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