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MCP9808 bảng dữ liệu(PDF) 5 Page - Microchip Technology

tên linh kiện MCP9808
Giải thích chi tiết về linh kiện  짹0.5째C Maximum Accuracy Digital Temperature Sensor
PDF  52 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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MCP9808 bảng dữ liệu(HTML) 5 Page - Microchip Technology

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© 2011 Microchip Technology Inc.
DS25095A-page 5
MCP9808
TIMING DIAGRAM
SENSOR SERIAL INTERFACE TIMING SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, V
DD = 2.7V to 5.5V, TA = -40°C to +125°C, GND = Ground
and CL = 80 pF. (Note 1)
Parameters
Sym
Min
Max
Units
Conditions
2-Wire SMBus/Standard Mode I2C™ Compatible Interface (Note 1)
Serial Port Clock Frequency
fSC
0400
kHz
(Note 2, 4)
Low Clock
tLOW
1300
—
ns
(Note 2)
High Clock
tHIGH
600
—
ns
(Note 2)
Rise Time
tR
20
300
ns
Fall Time
tF
20
300
ns
Data in Setup Time
tSU-DI
100
—
ns
(Note 3)
Data In Hold Time
tHD-DI
0—
ns
(Note 5)
Data Out Hold Time
tHD-DO
200
900
ns
(Note 4)
Start Condition Setup Time
tSU-START
600
—
ns
Start Condition Hold Time
tHD-START
600
—
ns
Stop Condition Setup Time
tSU-STOP
600
—
ns
Bus Free
tB-FREE
1300
—
ns
Time-out
tOUT
25
35
ms
Bus Capacitive Load
Cb
—400
pf
Note 1:
All values referred to VIL MAX and VIH MIN levels.
2:
If tLOW > tOUT or tHIGH > tOUT, the temperature sensor I
2C interface will time-out. A Repeat Start command
is required for communication.
3:
This device can be used in a Standard mode I2C bus system, but the requirement, tSU-DI ≥ 100 ns, must
be met. This device does not stretch the SCL Low time.
4:
As a transmitter, the device provides internal minimum delay time, tHD-DO MIN, to bridge the undefined
region (min. 200 ns) of the falling edge of SCL, tF MAX, to avoid unintended generation of Start or Stop
conditions.
5:
As a receiver, SDA should not be sampled at the falling edge of SCL. SDA can transition tHD-DI 0 ns after
SCL toggles Low.
tSU-START
tHD-START
tSU-DI
tSU-STOP
tB-FREE
SCL
SDA
tHD-DI/tHD-DO
tHIGH
tLOW
tOUT
tR, tF
START Condition
Data Transmission
STOP Condition



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