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Maxim Integrated Semiconductor Electronic Components Datasheet

MAXM22511 Datasheet

RS-485/RS-422 Module Transceiver + Power

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MAXM22510/MAXM22511
2.5kVRMS Complete Isolated RS-485/RS-422
Module Transceiver + Power
General Description
The MAXM22510 and MAXM22511 isolated RS-485/
RS-422, full-duplex, transceiver modules provide
2500VRMS (60s) of galvanic isolation between the cable-
side (RS-485/RS-422 driver/receiver side) and the UART-
side of the device. An integrated DC-DC powers the
cable-side of the module. No external components are
required.
Isolation improves communication by breaking ground
loops and reduces noise when there are large differences
in ground potential between ports. These devices allow
for robust communication up to 500kbps (MAXM22510)
and 25Mbps (MAXM22511).
The MAXM22510/MAXM22511 operate from a single
3.3V supply on the UART-side. An integrated DC-DC
converter generates the 3.3V operating voltage for the
cable-side of the module.
The devices include one drive channel and one receive
channel. The receiver is 1/4-unit load, allowing up to 128
transceivers on a common bus.
Integrated true fail-safe circuitry ensures a logic-high on
the receiver output when inputs are shorted or open.
Undervoltage lockout disables the driver when cable-side
or UART-side power supplies are below functional levels.
The driver outputs and receiver inputs are protected
from ±35kV electrostatic discharge (ESD) to GNDB on
the cable-side, as specified by the Human Body Model
(HBM).
The MAXM22510/MAXM22511 are available in an LGA
44-pin package and operate over the -40°C to +105°C
temperature range.
Ordering Information appears at end of data sheet.
Benefits and Features
● Space Saving Solution
• Fully Integrated Module for Compact Design
● High-Performance Transceiver Enables Flexible Designs
• Integrated DC-DC for Cable-Side Power
• Compliant with RS-485 EIA/TIA-485 Standard
• 500kbps Maximum Data Rate for the MAXM22510
• 25Mbps Maximum Data Rate for the MAXM22511
• Allows Up to 128 Devices on the Bus
● Integrated Protection Ensures for Robust Communication
• ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
• 2.5kVRMS Withstand Isolation Voltage for 60
Seconds (VISO)
• 630VPEAK Maximum Repetitive Peak-Isolation
Voltage (VIORM)
• 445VRMS Maximum Working-Isolation Voltage
(VIOWM)
• Withstands ±10kV Surge per IEC 61000-4-5
• Thermal Shutdown
Safety Regulatory Approvals Pending
● UL According to UL1577
● cUL According to CSA Bulletin 5A
Applications
● Industrial Automation
● Programmable Logic Controllers
● HVAC
● Power Meters
● Building Automation
Functional Diagram
GNDA
VDDA
SD
RXD
RE
DE
TXD
SBA
DC-DC
LDO
MAXM22510
MAXM22511
VRECT
VLDO
VDDB
A
B
Z
Y
GNDA
GNDB
19-100335; Rev 1; 7/18


Maxim Integrated Semiconductor Electronic Components Datasheet

MAXM22511 Datasheet

RS-485/RS-422 Module Transceiver + Power

No Preview Available !

MAXM22510/MAXM22511
2.5kVRMS Complete Isolated RS-485/RS-422
Module Transceiver + Power
Absolute Maximum Ratings
VDDA to GNDA ........................................................-0.3V to +4V
VDDB to GNDB.........................................................-0.3V to +6V
VRECT, VLDO to GNDB............................................-0.3V to +8V
SD, TXD, DE, RE to GNDA .....................................-0.3V to +6V
SBA, RXD to GNDA ............................... -0.3V to (VDDA + 0.3V)
A, B, Y, Z to GNDB....................................................-8V to +13V
Short-Circuit Duration (RXD, SBA to GNDA,
A, B, Y, Z ,VDDB to GNDB).....................................Continuous
Continuous Power Dissipation (TA = +70°C)
44-pin LGA (derate 28.6mW/°C above +70°C)..........2286mW
Operating Temperature Range.......................... -40°C to +105°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Soldering Temperature (reflow)........................................+245°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics (Note 1)
Junction-to-Ambient Thermal Resistance (θJA)............48.3°C/W
Junction-to-Case Thermal Resistance (θJC) (top)........39.2°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
DC Electrical Characteristics
(VDDA – VGNDA = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDDA – VGNDA = 3.3V, VGNDA =
VGNDB, and TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
POWER
Supply Voltage
Supply Current
Shutdown Supply Current
Undervoltage Lockout
Threshold
Undervoltage Lockout
Threshold Hysteresis
Unregulated DC-DC Output
Voltage
VDDA
IDDA
VDDA = 3.3V, DE = high, RE = TXD =
low, SD = low, RXD unconnected,
no load
ISD
VUVLOA
VUVLOB
VUVHYSTA
VUVHYSTB
VRECT
VDDA = 3.3V, SD = high
VDDA rising
VDDB rising
VDDA = 3.3V, DE = high, RE = TXD =
low, SD = low, no load
3.0 3.6
25 44
0.01 10
2.55 2.7 2.85
2.55 2.7 2.85
200
200
6
V
mA
μA
V
mV
V
LDO
LDO Output Voltage
LDO Current Limit
Load Regulation
Line Regulation
Dropout Voltage
Load Capacitance
VDDB
VLDO = 3.3V, ILOAD = -20mA to -40mA
VLDO = 3.3V to 7.5V, ILOAD = -20mA
VLDO = 3.18V, IDDB = -120mA
Nominal value (Note 4)
3.0 3.3 3.6
V
300 mA
0.19 1.7 mV/mA
0.12 mV/V
100 180
mV
1 10 µF
www.maximintegrated.com
Maxim Integrated 2


Part Number MAXM22511
Description RS-485/RS-422 Module Transceiver + Power
Maker Maxim Integrated
Total Page 23 Pages
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