Note that the UDN2980A series (dual in-line
package) and UDN2980LW series (small-outline
IC package) are electrically identical and share a
common terminal number assignment.
Recommended for high-side switching applications that benefit from
separate logic and load grounds, these devices encompass load supply
voltages to 50 V and output currents to -500 mA. These 8-channel source
drivers are useful for interfacing between low-level logic and high-current
loads. Typical loads include relays, solenoids, lamps, stepper and/or servo
motors, print hammers, and LEDs.
All devices may be used with 5 V logic systems — TTL, Schottky TTL,
DTL, and 5 V CMOS. The UDN2981A, UDN2982A, and A2982SLW are
electrically interchangeable, will withstand a maximum output off voltage of
50 V, and operate to a minimum of 5 V. All devices in this series integrate
input current limiting resistors and output transient suppression diodes, and
are activated by an active high input.
The suffix ‘A’ (all devices) indicates an 18-lead plastic dual in-line
package with copper lead frame for optimum power dissipation. Under
normal operating conditions, these devices will sustain 120 mA continuously
for each of the eight outputs at an ambient temperature of +50°C and a supply
of 15 V.
The suffix ‘LW’ (UDN2982LW only) indicates an 18-lead surfacemountable wide-body SOIC package; the A2982SLW is provided in a 20-lead
wide-body SOIC package with improved thermal characteristics.
The UDN2982A, UDN2982LW, and A2982SLW drivers are also
available for operation over an extended temperature range to -40°C. To
order, change the prefix ‘UDN’ to ‘UDQ’ or the suffix ‘SLW’ to ‘ELW’.
These packages are available in Pb (lead) free variants (suffix ‘-T’), with
100% matte-tin leadframe plating.
FEATURES
■TTL, DTL, PMOS, or CMOS Compatible Inputs
■500 mA Output Source Current Capability
■Transient-Protected Outputs
■ Output Breakdown Voltage to 50 V
■DIP or SOIC Packaging
Always order by complete part number, e.g.,UDN2981A .
Note that all devices are not available in all package styles.
AL L OW AB LE P AC K AG E P OWE R D IS S IP AT ION IN W ATTS
0
25
5075100125150
AMB IE NT T EMP ER AT UR E IN °°C
Dwg. GP -02 2-4A
Page 3
2981
AND
2982
8-CHANNEL
SOURCE DRIVERS
ELECTRICAL CHARACTERISTICS at T
= +25°C (unless otherwise specified).
A
ApplicableTestLimits
CharacteristicSymbolDevices Test ConditionsFig.Min.Typ.Max. Units
Output Leakage CurrentI
Output SustainingV
CEX
CE(SUS)
AllVIN = 0.4 V*, VS = 50 V, TA = +70°C1——200µA
AllI
= -45 mA—35——V
OUT
Voltage
Collector-EmitterV
CE(SAT)
Saturation VoltageV
Input CurrentI
IN(ON)
AllVIN = 2.4 V, I
= 2.4 V, I
IN
VIN = 2.4 V, I
= -100 mA2—1.61.8 V
OUT
= -225 mA2—1.71.9 V
OUT
= -350 mA2—1.82.0 V
OUT
UDN2981AVIN = 2.4 V3—140200µA
VIN = 3.85 V3—310450µA
2982†VIN = 2.4 V3—140200µA
VIN = 12 V3—1.251.93mA
Output Source Currentl
(Outputs Open)
Supply CurrentI
OUT
S
UDN2981AVIN = 2.4 V, VCE = 2.0 V2-350——mA
2982†V
= 2.4 V, VCE = 2.0 V2-350——mA
IN
AllVIN = 2.4 V*, VS = 50 V4——10mA
Leakage Current
Clamp DiodeI
Clamp DiodeV
Turn-On Delayt
R
F
ON
AllVR = 50 V, VIN = 0.4 V*5——50µA
AllIF = 350 mA6—1.52.0 V
All 0.5 EIN to 0.5 E
, RL = 100Ω, — — 0.3 2.0 µs
OUT
VS = 35 V
Turn-Off Delayt
OFF
All 0.5 EIN to 0.5 E
, RL = 100Ω, — — 2.0 10 µs
OUT
VS = 35 V, See Note
NOTES: Turn-off delay is influenced by load conditions. Systems applications well below the specified output loading may require
timing considerations for some designs, i.e., multiplexed displays or when used in combination with sink drivers in a totem
pole configuration.
Negative current is defined as coming out of (sourcing) the specified device terminal.
* All inputs simultaneously.
† Complete part number includes a prefix (A or UDN) and a suffix (A or SLW) as follows:
NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown.
2. Lead spacing tolerance is non-cumulative.
3. Supplied in standard sticks/tubes of 37 devices or add “TR” to part number for tape and reel.
www.allegromicro.com
1.27
0.40
0° TO 8°
Dwg. MA-008-20 mm
9
Page 10
2981
AND
2982
8-CHANNEL
SOURCE DRIVERS
10
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.