MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 TransceiversABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC).............................................................12VControl Input Voltage (RE, DE)...................-0.5V to (VCC+ 0.5V)Driver Input Voltage (DI).............................-0.5V to (VCC+ 0.5V)Driver Output Voltage (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)....727mW14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW8-Pin μMAX (derate 4.1mW/°C above +70°C)..............830mW8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW14-Pin CERDIP (derate 9.09mW/°C above +70°C).......727mWOperating Temperature Ranges
MAX4_ _C_ _/MAX1487C_ A...............................0°C to +70°CMAX4__E_ _/MAX1487E_ A.............................-40°C to +85°CMAX4__M_/MAX1487MJA.............................-55°C to +125°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 4R = 27Ωor 50Ω, Figure 4R = 27Ωor 50Ω, Figure 4R = 27Ωor 50Ω, Figure 4DE, DI, REDE, DI, REDE, DI, REDE = 0V;
VCC= 0V or 5.25V,all devices exceptMAX487/MAX1487
MAX487/MAX1487,
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 exceptMAX487/MAX1487
-7V ≤VCM ≤12V, MAX487/MAX1487
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
MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 Transceivers______________________________________________________________Pin DescriptionPINMAX481/MAX483/MAX485/MAX487/MAX1487DIP/SO12μMAX34MAX488/MAX490DIP/SO2—μMAX4—MAX489/MAX491DIP/SO23ROREReceiver Output: If A > B by 200mV, RO will be high;If A < B by 200mV, RO will be low.Receiver Output Enable. RO is enabled whenREis low; RO ishigh impedance whenREis high.Driver Output Enable. The driver outputs, Y and Z, are enabledby bringing DE high. They are high impedance when DE is low. Ifthe driver outputs are enabled, the parts function as line drivers.While they are high impedance, theyfunction as line receivers ifREis low.Driver Input. A low on DI forces output Y low and output Z high.Similarly, a high on DI forces output Y high and output Z low.GroundNoninverting Driver OutputInverting Driver OutputNoninverting Receiver Input and Noninverting Driver OutputNoninverting Receiver InputInverting Receiver Input and Inverting Driver OutputInverting Receiver InputPositive Supply: 4.75V ≤VCC≤5.25VNo Connect—not internally connectedNAMENAMEFUNCTIONFUNCTION35——4DE45——6—7—8—TOP VIEWRO67——8—1—2—3456—8—71—5678—2—13—56, 7910—12—11141, 8, 13DIGNDYZAABBVCCN.C.1R876VCCBAGND RO1R8VCC7BRt6A5GND RE2DE3DI4DMAX481MAX483MAX485MAX487MAX1487RE2DE3BRtARDEDDI5DIP/SOBVCCRO1238765AGND DIDEDI4DRORERE4MAX481MAX483MAX485MAX487MAX1487μMAXNOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH. TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.Figure 1. MAX481/MAX483/MAX485/MAX487/MAX1487 Pin Configuration and Typical Operating Circuit7
MEMORY存储芯片MAX485EEPA+中文规格书 - 图文
