MAX13487EESA Maxim Integrated Products, MAX13487EESA Datasheet

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MAX13487EESA

Manufacturer Part Number
MAX13487EESA
Description
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX13487E/MAX13488E +5V, half-duplex, ±15kV
ESD-protected RS-485/RS-422-compatible transceivers
feature one driver and one receiver. The MAX13487E/
MAX13488E include a hot-swap capability to eliminate
false transitions on the bus during power-up or live
insertion.
The MAX13487E/MAX13488E feature Maxim’s propri-
etary AutoDirection control. This architecture makes the
devices ideal for applications, such as isolated RS-485
ports, where the driver input is used in conjunction with
the driver-enable signal to drive the differential bus.
The MAX13487E features reduced slew-rate drivers
that minimize EMI and reduce reflections caused by
improperly terminated cables, allowing error-free trans-
mission up to 500kbps. The MAX13488E driver slew
rate is not limited, allowing transmit speeds up to
16Mbps.
The MAX13487E/MAX13488E feature a 1/4-unit load
receiver input impedance, allowing up to 128 trans-
ceivers on the bus. These devices are intended for half-
duplex communications. All driver outputs are
protected to ±15kV ESD using the Human Body Model.
The MAX13487E/MAX13488E are available in an 8-pin
SO package. The devices operate over the extended
-40°C to +85°C temperature range.
19-0740; Rev 0; 1/07
Pin Configuration/Typical Application Circuit appear at end
of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Isolated RS-485 Interfaces
Utility Meters
Industrial Controls
Industrial Motor Drives
Automated HVAC Systems
________________________________________________________________ Maxim Integrated Products
Half-Duplex RS-485-/RS-422-Compatible
Transceiver with AutoDirection Control
General Description
Applications
♦ +5V Operation
♦ AutoDirection Enables Driver Automatically on
♦ Hot-Swappable for Telecom Applications
♦ Enhanced Slew-Rate Limiting Facilitates Error-
♦ High-Speed Version (MAX13488E) Allows for
♦ Extended ESD Protection for RS-485 I/O Pins
♦ 1/4-Unit Load, Allowing Up to 128 Transceivers on
♦ 8-Pin SO Package
+Denotes a lead-free package
All devices operate over the -40°C to +85°C temperature range.
MAX13487EESA+
MAX13488EESA+
Transmission
Free Data Transmission (MAX13487E)
Transmission Speeds Up to 16Mbps
±15kV Human Body Model
the Bus
1
2
3
4
RO
DI
SHDN
PART
RE
RI
DI
MAX13487E
MAX13488E
MACHINE
STATE
PIN-
PACKAGE
8 SO
8 SO
Ordering Information/
Functional Diagram
RE
COM
D
Selector Guide
R
DE
SLEW-RATE
+
-
LIMITED
+
-
Yes
V
No
DT
Features
V
GND
CC
B
A
CODE
PKG
S8-2
S8-2
8
7
6
5
1

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MAX13487EESA Summary of contents

Page 1

... Extended ESD Protection for RS-485 I/O Pins ±15kV Human Body Model ♦ 1/4-Unit Load, Allowing Up to 128 Transceivers on the Bus ♦ 8-Pin SO Package PART MAX13487EESA+ MAX13488EESA+ +Denotes a lead-free package All devices operate over the -40°C to +85°C temperature range. Applications 1 RO ...

Page 2

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Supply Voltage V ...............................................................+6V CC SHDN, RE, DI..............................................................-0. B........................................................................... -8V to +13V Short-Circuit Duration (RO GND ..................Continuous Continuous Power Dissipation ...

Page 3

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control ELECTRICAL CHARACTERISTICS (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL POWER SUPPLY Supply Voltage Supply Current Shutdown ...

Page 4

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control SWITCHING CHARACTERISTICS—MAX13487E (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Receiver Enable from Shutdown t to Output ...

Page 5

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control SWITCHING CHARACTERISTICS—MAX13488E (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Receiver Enable from Shutdown to Output Low ...

Page 6

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control (V = +5.0V +25°C, unless otherwise noted DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURE 3 54Ω DIFF 2.5 2.0 1.5 1.0 0.5 0 -40 - ...

Page 7

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control (V = +5.0V +25°C, unless otherwise noted RECEIVER PROPAGATION vs. TEMPERATURE (MAX13488E RPLH 20 t RPHL 10 0 -40 - TEMPERATURE (°C) RECEIVER PROPAGATION ...

Page 8

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control Figure 1. Driver DC Test Load 1 (RO PULLED LOW DIFF ...

Page 9

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control 500Ω OUTPUT UNDER TEST C L Figure 4. Driver Enable and Disable Times V ATE ID Figure 5. Receiver-Propagation-Delay Test Circuit Figure 6. Receiver Propagation Delays _______________________________________________________________________________________ ...

Page 10

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control Figure 7. Receiver Enable and Disable Times 500Ω Figure 8. Receiver Enable Time ...

Page 11

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control PIN NAME Receiver Output. When receiver is enabled and V(A) - V(B) > +200mV high. If V( < -200mV low. Receiver Output Enable. Drive RE low ...

Page 12

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control Detailed Description The MAX13487E/MAX13488E half-duplex, high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. The MAX13487E/ MAX13488E feature a hot-swap capability allowing line insertion without erroneous data transfer (see the Hot- Swap ...

Page 13

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control on M2 and sets the SR latch, which also turns on M1. Transistors M2, a 1.5mA current source, and M1, a 500µA current source, pull through a 5kΩ resistor ...

Page 14

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 10a. Human Body ESD Test Model PEAK-TO-PEAK RINGING I 100 ...

Page 15

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control SHDN MAX13487E MAX13488E Figure 11. Typical Half-Duplex RS-485 Network Typical Applications The MAX13487E/MAX13488E transceivers are designed for half-duplex, bidirectional data communi- cations on multipoint bus transmission lines. Figure ...

Page 16

Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control V SYS RXD V SYS TXD 16 ______________________________________________________________________________________ Pin Configurations/Typical Application Circuit V ISO + ISO ISO SHDN ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2007 Maxim Integrated Products ...

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