Datasheet

3
LTC1338
V
CC
= 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
E
LECTR
IC
AL C CHARA TERIST
ICSCD
CCHARA TERIST
ICS
AC
Note 3: Supply current and leakage current measurements in SHUTDOWN
are performed with V
DRIVER ENABLE
and V
RECEIVER ENABLE
= 0V.
Note 4: Supply current measurement in RECEIVER ALIVE mode is
performed with V
DRIVER ENABLE
= 0V and V
RECEIVER ENABLE
= V
CC
.
The
● denotes specifications which apply over the operating temperature
range of 0°C to 70°C or –40°C to 85°C.
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. The V
DRIVER ENABLE
and V
RECEIVER ENABLE
= V
CC
.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Slew Rate R
L
= 3k, C
L
= 51pF 8 30 V/µs
R
L
= 3k, C
L
= 2500pF 3 5 V/µs
Driver Propagation Delay t
HLD
(Figure 1) ● 2 3.5 µs
(TTL to RS232) t
LHD
(Figure 1) ● 2 3.5 µs
Receiver Propagation Delay t
HLR
(Figure 2) ● 0.3 0.8 µs
(RS232 to TTL) t
LHR
(Figure 2) ● 0.2 0.8 µs
V
CC
= 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
TYPICAL PERFOR A CE CHARACTERISTICS
WU
DATA RATE (k BAUD)
0
SUPPLY CURRENT (mA)
40
50
60
60 100
LTC1338 • TPC03
30
20
20 40
80 120 140
10
0
V
CC
= 5V
R
L
= 3k
C
L
= 2500pF
5 DRIVERS ACTIVE
TEMPERATURE (˚C)
–40
THRESHOLD VOLTAGE (V)
1.8
2.0
2.2
20 60
LTC1338 • TPC02
1.6
1.4
–20 0
40 80 100
1.2
1.0
V
TH
V
TL
TEMPERATURE (°C)
–40
–8
DRIVER OUTPUT VOLTAGE (V)
–6
–2
0
2
40
10
LTC1338 • TPC01
–4
080
4
6
8
–20
60
20 100
R
L
= 3k
OUTPUT HIGH
V
CC
= 5V
V
CC
= 4.5V
OUTPUT LOW
V
CC
= 4.5V
V
CC
= 5V
Driver Output Voltage Receiver Input Thresholds Supply Current vs Data Rate
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
CC
Supply Current No Load (All Driver V
IN
= V
CC
)(Note 2) 0°C ≤ T
A
≤ 70°C 0.5 1.0 mA
No Load (All Driver V
IN
= 0V)(Note 2) 0°C ≤ T
A
≤ 70°C 1.0 1.5 mA
No Load (All Driver V
IN
= V
CC
)(Note 2) –40°C ≤ T
A
≤ 85°C 0.5 1.5 mA
No Load (All Driver V
IN
= 0V)(Note 2) –40°C ≤ T
A
≤ 85°C 1.0 2.0 mA
RECEIVER ALIVE Mode (Note 4) ● 50 80 µA
Supply Leakage Current (V
CC
) SHUTDOWN (Note 3) ● 0.2 10 µA
Driver/Receiver Enable Threshold Low ● 1.4 0.8 V
Driver/Receiver Enable Threshold High ● 2.0 1.4 V