ST3243EB datasheet(9/16 Pages) STMICROELECTRONICS

9 / 16 page

ST3243EB, ST3243EC

Electrical characteristics

Doc ID 8648 Rev 12

9/16

C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified.

Typical values are referred to TA = 25 °C.

C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified.

Typical values are referred to TA = 25 °C.

Table 11.

Receiver electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VRIN

Receiver input voltage

operating range

-25

VRIL

RS-232 Input threshold

low

TA = 25°C, VCC = 3.3 V

TA = 25°C, VCC = 5.0 V

0.6

0.8

1.1

1.4

VRIH

RS-232 Input threshold

high

TA = 25°C, VCC = 3.3 V

TA = 25°C, VCC = 5.0 V

1.6

1.9

2.4

VRIHYS

Input hysteresis

0.5

RRIN

Input resistance

TA = 25°C

Table 12.

Timing characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Maximum data rate

RL = 3kΩ, CL= 1000 pF one transmitter

switching

250

400

kbps

tPHL

tPLH

Receiver propagation

delay

RIN to ROUT, CL = 150 pF

0.15

µs

tT_SKEW

Transmitter skew

150

tR_SKEW

Receiver skew

SRT

Transition slew rate

TA = 25°C RL = 3k to 7kΩ, VCC = 3.3 V

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

CL = 150 pF to 1000 pF

CL = 150 pF to 2500 pF

V/µs

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