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G767 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G767 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 14 page  Ver: 2.5 Dec 14, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G767 Global Mixed-mode Technology Inc. Remote/Local Temperature Sensor with SMBus Serial Interface Features Two Channels: Measures Both Remote and Local Temperatures No Calibration Required SMBus 2-Wire Serial Interface Programmable Under/Overtemperature Alarms Supports SMBus Alert Response Accuracy: ±2°C (+60°C to + 100°C, local) ±3°C (-40°C to +125°C, local) ±3°C (+60°C to +100°C, remote) 3µA (typ) Standby Supply Current 70µA (max) Supply Current in Auto- Convert Mode +3V to +5.5V Supply Range Small, 16-Pin SSOP Package Applications Desktop and Notebook Central Office Computers Telecom Equipment Smart Battery Packs Test and Measurement LAN Servers Multi-Chip Modules Industrial Controls General Description The G767 is a precise digital thermometer that reports the temperature of both a remote sensor and its own package. The remote sensor is a diode-connected transistor typically a low-cost, easily mounted 2N3904 NPN type-that replace conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channel can also measure the die tem- perature 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 temperature data. The data format is 7 bits plus sign, with each bit cor- responding to 1°C, in two’s-complement format. Measurements can be done automatically and autonomously, with the conversion rate programmed by the user or programmed to operate in a single-shot mode. The adjustable rate allows the user to control the supply-current drain. The G767 is available in a small, 16-pin SSOP sur- face-mount package. Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) TEMP. RANGE PACKAGE G767 G767f -55°C to +125°C SSOP-16 Pin Configuration Typical Operating Circuit 0.1µF 200Ω 3V TO 5.5V Vcc STBY DXP DXN SMBCLK SMBDATA ALERT 10k EACH CLOCK DATA INTERRUPT TO µC ADD0 ADD1 GND 2200pF 2N3904 SMBDATA 1 2 3 4 5 6 7 8 N.C. Vcc DXP DXN N.C. ADD1 GND GND 16 15 14 13 12 11 10 9 N.C STBY SMBCLK N.C. ALERT ADD0 N.C. SSOP-16 G767 0.1µF 200Ω 3V TO 5.5V Vcc STBY DXP DXN SMBCLK SMBDATA ALERT 10k EACH CLOCK DATA INTERRUPT TO µC ADD0 ADD1 GND 2200pF 2N3904 0.1µF 200Ω 3V TO 5.5V Vcc STBY DXP DXN SMBCLK SMBDATA ALERT 10k EACH CLOCK DATA INTERRUPT TO µC ADD0 ADD1 GND 2200pF 2N3904 SMBDATA 1 2 3 4 5 6 7 8 N.C. Vcc DXP DXN N.C. ADD1 GND GND 16 15 14 13 12 11 10 9 N.C STBY SMBCLK N.C. ALERT ADD0 N.C. SSOP-16 G767 |
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