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MAX22288
Home Bus System (HBS) Compatible
Transceiver
General Description
Benefits and Features
The MAX22288 Home Bus System (HBS) compatible
transceiver can be used in the Home Bus System, where
data and power are passed on a single pair of wires
while minimizing the need for external components.
• Robust Communication with Configurability
• Dynamic Cable Termination Improves Signal
Quality for High-Speed Applications
• Adjustable Slew Rates for Low EMI
• Maximum Data Rate up to 200kbps over 1000m
UTP Cable
• Programmable Receiver Thresholds
• Space Saving
• 4mm x 4mm TQFN package
The MAX22288 provides robust communication by
using dynamic cable termination that improves the
signal quality with longer cables and higher data rates.
The device data outputs AIO/BIO do not load the bus
when the MAX22288 is not powered. The MAX22288
supports passing data with speed up to 200kbps.
• Pin-to-pin Compatible with the MAX22088
• Integrated Protection
The MAX22288 features adjustable receiver thresholds
and driver slew rates that allow the MAX22288 to be
used in a wide variety of systems. Integrated protection
ensures robust communication in harsh industrial
environments.
• IEC 61000-4-2 ±8kV Contact and ±15kV Air-Gap
ESD Protection
• IEC 61000-4-5 ±1kV Transient Surge Protection
with Selected External Components
• -40°C to +125°C Operating Temperature Range
The MAX22288 is pin-to-pin compatible with the
MAX22088, the Home Bus System (HBS) Compatible
Transceiver with Active Inductor. The MAX22288 is
recommended for use in an HBS system where an
external power supply is typically available.
Applications
•
•
•
HVAC
Building Controllers
Industrial IoT
The MAX22288 is specified for operation over the -40°C
to +125°C temperature range and is available in a
compact 24-pin 4mm x 4mm TQFN package.
Ordering Information appears at end of data sheet.
Simplified Home Bus System (HBS)
18V
POWER
SUPPLY
H+
H-
H+
180k
1μF
H-
100nF
CAPP
HPA
C
IO
C
IO
C
IO
C
IO
V
HP
HN
RAW
100μF
EN
AIO
5V
V
CC
AIO
CAPN
HNA
1μF
10μF
100nF
GND
R
TRM
BIO
BIO
R
TRMO
V
CC
5V OUTPUT
R
TRMO
TERM
SRA
10μF
1μF
MAX22088
MAX22288
GND
TERM
R
SRA
WDEN
V
CC
V
CC
SRA
R
SRA
TVL
TVT
TVL
TVT
DIN
RST
MICRO
CONTROLLER
DIN
MICRO
CONTROLLER
DOUT
RST
DOUT
19-101199; Rev 0; 7/21