XR16L570_07 Datasheet, PDF (35/47 Pages) Exar Corporation – SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE

XR16L570
REV. 1.0.1
SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
DC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA= -40^O TO +85^OC, VCC=2.97 - 5.5V
SYMBOL
PARAMETER
V_ILCK
V_IHCK
V_IL
V_IH
V_OL
Clock Input Low Level
Clock Input High Level
Input Low Voltage
Input High Voltage
Output Low Voltage
V_OH
Output High Voltage
I_IL
I_IH
C_IN
I_CC
I_SLEEP/I_PWRSV
Input Low Leakage Current
Input High Leakage Current
Input Pin Capacitance
Power Supply Current
Sleep / Power-Save Current
LIMITS
3.3V
MIN
MAX
-0.3 0.6
2.4 VCC
-0.3 0.8
2.0 5.5
0.4
2.0
±10
±10
5
2
15
LIMITS
5.0V
MIN
MAX
-0.5 0.6
3.0 VCC
-0.5 0.8
2.2 5.5
0.4
2.4
±10
±10
5
3
30
UNITS CONDITIONS
V
V
V
V
V I_OL = 6 mA
V I_OL = 4 mA
V I_OH = -6 mA
V I_OH = -1 mA
uA
uA
pF
mA
uA See Test
DC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA= -40^O TO +85^OC, VCC=1.62 - 2.75V
SYMBOL
PARAMETER
V_ILCK
V_IHCK
V_IL
V_IH
V_OL
Clock Input Low Level
Clock Input High Level
Input Low Voltage
Input High Voltage
Output Low Voltage
V_OH
Output High Voltage
I_IL
I_IH
C_IN
I_CC
I_SLEEP/I_PWRSV
Input Low Leakage Current
Input High Leakage Current
Input Pin Capacitance
Power Supply Current
Sleep Current
LIMITS
1.8V
MIN
MAX
-0.3 0.3
1.4 VCC
-0.3 0.2
1.4 5.5
0.4
1.4
±10
±10
5
0.5
3
LIMITS
2.5V
MIN
MAX
-0.3 0.6
1.8 VCC
-0.3 0.5
1.8 5.5
0.4
1.8
±10
±10
5
1
6
UNITS CONDITIONS
V
V
V
V
V I_OL = 2 mA
V _{IOL = 1.5 mA}
V I_OH = -400 uA
V _{IOH = -200 uA}
uA
uA
pF
mA
uA See Test
Test: The following inputs must remain steady at VCC or GND state to minimize sleep current: A0-A2, D0-D7, IOR#, IOW#,
CS# and all modem inputs. Also, RX input must idle at logic 1 state while asleep. Floating inputs may result in sleep
currents in the mA range.
For PowerSave, the UART internally isolates all of these inputs (except the modem input CTS# and Reset pins) therefore
eliminating any unnecessary external buffers to keep the inputs steady. SEE”POWER-SAVE FEATURE” ON PAGE 17. To
achieve minimum power drain, the voltage at any of the inputs of the L570 should NOT be lower than its VCC supply.
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