MEMORY存储芯片MAX481ECPA+中文规格书 - 图文

MAX481E/MAX483E/MAX485E/ MAX487E–MAX491E/MAX1487E

±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 TransceiversABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC).............................................................12V

–—–

Control Input Voltage (RE, DE)...................-0.5V to (VCC+ 0.5V)Driver Input Voltage (DI).............................-0.5V to (VCC+ 0.5V)Driver Output Voltage (Y, Z; A, B)..........................-8V to +12.5VReceiver Input Voltage (A, B).................................-8V to +12.5VReceiver Output Voltage (RO)....................-0.5V to (VCC+ 0.5V)Continuous Power Dissipation (TA= +70°C)

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

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW8-Pin SO (derate 5.88mW/°C above +70°C).................471mW14-Pin SO (derate 8.33mW/°C above +70°C)...............667mWOperating Temperature Ranges

MAX4_ _C_ _/MAX1487EC_ A.............................0°C to +70°CMAX4__E_ _/MAX1487EE_ A...........................-40°C to +85°CStorage Temperature Range.............................-65°C to +160°CLead 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 functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.DC ELECTRICAL CHARACTERISTICS

(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted.) (Notes 1, 2)

PARAMETER

Differential Driver Output (no load)Differential Driver Output(with load)

Change in Magnitude of DriverDifferential Output Voltage forComplementary Output StatesDriver Common-Mode OutputVoltage

Change in Magnitude of DriverCommon-Mode Output Voltagefor Complementary Output StatesInput High VoltageInput Low VoltageInput Current

SYMBOLVOD1VOD2ΔVODVOCΔVODVIHVILIIN1

R = 50Ω(RS-422)

R = 27Ω(RS-485), Figure 8R = 27Ωor 50Ω, Figure 8R = 27Ωor 50Ω, Figure 8R = 27Ωor 50Ω, Figure 8–—–DE, DI, RE

–—–DE, DI, RE

–—–DE, DI, RE

DE = 0V;

VCC= 0V or 5.25V,all devices exceptMAX487E/MAX1487EMAX487E/MAX1487E,

DE = 0V, VCC= 0V or 5.25V

Receiver Differential ThresholdVoltage

Receiver Input HysteresisReceiver Output High VoltageReceiver Output Low VoltageThree-State (high impedance)Output Current at Receiver

VTHΔVTHVOHVOLIOZR

-7V≤VCM≤12VVCM= 0V

IO= -4mA, VID= 200mVIO= 4mA, VID= -200mV0.4V≤VO≤2.4V

-7V≤VCM≤12V, all devices exceptMAX487E/MAX1487E

-7V≤VCM≤12V, MAX487E/MAX1487E

12483.5

0.4±1

VIN= 12VVIN= -7VVIN= 12VVIN= -7V

-0.2

70

2.0

0.8±21.0

mA

-0.80.25-0.20.2

mAVmVVVμAkΩkΩ

21.5

50.230.2

CONDITIONS

MIN

TYP

MAX5

UNITSVVVVVVVμA

Input Current(A, B)

IIN2

Receiver Input ResistanceRIN

2

MAX481E/MAX483E/MAX485E/ MAX487E–MAX491E/MAX1487E

±15kV ESD-Protected, Slew-Rate-Limited,Low-Power, RS-485/RS-422 Transceivers120ΩDIB120ΩBDEDDEROREABABAADDIRRRDRROREMAX481EMAX483EMAX485EMAX487EMAX1487EDDIDEROREDIDEROREFigure 25. MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E Typical Half-Duplex RS-485 NetworkAROREDEZDIY120Ω120ΩZDEB120Ω120ΩYZBAYZBAARERORBDDIDYRRDDRDIDERERODIDEREROMAX488EMAX489EMAX490EMAX491ENOTE: RE AND DE ON MAX489E/MAX491E ONLY.Figure 26. MAX488E–MAX491E Full-Duplex RS-485 Network15