MAX13485EESA Maxim Integrated Products, MAX13485EESA Datasheet

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MAX13485EESA

Manufacturer Part Number
MAX13485EESA
Description
Manufacturer
Maxim Integrated Products
Datasheet

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0
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.
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.
Half-Duplex RS-485/RS-422 Transceivers in µDFN
Utility Meters
Industrial Controls
Industrial Motor Drives
Automated HVAC Systems
MAX13486E
MAX13485E
________________________________________________________________ Maxim Integrated Products
TOP VIEW
General Description
RO
DE
RE
DI
+
V
RO
1
2
3
4
CC
8
1
MAX13486E
+
MAX13485E
D
R
RE
B
7
2
DFN
SO
Applications
DE
A
6
3
GND
DI
5
4
8
7
6
5
V
B
A
GND
CC
RO
RE
DE
DI
1
2
3
4
+
D
R
SO
o +5V Operation
o True Fail-Safe Receiver While Maintaining
o Hot-Swappable for Telecom Applications
o Enhanced Slew-Rate Limiting Facilitates Error-
o High-Speed Version (MAX13488E) Allows for
o Extended ESD Protection for RS-485/RS-422 I/O
o 1/4 Unit Load, Allowing Up to 128 Transceivers on
o Available in Space-Saving 8-Pin µDFN or Industry
+Denotes a lead-free package.
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
8
7
6
5
MAX13485EELA+T
MAX13485EESA+
MAX13486EELA+T
MAX13486EESA+
EIA/TIA-485 Compatibility
Free Data Transmission (MAX13485E)
Transmission Speeds Up to 16Mbps
Pins ±15kV Using Human Body Model
the Bus
Standard 8-Pin SO Packages
GND
A
B
V
PART
0.1µF
CC
Rt
PIN-
PACKAGE
8 µDFN
8 SO
8 µDFN
8 SO
Ordering Information/
Rt
B
A
Pin Configurations
Selector Guide
SLEW-RATE
R
RE
DE
LIMITED
D
Yes
Yes
No
No
DI
RO
Features
L822-1
L822-1
CODE
PKG
S8-2
S8-2
1

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MAX13485EESA Summary of contents

Page 1

... Pins ±15kV Using Human Body Model o 1/4 Unit Load, Allowing Up to 128 Transceivers on the Bus o Available in Space-Saving 8-Pin µDFN or Industry Standard 8-Pin SO Packages MAX13485EELA+T Applications MAX13485EESA+ MAX13486EELA+T MAX13486EESA+ +Denotes a lead-free package. Note: All devices are specified over the -40°C to +85°C operating temperature range. A ...

Page 2

Half-Duplex RS-485/RS-422 Transceivers in µDFN ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) V ........................................................................................+6V CC RE, DI.................................................................-0.3V to +6V DE ..............................................................................-8V to 13V Short-Circuit Duration (RO GND ..................Continuous Continuous Power Dissipation (T = +70°C) ...

Page 3

Half-Duplex RS-485/RS-422 Transceivers in µDFN ELECTRICAL CHARACTERISTICS (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Output-Low Voltage Tri-State Output Current at Receiver Receiver ...

Page 4

Half-Duplex RS-485/RS-422 Transceivers in µDFN SWITCHING CHARACTERISTICS—MAX13485E (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Receiver Enable to Output High t Receiver Enable ...

Page 5

Half-Duplex RS-485/RS-422 Transceivers in µDFN SWITCHING CHARACTERISTICS—MAX13486E (continued +5V ±5 unless otherwise noted. Typical values are MIN MAX PARAMETER SYMBOL Receiver Enable to Output High Receiver Enable to ...

Page 6

Half-Duplex RS-485/RS-422 Transceivers in µDFN (V = +5V +25°C, unless otherwise noted RECEIVER OUTPUT HIGH VOLTAGE vs. TEMPERATURE 5 1mA O 5.2 5.0 4.8 4.6 4.4 4.2 4.0 -40 - ...

Page 7

Half-Duplex RS-485/RS-422 Transceivers in µDFN (V = +5V +25°C, unless otherwise noted RECEIVER PROPAGATION vs. TEMPERATURE (MAX13485E RPHL RPLH 0 -40 - TEMPERATURE (°C) DRIVER PROPAGATION (16Mbps) ...

Page 8

Half-Duplex RS-485/RS-422 Transceivers in µDFN A R DIFF DIFF 2 B Figure 1. Driver DC Test Load 1 DIFF 10% ...

Page 9

Half-Duplex RS-485/RS-422 Transceivers in µDFN Figure 4. Driver Enable and Disable Times 500Ω OUTPUT UNDER TEST C L Figure 5. Driver-Enable and -Disable-Timing Test Load ...

Page 10

Half-Duplex RS-485/RS-422 Transceivers in µDFN PIN NAME 1 RO Receiver Output Receiver Output Enable. Drive RE low to enable RO high impedance when RE is high. Drive RE RE high and DE low to enter low-power shutdown mode. ...

Page 11

Half-Duplex RS-485/RS-422 Transceivers in µDFN +1V -1V S1 OPEN S2 CLOSED OPEN S2 CLOSED RHZ RO 0.25V Figure 8. Receiver Enable and Disable Times __________________________________________________________________________ Test ...

Page 12

Half-Duplex RS-485/RS-422 Transceivers in µDFN Detailed Description The MAX13485E/MAX13486E half-duplex, high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail- safe circuitry that guarantees a logic-high receiver out- put when receiver inputs are open or ...

Page 13

Half-Duplex RS-485/RS-422 Transceivers in µDFN 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 10a. Human Body ESD Test Model I 100 90% AMPS 36.8% ...

Page 14

Half-Duplex RS-485/RS-422 Transceivers in µDFN MAX13485E MAX13486E Figure 11. Typical Half-Duplex RS-485 Network withstand voltage measured to IEC 61000-4-2 is gener- ally lower than that measured using the Human Body Model. Figure ...

Page 15

Half-Duplex RS-485/RS-422 Transceivers in µDFN (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages TOP VIEW FRONT VIEW ______________________________________________________________________________________ E ...

Page 16

... 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Boblet ...

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