AS8221
Data Sheet - Electrical Characteristics
Table 3. Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Units
20% - 80% of VRxD;
CRxD=15 pF
tRxD_RISE
Rise time RxD voltage
2
5
ns
(see footnote 3)
VBUS: 400mV → 0V
VBUS: 0V → 400mV
VBUS: 400mV → 0V
tBUSIdleDetection
tBUSActivityDetection
tBUSIdleReaction
Idle detection time
Activity detection time
Idle reaction time
50
100
50
173
173
192
200
200
250
300
350
ns
ns
ns
ns
tBUSActivityReaction
Wake-Up Detector
VBUS: 0V → 400mV
Activity reaction time
100
Data0 detection time in remote
wake-up pattern
tBWU_D0
tBWU_Idle
tBWU_Detect
VBWUTH
-10V < (VBP, VBM) < 15V
-10V < (VBP, VBM) < 15V
1
1
2
2
4
4
µs
µs
Idle or Data1 detection time in
remote wake-up pattern
Total remote wake-up detection
time
-10V < (VBP, VBM) < 15V
-10V < (VBP, VBM) < 15V
48
-300
2
73
-250
2.8
140
-150
4
µs
mV
V
Bus wake-up detection threshold
Local wake-up detection
threshold
VLWUTH
VBAT = 12V; VLWAKE = 2V for
Low level input current on local
WAKE pin
ILWUL
ILWUH
-20
-10
-5
µA
t < tLWUFilter
VBAT = 12V; VLWAKE = 4V for
High level input current on local
WAKE pin
5
1
11
20
20
40
µA
µs
t < tLWUFilter
tLWUFilter
Local wake filter time
Supply Voltage Monitor
VBAT undervoltage recovery
VBATTHH
VBATTHL
VCCTHH
VCCTHL
3.5
2.5
4
3
4.5
3.5
4.5
3.5
2.0
1.5
700
5
V
V
threshold
VBAT undervoltage detection
threshold
VCC under-voltage recovery
3.5
4
V
threshold
VCC undervoltage detection
2.5
3
V
threshold
VIO undervoltage recovery
VIOTHH
1.25
0.75
100
0.7
1.6
1.1
300
2
V
threshold
VIO undervoltage detection
VIOTHL
V
threshold
Detection time for undervoltage
tUV_DETECT
ms
ms
at VBAT, VCC, VIO
Detection time for undervoltage
recovery at VBAT, VCC, VIO
tUV_REC
Bus Error Detection
ITHL
Absolute bus current for low
current detection
NORMAL mode, Transmitter
enabled
5
mA
mA
Absolute bus current for high
current detection
NORMAL mode, Transmitter
enabled
ITHH
40
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