MAX14840E datasheet(2/15 Pages) MAXIM

2 / 15 page

2 ______________________________________________________________________________________

40Mbps, +3.3V, RS-485 Half-Duplex

Transceivers

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

(Voltages referenced to GND.)

VCC ..................................................................... -0.3V to +6.0V

RE, RO .................................................. -0.3V to +(VCC + 0.3V)

DE, DI .................................................................. -0.3V to +6.0V

A, B.................................................................... -8.0V to +13.0V

Short-Circuit Duration (RO, A, B) to GND ............... Continuous

Continuous Power Dissipation (TA = +70NC)

8-Pin SO (derate 7.6mW/NC above +70NC) ............... 606mW

8-Pin TDFN (derate 24.4mW/NC above +70NC) ....... 1951mW

Junction-to-Case Thermal Resistance (BJC) (Note 1)

8-Pin SO.......................................................................38NC/W

8-Pin TDFN ....................................................................8NC/W

Junction-to-Ambient Thermal Resistance (BJA) (Note 1)

8-Pin SO ....................................................................132NC/W

8-Pin TDFN ..................................................................41NC/W

Operating Temperature Range ...................... -40NC to +125NC

Junction Temperature .................................................. +150NC

Storage Temperature Range ......................... -65NC to +150NC

Lead Temperature (soldering, 10s) ...............................+300NC

Soldering Temperature (reflow) ......................................+260NC

DC ELECTRICAL CHARACTERISTICS

(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 2, 3)

ABSOLUTE MAXIMUM RATINGS

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

POWER SUPPLY

Supply Voltage

VCC

3.0

3.6

Supply Current

ICC

DE = RE = VCC, or

DE = RE = GND, or

DE = VCC, RE = GND,

DI = VCC or GND, no load

1.5

Shutdown Supply Current

ISH

DE = GND and RE = VCC

DRIVER

Differential Driver Output

VOD

RL = 54I, Figure 1

1.5

Change in Magnitude of

Differential Output Voltage

VOD

RL = 54I, Figure 1 (Note 4)

-0.2

+0.2

Driver Common-Mode Output

Voltage

VOC

RL = 54I, Figure 1

VCC/2

Change in Common-Mode

Voltage

VOC

RL = 54I, Figure 1 (Note 4)

-0.2

0.2

Single-Ended Driver Output High

VOH

A/B output, IOUT = -20mA

2.2

Single-Ended Driver Output Low

VOL

A/B output, IOUT = 20mA

0.8

Driver Short-Circuit Output

Current

|IOSD|

0V P VOUT P +12V, output low

250

-7V P VOUT P VCC, output high

250

RECEIVER

Input Current (A and B)

IA,B

DE = GND,

VCC = GND or +3.6V

VIN = +12V

1000

VIN = -7V

-800

Differential Input Capacitance

CA,B

Between A and B, DE = GND, f = 2MHz

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