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NXP Semiconductors
UM11379
UJA116xA evaluation boards
2.3 CAN communication circuitry
The UJA116xA evaluation boards contain typical CAN communication circuitry. The
CANH and CANL bus signals are output on connector J1.
UJA116xA
UJA116xA-EVB
CANH (pin 13)
J1-01: connect to HIGH-level CAN bus line
CANL (pin 12)
J1-02: connect to LOW-level CAN bus line
Table 8. CAN bus line connections
Equipped with termination resistors R2 and R3, the UJA116xA evaluation boards are
pre-prepared to be used as termination nodes in a CAN network. If the CAN network is
already terminated at both ends, it is recommended to remove R2 and R3 or replace
them with higher value resistors to ensure that the impedance on the bus meets the CAN
bus load specification, typically 60 Ω.
aaa-040310
UJA116xA
CANH(p13)
CANL(p12)
L1
100 µH
R3
62 Ω
C4
4.7 nF
C6
51 pF
D3
PESD1CAN
CANH
CANL
J1
C5
51 pF
capacitors
split
termination
common-mode
choke
ESD
protection
diodes
R2
62 Ω
Figure 7. CAN bus interface circuitry (relevant for the entire UJA116xA-EVB family)
UM11379
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© NXP B.V. 2021. All rights reserved.
User manual
Rev. 1 — 23 April 2021
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