ALLEGRO 2981 DATA SHEET

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UDN2981A thru UDN2984A

1

2

3

4

5

6

7

8

V

S

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.

ABSOLUTE MAXIMUM RATINGS

at 25°C Free-Air Temperature

Output Voltage Range, V

(UDN2981A, UDN2982A,
UDN2982LW, and A2982SLW)
(UDN2983A, UDN2984A,
UDN2984LW, and A2984SLW) .

Input Voltage, V

(UDN2981A and UDN2983A) . . . . . . . . .

(UDN2982A, UDN2984A,
UDN2982LW, UDN2984LW,

A2982SLW, and A2984SLW) . . . . . . . . .

Output Current, I
Package Power Dissipation,

PD . . . . . . . . . . . . . . . . . . . . . . . See Graph

Operating Temperature Range,

T

. . . . . . . . . . . . . . . . . . . . -20°C to +85°C

A

Storage Temperature Range,

T

. . . . . . . . . . . . . . . . . . . -55°C to +150°C

S

IN

OUT

CE

. . . . . . . . . . . . . . -500 mA

18

17

16

15

14

13

12

11

GND

Dwg. No. A-10, 243

. . 5 V to 50 V

35 V to 80 V

15 V

20 V

2981

THRU

29310D*

2984

8-CHANNEL SOURCE DRIVERS

Recommended for high-side switching applications that benefit from
separate logic and load grounds, these devices encompass load supply
voltages to 80 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, UDN2982LW, and
A2982SLW are electrically interchangeable, will withstand a maximum
output off voltage of 50 V, and operate to a minimum of 5 V; the UDN2983A,
UDN2984A, UDN2984LW, and A2984SLW drivers are electrically inter­changeable, will withstand an output voltage of 80 V, and operate to a
minimum of 35 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 and UDN2984LW only) indicates an 18­lead surface-mountable wide-body SOIC package; the A2982SLW and
A2984SLW are provided in a 20-lead wide-body SOIC package with im­proved thermal characteristics.

The UDN2982A, UDN2982LW, A2982SLW, UDN2984A,
UDN2984LW, and A2984SLW 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’.

FEATURES

■ TTL, DTL, PMOS, or CMOS Compatible Inputs

■ 500 mA Output Source Current Capability

■ Transient-Protected Outputs

■ Output Breakdown Voltage to 80 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.

Data Sheet

2981

THRU

2984

8-CHANNEL
SOURCE DRIVERS

One of Eight Drivers

V

5

9

20 K

INPUT

GROUND

A2982SLW and A2984SLW

1

2

3

4

5

6

7

8

9

S

NO

10

CONNECTION

NC

NC

20

19

18

17

16

15

14

13

GROUND+V

12

NO

11

CONNECTION

Dwg. PP-064-2

2983/84 ONLY

7.2 K

3 K

OUTPUT

1.5 K

Dwg. No. A-10,242B

2.5

2.0

18-PIN DIP, R

20-LEAD SOIC, R

18-LEAD SOIC, R

θJA

= 60°C/W

θJA

θJA

= 70°C/W

= 80°C/W

1.5

1.0

0.5

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

0

25

50 75 100 125 150

AMBIENT TEMPERATURE IN °C

Dwg. GP-022-4

2

Worcester, Massachusetts 01615-0036 [phone]

W
Copyright © 1977, 2000 Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

2981

THRU

2984

8-CHANNEL

SOURCE DRIVERS

ELECTRICAL CHARACTERISTICS at TA = +25°C (unless otherwise specified).

Applicable Test Limits

Characteristic Symbol Devices Test Conditions Fig. Min. Typ. Max. Units

Output Leakage Current I

Output Sustaining V

CEX

CE(SUS)

Voltage 2983/84† I

Collector-Emitter V

Saturation Voltage V

CE(SAT)

2981/82† VIN = 0.4 V*, VS = 50 V, TA = +70°C 1 — — 200 µA

2983/84† V

2981/82† I

All VIN = 2.4 V, I

= 0.4 V*, VS = 80 V, TA = +70°C 1 — — 200 µA

IN

= -45 mA — 35 — — V

OUT

= -70 mA — 45 — — V

OUT

= 2.4 V, I

IN

= 2.4 V, I

V

IN

= -100 mA 2 — 1.6 1.8 V

OUT

= -225 mA 2 — 1.7 1.9 V

OUT

= -350 mA 2 — 1.8 2.0 V

OUT

Input Current 2981/83A VIN = 2.4 V 3 — 140 200 µA

I

IN(ON)

2982/84† V

VIN = 3.85 V 3 — 310 450 µA

= 2.4 V 3 — 140 200 µA

IN

VIN = 12 V 3 — 1.25 1.93 mA

Output Source Current l

OUT

(Outputs Open) 2982/84† V

Supply Current I

S

Leakage Current 2983/84† V

2981/83A VIN = 2.4 V, VCE = 2.0 V 2 -350 — — mA

= 2.4 V, VCE = 2.0 V 2 -350 — — mA

IN

2981/82† VIN = 2.4 V*, VS = 50 V 4 — — 10 mA

= 2.4 V*, VS = 80 V 4 — — 10 mA

IN

Clamp Diode I

R

2981/82† VR = 50 V, VIN = 0.4 V* 5 — — 50 µA

Forward Voltage 2983/84† VR = 80 V, VIN = 0.4 V* 5 — — 50 µA

Clamp Diode V

Turn-On Delay t

Turn-Off Delay t

F

ON

OFF

All IF = 350 mA 6 — 1.5 2.0 V

All 0.5 EIN to 0.5 E

V

= 35 V

S

All 0.5 EIN to 0.5 E

, RL = 100Ω, — — 1.0 2.0 µs

OUT

, RL = 100Ω, — — 5.0 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:
UDN2981A,
UDN2982A, UDN2982LW, or A2982SLW,
UDN2983A,
UDN2984A, UDN2984LW, or A2984SLW.

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