ST3237

Electrical characteristics

7/15

Note:

Transmitter Skew is measured at the transmitter zero cross points

Table 6.

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Receiver input voltage

operating range

-25

25

V

RS-232 input threshold

low

0.6

0.8

1.2

1.5

V

V

RS-232 input threshold

high

1.5

1.8

2.4

2.4

V

V

Input hysteresis

0.3

V

Input resistance

3

5

7

K

Ω

Table 7.

Timing characteristics (C1 - C4 = 0.1mF tested at 3.3V±10%, VCC = 3V to 5.5V, TA = -40

to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Maximum data rate

one transmitter switching, VHSCI=GND

250

Kbps

1000

Kbps

Propagation delay input to

output

0.15

µs

Transmitter skew

100

ns

60

ns

Receiver skew

ns

Receiver output enable

time

Normal operation

80

ns

Receiver output disable

time

Normal operation

130

ns

Transition slew rate

3.3V

measured from +3V to -3V or -3V to +3V

6

24

4

30

150

30

V/

µs

V/

µs

V/

µs