LTC1347 Datasheet, PDF (3/8 Pages) Linear Technology – 5V Low Power RS232 3-Driver/5-Receiver Transceiver with 5 Receivers Active in Shutdown

LTC1347
DC ELECTRICAL CHARACTERISTICS V_CC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
Power Supply Generator
V⁺ Output Voltage
V^– Output Voltage
Supply Rise Time
CONDITIONS
I_OUT = 0mA
I_OUT = 12mA
I_OUT = 0mA
I_OUT = – 12mA
Shutdown to Turn-On
MIN TYP MAX
8.0
7.5
– 8.0
– 7.0
0.2
UNITS
V
V
V
V
ms
Power Supply
V_CC Supply Current
On/Off Threshold Low
On/Off Threshold High
No Load (All Drivers V_IN = 5V)(Note 2)
No Load (All Drivers V_IN = 0V) (Note 2)
Shutdown (Note 3)
q
0.6
1.1
mA
q
0.8
1.3
mA
q
80.0 120.0
µA
q
1.4
0.8
V
q 2.0
1.4
V
AC CHARACTERISTICS V_CC = 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
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)
MIN TYP MAX
8
30
3
5
q
2
3.5
q
2
3.5
q
0.3
0.8
q
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 ≤ T_A ≤ 70°C for commercial 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 V_ON/OFF = 0V.
TYPICAL PERFORMANCE CHARACTERISTICS
Driver Output Voltage
10
R_L = 3k
8
OUTPUT HIGH
V_CC = 5V
6
V_CC = 4.5V
4
2
0
–2
–4
–6
–8
–40 –20
OUTPUT LOW
V_CC = 4.5V
V_CC = 5V
0 20 40 60
TEMPERATURE (°C)
80 100
1347 G01
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
TEMPERATURE (˚C)
80 100
1347 G02
Supply Current vs Data Rate
45
40
V_CC = 5V
R_L = 3k
35 ^{CL = 2500pF}
3 DRIVERS ACTIVE
30
25
20
15
10
5
0
0 25 50 75 100 125 150 175
DATA RATE (kBAUD)
1347 G03
3