Datasheet

MCP2551
DS21667D-page 10  2003 Microchip Technology Inc.
FIGURE 2-1: TEST CIRCUIT FOR ELECTRICAL CHARACTERISTICS
Bus Line (CANH; CANL) Receiver: [TXD = 2V; pins 6 and 7 externally driven]
D22 R
DIFF
Differential input resistance 20 100 kΩ
D24 I
LI
CANH, CANL input leakage
current
—150µAV
DD
< V
POR
;
V
CANH
= V
CANL
= +5V
Transmitter Data Input (TXD)
D25 V
IH
High-level input voltage 2.0 V
DD
V Output recessive
D26 V
IL
Low-level input voltage V
SS
+0.8 V Output dominant
D27 I
IH
High-level input current -1 +1 µA V
TXD
= V
DD
D28 I
IL
Low-level input current -100 -400 µA V
TXD
= 0V
Receiver Data Output (RXD)
D31 V
OH
High-level output voltage 0.7 V
DD
—VI
OH
= 8 mA
D32 V
OL
Low-level output voltage — 0.8 V I
OL
= 8 mA
Voltage Reference Output (V
REF
)
D33 V
REF
Reference output voltage 0.45 V
DD
0.55 V
DD
V-50µA < I
VREF
< 50 µA
Standby/Slope-Control (R
S
pin)
D34 V
STB
Input voltage for standby mode 0.75 V
DD
—V
D35 I
SLOPE
Slope-control mode current -10 -200 µA
D36 V
SLOPE
Slope-control mode voltage 0.4 V
DD
0.6 V
DD
V
Thermal Shutdown
D37 T
J
(sd)
Shutdown junction temperature 155 180
o
C
Note 1
D38 T
J
(h)
Shutdown temperature
hysteresis
20 30
o
C
-12V < V(
CANL
,
CANH
) < +12V
(Note 3)
2.2 DC Characteristics (Continued)
DC Specifications (Continued)
Electrical Characteristics:
Industrial (I): T
AMB
= -40°C to +85°C V
DD
= 4.5V to 5.5V
Extended (E):T
AMB
= -40°C to +125°C V
DD
= 4.5V to 5.5V
Param
No.
Sym Characteristic Min Max Units Conditions
Note 1: This parameter is periodically sampled and not 100% tested.
2: I
TXD
= I
RXD
= I
VREF
= 0 mA; 0V < V
CANL
< V
DD
; 0V < V
CANH
< V
DD
; V
RS
= V
DD
.
3: This is valid for the receiver in all modes; High-speed, Slope-control and Standby.
R
S
Rext
GND
RXD
V
REF
TXD
60 Ω
100 pF
30 pF
CANH
CANL
CAN
Transceiver
Note: R
S may be connected to VDD or GND via a load resistor depending on desired
operating mode as described in Section 1.7.8, “Slope Resistor Input (Rs)”.
0.1µF
V
DD