Rainbow Electronics MAX13486E User Manual
General description, Applications, Features
General Description
The MAX13485E/MAX13486E +5V, half-duplex, ±15kV
ESD-protected RS-485 transceivers feature one driver
and one receiver. These devices include fail-safe circuitry,
guaranteeing a logic-high receiver output when receiver
inputs are open or shorted. The receiver outputs a logic-
high if all transmitters on a terminated bus are disabled
(high impedance). The MAX13485E/MAX13486E include
a hot-swap capability to eliminate false transitions on the
bus during power-up or live-insertion.
The MAX13485E 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 MAX13486E driver slew
rate is not limited, allowing transmit speeds up to
16Mbps.
The MAX13485E/MAX13486E feature a 1/4-unit load
receiver input impedance, allowing up to 128 transceivers
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 MAX13485E/
MAX13486E are available in 8-pin SO and space-saving
8-pin µDFN packages. The devices operate over the
extended -40°C to +85°C temperature range.
Applications
Utility Meters
Industrial Controls
Industrial Motor Drives
Automated HVAC Systems
Features
♦ +5V Operation
♦ True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
♦ Hot-Swappable for Telecom Applications
♦ Enhanced Slew-Rate Limiting Facilitates Error-
Free Data Transmission (MAX13485E)
♦ High-Speed Version (MAX13488E) Allows for
Transmission Speeds Up to 16Mbps
♦ Extended ESD Protection for RS-485/RS-422 I/O
Pins ±15kV Using Human Body Model
♦ 1/4 Unit Load, Allowing Up to 128 Transceivers on
the Bus
♦ Available in Space-Saving 8-Pin µDFN or Industry
Standard 8-Pin SO Packages
MAX13485E/MAX13486E
Half-Duplex RS-485/RS-422 Transceivers in µDFN
________________________________________________________________ Maxim Integrated Products
1
19-0742; Rev 0; 1/07
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.
Ordering Information/
Selector Guide
PART
PIN-
PACKAGE
SLEW-RATE
LIMITED
PKG
CODE
MAX13485EELA+T
8 µDFN
Yes
L822-1
MAX13485EESA+
8 SO
Yes
S8-2
MAX13486EELA+T
8 µDFN
No
L822-1
MAX13486EESA+
8 SO
No
S8-2
+Denotes a lead-free package.
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
Rt
RE
RO
B
A
A
B
Rt
R
D
RO
DI
8
7
6
5
1
2
3
4
RE
DE
R
DI
D
DE
+
1
2
3
8
7
4
6
5
V
CC
A
GND
B
RO
DI
DE
RE
MAX13485E
MAX13486E
DFN
+
A
GND
DI
1
2
8
7
V
CC
B
RE
DE
RO
SO
SO
3
4
6
5
R
D
+
TOP VIEW
GND
V
CC
0.1
µF
MAX13485E
MAX13486E
Pin Configurations