Datasheet

3
LTC1348
E
LECTR
IC
AL C CHARA TERIST
ICSCD
V
CC
= 3V to 5.5V, C1 to C4 = 0.1µF, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply Generator
V
+
Output Voltage I
OUT
= 0mA 8.0 V
I
OUT
= 8mA 7.5 V
V
–
Output Voltage I
OUT
= 0mA –8.0 V
I
OUT
= –8mA –7.0 V
Supply Rise Time Shutdown to Turn-On 0.2 ms
Power Supply
V
CC
Supply Current No Load (Note 2) V
CC
= 3.3V ● 0.6 2.0 mA
No Load (Note 2) V
CC
= 5V ● 0.8 2.5 mA
Receiver Alive Mode (Note 4) V
CC
= 3.3V or 5V ● 15 30 µA
Supply Leakage Current (V
CC
) Shutdown (Note 3) ● 0.2 10 µA
Driver/Receiver Enable Threshold Low ● 0.8 V
Driver/Receiver Enable Threshold High V
CC
= 3.3V ● 2.0 V
Driver/Receiver Enable Threshold High V
CC
= 5V ● 2.4 V
AC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Data Rate R
L
= 3k, C
L
= 1000pF, One Driver Switching 120 250 kbps
Slew Rate V
CC
= 5V, R
L
= 3k, C
L
= 51pF 8 30 V/µs
V
CC
= 3.3V, R
L
= 3k, C
L
= 2500pF 3 V/µs
Driver Propagation Delay t
HLD
(Figure 1) ● 2.5 4 µs
(TTL to RS232) t
LHD
(Figure 1) ● 2.5 4 µs
Receiver Propagation Delay t
HLR
(Figure 2) (Normal Mode) ● 0.3 1 µs
(RS232 to TTL) t
LHR
(Figure 2) (Normal Mode) ● 0.2 1 µs
t
HLR
(Figure 2) (Receiver Alive Mode) ● 1.0 4 µs
t
LHR
(Figure 2) (Receiver Alive Mode) ● 0.2 4 µs
Note 3: Supply current measurement in Shutdown is performed with
V
DREN
and V
RXEN
= 0V.
Note 4: Supply current measurement in Receiver Alive mode is performed
with V
DREN
= 0V and V
RXEN
= V
CC
.
V
CC
= 3V to 5.5V, C1 to C4 = 0.1µF, unless otherwise noted.
The ● denotes specifications which apply over the full operating
temperature range (0°C ≤ T
A
≤ 70°C for Commercial grade and
–40°C ≤ T
A
≤ 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. The V
DREN
and V
RXEN
= V
CC
.