LTC1337C Просмотр технического описания (PDF) - Linear Technology
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LTC1337C Datasheet PDF : 8 Pages
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LTC1337
DC ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
Power Supply Generator
V+ Output Voltage
V– Output Voltage
Supply Rise Time
Power Supply
VCC Supply Current
Supply Leakage Current (VCC)
On/Off Threshold Low
On/Off Threshold High
CONDITIONS
IOUT = 0mA
IOUT = 12mA
IOUT = 0mA
IOUT = 12mA
Shutdown to Turn-On
No Load (Note 2)
Shutdown (Note 3)
MIN TYP MAX
8.0
7.5
– 8.0
– 6.5
0.2
●
0.3
0.5
●
1
10
●
1.4
0.8
● 2.0
1.4
UNITS
V
V
V
V
ms
mA
µA
V
V
AC CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range.
VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
Slew Rate
Driver Propagation Delay
(TTL to RS232)
Receiver Propagation Delay
(RS232 to TTL)
CONDITIONS
RL = 3k, CL = 51pF
RL = 3k, CL = 2500pF
tHLD (Figure 1)
tLHD (Figure 1)
tHLR (Figure 2)
tLHR (Figure 2)
MIN TYP MAX
8
30
2
4
●
2
3
●
2
3
●
0.3
0.6
●
0.2
0.6
UNITS
V/µs
V/µs
µs
µs
µs
µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Supply current is measured with driver and receiver outputs
unloaded and driver inputs tied high.
Note 3: Supply current and leakage measurements in Shutdown are
performed with VON = 0V.
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage
10
RL = 3k
8
6
4
OUTPUT HIGH
VCC = 5V
VCC = 4.5V
2
0
–2
OUTPUT LOW
–4
VCC = 4.5V
–6
VCC = 5V
–8
0 10 20 30 40 50 60 70
TEMPERATURE (°C)
1337 G01
Receiver Input Thresholds
2.0
1.9
1.8
INPUT HIGH
1.7
1.6
1.5
INPUT LOW
1.4
1.3
1.2
1.1
0
10 20 30 40 50
TEMPERATURE (°C)
60 70
1337 G02
Supply Current vs Data Rate
45
40
VCC = 5V
RL = 3k
35
CL = 2500pF
3 DRIVERS ACTIVE
30
25
20
15
10
5
0
0 25 50 75 100 125 150 175
DATA RATE (k BAUD)
1337 G03
1337fa
3
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