MCP3021
TIMING SPECIFICATIONS
Electrical Characteristics:
All parameters apply at V
DD
= 2.7V - 5.5V, V
SS
= GND, T
A
= -40°C to +85°C.
Parameters
I
2
C Standard Mode
Clock frequency
Clock high time
Clock low time
SDA and SCL rise time
SDA and SCL fall time
START condition hold time
START condition setup time
Data input setup time
STOP condition setup time
STOP condition hold time
Output valid from clock
Bus free time
Input filter spike suppression
I
2
C Fast Mode
Clock frequency
Clock high time
Clock low time
SDA and SCL rise time
SDA and SCL fall time
START condition hold time
START condition setup time
Data input hold time
Data input setup time
STOP condition setup time
STOP condition hold time
Output valid from clock
Bus free time
Input filter spike suppression
Note 1:
2:
F
SCL
T
HIGH
T
LOW
T
R
T
F
T
HD:STA
T
SU:STA
T
HD:DAT
T
SU:DAT
T
SU:STO
T
HD:STD
T
AA
T
BUF
T
SP
0
600
1300
20 + 0.1C
B
20 + 0.1C
B
600
600
0
100
600
600
—
1300
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
400
—
—
300
300
—
—
0.9
—
—
—
900
—
50
kHz
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
ns
SDA and SCL pins
From V
IL
to V
IH
From V
IL
to V
IH
f
SCL
T
HIGH
T
LOW
T
R
T
F
T
HD:STA
T
SU:STA
T
SU:DAT
T
SU:STO
T
HD:STD
T
AA
T
BUF
T
SP
0
4000
4700
—
—
4000
4700
250
4000
4000
—
4700
—
—
—
—
—
—
—
—
—
—
—
—
—
—
100
—
—
1000
300
—
—
—
—
—
3500
—
50
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SDA and SCL pins
From V
IL
to V
IH
From V
IL
to V
IH
Sym
Min
Typ
Max
Units
Conditions
This parameter is periodically sampled and not 100% tested.
Time the bus must be free before a new transmission can start.
T
F
T
HIGH
V
HYS
T
R
SCL
T
SU:STA
T
LOW
T
HD:DAT
T
SU:DAT
T
SU:STO
T
HD:STA
T
AA
T
BUF
SDA
IN
T
SP
SDA
OUT
FIGURE 1-1:
Standard and Fast Mode Bus Timing Data.
DS21805A-page 4
2003 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
