ST3243EBTR datasheet(8/16 Pages) STMICROELECTRONICS

Part #	ST3243EBTR

Description	(,-) 15 kV ESD protected 3 to 5.5 V, 400 kbps, RS-232 transceiver with auto power-down

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Electrical characteristics

ST3243EB, ST3243EC

8/16

Doc ID 8648 Rev 12

C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified.

Typical values are referred to TA = 25 °C, FORCEON = GND, FORCEOFF = VCC.

C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified.

Typical values are referred to TA = 25 °C.

Table 9.

Auto power-down electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VRITE

Receiver input threshold

to INVALID output voltage

HIGH (see Figure 3)

Positive threshold

2.7

V

Negative threshold

2.7

V

VRITD

Receiver input threshold

to INVALID output voltage

LOW (see Figure 3)

-0.3

0.3

V

VIOL

INVALID output voltage

LOW

IOUT = 1.6 mA

0.4

V

VIOH

INVALID output voltage

HIGH

IOUT = -1 mA

VCC-0.6

V

tWU

Receiver or transmitter

edge transmitter enabled

(see Figure 3)

100

µs

tINVH

Receiver positive or

negative threshold to

INVALID HIGH

(see Figure 3)

0.2

µs

tINVL

Receiver positive or

negative threshold to

INVALID LOW

(see Figure 3)

30

µs

Table 10.

Transmitter electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VTOUT

Output voltage swing

All Transmitter outputs are loaded with

3k

Ω to GND

± 5

± 5.4

V

ROUT

Output resistance

VCC = V+ = V- = 0 V, VOUT = ± 2 V

300

10M

Ω

ISC

Output short circuit

current

VCC = 3.3 V

± 40

± 60

mA

IL

Output leakage current

VCC = 0 to 5.5V, transmitter output =

±12 V, transmitter disabled

± 25

µA

VOT

Transmitter output voltage

T1IN = T2IN = GND,T3IN = VCC

T3OUT loaded with 3 k

Ω to GND

T1OUT and T2OUT loaded with 2.5mA

each

± 5V

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