Datasheet

Dual Serial UART with 128-Word FIFOs
MAX3109
8 Maxim Integrated
DC 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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
18
Input Power-Supply Current I
18
Baud rate = 1Mbps, 20MHz external clock,
PLL disabled, UART in loopback mode,
LDOEN = low (Note 4)
4 mA
SCLK/SCL, MISO/SDA
MISO/SDA Output Logic-Low
Voltage in I
2
C Mode
V
OLI2C
Sink current = 3mA, V
L
> 2V 0.4
V
Sink current = 3mA, V
L
< 2V
0.2 x
V
L
MISO/SDA Output Low Voltage
in SPI Mode
V
OLSPI
Sink current = 2mA 0.4 V
MISO/SDA Output High Voltage
in SPI Mode
V
OHSPI
Source current = 2mA
V
L
-
0.4
V
Input Logic-Low Voltage V
IL
SPI and I
2
C mode
0.3 x
V
L
V
Input Logic-High Voltage V
IH
SPI and I
2
C mode
0.7 x
V
L
V
Input Hysteresis V
HYST
SPI and I
2
C mode
0.05 x
V
L
V
Input Leakage Current I
IL
V
IN
= 0 to V
L,
SPI and I
2
C mode -1 +1
FA
Input Capacitance C
IN
SPI and I
2
C mode 5 pF
SPI/I2C, CS/A0, MOSI/A1 INPUTS
Input Logic-Low Voltage V
IL
SPI and I
2
C mode
0.3 x
V
L
V
Input Logic-High Voltage V
IH
SPI and I
2
C mode
0.7 x
V
L
V
Input Hysteresis V
HYST
SPI and I
2
C mode 50 mV
Input Leakage Current I
IL
V
IN
= 0 to V
L
, SPI and I
2
C mode -1 +1
FA
Input Capacitance C
IN
SPI and I
2
C mode 5 pF
IRQ OUTPUT (OPEN DRAIN)
Output Logic-Low Voltage V
OL
Sink current = 2mA 0.4 V
Output Leakage Current I
OL
V
IRQ
= 0 to V
L
, IRQ is not asserted
-1 +1
FA
LDOEN AND RST INPUTS
Input Logic-Low Voltage V
IL
0.3 x
V
L
V
Input Logic-High Voltage V
IH
0.7 x
V
L
V
Input Hysteresis V
HYST
50 mV
Input Leakage Current I
IL
V
IN
= 0 to V
L
-1 +1
FA