Datasheet

9
TJA1102/TJA1102S TRANSCEIVER USE CASES
SJA1105x
TJA1102
TJA1102/S
MCU
e.g., i.MX
1
2
3
4
5
WUP pulses
WUR codes
WUP pulses
V
BAT
INH
WUP_detect
MACs + Switch
µController
PHY
PHY
PHY
1.2 V
3.3 V
TJA1102
MCU
e.g., i.MX
SJA1105x
1
2
3
4
5
P1T1
PHY
e.g., TJA1101
ECU2
M
S
S
M
ECU1
PHY
e.g., TJA1101
ECU3
P2T2
P1
P2
SJA1105x
TJA1102
TJA1102/S
MCU
e.g., i.MX
1
2
3
4
5
WUP pulses
WUR codes
WUP pulses
V
BAT
INH
WUP_detect
MACs + Switch
µController
PHY
PHY
PHY
1.2 V
3.3 V
TJA1102
MCU
e.g., i.MX
SJA1105x
1
2
3
4
5
P1T1
PHY
e.g., TJA1101
ECU2
M
S
S
M
ECU1
PHY
e.g., TJA1101
ECU3
P2T2
P1
P2
SJA1105x
TJA1102
TJA1102/S
MCU
e.g., i.MX
1
2
3
4
5
WUP pulses
WUR codes
WUP pulses
V
BAT
INH
WUP_detect
MACs + Switch
µController
PHY
PHY
PHY
1.2 V
3.3 V
TJA1102
MCU
e.g., i.MX
SJA1105x
1
2
3
4
5
P1T1
PHY
e.g., TJA1101
ECU2
M
S
S
M
ECU1
PHY
e.g., TJA1101
ECU3
P2T2
P1
P2
SMALLEST AREA AND HIGHEST FLEXIBILITY
• The TJA1102 transceiver has a pin-to-pin compatible
single PHY variant, the TJA1102S, which gives the car
OEM/Tier-1 the opportunity to scale up or down the
port count without redesigning the PCB
• >30% area saving with TJA1102 compared to a 2x
single port PHY solution
PARTIAL NETWORKING
• TJA1102 and TJA1101 enable self-contained sleep
and wake-up signaling over data line
• The wake-up forwarding function allows fast signal
propagation without intervention of a switch, MAC or
μC
• The wake-up can be forwarded via non-active links
(blue PHYs in the figure) but also active links (green
PHY in the figure)
• Saves an additional wake-up line
REPEATER MODE
• The TJA1102 transceiver supports internal reverse
MII to operate the device in Repeater Mode
• Example applications:
– ECU2 and ECU3 can quickly start to communicate
ahead of MCU/switch boot up on ECU1
– Fall-back mode for security purposes, bypassing
the switch
– Duplicate max cable length up to 30 m
Ethernet PHY Transceivers