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ST3237ECTR

±15KV ESD-PROTECTED, 1µA, 3 TO 5.5V, 250KBPS, RS-232 TRANSCEIVER WITH STAND-BY

STMicroelectronics 

ST3237E

ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS

Symbol

Parameter

ESD ESD Protection Voltage

ESD ESD Protection Voltage

Test Conditions

Human Body Model

IEC-1000-4-2 Contact Discharge

Min. Typ. Max. Unit

±15

kV

±8

kV

ELECTRICAL CHARACTERISTICS

(C1 - C4 = 0.1µF, 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

ISUPPLY VCC Power Supply Current SHDN=VCC

No Load

ISHDN Shutdown Supply Current SHDN=GND VT_IN=GND or VCC

0.3

1

mA

1

5

µA

LOGIC INPUT ELECTRICAL CHARACTERISTICS

(C1 - C4 = 0.1µF, 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

VTIL Input Logic Threshold Low T-IN, VHSCI, EN, SHDN

(Note 1)

0.8

V

VTIH Input Logic Threshold High T-IN, VHSCI, EN, SHDN VCC = 3.3V

2

V

VCC = 5V

2.4

IIL Input Leakage Current

T-IN, VHSCI, EN, SHDN

± 1.0 µA

VHYS Transmitter Input

Hysteresis

0.25

V

Note 1: Transmitter input hysteresis is typically 250mV

TRANSMITTER ELECTRICAL 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

VTOUT Output Voltage Swing

All Transmitter outputs are loaded with

± 5 ± 5.4

V

3KΩ to GND

RTOUT Transmitter Output

Resistance

VCC = 0V

VOUT = ± 2V

300 10M

Ω

ISC Output Short Circuit Current

± 60

mA

ITOL Output Leakage Current

VCC = 0V or 3.3V to 5.5V VOUT = ± 12V

Transmitters Disable

± 25 µA

4/13

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