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AS8222 Datasheet(PDF) 14 Page - ams AG

Part # AS8222
Description  Enhanced FlexRay Standard Transceiver
PDF  43 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS8222 Datasheet(HTML) 14 Page - ams AG

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AS8222
Datasheet - Electrical Character i s t ics
www.ams.com/eng/FlexRay/AS8222
Revision 1.0
13 - 42
6.5 Wake-up Detector
The following parameters are applicable to all the branch wake-up detectors.
tbit
Bit time
CRXD=15 pF
2
60
ns
tRxD_ASYM
dRxAsym
Delay time from BUS to RxD mismatch
Receiver delay mismatch
| dBDRx10 – dBDRx01 |
CRXD=15 pF,
tBUS_RxD10- tBUS_RxD01
2
05
5
ns
ns
tRXDfall
dRxSlope
Fall time RxD voltage
Fall and rise time 20%-80%, 15pF load
80 % - 20 % of VRXDL;CRXD=15 pF
2
25
5
ns
ns
tRXDrise
dRxSlope
Rise time RxD voltage
Fall and rise time 20%-80%, 15pF load
20 % - 80 % of VRXDL;CRXD=15 pF
2
25
5
ns
ns
tBUSIdleDetection
dIdleDetection
Idle detection time
Filter-time for idle detection
VBUS: 400mV
→ 0
50
50
150
250
250
ns
ns
tBUSActivityDetection
dActivityDetectio
n
Activity detection time
Filter-time for activity detection
VBUS: 0 V
→ 400 mV
100
100
200
300
300
ns
ns
tBUSIdleReaction
dBDRxai
Idle reaction time
Idle reaction time
VBUS: 400mV
→ 0
50
50
160
300
400
ns
ns
tBUSActivityReaction
dBDRxia
Activity reaction time
Activity reaction time
VBUS: 0 V
→ 400 mV
100
100
210
350
450
ns
ns
1. Test condition: (VBP + VBM) / 2 = 2,5V ± 5%
2. For test signal see Figure 13
Table 7. Wake-up Detector
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VBAT_BW
VBAT voltage supply for bus wake-up
In case a VBAT supply voltage input is
implemented, the wake-up detector
shall be operable when uVBAT is equal
to or greater than 7V even if other
supplies are not present.
6.5
40
V
tBWU0
dWU0Detect
Data_0 detection time in remote wake-
up pattern
Acceptance timeout for detection of a
Data_0 phase in wake-up pattern
-10V<(VBP, VBM)<15V
1
1
24
4
µs
µs
Table 6. Receiver
Symbol
Parameter
Conditions
Min
Typ
Max
Units



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