AMIS-42770 Dual High-Speed CAN Transceiver
For Long Networks
Data Sheet
Table 6: DC and Timing Characteristics (Continued)
Symbol
Thermal Shutdown
Tj(sd) Shutdown junction temperature
Parameter
Conditions
Min.
Typ.
Max.
Unit
150
°C
Timing Characteristics (see Figure 8: Test Circuit for Timing Characteristics and Figure 9: Timing Diagram for AC Characteristics)
td(Tx-BUSon)
td(Tx-BUSoff)
td(BUSon-RX)
td(BUSoff-RX)
td(ENxB)
Delay Tx0/Text to bus active
Delay Tx0/Text to bus inactive
Delay bus active to Rx0/Rint
Delay bus inactive to Rx0/Rint
Delay from EN1B to bus active/inactive
Delay from Tx0 to Rx0/Rint and from Text to
Rx0 (direct logical path)
40
30
25
65
85
60
55
100
100
120
115
115
145
200
ns
ns
ns
ns
ns
td(Tx-Rx)
tdom
15pF on the digital output
4
10
25
35
45
ns
ms
ns
Time out counter interval
15
5+
td(BUSon-RX)
td(FBS)
Delay for feedback suppression release
300
8.5 Measurement Set-ups and Definitions
Schematics are given for single CAN transceiver.
+5V
100 nF
VCC
Vref
1 nF
1 nF
CANH1
12
8
13
Text
Rint
Transient
Generator
3
9
CANL1
CANH2
14
19
AMIS-42770
Tx0
4
7
Rx0
CANL2
18
2
10
17 16 15
6
5
GND
PC20071011.8
EN1
EN2
Figure 6: Test Circuit for Automotive Transients
VRxD
High
Low
Hysteresis
PC20040829.7
0,9
0,5
Vi(dif)(hys)
Figure 7: Hysteresis of the Receiver
AMI Semiconductor – October 2007, Rev. 1.0
www.amis.com Specifications subject to change without notice
11
AMI [ AMI SEMICONDUCTOR ]
