MLX80020 Datasheet, PDF (14/26 Pages) Melexis Microelectronic Systems – Enhanced LIN Transceiver

MLX80020
Enhanced LIN Transceiver
Data transmission speed
The MLX80020 is a constant slew rate transceiver that means the bus driver operates with a fixed slew rate
range independent of the supply voltage. This principle secures a very good symmetry of the slope times
between recessive to dominant and dominant to recessive slopes within the LIN bus load range (C_BUS, R_term).
The MLX80020 KDC A version guarantees data rates up to 20kbd within the complete bus load range under
worst case conditions.
The version MLX80020 KDC B is optimized for applications with a maximum baud rate of 10.4kBd (SAE
J2602) in order to minimize EME. These devices can not be used in applications with higher baud rates.
The constant slew rate principle is very robust against voltage drops and can operate with RC- oscillator
systems with a clock tolerance up to ±2% between 2 nodes.
Duty cycle calculation LIN 2.x
With the timing parameters shown in the picture below two duty cycles , based on t_rec(min) and
t_rec(max) can be calculated as follows : t_Bit =50µs
D1 = t_rec(min) / (2 x t_Bit)
D2 = t_rec(max) / (2 x t_Bit)
Figure 4 - Duty cycle measurement and calculation in accordance to LIN physical layer specification
2.x for baud rates up to 20Kbps
MLX80020 – Datasheet
3901080020
Page 14 of 26
November 2015
Rev 006