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L9637D Datasheet(PDF) 6 Page - STMicroelectronics |
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L9637D Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 11 page LI LO TX K RX t d t ON LI - L O t d t ON TX - K OF F a c tiv e a c t iv e OF F Figure 3: Typical timing for mode transitions. Supressing all 4 classes of ”Schaffner” signals all pins can be load with short energy pulses of max. ±0.2mJ. All these features together with a high possible baud rate >50Kbaud, controlled output slopes for low EMI, a wide power supply voltage range and a very small quiescent current during OFF (TX LI K=High) condition ISoff typ ≤ 120µA, and a real standby function with zero power con- sumption ISSB typ ≤ 1µA during system depower- ing VCC ≤ 0.5V make this device high efficient for automotive bus system. After wake up of the system from OFF or SB condition the first output signal will have an addi- tional delay time tdtyp ≤ 5µs see also Fig. 3. The typical output voltage behaviour for the K, LO, RX outputs as a function of the output current is shown in Fig.4. Fig.5 shows a waveform of the output signal when the low level changes from RON *IOUT to IOUT *2 * RON +UBE state. This vari- ation occurs due to too low output current or after a negative transient forced to the output or to the supply voltage line. L9637 6/11 |
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