ST3222EB datasheet(6/15 Pages) STMICROELECTRONICS

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Electrical characteristics

ST3222E

6/15

Table 9.

Receiver electrical characteristics (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)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

IOL

Output leakage current

R-OUT, EN = VCC, receiver disabled

± 0.05

± 10

µA

VRIN

Receiver input voltage

operating range

-25

VRIL

Input threshold low

TA = 25°C, VCC = 3.3 V

0.6

1.2

TA = 25°C, VCC = 5 V

0.8

1.5

VRIH

Input threshold high

TA = 25°C, VCC = 3.3 V

1.5

2.4

TA = 25°C, VCC = 5 V

1.8

2.4

VRIHYS

Input hysteresis

0.5

RRIN

Input resistance

TA = 25°C

VROL

Output voltage low

IOUT = 1.6 mA

0.4

VROH

Output voltage high

IOUT = -1 mA

VCC-0.6

VCC-

0.1

Table 10.

Timing characteristics (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)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Data transfer rate

RL = 3 KΩ, CL2= 1000 pF

one transmitter switching

250

Kbps

tPHLR

tPLHR

Propagation delay input to

output

RXIN to RXOUT, CL = 150 pF

0.15

µs

|tPHLT

- tTHL|

Transmitter propagation

delay difference (1)

200

tOER

Receiver output enable

time

Normal operation

tODR

Receiver output disable

time

Normal operation

|tPHLR

- tTHR|

Receiver propagation

delay difference

SRT

Transition slew rate

TA = 25°C RL = 3 KΩ to 7 KΩ

VCC = 3.3 V

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

CL = 150 pF to 1000 pF

630

V/µs

TA = 25°C RL = 3 KΩ to 7 KΩ

VCC = 3.3 V

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

CL = 150 pF to 2500 pF

430

V/µs

Transmitter Skew is measured at the transmitter zero cross points

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