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G751-1P1 Datasheet(PDF) 3 Page - Global Mixed-mode Technology Inc

Part No. G751-1P1
Description  Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface
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Manufacturer  GMT [Global Mixed-mode Technology Inc]
Direct Link  http://www.gmt.com.tw
Logo GMT - Global Mixed-mode Technology Inc

G751-1P1 Datasheet(HTML) 3 Page - Global Mixed-mode Technology Inc

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Ver: 2.4
Nov 26, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G751
Global Mixed-mode Technology Inc.
Logic Electrical Characteristics
Digital DC Characteristics
Unless otherwise noted, these specifications apply for +Vs=+3.3 Vdc. Boldface limits apply for TA=TJ=TMIN to
TMAX; all other limits TA=TJ=+25°C, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
LIMITS
UNITS
VIN (1)
Logical “1” Input Voltage
+Vs×××× 0.7
+Vs + 0.5
V (min)
V (max)
VIN (0)
Logical “0” Input Voltage
-0.3
+Vs××××0.3
V (min)
V (max)
IIN (1)
Logical “1”Intput Current
VIN=5V
0.005
1.0
µA
IIN (0)
Logical “0”Intput Current
VIN=0V
-0.005
-1.0
µA
CIN
All Digital Inputs
20
PF
IOH
High Level Output Current
VOH=5V
100
µA (max)
VOL
Low Level Output Voltage
IOL=3ma
0.4
V (max)
tOF
Output Fall Time
CL=400pF,IO=3ma
250
ns (max)
SMBus Digital Switching Characteristics
Unless otherwise noted, these specifications apply for +Vs = +3.3 Vdc and CL (load capacitance) on output lines =
80pF unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = +25°C,
unless otherwise noted.
The switching characteristics of the G751 fully meet or exceed the published specifications of the SMBus. The
following parameters are the timing relationships between SMBCLK and SMBDATA signals related to the G751.
They are not the SMBus specifications.
SYMBOL
PARAMETER
CONDITIONS TYPICAL LIMITS UNITS
t1
SMBCLK (Clock) Period
2.5
µs (min)
t2
Data in Set-Up Time to SMBCLK High
100
ns (min)
t3
Data Out Stable after SMBCLK Low
0
ns (min)
t4
SMBDATA Low Set-Up Time to SMBCLK Low (Start Condition)
100
ns (min)
t5
SMBDATA High Hold Time after SMBCLK High (Stop Condition)
100
ns (min)
Pin Description
PIN
LABEL
FUNCTION
TYPICAL CONNECTION
1
SMBDATA SMBus Serial Bi-Directional Data Line
From Controller
2
SMBCLK SMBus Clock Input
From Controller
3
O.S.
Overtemperature Shutdown Open Drain Output
Pull Up Resistor, Controller Interrupt Line
4
GND
Power Supply Ground
Ground
5,6,7
A0-A2
User-Set SMBus Address Inputs
Ground (Low, “0”) or +Vs (High, “1”)
8
+Vs
Positive Supply Voltage Input
DC Voltage from 3V to 5.5V
Logic Electrical Characteristics
SMBCLK
SMBDATA
Data in
SMBDATA
Data out
t1
t4
t2
t5
t
3
SMBCLK
SMBDATA
Data in
SMBDATA
Data out
t1
t4
t2
t5
t
3


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