XR16L2551
36
LOW VOLTAGE DUART WITH POWERSAVE
REV. 1.1.3
Test 1: The following inputs must remain steady at VCC or GND state to minimize sleep current: A0-A2, D0-D7,
IOR#, IOW# (R/W#), CSA# (CS#), CSB# (A3) 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. For Powersave, the
UART internally isolates all of these inputs therefore not requiring them to remain steady.
ABSOLUTE MAXIMUM RATINGS
Power Supply Range
7 Volts
Voltage at Any Pin
GND-0.3 V to +5.5 V
Operating Temperature
-40o to +85oC
Storage Temperature
-65o to +150oC
Package Dissipation
500 mW
TYPICAL PACKAGE THERMAL RESISTANCE DATA (MARGIN OF ERROR: ± 15%)
Thermal Resistance (48-TQFP)
theta-ja =59oC/W, theta-jc = 16oC/W
Thermal Resistance (32-QFN)
theta-ja = 33oC/W, theta-jc = 22oC/W
ELECTRICAL CHARACTERISTICS
DC ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA=-40o to +85oC, Vcc is 2.25 to 5.5V
SYMBOL
PARAMETER
2.5V LIMITS
MIN
MAX
3.3V LIMITS
MIN
MAX
5.0V LIMITS
MIN
MAX
UNITS
CONDITIONS
VILCK
Clock Input Low Level
-0.3
0.2
-0.3
0.6
-0.5
0.6
V
VIHCK
Clock Input High Level
2.0
5.5
2.4
5.5
3.0
5.5
V
VIL
Input Low Voltage
-0.3
0.6
-0.3
0.8
-0.5
0.8
V
VIH
Input High Voltage
2.0
5.5
2.0
5.5
2.2
5.5
V
VOL
Output Low Voltage
0.4
V
IOL = 6 mA
IOL = 4 mA
IOL = 2 mA
VOH
Output High Voltage
1.8
2.0
2.4
V
IOH = -6 mA
IOH = -1 mA
IOH = -400 uA
IIL
Input Low Leakage Current
±10
uA
IIH
Input High Leakage Current
±10
uA
CIN
Input Pin Capacitance
5
pF
ICC
Power Supply Current
1
1.3
3
mA
ISLEEP
IPWRSV
Sleep Current/
Powersave Current
6
15
30
uA
See Test 1