參數資料
型號： 935026920512
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQCC44
封裝： PLASTIC, MO-047AC, SOT-187-2, LCC-44
文件頁數： 30/34頁
文件大小： 313K
代理商： 935026920512
Philips Semiconductors
Product specification
SCN2681
Dual asynchronous receiver/transmitter (DUART)
1998 Sep 04
5
PIN DESCRIPTION (Continued)
SYMBOL
APPLICABLE
TYPE
NAME AND FUNCTION
SYMBOL
40/44
28
24
TYPE
NAME AND FUNCTION
IP5
X
I
Input 5: General purpose input or Channel B transmitter external clock input (TxCB). When
the external clock is used by the transmitter, the transmitted data is clocked on the falling
edge of the clock. Pin has an internal VCC pull-up device supplying 1 to 4 mA of current.
IP6
X
I
Input 6: General purpose input or Channel B receiver external clock input (RxCB). When the
external clock is used by the receiver, the received data is sampled on the rising edge of the
clock. Pin has an internal VCC pull-up device supplying 1 to 4 mA of current.
VCC
X
I
Power Supply: +5V supply input.
GND
X
I
Ground
ABSOLUTE MAXIMUM RATINGS1
SYMBOL
PARAMETER
RATING
UNIT
TA
Operating ambient temperature range2
See Note 4
°C
TSTG
Storage temperature range
-65 to +150
°C
All voltages with respect to ground3
-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 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 +150oC 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 range. See Ordering information table for applicable operating temperature range and VCC
supply range.
DC ELECTRICAL CHARACTERISTICS1, 2, 3 TA = -40°C to +85°C, VCC = +5.0V " 10%
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
UNIT
VIL
VIH
VOL
VOH
Input low voltage
Input high voltage (except X1/CLK)5
Input high voltage (except X1/CLK)4
Input high voltage (X1/CLK)
Output low voltage
Output high voltage (except o.d. outputs)5
Output high voltage (except o.d. outputs)4
IOL = 2.4mA
IOH = -400A
2
2.5
4
2.4
2.9
0.8
0.4
V
IIL
ILL
IX1L
IX1H
IX2L
IX2H
IOC
IOCC
Input leakage current
Data bus 3-stage leakage current
X1/CLK low input current
X1/CLK high input current
X2 low input current
X2 high input current
Open-collector output leakage current
Power supply current
VIN = 0 to VCC
VO = 0.4 to VCC
VIN = 0, X2 grounded
VIN = 0, X2 floated
VIN = VCC, X2 grounded
VIN = VCC, X2 floated
VIN = 0, X1/CLK floated
VIN = VCC, X1/CLK floated
VO = 0.4 to VCC
0
°C to +70°C version
-40
°C to +85°C version
-10
-4
-3
-1
0
-100
0
-10
-2
-1.5
0.2
3.5
-30
+30
10
0
1
10
0
100
10
150
175
A
mA
A
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 4.4V. All time measurements are referenced at input voltages
of 0.8V and 2.0V as appropriate.
3. Typical values are at +25
°C, typical supply voltages, and typical processing parameters.
4. TA < 0°C
5. TA > 0°C
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