Datasheet

10 Maxim Integrated
Quad Serial UART with 128-Word FIFOs
MAX14830
DC ELECTRICAL CHARACTERISTICS (continued)
(V
A
= +2.35V 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
A
= +2.5V, V
L
= +1.8V, V
EXT
= +2.8V, T
A
= +25NC.) (Notes 2, 3)
AC ELECTRICAL CHARACTERISTICS
(V
A
= +2.35V 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
A
= +2.8V, V
L
= +1.8V, V
EXT
= +2.5V, T
A
= +25NC.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RX0, RX1, RX2, RX3, CTS0, CTS1, CTS2, CTS3 INPUTS
Input Low Voltage V
IL
0.3 x V
EXT
V
Input High Voltage V
IH
0.7 x V
EXT
V
Input Hysteresis V
HYST
50 mV
CTS0, CTS1, CTS2, CTS3 Input
Leakage Current
I
IN_CTS
V
CTS_
= 0 to V
EXT
-1 +1
FA
RX0, RX1, RX2, RX3 Pullup
Current
I
IN_RX_
V
RX_
= 0V, V
EXT
= 3.6V -7.5 -5.5 -3.5
FA
Input Capacitance C
IN_UART
5 pF
GPIO0–GPIO15 INPUTS/OUTPUTS
Output Low Voltage V
OL
I
LOAD
= -20mA, V
EXT
> 2.3V, push-pull or
open drain
0.45
V
I
LOAD
= -20mA, V
EXT
< 2.3V, push-pull or
open drain
0.55
Output High Voltage V
OH
I
LOAD
= 5mA, push-pull V
EXT
- 0.4 V
Input Low Voltage V
IL
GPIO_ is configured as an input 0.4 V
Input High Voltage V
IH
GPIO_ is configured as an input 2/3 x V
EXT
V
Pulldown Current I
PD
GPIO_ = V
EXT
= 3.6V 3.5 5.5 7.5
FA
XIN
Input Low Voltage V
IL
0.2 V
Input High Voltage V
IH
1.2 V
Input Capacitance C
XIN
16 pF
XOUT
Input Capacitance C
XOUT
16 pF
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
INTERNAL OSCILLATOR
External Crystal Frequency f
XOSC
1 4 MHz
External Clock Frequency f
CLK
0.5 35 MHz
External Clock Duty Cycle (Note 5) 45 55 %
Baud-Rate Generator Clock
Input
f
REF
(Note 5) 96 MHz