MCP9805
DS21977C-page 4 2005-2013 Microchip Technology Inc.
Timing Diagram
SERIAL INTERFACE TIMING CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
DD
= 3.0V to 3.6V, GND = Ground, T
A
= -20°C to +125°C,
C
L
= 80 pF and all limits measured to 50% point.
Parameters Sym Min Typ Max Units Conditions
2-Wire SMBus/Standard Mode I
2
C™ Compatible Interface (Note)
Serial Port Clock Frequency f
SC
10 — 100 kHz
Low Clock t
LOW
4.7 — — µs
High Clock t
HIGH
4.0 — — µs
Rise Time t
R
— — 1000 ns (V
IL MAX
- 0.15V) to (V
IH MIN
+ 0.15V)
Fall Time t
F
— — 300 ns (V
IH MIN
+ 0.15V) to (V
IL MAX
- 0.15V)
Data Setup Before SCLK High t
SU-DATA
250 — — ns
Data Hold After SCLK Low t
HD-DATA
300 — — ns
Start Condition Setup Time t
SU-START
4.7 — — µs
Start Condition Hold Time t
HD-START
4.0 — — µs
Stop Condition Setup Time t
SU-STOP
4.0 — — µs
Bus Free t
B-FREE
4.7 — — µs
Time Out t
OUT
25 40 50 ms
Note: The serial interface specification min./max. limits are specified by characterization (not production tested).
t
SU-START
t
H-START
t
SU-DATA
t
SU-STOP
t
B-FREE
SCLK
SDA
t
H-DATA
t
HIGH
t
LOW
t
OUT
t
R
, t
F
START Condition
Data Transmission
STOP Condition
TEMPERATURE CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
DD
= 3.0V to 3.6V, GND = Ground.
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range T
A
-20 — +125 °C
Operating Temperature Range T
A
-40 — +125 °C Note 1
Storage Temperature Range T
A
-65 — +150 °C
Thermal Package Resistances
Thermal Resistance, 8L-DFN
JA
—41—°C/W
Thermal Resistance, 8L-TSSOP
JA
— 123.7 — °C/W
Note 1: Operation in this range must not cause T
J
to exceed Maximum Junction Temperature (+150°C).
