TL145406

TRIPLE RS-232 DRIVERS/RECEIVERS

SLLS185D – DECEMBER 1994 – REVISED JULY 2001

9

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

Figure 11

TA – Free-Air Temperature – °C

RECEIVER

INPUT THRESHOLD VOLTAGE

vs

FREE-AIR TEMPERATURE

VIT–

VIT+

2.4

2.2

2

1.8

1.6

1.4

1.2

0.6

0.4

1

0.8

0

1020

30

4050

60

70

Figure 12

RECEIVER

INPUT THRESHOLD VOLTAGE

vs

SUPPLY VOLTAGE

VCC – Supply Voltage – V

VIT–

VIT+

2

1.8

1.6

1.4

1.2

1

0.8

0.2

0

0.6

0.4

23

45

67

89

10

NOTE A: This

figure

shows

the

maximum

amplitude

of

a

positive-going pulse that, starting from 0, does not cause a

change of the output level.

Figure 13

RECEIVER

NOISE REJECTION

tw – Pulse Duration – ns

6

5

4

3

2

1

0

0

40

100

400

1000

4000 10000

CC = 300 pF

VCC = 5 V

TA = 25°C

See Note A

CC = 500 pF

CC = 12 pF

CC = 100 pF

Figure 14

RECEIVER

MAXIMUM SUPPLY VOLTAGE

vs

FREE-AIR TEMPERATURE

TA – Free-Air Temperature – °C

RL ≥ 3 kΩ (from each output to GND)

0

10

2030

4050

6070

16

14

10

8

6

0

4

2

12