G771

Global Mixed-mode Technology Inc. G771 Two Remote Temperature Sensors with SMBus Serial Interface and System Reset Circuit Features Measures Two Remote Temperatures „ No Calibration Required „ SMBus 2-Wire Serial Interface „ Programmable Under/Over-temperature Alarms „ Programmable Thermal Shutdown Signal „ Supports SMBus Alert Response „ Accuracy: ±5°C (-40°C to + 125°C, remote) „ ±3°C (+60°C to + 100°C, remote) 4.5V to 5.5V Supply Range „ Precision Monitoring of 5V Power-Supply „ Voltage 140ms Min Power-On Reset Pulse Width „ RESET Output Guaranteed RESET Valid to VCC=1V „ Power Supply Transient Immunity „ No External Components needed for reset „ function Small, 16-Pin SSOP Package „ General Description The G771 contains a precise digital thermometer, a system-reset circuit, and a programmable thermal shutdown signal. The thermometer reports the temperature of 2 remote sensors. The remote sensors are diode-connected transistors typically a low-cost, easily mounted 2N3904 NPN type that replace conventional thermistors or thermocouples. Remote accuracy is ±5°C for multiple transistor manufacturers, with no calibration needed. The remote channel can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor. The 2-wire serial interface accepts standard System Management Bus (SMBusTM) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperatu...