Datasheet

 2010 Microchip Technology Inc. DS21909D-page 5
MCP9800/1/2/3
Timing Diagram
SERIAL INTERFACE TIMING SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, V
DD
= 2.7V to 5.5V, GND = Ground, -55°C < T
A
< +125°C,
C
L
= 80 pF, and all limits measured to 50% point.
Parameters Sym Min Typ Max Units Conditions
2-Wire I
2
C™/SMBus Compatible Interface
Serial Port Frequency f
SC
0 — 400 kHz I
2
C MCP9800/01
f
SC
10 — 400 kHz SMBus MCP9802/03
Clock Period t
SC
2.5 — — µs
Low Clock t
LOW
1.3 — — µs
High Clock t
HIGH
0.6 — — µs
Rise Time t
R
20 — 300 ns 10% to 90% of V
DD
(SCLK, SDA)
Fall Time t
F
20 — 300 ns 90% to 10% of V
DD
(SCLK, SDA)
Data Setup Before SCLK High t
SU-DATA
0.1 — — µs
Data Hold After SCLK Low t
H-DATA
0—0.9µs
Start Condition Setup Time t
SU-START
0.6 — — µs
Start Condition Hold Time t
H-START
0.6 — — µs
Stop Condition Setup Time t
SU-STOP
0.6 — — µs
Bus Idle t
IDLE
1.3 — — µs
Time Out t
OUT
25 35 50 ms MCP9802/03 only
t
SU-START
t H
-START
t
SU
-
D
A
TA
t
SU
-
S
TO
P
t
B-FREE
SCL
SDA
t
H-DATA
t
H
I
G
H
t LOW
t
R
,
t
F
Start Condition
Data Transmission
Stop Condition