Datasheet

© 2010 Microchip Technology Inc. DS22187E-page 9
MCP4728
SCL Rise Time
(Note 1)
T
RSCL
— — 1000 ns Standard Mode
20 + 0.1Cb — 300 ns Fast Mode
20 — 80 ns High Speed Mode 1.7
20 — 160 ns High Speed Mode 1.7
(Note 2)
10 — 40 ns High Speed Mode 3.4
10 — 80 ns High Speed Mode 3.4
(Note 2)
SDA Rise Time
(Note 1)
T
RSDA
— — 1000 ns Standard Mode
20 + 0.1Cb — 300 ns Fast Mode
20 — 80 ns High Speed Mode 1.7
10 — 40 ns High Speed Mode 3.4
SCL Fall Time
(Note 1)
T
FSCL
— — 300 ns Standard Mode
20 + 0.1Cb — 300 ns Fast Mode
20 — 80 ns High Speed Mode 1.7
10 — 40 ns High Speed Mode 3.4
SDA Fall Time
(Note 1)
T
FSDA
— — 300 ns Standard Mode
20 + 0.1Cb — 300 ns Fast Mode
20 — 160 ns High Speed Mode 1.7
10 — 80 ns High Speed Mode 3.4
Data Input Setup Time
T
SU:DAT
250 — — ns Standard Mode
100 — — ns Fast Mode
10 — — ns High Speed Mode 1.7
10 — — ns High Speed Mode 3.4
Data Hold Time
(Input, Output)
(Note 3)
T
HD:DAT
0 — 3450 ns Standard Mode
0 — 900 ns Fast Mode
0 — 150 ns High Speed Mode 1.7
0 — 70 ns High Speed Mode 3.4
Output Valid from Clock
(Note 4)
T
AA
0 — 3750 ns Standard Mode
0 — 1200 ns Fast Mode
0 — 310 ns High Speed Mode 1.7
0 — 150 ns High Speed Mode 3.4
I
2
C SERIAL TIMING SPECIFICATIONS (CONTINUED)
Electrical Specifications: Unless otherwise specified, all limits are specified for T
A
= -40 to +125°C, V
SS
= 0V,
Standard and Fast Mode: V
DD
= +2.7V to +5.5V
High Speed Mode: V
DD
= +4.5V to +5.5V.
Parameters Sym Min Typ Max Units Conditions
Note 1:
This parameter is ensured by characterization and is not 100% tested.
2: After a Repeated Start condition or an Acknowledge bit.
3: If this parameter is too short, it can create an unintentional Start or Stop condition to other devices on the I
2
C bus line. If
this parameter is too long, the Data Input Setup (T
SU:DAT
) or Clock Low time (T
LOW
) can be affected.
Data Input: This parameter must be longer than t
SP
.
Data Output: This parameter is characterized, and tested indirectly by testing T
AA
parameter.
4: 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
FSDA
(OR T
RSDA
).
5: Time between Start and Stop conditions.