Differences between 5V and 3.3V Versions of AMIS-4168x

AND8369/D
Differences Between 5V
and 3.3V Version of CAN
LSFT
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AMIS has two versions of the CAN low speed fault tolerant transceiver, namely:
AMIS−41682 Full 5 V Version
APPLICATION NOTE
•
• AMIS−41683 Version with 3.3 V Interfacing Towards CAN Controller.
Both products are based on the same product specification and IP blocks. A detailed general block diagram applicable for
both versions is shown in Figure 1.
VBAT
INH
1
VCC
10
14
Vcc ( * )
POR
STB
EN
WAKE
Mode &
wake−up
−
control
5
6
9
7
11
Vcc ( * )
TxD
GND
ERR
Thermal
shutdown
Driver
control
12
8
2
Timer
RTL
CANH
CANL
RTH
13
4
Failure
handling
Receiver
Filter
3
RxD
AMIS −4168x
( * ) For AMIS−41682 pull up to Vcc .
For AMIS −41683 pull up to Vcc /2
ÏÏ
ÏÏ
ÏÏ
ÏÏ
ÏÏ
AMIS −41683
AMIS −41682
4
VCC
ERR
4
ERR
Failure
3
VCC
RxD
3
RxD
PC20050610
.3
© Semiconductor Components Industries, LLC, 2009
January, 2009 − Rev. 2
Failure
handling
handling
Figure 1. Block Diagrams
1
Publication Order Number:
AND8369/D
AND8369/D
More detailed drawings on the difference between these two versions are marked in the drawing below. They are
implemented purely by a partial metal−mask change of the same production mask−set. Parts of the silicon other than those
drawn in Figure 2 are identical for both products:
AMIS −41682
AMIS −41683
VCC
VCC
STB
STB
TxD
TxD
Vcc / 2
EN
Vcc / 2
EN
4
ERR
3
RxD
4
ERR
3
RxD
Figure 2. Differences in Digital Input and Output Stage Between AMIS−41682 and AMIS41683
TYPICAL APPLICATION DIAGRAMS
OUT
5V−reg
IN
VCC INH VBAT
10
1
14
CAN
controller
EN 6
ERR 4
STB
5
RxD
3
TxD 2
12
GND
* optional
11
4.7 kW
IN
5 V −reg
VBAT
4.7 kW
VCC
VCC INH
1
10
CANL
EN 6
ERR 4
STB
5
RxD
3
TxD 2
CANH
3.3V CAN
controller
8 RTH
GND
PC20050610.2
OUT
*
WAKE
7
9 RTL
AMIS−41683
13
IN
VBAT
*
VCC
OUT 3 .3 V −
reg
CAN BUS LINE
VBAT
14
12
AMIS−41682
11
GND
GND
PC20050610.1
Figure 3. Typical Application Diagrams
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2
CANL
CANH
8 RTH
13
* optional
WAKE
7
9
RTL
CAN BUS LINE
AND8369/D
Electrical Parameters
The characteristics listed in the following tables are the only ones that are specific for either version of the chip.
AMIS−41682 (5V version)
Table 1. CHARACTERISTICS OF AMIS−41682 (5 V VERSION)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
PINS STB−B, EN AND TXD
VIH
High−Level Input Voltage
0.7 x VCC
6.0
V
VIL
Low−Level Input Voltage
−0.3
0.3 x
VCC
V
I−PU−H
High−Level Input Current Pin TXD
TXD = 0.7 * VCC
−10
−200
mA
I−PU−L
Low−Level Input Current Pin TXD
TXD = 0.3 * VCC
−80
−800
mA
VCC − 0.9
VCC
V
PINS RXD AND ERR−B
VOH
High−Level Output Voltage
lsource = −1 mA
VOL
Low−Level Output Voltage
Isink = 1.6 mA
0
0.4
V
Isink = 7.5 mA
0
1.5
V
Max
Unit
6.0
V
AMIS−41683 (3.3 V VERSION)
Table 2. CHARACTERISTICS OF AMIS−41683 (3.3V VERSION)
Symbol
Parameter
Conditions
Min
Typ
PINS STB−B, EN AND TXD
VIH
High−Level Input Voltage
2
VIL
Low−Level Input Voltage
I−PU−H
High−Level Input Current Pin TXD
−0.3
TXD = 2 V
0.8
−10
V
mA
PINS RXD AND ERR−B
VOL
Low−Level Output Voltage Open
Drain
lsink = 3.2 mA
Ileak
Leakage When Driver is Off
VERR−B = VRXD = 5 V
BATTERY
+ 5V
ERR
STB
RxD
20 pF
TxD
VBAT
WAKE
14
7
9
6
4
5
12
AMIS −4168x
11
3
2
8
13
R1
C1
RTL
500W
EN
INH
1
10k W
CANL
C3
CANH
RTH
5 00 W
VCC
10
V
Common
R2
GND
10 k W
C2
Mode
voltage
PC20050511.1
Figure 4. Test Setup
All other characteristics can be found in the datasheet and are identical for both transceivers.
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3
0.4
V
1
mA
AND8369/D
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