ST3222C datasheet(6/13 Pages) STMICROELECTRONICS

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Electrical characteristics

ST3222B - ST3222C

6/13

3.1

Receiver electrical characteristics

Table 7.

Receiver electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 3.6 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 = 3.3V

0.6

1.2

VRIH

Input threshold high

TA = 25°C, VCC = 3.3V

1.5

2.4

VRIHYS

Input hysteresis

0.5

RRIN

Input resistance

TA = 25°C

VROL

TTL/CMOS output voltage

low

IOUT = 1.6mA

0.4

VROH

TTL/CMOS output voltage

high

IOUT = -1mA

VCC-0.6

VCC-

0.1

Table 8.

Timing characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 3.6 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= 1000pF

one transmitter switching

240

400

Kbps

tPHLR

tPLHR

Propagation delay input to

output

RXIN to RXOUT, CL = 150pF

0.2

µs

|tPHLT

- tTHL|

Transmitter propagation

delay difference (1)

100

tOER

Receiver output enable

time

Normal operation

200

tODR

Receiver output disable

time

Normal operation

200

|tPHLR

- tTHR|

Receiver propagation

delay difference

SRT

Transition slew rate

TA = 25°C, RL = 3kΩ to 7kΩ,

VCC = 3.3V

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

+3V

CL = 150pF to 1000pF

CL = 150pF to 2500pF

V/µs

Transmitter skew is measured at the transmitter zero cross points

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