Especificaciones
MAX6686AU75L+ is a dual remote junction temperature switch from Analog Devices (Maxim Integrated), suffix AU75L defines fixed low threshold range of 75°C~115°C, factory preset upper alarm limit 120°C, 8-pin µMAX small surface-mount tube packaging. It uses external diode-connected transistor to remotely monitor chip die temperature, with two independent open-drain low-active alarm outputs for fan control and overheat protection circuitsAnalog Devices.
👉 Distinction vs MAX6685: MAX6685 TLOW is push-pull high-active output; MAX6686 both THIGH and TLOW are open-drain low-active, easier for multi-device wired-OR fault signal aggregation. This 75L version targets high-temperature operating boards without low-temperature monitoring demand, different from 40L variant (40°C~80°C low threshold range)Analog Devices.
Características principales
- Dual Independent Temperature Alarm Logic
- Upper threshold (THIGH): Factory fixed +120°C open-drain low-level alarm, triggers overheat shutdown protection
- Lower threshold (TLOW): Pin-strap programmable range 75°C ~ 115°C, adjustable per 5°C step via S1/S2 hardware pins
- Built-in fixed 5°C hysteresis to eliminate output chattering near trip points
- Both outputs open-drain structure, max sink current 20mA, support pull-up to 3.3V/5V system rail
- Remote Diode Temperature Sensing
- Sensing element: On-chip substrate PNP diode inside CPU/FPGA/ASIC or discrete small-signal transistor
- Temperature measurement accuracy: ±1.5°C across full operating range
- Differential DXP/DXN sensing pins suppress PCB noise interference from long routing traces
- Wide detectable remote temperature: -75°C ~ +125°C
- Electrical Operating Specs
- Supply voltage VDD: 3.0 V ~ 5.5 V, compatible with industrial single lithium and standard digital power rails
- Typical quiescent supply current: 200 µA; peak conversion current 400 µA
- No dedicated shutdown pin, low static power loss under continuous monitoring state
- Sensing input max leakage current 10 µA, no bias resistor required externally
- Package & Reliability Specifications
- Package: 8-pin µMAX (mini TSSOP, 3.0mm width slim outline SMD)
- Operating ambient temperature: -40°C ~ +125°C industrial grade
- MSL 1 moisture sensitivity level, unlimited floor life without dry bag storage
- Suffix + = lead-free RoHS compliant; base part AU75L is tube packing, tape reel variant MAX6686AU75L+T available for mass production
Aplicaciones típicas
FPGA, high-speed CPU, power ASIC die overheat protection
Server, industrial computer intelligent fan speed trigger control
Multi-chip power module (PMIC/MOSFET array) thermal monitoring
Industrial high-frequency switching power supply over-temperature lockout
Telecommunication baseboard, network switch chip thermal alarm
Medical imaging equipment FPGA thermal protection circuits
New energy converter control board high-temperature early warning
Test & measurement instrument core chip temperature monitoring
Automotive infotainment processor remote junction temperature detection
LXB Semicon supplies original Analog Devices MAX6686AU75L+ dual open-drain remote diode temperature switch IC
