2470
BUS DRIVER / RECEIVER
2470
BUS DRIVER / RECEIVER
The ULQ2470L and ULQ2470M are bi-directional bus driver /
receivers designed specifically for automotive applications. They are
intended to be used as an interface between a microprocessor and a
single-wire multiplex data bus operating from the A-line or battery.
Each device consists of a wave-shaped open-collector driver, a pull-up
resistor, and an input filter and buffer.
Output driver protection circuitry provides output shutdown if
currents in excess of 25 to 30 mA occur. Additionally, over-voltage
shutdown occurs when the bus voltage exceeds approximately
22 volts.
Data Sheet
27463
ULQ2470M
V
CC
V
S
R
EXT
BUS
R
d
R
d
T
d
GND
1
2
3
4
8
7
6
5
FUNCTIONAL BLOCK DIAGRAM
Dwg. PP-061
Note that the ULQ2470M (DIP) and the ULQ2470L
(SOIC) are electrically identical and share a
common terminal number assignment.
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25
擄
C
Bus Supply Voltage Range,
(V
BAT
) .........................
-13.5 V to 27 V
Logic Supply Voltage Range,
(V
CC
) ............................
-0.3 V to 9.0 V
Input Voltage Range,
(V
BUS
) ...........................
-3.0 V to 24 V
Operating Temperature Range,
T
A
...............................
-40
擄
C to +85
擄
C
Junction Temperature Range,
T
J
................................
-40
擄
C to 150
擄
C
Storage Temperature Range,
T
S
................................
-65
擄
C to 150
擄
C
D
C
E
N
U
E
N
ER
I
T
F
N
E
O
R
C
R
S
O
I
F
D
R
d
1
T
C
U
Y
D
L
O
N
R
O
P
E
8
V
CC
7
V
S
22 k鈩?/div>
6
R
EXT
BUS
R
d
2
12
鈩?/div>
5
T
d
3
CURRENT
LIMIT
28 V
25
鈩?/div>
4
GND
Dwg. FP-039
鈥?/div>
FEATURES AND BENEFITS
s
s
s
s
s
s
s
s
s
Over-Voltage Protection
Diode Isolation from both Ground and Supply
Reverse-Battery Protection
Low Supply Current
High Noise Immunity
Output Current Limiting
Low Standby Current鈥?4 mA Max.
Open-Ground Protection
Under-Voltage Lockout
1
2
3
4
