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SCN2681T Datasheet(PDF) 6 Page - NXP Semiconductors

Part No. SCN2681T
Description  Dual asynchronous receiver/transmitter DUART
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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SCN2681T Datasheet(HTML) 6 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
SCN2681T
Dual asynchronous receiver/transmitter (DUART)
1998 Sep 04
6
ABSOLUTE MAXIMUM RATINGS1
SYMBOL
PARAMETER
RATING
UNIT
TA
Operating ambient temperature range2
0 to +70
°C
TSTG
Storage temperature range
-65 to +150
°C
All voltages with respect to GND3
-0.5 to +6.0
V
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 conditions 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.
DC ELECTRICAL CHARACTERISTICS1, 2, 3
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
UNIT
VIL
Input low voltage
0.8
VIH
Input high voltage (except X1/CLK)
2.0
V
VIH
Input high voltage (X1/CLK)
3.5
VOL
Output low voltage
IOL = 2.4mA
0.4
V
VOH
Output high voltage (except o.c. outputs)4
IOH = -400µA
2.4
V
IIL
Input leakage current
VIN = 0 to VCC
-10
10
µA
ILL
Data bus 3-state leakage current
VO = 0.4 to VCC
-10
10
µA
IX1L
X1/CLK low input current
VIN = 0, X2 grounded
VIN = 0, X2 floated
-4
-3
-2
-1.5
0
0
mA
mA
IX1H
X1/CLK high input current
VIN = VCC, X2 = grounded
VIN = VCC, X2 floated
-1
0
0.2
3.5
1
10
mA
mA
IX2L
X2 low input current
VIN = 0, X1/CLK floated
-100
-30
0
µA
IX2H
X2 high input current
VIN = VCC, X1/CLK floated
0
+30
100
µA
IOC
Open-collector output leakage current
VO = 0.4 to VCC
-10
10
µA
ICC
Power supply current5
150
mA
NOTES:
1. Parameters are valid over specified temperature range. See Ordering information table for applicable operating temperature range and VCC
supply range.
2. All voltage measurements are referenced to ground (GND). For testing, all inputs except X1/CLK swing between 0.4V and 2.4V with a
transition time of 20ns maximum. For X1/CLK this swing is between 0.4V and 4.0V. All time measurements are referenced at input voltages
of 0.8V and 2.0V and output voltages of 0.8V and 2.0V as appropriate.
3. Typical values are at +25
°C, typical supply voltages, and typical processing parameters.
4. Test conditions for outputs: CL = 150pF, except interrupt outputs. Test conditions for interrupt outputs: CL = 50pF, RL = 2.7kΩ to VCC.
5. For bus operations, CEN and RDN (also CEN and WRN) are ANDed internally. As a consequence, the signal asserted last initiates the cycle
and the signal negated first terminates the cycle.
AC ELECTRICAL CHARACTERISTICS1, 2, 3, 4
SD00028
RESET
tRES
Figure 3. Reset Timing
NOTES:
1. Parameters are valid over specified temperature range. See Ordering information table for applicable operating temperature range and VCC
supply range.
2. All voltage measurements are referenced to ground (GND). For testing, all inputs except X1/CLK swing between 0.4V and 2.4V with a
transition time of 20ns maximum. For X1/CLK this swing is between 0.4V and 4.0V. All time measurements are referenced at input voltages
of 0.8V and 2.0V and output voltages of 0.8V and 2.0V as appropriate.
3. Typical values are at +25
°C, typical supply voltages, and typical processing parameters.
4. Test conditions for outputs: CL = 150pF, except interrupt outputs. Test conditions for interrupt outputs: CL = 50pF, RL = 2.7kΩ to VCC.


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