MAX3490E 查看數據表（PDF） - Maxim Integrated

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MAX3490E

3.3V-Powered, ±15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS- 485/RS-422 Transceivers

Maxim Integrated 

3.3V-Powered, ±15kV ESD-Protected, 12Mbps and

Slew-Rate-Limited True RS-485/RS-422 Transceivers

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC).............................................................+7V

Control Input Voltage (RE, DE).................................-0.3V to +7V

Driver Input Voltage (DI)...........................................-0.3V to +7V

Driver Output Voltage (A, B, Y, Z) .......................-7.5V to +12.5V

Receiver Input Voltage (A, B)..............................-7.5V to +12.5V

Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V)

Continuous Power Dissipation (TA = +70°C)

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

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

14-Pin SO (derate 8.33mW/°C above +70°C)................667mW

14-Pin Plastic DIP (derate 10mW/°C above +70°C) ......800mW

Operating Temperature Ranges

MAX34_ _ EC_ _ ...................................................0°C to +70°C

MAX34_ _ EE_ _.................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10sec) .............................+300°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.

DC ELECTRICAL CHARACTERISTICS

(VCC = +3.3V ±0.3V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

RL = 100Ω (RS-422), Figure 4

2.0

Differential Driver Output

VOD RL = 54Ω (RS-485), Figure 4

1.5

V

RL = 60Ω (RS-485), VCC = 3.3V, Figure 5

1.5

Change in Magnitude of Driver

Differential Output Voltage for

Complementary Output States

(Note 1)

∆VOD RL = 54Ω or 100Ω, Figure 4

0.2

V

Driver Common-Mode Output

Voltage

VOC RL = 54Ω or 100Ω, Figure 4

3

V

Change in Magnitude of

Common-Mode Output Voltage

(Note 1)

∆VOC RL = 54Ω or 100Ω, Figure 4

0.2

V

Input High Voltage

Input Low Voltage

Logic Input Current

Input Current (A, B)

Output Leakage (Y, Z)

Output Leakage (Y, Z)

in Shutdown Mode

Receiver Differential

Threshold Voltage

VIH DE, DI, RE

2.0

VIL DE, DI, RE

IIN1 DE, DI, RE

IIN2

DE = 0,

VCC = 0 or 3.6V

VIN = 12V

VIN = -7V

IO

DE = 0, RE = 0,

VOUT = 12V

VCC = 0 or 3.6V, MAX3491E VOUT = -7V

IO

DE = 0, RE = VCC,

VOUT = 12V

VCC = 0 or 3.6V, MAX3491E VOUT = -7V

VTH -7V ≤ VCM ≤ 12V

-0.2

V

0.8

V

±2

µA

1.0

mA

-0.8

20

µA

-20

1

µA

-1

0.2

V

Receiver Input Hysteresis

Receiver Output High Voltage

Receiver Output Low Voltage

∆VTH

VOH

VOL

VCM = 0

IOUT = -1.5mA, VID = 200mV, Figure 6

IOUT = 2.5mA, VID = 200mV, Figure 6

50

mV

VCC - 0.4

V

0.4

V

Three-State (High-Impedance)

Output Current at Receiver

IOZR VCC = 3.6V, 0 ≤ VOUT ≤ VCC

±1

µA

Receiver Input Resistance

RIN -7V ≤ VCM ≤ 12V

12

kΩ

Supply Voltage Range

VCC

3.0

3.6

V

Supply Current

ICC

No load,

DI = 0 or VCC

DE = VCC, RE = 0 or VCC

DE = 0, RE = 0

1.1

2.2

mA

0.95

1.9

Supply Current in Shutdown Mode ISHDN DE = 0, RE = VCC, DI = VCC or 0

0.002

1

µA

2 _______________________________________________________________________________________

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