about 140 µA typical supply current.
Typical applications include critical micro‑processor temperature monitoring, portable battery‑powered equipment, cell phones, networking and telecom gear, and medical equipment. The datasheet provides absolute maximum ratings, electrical characteristics, pin descriptions, typical operating curves, noise considerations, and an example 8051 microcontroller interface.
| Supply Voltage Range | +2.7 V to +5.5 V |
|---|---|
| Typical Supply Current | 140 µA |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | 6‑pin SOT‑23 |
| Output Type | Period (MAX6576) or Frequency (MAX6577) |
| Accuracy at +25 °C (MAX6576) | ±0.8 °C |
| Noise Amplitude (MAX6576) | 0.38 °C |
They operate from +2.7 V to +5.5 V.
The typical supply current is about 140 µA.
Both devices are offered in a 6‑pin SOT‑23 package.