QUAD HIGH-CURRENT DARLINGTON SWITCHES These quad Darlington array
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2878 2879
QUAD HIGH-CURRENT DARLINGTON SWITCHES
These quad Darlington arrays designed serve interface between low-level logic peripheral power devices such solenoids, motors, incandescent displays, heaters, similar loads channel. Both integrated circuits include transient-suppression diodes that enable with inductive loads. input logic compatible with most TTL, DTL, LSTTL, CMOS logic. Type UDN2878W UDN2879W arrays identical except output-voltage ratings. former rated operation sustaining), while latter minimum output breakdown rating sustaining). lower-cost UDN2879W-2 recommended applications requiring load currents less. These less expensive devices identical basic parts except maximum allowable load-current rating. maximum power-handling capability, drivers supplied 12-pin single in-line power-tab package. needs insulation. External heat sinks usually required proper operation these devices.
Dwg. A-11,974
Data Sheet 29305.10B
FEATURES
Output Currents Output Voltages Loads 1280 TTL, DTL, CMOS Compatible Inputs Internal Clamp Diodes Plastic Single In-Line Package Heat-Sink
ABSOLUTE MAXIMUM RATINGS +25°C Free-Air Temperature
driver (unless otherwise noted)
Output Voltage, VCEX (UDN2878W) (UDN2879W UDN2879W-2) Output Current, (UDN2878W UDN2879W) (UDN2879W-2) Input Voltage, Input Current, Supply Voltage, Total Package Power Dissipation, Graph Operating Ambient Temperature Range, -20°C +85°C Storage Temperature Range, -55°C +150°C
UDN2879W UDN2879W-2 last-time buy. Orders accepted until April 2002.
Always order complete part number: Part Number UDN2878W UDN2879W UDN2879W-2 Max. Max. VCEX Min. (sus)
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
2.0°C/W
3.0°C/W HEAT SINK 5.0°C/W
12°C/W HEAT SINK 14°C/W
FREE AIR, 38°C/W
TEMPERATURE
Dwg. GP-012B
PARTIAL SCHEMATIC
Drivers
Dwg. A-12,037
NOTE: must connected ground proper operation.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1983, 2000 Allegro MicroSystems, Inc.
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
ELECTRICAL CHARACTERISTICS +25°C (unless otherwise noted).
Test Characteristic Output Leakage Current Symbol ICEX Fig. Applicable Devices UDN2878W Test Conditions +70°C UDN2879W/W-2 +70°C Output Sustaining Voltage VCE(sus) UDN2878W UDN2879W UDN2879W-2 Collector-Emitter Saturation Voltage VCE(SAT) 2.75 2.75 2.75 2.75 UDN2878/79W Input Current 2.75 3.75 Input Voltage VIN(ON) UDN2878/79W Supply Current Driver Turn-On Delay Turn-Off Delay Clamp Diode Leakage Current tPLH tPHL 2.75 Eout Eout, +70°C UDN2879W/W-2 +70°C Clamp Diode Forward Voltage UDN2878/79W Min. Limits Max. 1000 2.75 2.75 Units
Caution: High-current tests pulse tests require heat sinking.
www.allegromicro.com
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
TEST FIGURES
OPEN
OPEN
OPEN
OPEN ICEX
OPEN
Dwg. A-9729A
Dwg. A-10,350
Dwg. A-9732
FIGURE
FIGURE
FIGURE
OPEN
OPEN
OPEN
Dwg. A-9734A
Dwg. A-9735A
Dwg. A-9736
FIGURE
FIGURE
FIGURE
OPEN
Dwg. A-10,351
FIGURE
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
TYPICAL APPLICATIONS
INPUT WAVEFORMS STEPPER-MOTOR DRIVER
Dwg. A-11,795
DIGIT DRIVER MULTIPLEXED INCANDESCENT LAMP DISPLAY
Dwg. A-11,975
PRINT-HAMMER DRIVER
Dwg. A-11,976 Dwg. B-1512
www.allegromicro.com
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
Dimensions Inches
(controlling dimensions)
1.260 1.240 0.020 0.775 0.765 0.245 0.225
0.180
0.055 0.045 0.155 0.145 0.135 0.100
0.140 0.365 0.570 0.540
INDEX AREA
0.290
0.065 0.035
0.030 0.020
0.100
±0.010
0.023 0.018
0.080 0.070
Dwg. MP-007
NOTES:
Lead thickness measured seating plane below. Lead spacing tolerance non-cumulative. Exact body lead configuration vendor option within limits shown. Lead gauge plane 0.030 below seating plane. Supplied standard sticks/tubes devices.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
Dimensions Millimeters
(for reference only)
32.00 31.49 0.51 19.69 19.45 6.22 5.71
4.57
1.40 1.14 3.94 3.68 3.43 2.54
3.56 9.27 14.48 13.71
INDEX AREA
7.36
1.65 0.89
0.76 0.51
2.54
±0.254
0.59 0.45
2.03 1.77
Dwg. MP-007
NOTES:
Lead thickness measured seating plane below. Lead spacing tolerance non-cumulative. Exact body lead configuration vendor's option within limits shown. Lead gauge plane 0.762 below seating plane. Supplied standard sticks/tubes devices.
www.allegromicro.com
2878 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
products described here manufactured under more U.S. patents U.S. patents pending. Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability products. Before placing order, user cautioned verify that information being relied upon current. Allegro products authorized critical components life-support devices systems without express written approval. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringement patents other rights third parties which result from use.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
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