ST3232EC 查看數據表（PDF） - STMicroelectronics

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ST3232EC

±15kV ESD-Protection, 3 to 5.5V, low power, up to 250KBPS, RS-232 drivers and receivers

STMicroelectronics 

Electrical characteristics

ST3232E

Table 6.

Symbol

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)

Parameter

Test conditions

Min.

Typ. Max. Unit

VRIN

Receiver input voltage operating

range

-25

25

V

VRIL

VRIH

VRIHYS

RRIN

VROL

VROH

RS-232 Input threshold low

RS-232 Input threshold high

Input hysteresis

TA = 25°C, VCC = 3.3V

TA = 25°C, VCC = 5V

TA = 25°C, VCC = 3.3V

TA = 25°C, VCC = 5V

Input resistance

TA = 25°C

TTL/CMOS Output voltage low IOUT = 1.6mA

TTL/CMOS Output voltage high IOUT = -1mA

0.6

1.1

V

0.8

1.5

1.4

2.4

V

1.8

2.4

0.5

V

3

5

7

kΩ

0.4

V

VCC-0.6 VCC-0.1

V

Table 7.

Symbol

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)

Parameter

Test conditions

Min. Typ. Max. Unit

DR Data transfer rate

RL = 3KΩ, CL2= 1000pF

one transmitter switching

250

tPHLR Propagation delay input to

tPLHR output

RXIN = RXOUT, CL = 150pF

tOER Receiver output enable time Normal Operation

tODR Receiver output disable time Normal Operation

|tPHLT Transmitter propagation

- tTHL| delay difference

(Note 1)

|tPHLR Receiver propagation delay

- tTHR| 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

6

CL = 150pF to 2500pF

4

0.15

50

50

200

50

Kbps

µs

ns

ns

ns

ns

30 V/µs

30 V/µs

Note: 1 Transmitter Skew is measured at the transmitter zero cross points

6/20

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