Sierra Wireless HL7748 사용자 설명서
41110555
Rev 1.0
September 21, 2017
42
Product Technical Specification
Design Guidelines
5.8.
ESD Guidelines for USB
When the USB interface is externally accessible, it is required to have ESD protection on the USB_D+
and USB_D- signals.
and USB_D- signals.
Figure 16.
ESD Protection for USB
Sierra Wireless recommends using the following components:
•
FIL400: 90
Ω
DLP0NSN900HL2L EMC filter
•
D400: RCLAMP0503N or ESD5V3U2U-03LRH ESD diode
5.9.
PWM
Refer to the following figures for examples of using the PWM0 signal for driving an LED or a BUZZER.
Figure 17.
Example of an LED Driven by the PWM0 Output
The value of R607 can be harmonized depending on LED (D605) characteristics.
The recommended digital transistor to use for T601 is the DTC144EE from ROHM.