ST3232EBDR datasheet(6/20 Pages) STMICROELECTRONICS

6 / 20 page

Electrical characteristics

ST3232E

6/20

Note:

Transmitter Skew is measured at the transmitter zero cross points

Table 6.

Receiver (C1 - C4 = 0.1µF 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

VRIN

Receiver input voltage operating

range

-25

VRIL

RS-232 Input threshold low

TA = 25°C, VCC = 3.3V

0.6

1.1

TA = 25°C, VCC = 5V

0.8

1.5

VRIH

RS-232 Input threshold high

TA = 25°C, VCC = 3.3V

1.4

2.4

TA = 25°C, VCC = 5V

1.8

2.4

VRIHYS

Input hysteresis

0.5

RRIN

Input resistance

TA = 25°C

Ω

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 7.

Timing characteristics (C1 - C4 = 0.1µF 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

Data transfer rate

RL = 3KΩ, CL2= 1000pF

one transmitter switching

250

Kbps

tPHLR

tPLHR

Propagation delay input to

output

RXIN = RXOUT, CL = 150pF

0.15

µs

tOER

Receiver output enable time Normal Operation

tODR

Receiver output disable time Normal Operation

|tPHLT

- tTHL|

Transmitter propagation

delay difference

(

Note 1)

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

µs

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