ST6208C STMicroelectronics, ST6208C Datasheet - Page 80
ST6208C
Manufacturer Part Number
ST6208C
Description
8 Bit ST6 Microcontroller with 1x8-bit TIMER
Manufacturer
STMicroelectronics
Datasheet
1.ST6209C.pdf
(104 pages)
Specifications of ST6208C
Clock Sources
crystal/ceramic resonator or RC network, external clock, backup oscillator (LFAO)
2 Power Saving Modes
Wait and Stop
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ST6208C/ST6209C/ST6210C/ST6220C
EMC CHARACTERISTICS (Cont’d)
10.7.3 ESD Pin Protection Strategy
To protect an integrated circuit against Electro-
Static Discharge the stress must be controlled to
prevent degradation or destruction of the circuit el-
ements. The stress generally affects the circuit el-
ements which are connected to the pads but can
also affect the internal devices when the supply
pads receive the stress. The elements to be pro-
tected must not receive excessive current, voltage
or heating within their structure.
An ESD network combines the different input and
output ESD protections. This network works, by al-
lowing safe discharge paths for the pins subjected
to ESD stress. Two critical ESD stress cases are
presented in
pins.
Figure 59. Positive Stress on a Standard Pad vs. V
Figure 60. Negative Stress on a Standard Pad vs. V
80/104
1
Main path
Path to avoid
Main path
Figure 59
V
V
V
V
DD
DD
SS
SS
and
Figure 60
(3a)
(3b)
(3a)
(3b)
for standard
OUT
OUT
SS
Standard Pin Protection
To protect the output structure the following ele-
ments are added:
– A diode to V
– A protection device between V
To protect the input structure the following ele-
ments are added:
– A resistor in series with the pad (1)
– A diode to V
– A protection device between V
DD
(4)
(4)
IN
IN
DD
DD
(3a) and a diode from V
(2a) and a diode from V
(2a)
(2b)
(2a)
(2b)
(1)
(1)
DD
DD
and V
and V
SS
SS
SS
SS
V
V
V
V
(3b)
(2b)
(4)
(4)
DD
SS
DD
SS
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