XR16L580 Datasheet, PDF (35/47 Pages) Exar Corporation – SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE

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REV. 1.2.0
XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
DC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC=2.25- 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
Input Low Leakage Current
I_IH
Input High Leakage Current
C_IN Input Pin Capacitance
I_CC Power Supply Current
I_SLEEP/
I_PWRSV
Sleep / Power-Save Current
(16 and 68 modes,
32-QFN Package)
I_SLEEP/ Sleep / Power-Save Current
I_PWRSV (16 mode, 48-TQFP Package)
I_SLEEP/ Sleep / Power-Save Current
I_PWRSV (68 mode, 48-TQFP Package)
LIMITS
2.5V
MIN
MAX
-0.3 0.6
LIMITS
3.3V
MIN
MAX
LIMITS
5.0V
MIN
MAX
UNITS
-0.3 0.6 -0.5 0.6
V
CONDITIONS
1.8 VCC 2.4 VCC 3.0 VCC V
-0.3 0.5 -0.3 0.8 -0.5 0.8
V
1.8 5.5 2.0 5.5 2.2 5.5
V
0.4
V I_OL = 6 mA
0.4
V I_OL = 4 mA
0.4
V I_OL = 2 mA
2.4
2.0
1.8
V I_OH = -6 mA
V I_OH = -1 mA
V I_OH = -400 uA
±10
±10
±10 uA See Test 1A
±10
±10
±10 uA See Test 1B
5
5
5
pF
1
2
3
mA
6
15
30
uA See Test 2
65
90
150 uA See Test 2
130
180
300 uA See Test 2
Test 1A: For 48-TQFP package only: The 16/68# pin has an internal pull-up resistor, so the input leakage
current is -80uA max.
Test 1B: For 48-TQFP package only: The PwrSave pin has an internal pull-down resistor, so the input leakage
current is 80uA max.
Test 2: The following inputs must remain steady at VCC or GND state to minimize sleep current: A0-A2, D0-
D7, IOR#, IOW# (R/W#), CS# and all modem inputs. Also, RXA and RXB inputs must idle at logic 1 state while
asleep. Floating inputs may result in sleep currents in the mA range. The 48-TQFP package has a higher
current because of the internal pull-up and pull-down resistors on the 16/68# and PwrSave pins respectively.
For Power-Save, the UART internally isolates all of these inputs (except the modem inputs, 16/68# and Reset
pins) therefore eliminating any unnecessary external buffers to keep the inputs steady. See “Power-Save
Feature” on page 18. To achieve minimum power drain, the voltage at any of the inputs of the L580 should NOT
be lower than its VCC supply.
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