Can Communication Circuitry - NXP Semiconductors UJA116 A Series User Manual

NXP Semiconductors

2.3 CAN communication circuitry

UM11379
User manual
The UJA116xA evaluation boards contain typical CAN communication circuitry. The
CANH and CANL bus signals are output on connector J1.
Table 8. CAN bus line connections
UJA116xA
CANH (pin 13)
CANL (pin 12)
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.
CANH(p13)
UJA116xA
100 µH
CANL(p12)
Figure 7. CAN bus interface circuitry (relevant for the entire UJA116xA-EVB family)
All information provided in this document is subject to legal disclaimers.
UJA116xA-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 — 23 April 2021
UJA116xA evaluation boards
D3
PESD1CAN
C6 C5
51 pF 51 pF
capacitors ESD
protection
diodes
UM11379
J1
CANH
CANL
aaa-040310
© NXP B.V. 2021. All rights reserved.
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