參數(shù)資料
型號： SCN2681AC1N24
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Dual asynchronous receiver/transmitter DUART
中文描述： 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP24
封裝： 0.400 INCH, PLASTIC, SOT-248-1, DIP-24
文件頁數(shù)： 5/30頁
文件大?。?/td> 205K
代理商： SCN2681AC1N24
Philips Semiconductors
Product specification
SCN2681
Dual asynchronous receiver/transmitter (DUART)
1998 Sep 04
5
PIN DESCRIPTION
(Continued)
SYMBOL
APPLICABLE
TYPE
NAME AND FUNCTION
40/44
X
28
24
IP5
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 V
CC
pull-up device supplying 1 to 4 A of current.
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 V
CC
pull-up device supplying 1 to 4 A of current.
Power Supply:
+5V supply input.
Ground
IP6
X
I
V
CC
GND
X
X
X
X
I
I
ABSOLUTE MAXIMUM RATINGS
1
SYMBOL
T
A
Operating ambient temperature range
2
T
STG
Storage temperature range
All voltages with respect to ground
3
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
o
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 range. See Ordering information table for applicable operating temperature range and V
CC
supply range.
PARAMETER
RATING
See Note 4
-65 to +150
-0.5 to +6.0
UNIT
°
C
°
C
V
DC ELECTRICAL CHARACTERISTICS
1, 2, 3
T
A
= -40
°
C to +85
°
C, V
CC
= +5.0V
10%
SYMBOL
PARAMETER
TEST CONDITIONS
LIMITS
Typ
UNIT
Min
Max
V
IL
V
IH
V
IH
V
IH
V
OL
V
OH
V
OH
I
IL
I
LL
I
X1L
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
Input leakage current
Data bus 3-stage leakage current
X1/CLK low input current
I
OL
= 2.4mA
I
OH
= -400
μ
A
I
OH
= -400
μ
A
V
IN
= 0 to V
CC
V
O
= 0.4 to V
CC
V
IN
= 0, X2 grounded
V
= 0, X2 floated
V
IN
= V
CC
, X2 grounded
V
IN
= V
CC
, X2 floated
V
IN
= 0, X1/CLK floated
V
IN
= V
CC
, X1/CLK floated
V
= 0.4 to V
0
°
C to +70
°
C version
-40
°
C to +85
°
C version
2
2.5
4
2.4
2.9
-10
-10
-4
-3
-1
0
-100
0
-10
0.8
0.4
V
V
V
V
V
V
V
μ
A
μ
A
mA
mA
mA
mA
μ
A
μ
A
μ
A
mA
mA
I
X1H
I
X2L
I
X2H
I
OC
I
OCC
X1/CLK high input current
X2 low input current
X2 high input current
Open-collector output leakage current
Power supply current
-2
-1.5
0.2
3.5
-30
+30
10
10
0
0
1
10
0
100
10
150
175
NOTES:
1. Parameters are valid over specified temperature range. See Ordering information table for applicable operating temperature range and V
CC
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. T
A
< 0
°
C
5. T
A
> 0
°
C
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