參數(shù)資料
型號(hào)： LT1280A
廠商： Linear Technology Corporation
元件分類(lèi)： 外設(shè)及接口
英文描述： Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述： 單電源RS232C接口線(xiàn)路驅(qū)動(dòng)器/接收器（單電源RS232C接口線(xiàn)收發(fā)器（2發(fā)2收））
文件頁(yè)數(shù)： 3/8頁(yè)
文件大?。?/td> 222K
代理商： LT1280A
3
LT1280A/LT1281A
Driver Output Voltage
TEMPERATURE (°C)
–55
–10
D
–8
–4
–2
0
10
4
0
50
75
LT1280A TPC03
–6
6
8
2
–25
25
100
125
OUTPUT HIGH
OUTPUT LOW
V
CC
= 4.5V
V
CC
= 5V
V
CC
= 5.5V
R
L
= 3k
V
CC
= 5V
V
CC
= 4.5V
V
CC
= 5.5V
C
HARA TERISTICS
Driver Minimum Output Voltage
vs Load Capacitance
–4.0
U
A
TYPICAL PERFOR
Driver Maximum Output Voltage
vs Load Capacitance
8.0
CE
ELECTRICAL C
PARAMETER
Logic Input Current
Output Short-Circuit Current
Output Leakage Current
Data Rate (Note 7)
CONDITIONS
0.8V
≤
V
IN
≤
2.0V
V
OUT
= 0V
Shutdown V
OUT
=
±
30V (Note 4)
R
L
= 3k, C
L
= 2500pF
R
L
= 3k, C
L
= 1000pF
R
L
= 3k, C
L
= 51pF
R
L
= 3k, C
L
= 2500pF
Output Transition t
HL
High-to-Low (Note 5)
Output Transition t
LH
Low-to-High
HARA TERISTICS
(Note 2)
MIN
TYP
5
17
10
MAX
20
UNITS
G
μ
A
mA
μ
A
±
9
G
100
120
250
kBaud
kBaud
V/
μ
s
V/
μ
s
Slew Rate
15
7
0.6
0.5
30
4
Propagation Delay
1.3
1.3
μ
s
μ
s
Receiver
Input Voltage Thresholds
Input Low Threshold (V
OUT
= High)
Input High Threshold (V
OUT
= Low)
Input Low
Input High
C Grade
C Grade
I Grade
I Grade
G
G
0.8
1.3
1.7
1.3
1.7
0.4
5
1
0.2
4.2
–20
20
250
350
V
V
V
V
V
2.4
G
G
0.2
3.0
1.0
7
10
0.4
Hysteresis
Input Resistance
Output Leakage Current
Output Voltage
G
0.1
3
V
IN
=
±
10V
Shutdown (Note 4) 0
≤
V
OUT
≤
V
CC
Output Low, I
OUT
= –1.6mA
Output High, I
OUT
= 160
μ
A (V
CC
= 5V)
Sinking Current, V
OUT
= V
CC
Sourcing Current, V
OUT
= 0V
Output Transition t
HL
High-to-Low (Note 6)
Output Transition t
LH
Low-to-High
k
μ
A
G
G
G
V
V
3.5
Output Short-Circuit Current
–10
mA
mA
ns
ns
10
Propagation Delay
600
600
Note 4:
Supply current measurements in shutdown are performed with
V
ON/OFF
≤
0.1V.
Note 5:
For driver delay measurements, R
L
= 3k and C
L
= 51pF. Trigger
points are set between the driver’s input logic threshold and the output
transition to the zero crossing (t
HL
= 1.4V to 0V and t
LH
= 1.4V to 0V).
Note 6:
For receiver delay measurements, C
L
= 51pF. Trigger points are
set between the receiver’s input logic threshold and the output transition
to standard TTL/CMOS logic threshold (t
HL
= 1.3V to 2.4V and t
LH
= 1.7V
to 0.8V).
Note 7:
Data rate operation guaranteed by slew rate, short-circuit current
and propagation delay tests.
The
G
denotes specifications which apply over the operating temperature
range (0
°
C
≤
T
A
≤
70
°
C for commercial grade, and –40
°
C
≤
T
A
≤
85
°
C for
industrial grade.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2:
Testing done at V
CC
= 5V and V
ON/OFF
= 3V, unless otherwise
specified.
Note 3:
Supply current is measured as the average over several charge
pump cycles. C
+
= C
–
= C1 = C2 = 0.1
μ
F. All outputs are open, with all
driver inputs tied high.
LOAD CAPACITANCE (nF)
0
5.0
P
5.5
6.0
6.5
7.0
7.5
2
4
6
8
LT1280A TPC01
10
1
3
5
7
9
20k BAUD
60k BAUD
120k BAUD
LOAD CAPACITANCE (nF)
0
–7.0
P
–6.5
–6.0
–5.5
–5.0
–4.5
2
4
6
8
LT1280A TPC02
10
1
3
5
7
9
120k BAUD
60k BAUD
20k BAUD
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