1. General description
The TJA1102 is a 100BASE-T1 compliant dual-port Ethernet PHY optimized for
automotive use cases such as gateways, IP camera links, driver assistance systems and
back-bone networks. The device provides 100 Mbit/s transmit and receive capability over
two unshielded twisted-pair cables, supporting a cable length of up to at least 15 m. The
TJA1102 has been designed for automotive robustness, while minimizing power
consumption and system costs. For added flexibility, a single PHY version is available
(TJA1102S) in which one of the PHYs is disabled.
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2. Features and benefits
2.1 General
Dual-port 100BASE-T1 PHY
Single-port operation possible
MII- and RMII-compliant interfaces to the bus
HVQFN 56-pin package (
8 8mm)
2.2 Optimized for automotive use cases
Transmitter optimized for capacitive coupling to unshielded twisted-pair cable
Adaptive receive equalizer optimized for automotive cable length of up to at least 15 m
Enhanced integrated PAM-3 pulse shaping for low RF emissions
EMC-optimized output driver strength for MII and RMII
MDI pins protected against transients in automotive environment
MDI pins do not need external filtering or ESD protection
Automotive-grade temperature range from 40 C to +125 C
Automotive product qualification in accordance with AEC-Q100
2.3 Low-power mode
Dedicated PHY enable/disable input pin to minimize power consumption
Inhibit output for voltage regulator control
OPEN Alliance-compliant wake-up concept (global wake-up support)
Robust remote wake-up detection via bus lines
Wake-up forwarding on PHY level
OPEN Alliance-compliant sleep concept
TJA1102
100BASE-T1 dual/single PHY for automotive Ethernet
Rev. 1 — 1 November 2017 Product short data sheet
