MAX13487E Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control

19-0740; Rev 0; 1/07
Half-Duplex RS-485-/RS-422-Compatible
Transceiver with AutoDirection Control
General Description
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.
Applications
Isolated RS-485 Interfaces
Utility Meters
Industrial Controls
Industrial Motor Drives
Automated HVAC Systems
Features
♦ +5V Operation
♦ AutoDirection Enables Driver Automatically on
Transmission
♦ Hot-Swappable for Telecom Applications
♦ Enhanced Slew-Rate Limiting Facilitates Error-
Free Data Transmission (MAX13487E)
♦ High-Speed Version (MAX13488E) Allows for
Transmission Speeds Up to 16Mbps
♦ 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
Ordering Information/
Selector Guide
PART
PIN-
PACKAGE
SLEW-RATE PKG
LIMITED
CODE
MAX13487EESA+ 8 SO
MAX13488EESA+ 8 SO
Yes
S8-2
No
S8-2
+Denotes a lead-free package
All devices operate over the -40°C to +85°C temperature range.
Functional Diagram
1 RO
2 RE
MAX13487E
MAX13488E
+
R
-
RE
V_CC ⁸
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
3 _SHDN
4
DI
RI STATE
DI ^MACHINE
- V_DT
B7
COM
+
A6
DE
D
5
GND
________________________________________________________________ Maxim Integrated Products 1
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