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Dual Serial UART with 128-Word FIFOs
MAX3109
11
Maxim Integrated
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.71V 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
VCC = 2.8V, VL = 1.8V, VEXT = 2.5V, TA = +25NC.) (Notes 2, 3)
Note 2: All units are production tested at TA = +25NC. Specifications over temperature are guaranteed by design.
Note 3: Currents entering the IC are negative and currents exiting the IC are positive.
Note 4: When V18 is powered by an external voltage supply, it must have current capability above or equal to I18.
Note 5: Guaranteed by design; not production tested.
Note 6: CB is the total capacitance of either the clock or data line of the synchronous bus in pF.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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
CB
Standard mode (Note 5)
400
pF
Fast mode (Note 5)
400
Fast mode plus (Note 5)
550
SCL and SDA I/O Capacitance
CI/O
(Note 5)
10
pF
Pulse Width of Spike Suppressed
tSP
50
ns
SPI BUS: TIMING CHARACTERISTICS (Figure 2)
SCLK Clock Period
tCH+tCL
38.4
ns
SCLK Pulse Width High
tCH
16
ns
SCLK Pulse Width Low
tCL
16
ns
CS Fall to SCLK Rise Time
tCSS
0
ns
MOSI Hold Time
tDH
3
ns
MOSI Setup Time
tDS
5
ns
Output Data Propagation Delay
tDO
20
ns
MISO Rise and Fall Times
tFT
10
ns
CS Hold Time
tCSH
30
ns