Datasheet

Dual Serial UART with 128-Word FIFOs
MAX3109
11Maxim Integrated
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.71V to 3.6V, V
L
= 1.71V to 3.6V, V
EXT
= 1.71V to 3.6V T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at
V
CC
= 2.8V, V
L
= 1.8V, V
EXT
= 2.5V, T
A
= +25NC.) (Notes 2, 3)
Note 2:
All units are production tested at T
A
= +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 V
18
is powered by an external voltage supply, it must have current capability above or equal to I
18
.
Note 5: Guaranteed by design; not production tested.
Note 6: C
B
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 t
SU:STO
Standard mode 4.7
Fs
Fast mode 0.6
Fast mode plus 0.26
Capacitive Load for SDA and
SCL
C
B
Standard mode (Note 5) 400
pFFast mode (Note 5) 400
Fast mode plus (Note 5) 550
SCL and SDA I/O Capacitance C
I/O
(Note 5) 10 pF
Pulse Width of Spike Suppressed t
SP
50 ns
SPI BUS: TIMING CHARACTERISTICS (Figure 2)
SCLK Clock Period t
CH
+t
CL
38.4 ns
SCLK Pulse Width High t
CH
16 ns
SCLK Pulse Width Low t
CL
16 ns
CS Fall to SCLK Rise Time
t
CSS
0 ns
MOSI Hold Time t
DH
3 ns
MOSI Setup Time t
DS
5 ns
Output Data Propagation Delay t
DO
20 ns
MISO Rise and Fall Times t
FT
10 ns
CS Hold Time
t
CSH
30 ns