MCP4728
DS22187E-page 8
2010 Microchip Technology Inc.
I2C SERIAL TIMING SPECIFICATIONS
Electrical Specifications: Unless otherwise specified, all limits are specified for T
A = -40 to +125°C, VSS = 0V,
Standard and Fast Mode: VDD = +2.7V to +5.5V
High Speed Mode: VDD = +4.5V to +5.5V.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Clock Frequency
fSCL
0
—
100
kHz
Standard Mode
Cb = 400 pF, 2.7V – 5.5V
0
—
400
kHz
Fast Mode
Cb = 400 pF, 2.7V – 5.5V
0
—
1.7
MHz
High Speed Mode 1.7
Cb = 400 pF, 4.5V – 5.5V
0
—
3.4
MHz
High Speed Mode 3.4
Cb = 100 pF, 4.5V – 5.5V
Bus Capacitive Loading
Cb
—
400
pF
Standard Mode
2.7V – 5.5V
—
400
pF
Fast Mode
2.7V – 5.5V
—
400
pF
High Speed Mode 1.7
4.5V – 5.5V
—
100
pF
High Speed Mode 3.4
4.5V – 5.5V
Start Condition Setup Time
(Start, Repeated Start)
TSU:STA
4700
—
ns
Standard Mode
600
—
ns
Fast Mode
160
—
ns
High Speed Mode 1.7
160
—
ns
High Speed Mode 3.4
Start Condition Hold Time
THD:STA
4000
—
ns
Standard Mode
600
—
ns
Fast Mode
160
—
ns
High Speed Mode 1.7
160
—
ns
High Speed Mode 3.4
Stop Condition Setup Time
TSU:STO
4000
—
ns
Standard Mode
600
—
ns
Fast Mode
160
—
ns
High Speed Mode 1.7
160
—
ns
High Speed Mode 3.4
Clock High Time
THIGH
4000
—
ns
Standard Mode
600
—
ns
Fast Mode
120
—
ns
High Speed Mode 1.7
60
—
ns
High Speed Mode 3.4
Clock Low Time
TLOW
4700
—
ns
Standard Mode
1300
—
ns
Fast Mode
320
—
ns
High Speed Mode 1.7
160
—
ns
High Speed Mode 3.4
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 I2C bus line. If
this parameter is too long, the Data Input Setup (TSU:DAT) or Clock Low time (TLOW) 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 I2C specification. This specification is equivalent to the Data Hold Time (THD:DAT)
plus SDA Fall (or rise) time: TAA = THD:DAT + TFSDA (OR TRSDA).
5:
Time between Start and Stop conditions.