Reduced EMI and Reflections
Due to internal slope control for the MAX3055/
MAX3056, the CANH and CANL outputs are slew-rate
limited. This minimizes EMI and reduces reflections
caused by improperly terminated cables. In general, a
transmitter
’
s rise time relates directly to the length of an
unterminated stub, which can be driven with only minor
waveform reflections. The following equation expresses
this relationship conservatively:
Length = t
RISE
/ (15ns/ft)
where t
RISE
is the transmitter
’
s rise time.
The MAX3054/MAX3055/MAX3056 require no special
layout considerations beyond common practices.
Bypass V
CC
to GND with a 0.1μF ceramic capacitor
mounted close to the IC with short lead lengths and
wide trace widths.
Chip Information
TRANSISTOR COUNT: 1300
PROCESS: BiCMOS
M
±80V Fault-Protected/Tolerant CAN
Transceivers for In-Car Applications
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