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参数资料
型号： LT1780CN
厂商： LINEAR TECHNOLOGY CORP
元件分类： 通用总线功能
英文描述： Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????)
中文描述： LINE TRANSCEIVER, PDIP18
封装： PLASTIC, DIP-18
文件页数： 3/12页
文件大小： 276K
代理商： LT1780CN
3
LT1780/LT1781
ELECTRICAL C
HARA TERISTICS
(Note 2)
PARAMETER
Logic Input Current
Output Short-Circuit Current
Output Leakage Current
Data Rate
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
MIN
TYP
5
17
10
MAX
20
UNITS
G
μ
A
mA
μ
A
±
7
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)
0.8
1.3
1.7
0.4
5
1
0.2
4.2
–20
V
V
V
2.4
1
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
20
250
350
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).
The
G
denotes specifications which apply over the operating temperature
range.
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.
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