10
Maxim Integrated
Quad Serial UART with 128-Word FIFOs
MAX14830
DC 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 = +2.5V, VL = +1.8V, VEXT = +2.8V, TA = +25NC.) (Notes 2, 3)
AC ELECTRICAL CHARACTERISTICS
(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
RX0, RX1, RX2, RX3, CTS0, CTS1, CTS2, CTS3 INPUTS
Input Low Voltage
VIL
0.3 x VEXT
V
Input High Voltage
VIH
0.7 x VEXT
V
Input Hysteresis
VHYST
50
mV
CTS0, CTS1, CTS2, CTS3 Input
Leakage Current
IIN_CTS
VCTS_ = 0 to VEXT
-1
+1
F
A
RX0, RX1, RX2, RX3 Pullup
Current
IIN_RX_
VRX_ = 0V, VEXT = 3.6V
-7.5
-5.5
-3.5
F
A
Input Capacitance
CIN_UART
5
pF
GPIO0–GPIO15 INPUTS/OUTPUTS
Output Low Voltage
VOL
ILOAD = -20mA, VEXT > 2.3V, push-pull or
open drain
0.45
V
ILOAD = -20mA, VEXT < 2.3V, push-pull or
open drain
0.55
Output High Voltage
VOH
ILOAD = 5mA, push-pull
VEXT - 0.4
V
Input Low Voltage
VIL
GPIO_ is configured as an input
0.4
V
Input High Voltage
VIH
GPIO_ is configured as an input
2/3 x VEXT
V
Pulldown Current
IPD
GPIO_ = VEXT = 3.6V
3.5
5.5
7.5
F
A
XIN
Input Low Voltage
VIL
0.2
V
Input High Voltage
VIH
1.2
V
Input Capacitance
CXIN
16
pF
XOUT
Input Capacitance
CXOUT
16
pF
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INTERNAL OSCILLATOR
External Crystal Frequency
fXOSC
1
4
MHz
External Clock Frequency
fCLK
0.5
35
MHz
External Clock Duty Cycle
(Note 5)
45
55
%
Baud-Rate Generator Clock
Input
fREF
(Note 5)
96
MHz