2470
BUS DRIVER / RECEIVER
DISCONTINUED PRODUCT
-- FOR REFERENCE ONL
Y
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
BUS DRIVER / RECEIVER
FUNCTIONAL BLOCK DIAGRAM
R
d
R
d
T
d
GND
V
CC
V
S
R
EXT
BUS
6
5
4
7
2
1
3
8
CURRENT
LIMIT
22 k
12
25
28 V
Data Sheet
27463
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.
Dwg. FP-039
FEATURES AND BENEFITS
s Over-Voltage Protection
s Diode Isolation from both Ground and Supply
s Reverse-Battery Protection
s Low Supply Current
s High Noise Immunity
s Output Current Limiting
s Low Standby Current--24 mA Max.
s Open-Ground Protection
s Under-Voltage Lockout
2470
ULQ2470M
1
2
3
4
5
6
7
8
R
d
R
d
T
d
GND
V
CC
V
S
R
EXT
BUS
Dwg. PP-061
Note that the ULQ2470M (DIP) and the ULQ2470L
(SOIC) are electrically identical and share a
common terminal number assignment.
2470
BUS DRIVER / RECEIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ULQ2470L
Dimensions in Inches
(for reference only)
Dimensions in Millimeters
(controlling dimensions)
0
TO
8
0.1968
0.1890
0.2440
0.2284
0.050
0.016
Dwg. MA-007-8 in
0.050
BSC
0.0098
0.0075
8
1
0.1574
0.1497
0.020
0.013
0.0688
0.0532
0.0040
MIN.
Copyright 1995, Allegro MicroSystems, Inc.
0
TO
8
5.00
4.80
6.20
5.80
1.27
0.40
Dwg. MA-007-8 mm
1.27
BSC
0.25
0.19
8
1
4.00
3.80
0.51
0.33
1.75
1.35
0.10
MIN.
NOTES: 1. Lead spacing tolerance is non-cumulative.
2. Exact body and lead configuration at vendor's option within limits shown.
2470
BUS DRIVER / RECEIVER
NOTES: 1. Leads 1, 4, 5, and 8 may be half leads at vendor's option.
2. Lead thicjkness is measured at seating plane or below.
3. Lead spacing tolerance is non-cumulative.
4. Exact body and lead configuration at vendor's option within limits shown.
ULQ2470M
Dimensions in Inches
(controlling dimensions)
Dimensions in Millimeters
(for reference only)
0.014
0.008
0.300
BSC
Dwg. MA-001-8A in
0.430
MAX
4
0.100
BSC
5
8
1
0.022
0.014
0.400
0.355
0.005
MIN
0.150
0.115
0.280
0.240
0.210
MAX
0.070
0.045
0.015
MIN
0.355
0.204
7.62
BSC
Dwg. MA-001-8A mm
10.92
MAX
4
10.16
9.02
2.54
BSC
0.13
MIN
3.81
2.93
5
8
1
7.11
6.10
5.33
MAX
1.77
1.15
0.39
MIN
0.558
0.356
2470
BUS DRIVER / RECEIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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.
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