ST3237E_06 datasheet(6/17 Pages) STMICROELECTRONICS | ± 15KV ESD-protected, 1μA, 3 to 5.5V, 250Kbps RS-232 Transceiver with stand-by

6 page

Electrical characteristics

ST3237E

6/17

Electrical characteristics

Note:

Transmitter input hysteresis is typically 250mV

Table 4.

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

0.3

ISHDN

Shutdown Supply Current

SHDN=GND, VT_IN=GND or VCC

µA

Table 5.

Logic input (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

(Note 1)

T-IN, VHSCI, EN, SHDN

0.8

VTIH

Input Logic Threshold

High

T-IN, VHSCI, EN, SHDN

VCC = 3.3V

VCC = 5V

2.4

IIL

Input Leakage Current

T-IN, VHSCI, EN, SHDN

± 1.0

µA

VHYS

Transmitter Input

Hysteresis

0.25

Table 6.

Transmitter (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

Ω to GND

± 5

± 5.4

RTOUT

Transmitter output

resistance

VCC = 0V, VOUT = ± 2V

300

10M

ISC

Output short circuit current

± 60

ITOL

Output leakage current

VCC = 0V or 3.3V to 5.5V

VOUT = ± 12V

Transmitters disable

± 25

µA

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