LTC1349_15 Datasheet, PDF (3/8 Pages) Linear Technology – 5V Low Power RS232 3-Driver/5-Receiver Transceiver with 2 Receivers Active in Shutdown

LTC1349
DC ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range. V_CC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless noted.
PARAMETER
Power Supply
V_CC Supply Current
Supply Leakage Current (V_CC)
On/Off Threshold Low
On/Off Threshold High
CONDITIONS
No Load (All Drivers V_IN = V_CC)(Note 2), 0°C ≤ T_A ≤ 70°C
No Load (All Drivers V_IN = 0V)(Note 2), 0°C ≤ T_A ≤ 70°C
No Load (All Drivers V_IN = V_CC)(Note 2), 0°C ≤ T_A ≤ 85°C
No Load (All Drivers V_IN = V_CC)(Note 2), – 40°C ≤ T_A ≤ 0°C
No Load (All Drivers V_IN = 0V)(Note 2), – 40°C ≤ T_A ≤ 85°C
Shutdown (Note 3)
MIN TYP MAX
●
0.3
0.8
●
0.5
1.0
●
0.3
1.0
●
0.3
1.5
●
0.5
1.5
●
35
50
●
1.4
0.8
● 2.0
1.4
UNITS
mA
mA
mA
mA
mA
µA
V
V
AC CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range.
V_CC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless noted.
PARAMETER
Slew Rate
Driver Propagation Delay
(TTL to RS232)
Receiver Propagation Delay
(RS232 to TTL)
CONDITIONS
R_L = 3k, C_L = 51pF
R_L = 3k, C_L = 2500pF
t_HLD (Figure 1)
t_LHD (Figure 1)
t_HLR (Figure 2)
t_LHR (Figure 2)
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.
MIN TYP MAX
8
30
3
5
●
2
3.5
●
2
3.5
●
0.3
0.8
●
0.2
0.8
UNITS
V/µs
V/µs
µs
µs
µs
µs
Note 3: Supply current and leakage current measurements in Shutdown
are performed with V_ON/OFF = 0V.
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage
10
R_L = 3k
8
6
4
OUTPUT HIGH
V_CC = 5V
V_CC = 4.5V
2
0
–2
–4
–6
–8
–40 –20
OUTPUT LOW
V_CC = 4.5V
V_CC = 5V
0 20 40 60 80 100
TEMPERATURE (°C)
LTC1349 • TPC01
Receiver Input Thresholds
2.2
2.0
1.8
V_TH
1.6
V_TL
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
V_CC = 5V
R_L = 3k
35
C_L = 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
1349fa
3