
11
Maxim Integrated
Quad Serial UART with 128-Word FIFOs
MAX14830
AC ELECTRICAL CHARACTERISTICS (continued)
(VA = +2.35V to +3.6V, VL = +1.71V to +3.6V, VEXT = +1.71V to +3.6V, TA = -40NC to +85NC, unless otherwise noted. Typical values
are at VA = +2.8V, VL = +1.8V, VEXT = +2.5V, TA = +25NC.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I2C BUS: TIMING CHARACTERISTICS (SEE FIGURE 1)
SCL Clock Frequency
fSCL
Standard mode
100
kHz
Fast mode
400
Fast mode plus
1000
Bus Free Time Between a STOP
and START Condition
tBUF
Standard mode
4.7
F
s
Fast mode
1.3
Fast mode plus
0.5
Hold Time for START Condition
and Repeated START Condition
tHD:STA
Standard mode
4.0
F
s
Fast mode
0.6
Fast mode plus
0.26
Low Period of the SCL Clock
tLOW
Standard mode
4.7
F
s
Fast mode
1.3
Fast mode plus
0.5
High Period of the SCL Clock
tHIGH
Standard mode
4.0
F
s
Fast mode
0.6
Fast mode plus
0.26
Data Hold Time
tHD:DAT
Standard mode
0
0.9
F
s
Fast mode
0
0.9
Fast mode plus
0
Data Setup Time
tSU:DAT
Standard mode
250
ns
Fast mode
100
Fast mode plus
50
Setup Time for Repeated START
Condition
tSU:STA
Standard mode
4.7
F
s
Fast mode
0.6
Fast mode plus
0.26
Rise Time of SDA and SCL
Signals Receiving
tR
Standard mode (0.3 x VL to 0.7 x VL)
(Note 6)
20 +
0.1Cb
1000
ns
Fast mode (0.3 x VL to 0.7 x VL) (Note 6)
20 +
0.1Cb
300
Fast mode plus
120
Fall Time of SDA and SCL
Signals
tF
Standard mode (0.7 x VL to 0.3 x VL)
(Note 6)
20 +
0.1Cb
300
ns
Fast mode (0.7 x VL to 0.3 x VL) (Note 6)
20 +
0.1Cb
300
Fast mode plus
120
Setup Time for STOP Condition
tSU:STO
Standard mode
4.7
F
s
Fast mode
0.6
Fast mode plus
0.26
Capacitive Load for SDA and
SCL (Note 4)
Cb
Standard mode
400
pF
Fast mode
400
Fast mode plus
550