ALLEGRO UDN2985

Data Sheet
29310.2A†
2985
8-CHANNEL SOURCE DRIVER
1
18
2
17
3
16
4
15
5
14
6
13
7
12
8
11
VS
GND
Recommended for applications requiring separate logic and load grounds,
load supply voltages to 30 V, and load currents to 250 mA, the UDN2985A
source driver is used as an interface between standard low-power digital logic
and LEDs, relays, and solenoids. The outputs feature saturated transistors for
low collector-emitter saturation voltages.
The UDN2985A driver is for use with 5 V logic systems: TTL, Schottky
TTL, DTL, and CMOS. This device has a minimum output breakdown rating
of 30 V with a minimum output sustaining voltage of 15 V. The output is
switched on by an active-high input level.
Under normal operating conditions, this device can source up to 120 mA
for each of the eight outputs at an ambient temperature of 75°C and a supply
voltage of 15 V. It incorporates input current-limiting resistors and output
transient-suppression diodes.
The UDN2985A source driver is supplied in an 18-pin dual in-line
package. All inputs are on one side of the package, output pins on the other,
to simplify printed wiring board layout.
Dwg. No. A-10,243
FEATURES
ABSOLUTE MAXIMUM RATINGS
at TA = 25°C
Driver Supply Voltage, VS .................. 30 V
Continuous Output Current,
IOUT ........................................ -250 mA
■
■
■
■
■
TTL, DTL, or CMOS Compatible Inputs
250 mA Output Source Current Capability
Output Transient-Suppression Diodes
30 V Minimum Output Breakdown Voltage
Low Output-Saturation Voltage
PARTIAL SCHEMATIC DIAGRAM
1 of 8 DRIVERS
Input Voltage, VIN ............................... 20 V
Package Power Dissipation,
PD .............................................. 2.2 W*
Operating Temperature Range,
TA ............................... -20°C to +85°C
Storage Temperature Range,
TS ............................... -55°C to +150°C
*Derate at the rate of 18 mW/°C above
TA= 25°C.
Dwg. No. DS-1013
Always order by complete part number: UDN2985A .
2985
8-CHANNEL
SOURCE DRIVER
ELECTRICAL CHARACTERISTICS at TA = 25°C, VS = 30 V (unless otherwise noted).
Limits
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Output Leakage Current
ICEX
VIN = 0.4 V, VOUT = 0 V
—
<-1.0
-100
µA
Output Sustaining Voltage
VCE(sus)
lOUT = -120 mA, L = 3 mH
15
—
—
V
Output Saturation Voltage
VCE(SAT)
VIN = 2.4, lOUT = -60 mA
—
0.8
1.1
V
VIN = 2.4, lOUT = -120 mA
—
0.9
1.2
V
VIN = 2.4 V
—
90
225
µA
VIN = 5.0 V
—
280
650
µA
IIN(OFF)
VIN = 0.4 V
—
10
15
µA
Supply Current
(outputs open)
IS
VS = 30 V, VIN = 2.4 V
—
10
15
mA
Clamp Diode
Leakage Current
IR
VR = 30 V, TA = 70°C
—
<1.0
50
µA
Clamp Diode
Foward Voltage
VF
IF = 120 mA
—
1.1
2.0
V
Turn-On Delay
tON
—
0.5
1.0
µs
Turn-Off Delay
tOFF
—
5.0
10
µs
Input Current Voltage
IIN(ON)
NOTE: Negative current is defined as coming out of (sourcing) the specified device pin.
COMMON-CATHODE LED DRIVER
Dwg. No. DS-1014
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1984, 2000 Allegro MicroSystems, Inc.
2985
8-CHANNEL
SOURCE DRIVER
Dimensions in Inches
(controlling dimensions)
0.014
0.008
10
18
0.430
MAX
0.280
0.240
0.300
BSC
1
0.070
0.045
9
0.100
0.920
0.880
0.005
BSC
MIN
0.210
MAX
0.015
0.150
0.115
MIN
0.022
0.014
Dwg. MA-001-18A in
Dimensions in Millimeters
(for reference only)
18
0.355
0.204
10
10.92
MAX
7.11
6.10
7.62
BSC
1
1.77
1.15
2.54
23.37
22.35
BSC
9
0.13
MIN
5.33
MAX
0.39
3.81
2.93
MIN
0.558
0.356
NOTES: 1.
2.
3.
4.
Exact body and lead configuration at vendor’s option within limits shown.
Lead spacing tolerance is non-cumulative.
Lead thickness is measured at seating plane or below.
Supplied in standard sticks/tubes of 21 devices.
Dwg. MA-001-18A mm
2985
8-CHANNEL
SOURCE DRIVER
POWER SOURCE DRIVERS
IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS
Output Ratings *
mA
-25
V
60
60
60
#
8
10
12
Serial
Input
–
X
X
Features
Latched
Diode Saturated
Drivers
Clamp
Outputs
X
–
–
X active pull-down –
X active pull-down –
Internal
Protection
–
–
–
†
Part Number
5815
5810-F and 6809/10
5811 and 6811
60
20
X
X active pull-down –
–
5812-F and 6812
60
32
X
X active pull-down –
–
5818-F and 6818
85
8
–
–
–
–
–
6118
-120
-25
8
–
–
X
X
–
2585
30
8
–
–
X
X
–
2985
50
8
X
X
X
X
–
5895
-350
35
8
–
–
X
–
X
2987
50
8
–
–
X
–
–
2981 and 2982
50
8
X
X
X
–
–
5891
-50
8
–
–
X
–
–
2580
80
8
–
–
X
–
–
2983 and 2984
80
8
X
X
X
–
–
5890
-80
8
–
–
X
–
–
2588
-500
6
1
–
–
–
MOSFET
X
2525 and 2535
6
2
–
–
–
MOSFET
X
2526 and 2536
-4000
60
4
–
–
X
–
–
2944
* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or
over-current protection voltage limits.
† Complete part number includes additional characters to indicate operating temperature range and package style.
The products described here are manufactured under one or more
U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support devices or systems without express written approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement 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