LTC1334 LINER [Linear Technology], LTC1334 Datasheet - Page 4

• Manufacturer Part Number: LTC1334
• Description: Single 5V RS232/RS485 Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

LTC1334
AC ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
RS485 Mode (SEL1 = SEL2 = High)
t
t
t
t
t
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the
safety of the device cannot be guaranteed.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 3: All typicals are given at V
and T
TYPICAL PERFORMANCE CHARACTERISTICS
4
ZL
ZH
LZ
HZ
SKEW
PLH
PHL
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
A
–50
Receiver Output High Voltage
vs Temperature
= 25 C.
I
V
OUT
CC
–25
PARAMETER
Driver Enable to Output Low
Driver Enable to Output High
Driver Disable from Low
Driver Disable from High
Receiver Input to Output
Receiver Input to Output
Differential Receiver Skew, t
= 5V
= 3mA
0
TEMPERATURE ( C)
25
50
CC
75
= 5V, C1 = C2 = C3 = C4 = 0.1 F
W
LTC1334 • TPC01
100
PLH
U
125
– t
PHL
0.5
0.4
0.3
0.2
0.1
0
–50
A
Receiver Output Low Voltage
vs Temperature
= 25 C. V
I
V
CONDITIONS
Figures 3, 7, C
Figures 3, 7, C
Figures 3, 7, C
Figures 3, 7, C
Figures 2, 8, R
Figures 2, 8, R
Figures 2, 8, R
OUT
CC
–25
= 5V
= 3mA
0
TEMPERATURE ( C)
CC
The
= 5V, C1 = C2 = C3 = C4 = 0.1 F (Notes 2, 3)
25
L
L
L
L
L
L
L
= 100pF, S1 Closed
= 100pF, S2 Closed
= 15pF, S1 Closed
= 15pF, S2 Closed
Note 4: Short-circuit current for RS485 driver output low state folds back
above V
Note 5: The “B” RS232 receiver output is disabled in RS485 mode
(SEL1 = SEL2 = high). The unused output driver goes into a high
impedance mode and has a resistor to V
section for more details.
= 54 , C
= 54 , C
= 54 , C
denotes specifications which apply over the full operating
50
CC
75
L
L
L
. Peak current occurs around V
= 100pF
= 100pF
= 100pF
LTC1334 • TPC02
100
125
20
18
16
14
12
10
8
6
4
2
0
–50
RS485 Receiver Skew
t
PLH
MIN
V
20
20
CC
–25
CC
= 5V
O
– t
. See Applications Information
= 3V.
PHL
0
TEMPERATURE ( C)
TYP
10
50
50
50
60
60
70
25
vs Temperature
50
MAX
140
140
90
90
90
90
75
LTC1334 • TPC03
100
UNITS
ns
ns
ns
ns
ns
ns
ns
125