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
°
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
°
C to +85
°
C
Junction Temperature Range,
T
J
................................
-40
°
C to 150
°
C
Storage Temperature Range,
T
S
................................
-65
°
C to 150
°
C
D
C
E
N
U
E
N
ER
I
T
F
N
E
O
R
C
R
IS
FO
D
R
d
1
T
C
U
Y
D
L
O
N
R
O
P
E
8
V
CC
7
V
S
22 kΩ
6
R
EXT
BUS
R
d
2
12
Ω
5
T
d
3
CURRENT
LIMIT
28 V
25
Ω
4
GND
Dwg. FP-039
—
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—24 mA Max.
Open-Ground Protection
Under-Voltage Lockout
2470
BUS DRIVER / RECEIVER
ULQ2470L
Dimensions in Inches
(for reference only)
8
0.0098
0.0075
0.1574
0.1497
0.2440
0.2284
0.050
0.016
0.020
0.013
1
0.1968
0.1890
0.050
BSC
0°
TO
8°
0.0688
0.0532
0.0040
MIN.
Dwg. MA-007-8 in
Dimensions in Millimeters
(controlling dimensions)
8
0.25
0.19
6.20
5.80
4.00
3.80
1.27
0.40
0.51
0.33
1
5.00
4.80
1.27
BSC
0°
TO
8°
1.75
1.35
0.10
MIN.
Dwg. MA-007-8 mm
NOTES: 1. Lead spacing tolerance is non-cumulative.
2. Exact body and lead configuration at vendor’s option within limits shown.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1995, Allegro MicroSystems, Inc.
2470
BUS DRIVER / RECEIVER
ULQ2470M
Dimensions in Inches
(controlling dimensions)
0.014
0.008
8
5
0.430
0.280
0.240
MAX
0.300
BSC
1
0.070
0.045
4
0.005
0.400
0.355
MIN
0.210
MAX
0.015
MIN
0.150
0.115
0.022
0.014
0.100
BSC
Dwg. MA-001-8A in
Dimensions in Millimeters
(for reference only)
0.355
0.204
8
5
10.92
7.11
6.10
MAX
7.62
BSC
1
1.77
1.15
4
0.13
10.16
9.02
MIN
5.33
MAX
0.39
MIN
3.81
2.93
0.558
0.356
2.54
BSC
Dwg. MA-001-8A mm
NOTES: 1.
2.
3.
4.
Leads 1, 4, 5, and 8 may be half leads at vendor’s option.
Lead thicjkness is measured at seating plane or below.
Lead spacing tolerance is non-cumulative.
Exact body and lead configuration at vendor’s option within limits shown.
2470
BUS DRIVER / RECEIVER
Allegro MicroSystems, Inc. reserves the right to make,
from time to time, such departures from the detail specifica-
tions as may be required to permit improvements in the
design of its products.
The information included herein is believed to be
accurate and reliable. However, Allegro MicroSystems, Inc.
assumes no responsibility for its use; nor for any infringe-
ments of patents or other rights of third parties which may
result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
FPGA/CPLD
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