4

LTC1334

AC ELECTRICAL CHARACTERISTICS

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 4: Short-circuit current for RS485 driver output low state folds back

Note 5: The “B” RS232 receiver output is disabled in RS485 mode

(SEL1 = SEL2 = high). The unused output driver goes into a high

section for more details.

Receiver Output High Voltage

vs Temperature

TEMPERATURE (

°C)

–50

5.0

4.9

4.8

4.7

4.6

4.5

4.4

4.3

4.2

4.1

4.0

0

50

75

LTC1334 • TPC01

–25

25

100

125

TEMPERATURE (

°C)

–50

20

18

16

14

12

10

8

6

4

2

0

0

50

75

LTC1334 • TPC03

–25

25

100

125

RS485 Receiver Skew

TEMPERATURE (

°C)

–50

0.5

0.4

0.3

0.2

0.1

0

0

50

75

LTC1334 • TPC02

–25

25

100

125

Receiver Output Low Voltage

vs Temperature

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RS485 Mode (SEL1 = SEL2 = High)

Driver Enable to Output Low

q

50

90

ns

Driver Enable to Output High

q

50

90

ns

Driver Disable from Low

q

50

90

ns

Driver Disable from High

q

60

90

ns

Receiver Input to Output

q

20

60

140

ns

Receiver Input to Output

q

20

70

140

ns

Differential Receiver Skew,

10

ns