Datasheet
TJA1085 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 23 October 2012 5 of 61
NXP Semiconductors
TJA1085
FlexRay active star coupler
[1] IO: input/output; O: output; I: input; P: power supply; G: ground.
[2] GND1, GND2, GNDD and the exposed center pad of HVQFN44 package must be connected together on
the PCB; references in the data sheet to GND can be assumed to encompass GND1, GND2, GNDD and
the exposed center pad of HVQFN4 unless stated otherwise.
[3] V
BUF1
and V
BUF2
must be connected together on the PCB; note that references in the data sheet to V
BUF
can be assumed to encompass V
BUF1
and V
BUF2
unless stated otherwise.
[4] V
CC1
and V
CC2
must be connected together on the PCB; note that references in the data sheet to V
CC
can
be assumed to encompass V
CC1
and V
CC2
unless stated otherwise.
[5] References in the data sheet to BM (e.g. pin BM or V
BM
) can be assumed to encompass BM_1, BM_2,
BM_3 and BM_4 unless stated otherwise.
[6] References in the data sheet to BP (e.g. pin BP or V
BP
) can be assumed to encompass BP_1, BP_2, BP_3
and BP_4 unless stated otherwise.
LWU 16 I local wake-up input; internal pull-up or pull-down (depends on
voltage at pin LWU)
V
BAT
17 P battery supply voltage
n.c. 18 - not connected; to be connected to GND in application
GND2 19 G ground connection for branches 3 and 4
[2]
n.c. 20 - not connected; to be connected to GND in application
V
BUF2
21 P buffer supply voltage for branches 3 and 4
[3]
V
CC2
22 P supply voltage for branches 3 and 4
[4]
BM_4 23 IO bus line minus for branch 4
[5]
BP_4 24 IO bus line plus for branch 4
[6]
n.c. 25 - not connected; to be connected to GND in application
BM_3 26 IO bus line minus for branch 3
[5]
BP_3 27 IO bus line plus for branch 3
[6]
n.c. 28 - not connected; to be connected to GND in application
BM_2 29 IO bus line minus for branch 2
[5]
BP_2 30 IO bus line plus for branch 2
[6]
n.c. 31 - not connected; to be connected to GND in application
BM_1 32 IO bus line minus for branch 1
[5]
BP_1 33 IO bus line plus for branch 1
[6]
V
CC1
34 P supply voltage for branches 1 and 2
[4]
V
BUF1
35 P buffer supply voltage for branches 1 and2
[3]
n.c. 36 - not connected; to be connected to GND in application
GND1 37 G ground connection for branches 1 and 2
[2]
RES6 38 - reserved; to be connected to GND in application
RES5 39 - reserved; to be connected to GND in application
RES4 40 - reserved; to be connected to GND in application
RES3 41 - reserved; to be connected to GND in application
RES2 42 - reserved; to be connected to GND in application
RES1 43 - reserved; to be connected to GND in application
RSTN 44 I reset input; internal pull-up
Table 2. Pin description
…continued
Symbol Pin Type
[1]
Description