Microchip Technology MCP3421DM-WS 데이터 시트
© 2009 Microchip Technology Inc.
DS22003E-page 25
MCP3421
High-Speed Mode (3.4 MHz): Not recommended for V
DD
< 2.7V
Clock frequency
f
SCL
—
—
3.4
MHz
C
b
= 100 pF
—
—
1.7
MHz
C
b
= 400 pF
Clock high time
T
HIGH
60
—
—
ns
C
b
= 100 pF, f
SCL
= 3.4 MHz
120
—
—
ns
C
b
= 400 pF, f
SCL
= 1.7 MHz
Clock low time
T
LOW
160
—
—
ns
C
b
= 100 pF, f
SCL
= 3.4 MHz
320
—
—
ns
C
b
= 400 pF, f
SCL
= 1.7 MHz
SCL rise time
(Note 1)
(Note 1)
T
R
—
—
40
ns
From V
IL
to V
IH
,
C
b
= 100 pF, f
SCL
= 3.4 MHz
—
—
80
ns
From V
IL
to V
IH
,
C
b
= 400 pF, f
SCL
= 1.7 MHz
SCL fall time
(Note 1)
(Note 1)
T
F
—
—
40
ns
From V
IH
to V
IL
,
C
b
= 100 pF, f
SCL
= 3.4 MHz
—
—
80
ns
From V
IH
to V
IL
,
C
b
= 400 pF, f
SCL
= 1.7 MHz
SDA rise time
(Note 1)
(Note 1)
T
R: DAT
—
—
80
ns
From V
IL
to V
IH
,
C
b
= 100 pF, f
SCL
= 3.4 MHz
—
—
160
ns
From V
IL
to V
IH
,
C
b
= 400 pF, f
SCL
= 1.7 MHz
SDA fall time
(Note 1)
(Note 1)
T
F: DATA
—
—
80
ns
From V
IH
to V
IL
,
C
b
= 100 pF, f
SCL
= 3.4 MHz
—
—
160
ns
From V
IH
to V
IL
,
C
b
= 400 pF, f
SCL
= 1.7 MHz
Data hold time
(Note 4)
(Note 4)
T
HD:DAT
0
—
70
ns
C
b
= 100 pF, f
SCL
= 3.4 MHz
0
—
150
ns
C
b
= 400 pF, f
SCL
= 1.7 MHz
Output valid from clock
(Notes 2 and 3)
(Notes 2 and 3)
T
AA
—
—
150
ns
C
b
= 100 pF, f
SCL
= 3.4 MHz
—
—
310
ns
C
b
= 400 pF, f
SCL
= 1.7 MHz
START condition hold time
T
HD:STA
160
—
—
ns
START (Repeated) condition
setup time
setup time
T
SU:STA
160
—
—
ns
Data input setup time
T
SU:DAT
10
—
—
ns
STOP condition setup time
T
SU:STO
160
—
—
ns
TABLE 5-4:
I
2
C SERIAL TIMING SPECIFICATIONS (CONTINUED)
Electrical Specifications: Unless otherwise specified, all limits are specified for T
A
= -40 to +85°C,
V
IN
+ = V
IN
- = V
REF
/2, V
SS
= 0V, V
DD
= +2.7V to +5.0V.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Note 1: This parameter is ensured by characterization and not 100% tested.
2: This specification is not a part of the I
2
C specification. This specification is equivalent to the Data Hold
Time (T
HD:DAT
) plus SDA Fall (or rise) time: T
AA
= T
HD:DAT
+ T
F
(
OR
T
R
).
3: If this parameter is too short, it can create an unintended Start or Stop condition to other devices on the
bus line. If this parameter is too long, Clock Low time (T
LOW
) can be affected.
4: For Data Input: This parameter must be longer than t
SP
. If this parameter is too long, the Data Input Setup
(T
SU:DAT
) or Clock Low time (T
LOW
) can be affected.
For Data Output: This parameter is characterized, and tested indirectly by testing T
AA
parameter.