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Philips Semiconductors
3.3 V or 5.0 V Universal Asynchronous
Receiver/Transmitter (UART)
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
T
Operating ambient temperature range
amb
T
Storage temperature range
stg
V
Voltage from V
CC
CC
V
Voltage from any pin to GND
S
P
Package power dissipation (PLCC44)
D
P
Package power dissipation (PQFP44)
D
Derating factor above 25 C (PLCC44)
Derating factor above 25 C (PQFP44)
NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other condition above those indicated in the operation section of this specification is not
implied.
2. For operating at elevated temperatures, the device must be derated based on +150 C maximum junction temperature.
3. This product includes circuitry specifically designed for the protection of its internal devices from damaging effects of excessive static
charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying any voltages larger than the rated maxima.
4. Parameters are valid over specified temperature and voltage range.
DC ELECTRICAL CHARACTERISTICS
V
= 5 V
10 %, T
= –40 C to +85 C, unless otherwise specified.
CC
amb
Symbol
Parameter
V
Input low voltage
IL
V
Input high voltage (except X1/CLK)
IH
V
Input high voltage (X1/CLK)
IH
V
Output low voltage
OL
V
Output high voltage (except OD outputs)
OH
I
X1/CLK input current - power down
IX1PD
I
X1/CLK input low current - operating
ILX1
I
X1/CLK input high current - operating
IHX1
Input leakage current:
All except input port pins
I
I
5
Input port pins
I
Output off current high, 3-State data bus
OZH
I
Output off current low, 3-State data bus
OZL
I
Open-drain output low current in off-state
ODL
I
Open-drain output high current in off-state
ODH
Power supply current
I
Operating mode
CC
Power down mode
NOTES:
1. Parameters are valid over specified temperature and voltage range.
2. All voltage measurements are referenced to ground (GND). For testing, all inputs swing between 0.4 V and 3.0 V with a transition time of
5 ns maximum. For X1/CLK, this swing is between 0.4 V and 0.8V
2.0 V and output voltages of 0.8 V and 2.0 V, as appropriate.
3. Typical values are at +25 C, typical supply voltages, and typical processing parameters.
4. Test conditions for outputs: C
L
constant current source = 2.6 mA.
5. Input port pins have active pull-up transistors that will source a typical 2 A from V
Input port pins at V
source 0.0 A.
CC
6. All outputs are disconnected. Inputs are switching between CMOS levels of V
2004 Oct 21
1
2
3
to GND
3
1, 2, 3
4
6
= 125 pF, except open drain outputs. Test conditions for open drain outputs: C
Rating
Note 4
–65 to +150
–0.5 to +7.0
–0.5 to V
2.4
1.78
19
14
Conditions
Min
2.4
0.8V
I
= 2.4 mA
OL
V
I
= –400 A
OH
0.5
V
= 0 V to V
IN
CC
V
= 0 V
–130
IN
V
= V
0
IN
CC
V
= 0 V to V
–0.5
IN
CC
V
= 0 V to V
–8
IN
CC
V
= V
IN
CC
V
= 0 V
–0.5
IN
V
= 0 V
–0.5
IN
V
= V
IN
CC
CMOS input levels
CMOS input levels
. All time measurements are referenced at input voltages of 0.8 V and
CC
when the input pins are at V
CC
– 0.2 V and V
+ 0.2 V.
CC
SS
10
Product data sheet
SC28L91
Unit
C
C
V
+0.5
V
CC
W
W
mW/ C
mW/ C
Typ
Max
Unit
0.8
V
1.5
V
2.4
V
CC
0.2
0.4
V
– 0.5
V
CC
0.05
0.5
A
0
A
130
A
0.05
+0.5
A
0.05
+0.5
A
0.5
A
A
A
0.5
A
7
25
mA
1
5
A
= 125 pF,
L
.
SS
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