MAX487ECSA-T Maxim Integrated, MAX487ECSA-T Datasheet

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MAX487ECSA-T

Manufacturer Part Number
MAX487ECSA-T
Description
RS-422/RS-485 Interface IC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX487ECSA-T

Data Rate
250 Kbps
Operating Supply Voltage
4.75 V to 5.25 V
Supply Current
0.4 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Input Voltage
4.75 V to 5.25 V
Maximum Power Dissipation
727 mW
Output Voltage
- 8 V to + 12.5 V
Product
RS-422/RS-485 Combination
Propagation Delay Time Ns
250 ns

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX487ECSA-T
Manufacturer:
TI
Quantity:
27
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
The MAX481E, MAX483E, MAX485E, MAX487E–
MAX491E, and MAX1487E are low-power transceivers for
RS-485 and RS-422 communications in harsh environ-
ments. Each driver output and receiver input is protected
against ±15kV electro-static discharge (ESD) shocks,
without latchup. These parts contain one driver and one
receiver. The MAX483E, MAX487E, MAX488E, and
MAX489E feature reduced slew-rate drivers that minimize
EMI and reduce reflections caused by improperly termi-
nated cables, thus allowing error-free data transmission
up to 250kbps. The driver slew rates of the MAX481E,
MAX485E, MAX490E, MAX491E, and MAX1487E are not
limited, allowing them to transmit up to 2.5Mbps.
These transceivers draw as little as 120µA supply cur-
rent when unloaded or when fully loaded with disabled
drivers (see Selector Guide). Additionally, the MAX481E,
MAX483E, and MAX487E have a low-current shutdown
mode in which they consume only 0.5µA. All parts oper-
ate from a single +5V supply.
Drivers are short-circuit current limited, and are protected
against excessive power dissipation by thermal shutdown
circuitry that places their outputs into a high-impedance
state. The receiver input has a fail-safe feature that guar-
antees a logic-high output if the input is open circuit.
The MAX487E and MAX1487E feature quarter-unit-load
receiver input impedance, allowing up to 128 trans-
ceivers on the bus. The MAX488E–MAX491E are
designed for full-duplex communications, while the
MAX481E, MAX483E, MAX485E, MAX487E, and
MAX1487E are designed for half-duplex applications.
For applications that are not ESD sensitive see the pin-
and function-compatible MAX481, MAX483, MAX485,
MAX487–MAX491, and MAX1487.
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
Functional Diagrams
General Description
Applications
MAX487E–MAX491E/MAX1487E
MAX481E/MAX483E/MAX485E/
♦ For Fault-Tolerant Applications:
♦ For Space-Constrained Applications:
♦ For Multiple Transceiver Applications:
♦ For Fail-Safe Applications:
♦ For Low-Voltage Applications:
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
MAX481ECPA
MAX481ECSA
MAX481EEPA
MAX481EESA
MAX483ECPA
MAX483ECSA
MAX483EEPA
MAX483EESA
Next-Generation Device Features
MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4-
Unit Load, +3.3V, RS-485 Transceiver
MAX3080–MAX3089: Fail-Safe, High-Speed
(10Mbps), Slew-Rate-Limited, RS-485/RS-422
Transceivers
MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,
Profibus, RS-485/RS-422 Transceivers
MAX3362: +3.3V, High-Speed, RS-485/RS-422
Transceiver in a SOT23 Package
MAX3280E–MAX3284E: ±15kV ESD-Protected,
52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422
True Fail-Safe Receivers
MAX3030E–MAX3033E: ±15kV ESD-Protected,
+3.3V, Quad RS-422 Transmitters
MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,
SOT23, RS-485/RS-422 Transmitters
MAX3440E–MAX3444E: ±15kV ESD-Protected,
±60V Fault-Protected, 10Mbps, Fail-Safe
RS-485/J1708 Transceivers
MAX3483E/MAX3485E/MAX3486E/MAX3488E/
MAX3490E/MAX3491E: +3.3V Powered, ±15kV
ESD-Protected, 12Mbps, Slew-Rate-Limited,
True RS-485/RS-422 Transceivers
PART
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
19-0410; Rev 4; 10/03

Related parts for MAX487ECSA-T

MAX487ECSA-T Summary of contents

Page 1

... Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. MAX481E/MAX483E/MAX485E/ MAX487E– ...

Page 2

... V ≤ 12V, all devices except CM MAX487E/MAX1487E R IN -7V ≤ V ≤ 12V, MAX487E/MAX1487E CM MIN TYP MAX 2 1.5 2 12V -7V -0 12V 0. -7V -0.2 IN -0 UNITS 0 0 0.8 V ±2 µ 0.4 V ±1 µA kΩ kΩ Maxim Integrated ...

Page 3

... PHL t Receiver Skew Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable Time from Low Receiver Disable Time from High Maximum Data Rate f Time to Shutdown t SHDN Maxim Integrated MAX487E–MAX491E/MAX1487E CONDITIONS MAX488E/MAX489E, – — – DE, DI MAX490E/MAX491E, – ...

Page 4

... TYP MAX UNITS 250 800 2000 ns 250 800 2000 20 800 ns 250 2000 ns 250 2000 ns 250 2000 ns 300 3000 ns 300 3000 ns 250 2000 ns 250 2000 100 250 kbps 50 200 600 ns 2000 ns 2000 ns 2500 ns 2500 ns Maxim Integrated ...

Page 5

... OUTPUT LOW VOLTAGE (V) RECEIVER OUTPUT LOW VOLTAGE vs. TEMPERATURE 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -60 -40 -20 0 TEMPERATURE (°C) Maxim Integrated MAX487E–MAX491E/MAX1487E = 5V and T = +25° OUTPUT CURRENT vs. RECEIVER OUTPUT HIGH VOLTAGE -25 -20 -15 - 2.5 1.5 2.0 2.5 3.0 3.5 4.0 OUTPUT HIGH VOLTAGE ( 8mA ...

Page 6

... OUTPUT HIGH VOLTAGE (V) MAX1487E SUPPLY CURRENT vs. TEMPERATURE 600 500 400 MAX1487E 300 200 MAX1487E 0V 100 100 -60 -40 - TEMPERATURE (°C) Maxim Integrated 100 ...

Page 7

... Maxim Integrated MAX487E–MAX491E/MAX1487E NAME MAX489E MAX491E Receiver Output > 200mV, RO will be high < 200mV, RO will be low. – — – Receiver Output Enable enabled when low ...

Page 8

... N. N. GND RE MAX481E 0.1μF MAX483E MAX485E MAX487E MAX1487E MAX488E MAX490E GND 0.1μF MAX489E MAX491E GND Maxim Integrated ...

Page 9

... As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro- static discharges encountered during handling and assembly. The driver outputs and receiver inputs have extra protection against static electricity. Maxim’s engi- Maxim Integrated MAX487E–MAX491E/MAX1487E Table 2. Receiving OUTPUTS Z ...

Page 10

... Figure 7. IEC1000-4-2 ESD Generator Current Waveform RECEIVER OUTPUT V OC Figure 9. Receiver Timing Test Load 100% PEAK-TO-PEAK RINGING I r 90% (NOT DRAWN TO SCALE) 36.8% 10% 0 TIME CURRENT WAVEFORM I 100% 90% 10% 30ns 60ns TEST POINT 15pF Maxim Integrated ...

Page 11

... SKEW = PLH PHL Figure 12. Driver Propagation Delays 1.5V V OUTPUT OL t PHL INPUT ID Figure 14. Receiver Propagation Delays Maxim Integrated MAX487E–MAX491E/MAX1487E UNDER TEST RE Figure 11. Driver Timing Test Load PHL 1 90% 0V 10% ...

Page 12

... MAX485E, MAX488E– MAX491E, and MAX1487E can not be shut down). The t and t ZH(SHDN) parts were shut down (see Electrical Characteristics ). 5MHz 500kHz/div Reduced EMI and Reflections Low-Power Shutdown Mode (MAX481E/MAX483E/MAX487E) enable times assume the ZL(SHDN) Maxim Integrated ZH ...

Page 13

... Propagation Delay Many digital encoding schemes depend on the differ- ence between the driver and receiver propagation Maxim Integrated MAX487E–MAX491E/MAX1487E delay times. Typical propagation delays are shown in Figures 19–22 using Figure 18’s test circuit. ...

Page 14

... A 5V/div RO Figure 20. MAX481E/MAX485E/MAX490E/MAX491E/ MAX1487E Receiver t PLH B 500mV/div A 5V/div RO Figure 22. MAX483E/MAX487E–MAX489E Receiver t PHL - Figure 24. MAX483E/MAX1487E–MAX489E System Differential Voltage at 110kHz Driving 4000ft of Cable 25ns/div 200ns/div PLH - 2μs/div Maxim Integrated ...

Page 15

... MAX485E MAX487E MAX1487E Figure 25. MAX481E/MAX483E/MAX485E/MAX487E/MAX1487E Typical Half-Duplex RS-485 Network A 120Ω 120Ω NOTE: RE AND DE ON MAX489E/MAX491E ONLY. Figure 26. MAX488E–MAX491E Full-Duplex RS-485 Network Maxim Integrated MAX487E–MAX491E/MAX1487E ...

Page 16

... MAX485ECPA 0°C to +70°C MAX485ECSA 0°C to +70°C MAX485EEPA -40°C to +85°C MAX485EESA -40°C to +85°C MAX487ECPA 0°C to +70°C MAX487ECSA 0°C to +70°C MAX487EEPA -40°C to +85°C MAX487EESA -40°C to +85°C MAX488ECPA 0°C to +70°C MAX488ECSA 0°C to +70°C MAX488EEPA -40° ...

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