MAX253E(2010) 查看數據表（PDF） - Maxim Integrated

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MAX253E
(Rev.:2010)

Transformer Driver for Isolated RS-485 Interface

Maxim Integrated 

Transformer Driver for

Isolated RS-485 Interface

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC) ...............................................-0.3V to +7V

Control Input Voltages (SD, FS) .................-0.3V to (VCC + 0.3V)

Output Switch Voltage (D1, D2) .............................................12V

Peak Output Switch Current (D1, D2) ......................................1A

Average Output Switch Current (D1, D2) .........................200mA

Continuous Power Dissipation (TA = +70°C)

Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW

SO (derate 5.88mW/°C above +70°C) ..........................471mW

µMAX (derate 4.10mW/°C above +70°C) .....................330mW

CERDIP (derate 8.00mW/°C above +70°C) ..................640mW

Operating Temperature Ranges

MAX253C_ _ ........................................................0°C to +70°C

MAX253E_ _ .....................................................-40°C to +85°C

MAX253MJA ...................................................-55°C to +125°C

Junction Temperatures

MAX253C_ _/E_ _..........................................................+150°C

MAX253MJA .................................................................+175°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow)

PDIP, SO, µMAX lead(Pb)-free .....................................+260°C

PDIP, SO, µMAX, CERDIP containing lead(Pb) ............+240°C

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.

ELECTRICAL CHARACTERISTICS

(VCC = 5V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

Switch On-Resistance

Switch Frequency

Operating Supply Current (Note 1)

Shutdown Supply Current (Note 2)

Shutdown Input Threshold

Shutdown Input Leakage Current

FS Input Threshold

FS Input Leakage Current

Start-Up Voltage

CONDITIONS

D1, D2; 100mA

FS = VCC or open

VFS = 0V

No load, VSD = 0V, FS low

SD = VCC

High

Low

High

Low

VFS = 0V

FS = VCC

MIN TYP

1.5

250

350

150

200

0.45

0.4

2.4

10

2.4

10

2.5

2.2

Note 1: Operating supply current is the current used by the MAX253 only, not including load current.

Note 2: Shutdown supply current includes output switch-leakage currents.

MAX

4.0

500

300

5.0

0.8

0.8

50

UNITS

Ω

kHz

mA

µA

V

µA

pA

V

µA

pA

V

2 _______________________________________________________________________________________

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