MAX3140EEI datasheet(3/36 Pages) MAXIM

Part #	MAX3140EEI

Description	SPI/MICROWIRE-Compatible UART with Integrated True Fail-Safe RS-485/RS-422 Transceivers

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Manufacturer	MAXIM [Maxim Integrated Products]

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SPI/MICROWIRE-Compatible UART with Integrated

True Fail-Safe RS-485/RS-422 Transceivers

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +5V ±5%, DE = VCC, RE = GND, SHDN = VCC, fXTL = 1.8432MHz, TA = TMIN to TMAX, unless otherwise noted. Typical values

are measured with VCC = +5V, UART configured for 9600 baud, TA = +25°C.) (Note 1)

R = 50

Ω or R = 27Ω, Figure 1

R = 50

Ω or R = 27Ω, Figure 1 (Note 2)

R = 27

Ω (RS-422), Figure 1

R = 50

Ω (RS-422), Figure 1

No load, Figure 1

V IRQ = VCC

ISINK = 4mA

R = 50

Ω or R = 27Ω, Figure 1 (Note 2)

CONDITIONS

V

3

VOC

Common-Mode Output

Voltage

V

0.2

∆VOD

Change in Magnitude of

Differential Output Voltage

V

1.5

VOD2

Differential Output Voltage

2.0

5

VOD1

pF

5

COUT2

Output Capacitance

µA

±1

ILKG3

Output Leakage

V

0.4

VOL2

Output Low Voltage

V

0.2

∆VOC

Change In Magnitude of

Common-Mode Voltage

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

(Note 3)

H/F, TXP, RXP, internal pull-down

DE, DI, RE

SRL = VCC or unconnected

DE, Dl, RE, H/F, TXP, RXP

DE, Dl, RE

SRL = GND (Note 3)

SRL = VCC

V

0.4

· VCC

0.6

· VCC

VIM2

SRL Input Middle Voltage

V

VCC - 0.8

VIH2

SRL Input High Voltage

µA

10

40

IIN2

Input Current

±2

IIN1

mV

100

VHYS

DI Input Hysteresis

V

0.8

VIL1

Input Low Voltage

2.0

µA

-75

IIN3

SRL Input Current

75

V

0.8

VIL2

SRL Input Low Voltage

(Note 4)

DE = GND

VCC = GND or 5.25V

DE = GND

250

-250

µA

125

IO

Full-Duplex Output Leakage

(Y and Z)

µA

-75

IIN4

125

Full-Duplex Input Current

(A and B)

mA

±25

IOSD

Short-Circuit Output Current

-7V

≤ VCM ≤ +12V

mV

-200

-125

-50

VTH

mV

25

∆VTH

Input Hysteresis

Differential Threshold Voltage

ISINK = 4mA, VID = -200mV

ISOURCE = 4mA, VID = -50mV

0.4V

≤ VO ≤ 2.4V

V

0.4

VOL

V

VCC - 1.5

VOH

µA

±1

IOZR

Output High Voltage

Three-State Output Current

Output Low Voltage

-7V

≤ VCM ≤ 12V

0

≤ VRO ≤ VCC

k

Ω

96

RIN

mA

±7

±95

IOSR

Output Short-Circuit Current

Input Resistance

VIN = 12V

VIN = -7V

VCC = GND or 5.25V

VIN = 12V

VIN = -7V

-100

-7V

≤ VOUT ≤ VCC

0

≤ VOUT ≤ 12V

0

≤ VOUT ≤ VCC

H/F, TXP, RXP

V

2.4

VIH1

Input High Voltage

UART IRQ OUTPUT (Open Drain)

RS-485 DRIVER

RS-485 RECEIVER

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MAX3140EEI Datasheet(PDF) 3 Page - Maxim Integrated Products

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