Details, datasheet, quote on part number: MAX1480EA
PartMAX1480EA
CategoryInterface and Interconnect
Description15kV ESD-Protected, ISOlated RS-485/RS-422 Data Interfaces
CompanyMaxim Integrated Products
DatasheetDownload MAX1480EA datasheet
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Features, Applications

The MAX1480EA/MAX1480EC/MAX1490EA/MAX1490EB are complete, electrically isolated, RS-485/RS-422 data communications interface solutions in a hybrid microcircuit. The RS-485/RS-422 I/O pins are protected against 15kV electrostatic discharge (ESD) shocks, without latchup. Transceivers, optocouplers, and a transformer provide a complete interface in a standard DIP package. A single +5V supply on the logic side powers both sides of the interface. The MAX1480EC/MAX1490EB feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates to 160kbps. The MAX1480EA/MAX1490EA driver slew rate is not limited, allowing transmission rates to 2.5Mbps. The MAX1480EA/MAX1480EC are designed for half-duplex communication, while the MAX1490EA/MAX1490EB feature full-duplex communication. Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a highimpedance state. The receiver input has a fail-safe feature that guarantees a known output (RO low for the MAX1480EA/MAX1480EC, RO high for the MAX1490EB) if the input is open circuit. The MAX1480EA/MAX1480EC/MAX1490EA/MAX1490EB withstand 1520VRMS (1s). Their isolated outputs meet all RS-485/RS-422 specifications. The MAX1480EA/MAX1480EC are available a 28-pin DIP package, and the MAX1490EA/MAX1490EB are available a 24-pin DIP package.

o Isolated Data Interface, Guaranteed o 15kV ESD Protection on I/O Pins o Slew-Rate Limited for Errorless Data Transmission (MAX1480EC/MAX1490EB) o High-Speed, Isolated, 2.5Mbps RS-485/RS-422 Interface (MAX1480EA/MAX1490EA) o Full-Duplex Data Communication (MAX1490EA/MAX1490EB) o Single +5V Supply o Current Limiting and Thermal Shutdown for Driver Overload Protection o Standard 0.6in DIP Packages 28-Pin DIP (MAX1480EA/MAX1480EC) 24-Pin DIP (MAX1490EA/MAX1490EB)

PART MAX1480EACPI MAX1480EAEPI TEMP. RANGE to +85C PIN-PACKAGE 28 Wide Plastic DIP* 28 Wide Plastic DIP*

Ordering Information continued at end of data sheet. Data rate for A parts to 2.5Mbps. Data rate for C parts to 250kbps. *See Reliability section at end of data sheet.

Isolated RS-485/RS-422 Data Interface Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks Automatic Test Equipment HVAC/Building Control Networks Telecom

DIP Selector Guide appears at end of data sheet. Pin Configurations continued at end of data sheet. 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

With Respect to GND_ Supply Voltage to +6V Control Input Voltage (SD, FS)..............-0.3V to (VCC_ + 0.3V) Receiver Output Voltage (RO, RO).......-0.3V to (VCC_ + 0.3V) Output Switch Voltage (D1, D2).......................................+12V With Respect to ISO COM_ Control Input Voltage (ISO DE_)....-0.3V to (ISO VCC_ + 0.3V) Driver Input Voltage (ISO DI_).......-0.3V to (ISO VCC_ + 0.3V) Receiver Output Voltage (ISO RO_)..-0.3V to (ISO VCC_ + 0.3V) Driver Output Voltage (A, to +12.5V Receiver Input Voltage (A, to +12.5V LED Forward Current (DI, DE, ISO RO LED)......................50mA Continuous Power Dissipation (TA +70C) 24-Pin Plastic DIP (derate 8.7mWC above +70C)....696mW 28-Pin Plastic DIP (derate 9.09mW/C above +70C).727mW Operating Temperature Ranges to +85C Storage Temperature to +150C Lead Temperature (soldering, 10s).................................+300C

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.

(VCC_ +5V 10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = +5V and = +25C.) (Notes 1, 2) PARAMETER Switch Frequency SYMBOL fSWL fSWH VFS FS = VCC_ or open MAX1480EA, DE = VCC_ or open MAX1480EC, DE = VCC_ or open MAX1490EA MAX1490EB Shutdown Supply Current (Note 3) Shutdown Input Threshold Shutdown Input Leakage Current FS Input Threshold FS Input Pullup Current FS Input Leakage Current Input High Voltage Input Low Voltage Isolation Voltage Isolation Resistance Isolation Capacitance Differential Driver Output (No Load) Differential Driver Output (with Load) VIH VIL VISO RISO CISO 27 (RS-485), Figure 2 1.5 VFSH VFSL High Low FS low FS high DE, DI, Figures 1 and 2 DE, DI, Figures 1 and +25C, 1min (Note = +25C, VISO = 1MHz VCC ISHDN VSDH VSDL SD = VCC_ High Low = 54 CONDITIONS MIN TYP mA MAX UNITS kHz mA

(VCC_ +5V 10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = +5V and = +25C.) (Notes 1, 2) PARAMETER Change in Magnitude of Driver Output Voltage for Complementary Output States Driver Common-Mode Output SYMBOL VOD VOC CONDITIONS or 50, Figure or 50, Figure (MAX1480E_) (MAX1490E_) Differential Common mode MIN TYP MAX kV V UNITS

Receiver Input Resistance Receiver Differential Threshold Receiver Input Hysteresis Receiver Output Low Voltage Receiver Output High Current Driver Short-Circuit Current ESD Protection

Using resistor values listed in Tables 1 and 2 VOUT VO 12V (Note B, Y, and Z pins, tested using Human Body Model, Figures 1 and 2

(VCC_ +5V 10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = +5V and = +25C.) PARAMETER Driver Input to Output Propagation Delay Driver Output Skew Driver Rise or Fall Time Driver Enable to Output High (MAX1480EA Only) Driver Enable to Output Low (MAX1480EA Only) Driver Disable Time from Low (MAX1480EA Only) Driver Disable Time from High (MAX1480EA Only) Receiver Input to Output Propagation Delay SYMBOL tPLH tPHL tSKEW tR, tF tZH tZL tLZ tHZ tPLH tPHL CONDITIONS Figures 5 and 7, RDIFF = 100pF Figures 5 and 7, RDIFF = 100pF Figures 5 and 7, RDIFF = 100pF Figures 6 and 100pF, S2 closed Figures 6 and 100pF, S1 closed Figures 6 and 15pF, S1 closed Figures 6 and 15pF, S2 closed Figures 5 and 10, RDIFF = 100pF MIN TYP MAX UNITS s ns


 

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