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G768D, G770, G770B

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MFG:GMT  Package Cooled:SSOP  D/C:

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G768D, G770, G770B Datasheet download

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Part Number: G768D

 

MFG: GMT

Package Cooled: SSOP

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  • G760A

  • Pack: SOP D/C: 00+& Qty: 23 Note: stock,TEL:86-0755-61329226,MSN:havinzhou@hotmail.com  Adddate: 2024-07-27
  • Inquire Now
  • Enoki Electronics Technology   China
    Contact: Mr.HavinZhou   MSN:havinzhou@hotmail.com
    Tel: 86-0755-82529412
    Fax: 86-0755-82529412
    (1)
  • G767

  • Vendor: GMT Pack: SSOP Qty: 1140 Note: original,in stock"  Adddate: 2024-07-27
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  • AMASS ELETRONICS LIMITED   China
    Contact: Ms.tinahou   MSN:tinaaec@hotmail.com
    Tel: 86-755-82265120
    Fax: 86-755-82265220
    (0)
  • G767

  • Vendor: GMT Pack: SSOP Qty: 2500  Adddate: 2024-07-27
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  • TOPSUN(HK)ELECTRONIC CO.   China
    Contact: Ms.amylin   MSN:topsunic@hotmail.com
    Tel: 0086-755-82811598
    Fax: --
    (6)

About G760A

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Datasheet: G760A

File Size: 177500 KB

Manufacturer: ETC [ETC]

Download : Click here to Download

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  • G766

    File Size: 254240 KB

  • G768

    File Size: 379773 KB

  • G768B

    File Size: 379773 KB

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About G771

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Datasheet: G771

File Size: 274541 KB

Manufacturer: GMT [Global Mixed-mode Technology Inc]

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About G771

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Datasheet: G771

File Size: 274541 KB

Manufacturer: GMT [Global Mixed-mode Technology Inc]

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G768D General Description

The G768D contains a precise digital thermometer, a fan controller, and a system-reset circuit. Except for one less fan controller, G768D is backward compatible with G768B. G768D has 2 more functions, fan-failure detection and 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 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 temperature data. The data format is 7 bits plus sign, with each bit corresponding to 1, 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.

G768D also contains a fan speed controller. It connects directly to the fans and performs closed-loop control of the fan speed independently. The only external component required is a 10µF capacitor per channel. It determines the current fan speed based on the fan rotation pulses and an externally supplied 32.768KHz clock.

G768D Maximum Ratings

VCC to GND...............................-0.3V to +6V
DXP1, DXP2 to GND.....................0.3V to (VCC + 0.3V)
DXN to GND...............................-0.3V to +0.8V
CLK, FG, SMBCLK, SMBDATA , ALERT t o
GND........................................-0.3V to +6V
SMBDATA, ALERT Current.......................-1mA to +50mA
DXN Current...................................±1mA
ESD Protection (SMBCLK, SMBDATA, ALERT , human
body model).........................................2000V
ESD Protection (other pins, human body model)........2000V
Continuous Power Dissipation (TA= +70 SSOP
(de-rate 8.30mW/above +70).......................667mW
Operating Temperature Range.....................-55 to +125
Junct ion Temperature.....................................+150
Storage temperature Range....................-65 to +165
Lead Temperature (soldering, 10sec)....................+300

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

G768D 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 (-40to + 125, remote)
                     ±3 (+60 to + 100, remote)
`   +4.5V to +5.5V Supply Range
`   Fan speed control range: 3,000 to 30,000 rpm
`   Fan speed accuracy: ±2%
`   Built-in MOSFET switch
`   Internal current-limit and over-temperature protection for fan control
`  Watchdog for fan control
`   Alarm for fan failure
`   Precision Monitoring of 5V Power-Supply Voltage
`   340ms Typical 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

G768D Connection Diagram

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