Can Communication Circuitry - NXP Semiconductors UJA1169A User Manual

NXP Semiconductors

2.3 CAN communication circuitry

UM11758
User manual
The UJA1169Ax-EVB evaluation boards contain typical CAN communication circuitry.
The CANH and CANL bus signals are output on connector J1.
Table 6. CAN bus line connections
UJA1169A
CANH (pin 18)
CANL (pin 17)
Equipped with termination resistors R2 and R3, the UJA1169Ax-EVB evaluation boards
are configured 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.
CANH(p18)
UJA1169A
100 µH
CANL(p17)
Figure 10. CAN bus interface circuitry (relevant for the entire UJA1169A-EVB family)
All information provided in this document is subject to legal disclaimers.
UJA1169Ax-EVB
J1-01: connect to HIGH-level CAN bus line
J1-02: connect to LOW-level CAN bus line
R3
62 Ω
L1
C4
R2
4.7 nF
62 Ω
common-mode split
choke termination
Rev. 1 — 19 April 2022
UM11758
UJA1169A evaluation boards
D3
PESD1CAN
ESD protection diodes
aaa-045540
© NXP B.V. 2022. All rights reserved.
J1
CANH
CANL
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