MAX13487E_15 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – Half-Duplex RS-485-/RS-422-Compatible Transceiver with AutoDirection Control

MAX13487E/MAX13488E
EVALUATION KIT AVAILABLE
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
Ordering Information/
Selector Guide
PART
PIN-PACKAGE
SLEW-RATE
LIMITED
MAX13487EESA+ 8 SO
Yes
MAX13488EESA+ 8 SO
No
+Denotes a lead(Pb)-free/RoHS-compliant package.
Note: All devices operate over the -40°C to +85°C temperature
range.
Benefits and Features
• AutoDirection Saves Space and BOM Cost
• AutoDirection Enables Driver Automatically on
Transmission, Eliminating an Opto or Other
Discrete Means of Isolation
• 8-Pin SO Package
• Robust Protection Features for Telecom, Industrial,
and Isolated Applications
• Hot-Swap Capability to Eliminate False Transitions
on the Bus During Power-Up or Live Insertion
• Extended ESD Protection for RS-485 I/O Pins
(±15kV Human Body Model)
• Options Optimize Designs for Speed or Errorless
Data Transmission
• Enhanced Slew-Rate Limiting Facilitates Error-
Free Data Transmission (MAX13487E)
• High-Speed Version (MAX13488E) Allows for
Transmission Speeds Up to 16Mbps
• 1/4-Unit Load, Allowing Up to 128 Transceivers on
the Bus
Functional Diagram
1 RO
2 RE
MAX13487E
MAX13488E
3 _SHDN
RI STATE
MACHINE
DI
4
DI
+
R
-
RE
V_CC ⁸
- V_DT
B7
COM
+
A6
DE
D
5
GND
Pin Configuration/Typical Application Circuit appear at end
of data sheet.
19-0740; Rev 1; 2/15