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G781 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers

Part No. G781
Description  ±1°C Remote and Local Temperature Sensor with SMBus Serial Interface
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Maker  ETC [List of Unclassifed Manufacturers]
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G781 Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers

 
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Ver: 1.0
Oct 02, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
G781
Electrical Characteristics (continued)
(VCC = + 3.3V, TA = 0 to +85°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SMBus Interface
Logic Input High Voltage
STBY
, SMBCLK, SMBDATA; Vcc = 3V to 5.5V
2.4
V
Logic Input Low Voltage
STBY
, SMBCLK, SMBDATA; Vcc = 3V to 5.5V
0.8
V
Logic Output Low Sink Current
ALERT , SMBDATA forced to 0.4V
6
mA
ALERT Output High Leakage Current
ALERT forced to 5.5V
1
µA
Logic Input Current
Logic inputs forced to VCC or GND
-2
2
µA
SMBus Input Capacitance
SMBCLK, SMBDATA
5
pF
SMBus Clock Frequency
100
kHz
SMBus Timeout
SMBCLK low time for interface reset
30
ms
SMBCLK Clock Low Time
tLOW , 10% to 10% points
4.7
µs
SMBCLK Clock High Time
tHIGH , 90% to 90% points
4
µs
SMBus Start-Condition Setup Time
4.7
µs
SMBus Repeated Start-Condition Setup Time tSU : STA , 90% to 90% points
500
ns
SMBus Start-Condition Hold Time
tHD: STA , 10% of SMBDATA to 90% of SMBCLK
4
µs
SMBus Stop-Condition Setup Time
tSD: STO , 90% of SMBCLK to 10% of SMBDATA
4
µs
SMBus Data Valid to SMBCLK Rising-Edge
Time
tSU: DAT , 10% or 90% of SMBDATA to 10% of
SMBCLK
800
ns
SMBus Data-Hold Time
tHD : DAT
300
ns
SMBCLK Falling Edge to SMBus Data-Valid
Time
Master clocking in data
1
µs
Note 1: A remote diode is any diode-connected transistor from Table1. TR is the junction temperature of the remote
of the remote diode. See Remote Diode Selection for remote diode forward voltage requirements.
Note 2: Guaranteed by design but not 100% tested.
Pin Description
PIN
NAME
FUNCTION
1
VCC
Supply Voltage Input, 3V to 5.5V. Bypass to GND with a 0.1µF capacitor.
2
DXP
Combined Current Source and A/D Positive Input for remote-diode channel. Do not leave DXP float-
ing; tie DXP to DXN if no remote diode is used. Place a 2200pF capacitor between DXP and DXN for
noise filtering.
3
DXN
Combined Current Sink and A/D Negative Input.
4
THERM Open-drain output. Requires pull-up to VCC.
5
GND
Ground
6
ALERT
SMBus Alert (interrupt) Output, open drain
7
SMBDATA SMBus Serial-Data Input / Output, open drain
8
SMBCLK SMBus Serial-Clock Input


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