LTC1349CN 데이터 시트보기 (PDF) - Linear Technology
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LTC1349CN
Linear Technology
LTC1349CN Datasheet PDF : 8 Pages
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LTC1349
DC ELECTRICAL CHARACTERISTICS VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
Power Supply
VCC Supply Current
Supply Leakage Current (VCC)
On/Off Threshold Low
On/Off Threshold High
No Load (All Drivers VIN = VCC)(Note 2), 0 ≤ TA ≤ 70°C
q
No Load (All Drivers VIN = 0V)(Note 2), 0 ≤ TA ≤ 70°C
q
No Load (All Drivers VIN = VCC)(Note 2), – 40°C ≤ TA ≤ 85°C q
No Load (All Drivers VIN = 0V)(Note 2), – 40°C ≤ TA ≤ 85°C q
SHUTDOWN (Note 3)
q
0.3
0.8
0.5
1.0
0.3
1.0
0.5
1.5
35
50
q
1.4
0.8
q 2.0
1.4
UNITS
mA
mA
mA
mA
µA
V
V
AC CHARACTERISTICS VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
Slew Rate
Driver Propagation Delay
(TTL to RS232)
Receiver Propagation Delay
(RS232 to TTL)
RL = 3k, CL = 51pF
RL = 3k, CL = 2500pF
tHLD (Figure 1)
tLHD (Figure 1)
tHLR (Figure 2)
tLHR (Figure 2)
3
q
q
q
q
TYP MAX
8
30
5
2
3.5
2
3.5
0.3
0.8
0.2
0.8
UNITS
V/µs
V/µs
µs
µs
µs
µs
The q denotes specifications which apply over the operating temperature
range (0°C ≤ TA ≤ 70°Cfor commercial grade, – 40°C ≤ TA ≤ 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: Supply current is measured with driver and receiver outputs
unloaded.
Note 3: Supply current and leakage current measurements in SHUTDOWN
are performed with VON/OFF = 0V.
WU
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage
10
RL = 3k
8
OUTPUT HIGH
VCC = 5V
6
VCC = 4.5V
4
2
0
–2
–4
–6
–8
–40 –20
OUTPUT LOW
VCC = 4.5V
VCC = 5V
0 20 40 60
TEMPERATURE (°C)
80 100
LTC1349 • TPC01
Receiver Input Thresholds
2.2
2.0
1.8
VTH
1.6
VTL
1.4
1.2
1.0
–40 –20
0 20 40 60 80 100
TEMPERATURE (˚C)
LTC1349 • TPC02
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)
LTC1349 • TPC03
3
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