ISP1105/1106
Advanced USB transceivers
8. Electrostatic discharge (ESD)
8.1 ESD protection
The pins that are connected to the USB connector (D+, D−, VCC(5.0) and GND) have a
minimum of ±12 kV ESD protection. The ±12 kV measurement is limited by the test
equipment. Capacitors of 4.7 μF connected from Vreg(3.3) to GND and VCC(5.0) to GND are
required to achieve this ±12 kV ESD protection (see Figure 6).
R
1 MΩ
R
D
1500 Ω
C
charge current
limit resistor
discharge
resistance
DEVICE UNDER
TEST
V
CC(5V0)
A
B
VREG3V3
HIGH VOLTAGE
DC SOURCE
storage
capacitor
C
S
4.7 μF
4.7 μF
100 pF
GND
004aaa145
Fig 6. Human Body ESD test model.
8.2 ESD test conditions
A detailed report on test set-up and results is available on request.
ISP1105_1106_10
© ST-ERICSSON 2009. All rights reserved.
Product data sheet
Rev. 10 — 28 September 2009
10 of 25
ERICSSON [ ERICSSON ]
