PCA89C250 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 06 — 25 August 2011 4 of 18
NXP Semiconductors
PCA82C250
CAN controller interface
LOW level. The microcontroller should react to this condition by switching the transceiver
back to normal operation (via pin 8). Because the receiver is slow in Standby mode, the
first message will be lost.
[1] X = don’t care.
9. Limiting values
[1] In accordance with “IEC 60747-1”. An alternative definition of virtual junction temperature is:
T
vj
=T
amb
+P
d
R
th(vj-a)
, where R
th(j-a)
is a fixed value to be used for the calculation of T
vj
. The rating for T
vj
limits the allowable combinations of power dissipation (P
d
) and ambient temperature (T
amb
).
[2] Classification A: human body model; C = 100 pF; R = 1500 ; V = 2000 V.
[3] Classification B: machine model; C = 200 pF; R = 25 ; V = 200 V.
Table 4. Truth table of the CAN transceiver
Supply TXD CANH CANL Bus state RXD
4.5 V to 5.5 V 0 HIGH LOW dominant 0
4.5 V to 5.5 V 1 (or floating) floating floating recessive 1
< 2 V (not powered) X
[1]
floating floating recessive X
[1]
2V<V
CC
< 4.5 V >0.75V
CC
floating floating recessive X
[1]
2V<V
CC
<4.5V X
[1]
floating if
V
Rs
>0.75V
CC
floating if
V
Rs
> 0.75V
CC
recessive X
[1]
Table 5. Pin Rs summary
Condition forced at pin Rs Mode Resulting voltage or current at pin Rs
V
Rs
>0.75V
CC
Standby I
Rs
< 10 A
10 A<I
Rs
< 200 A Slope control 0.4V
CC
<V
Rs
<0.6V
CC
V
Rs
<0.3V
CC
High-speed I
Rs
< 500 A
Table 6. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are referenced
to pin 2; positive input current.
Symbol Parameter Conditions Min Max Unit
V
CC
supply voltage 0.3 +9.0 V
V
n
DC voltage at pins 1, 4, 5 and 8 0.3 V
CC
+0.3 V
V
6, 7
DC voltage at pins 6 and 7 0 V < V
CC
<5.5V;
no time limit
8.0 +18.0 V
V
trt
transient voltage at pins 6 and 7 see Figure 8 150 +100 V
T
stg
storage temperature 55 +150 C
T
amb
ambient temperature 40 +125 C
T
vj
virtual junction temperature
[1]
40 +150 C
V
esd
electrostatic discharge voltage
[2]
2000 +2000 V
[3]
200 +200 V