UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection Features and Benefits Description 4.75 to 35 V driver supply voltage Providing overcurrent protection for each of its eight Output enable-disable (OE/R) sourcing outputs, the UDN2987LW-6 driver is used as an 350 mA output source current interface between standard low-level logic and relays, motors, Overcurrent protected solenoids, LEDs, and incandescent lamps. This device includes Internal ground clamp diodes thermal shutdown and output transient protection/clamp diodes Output Breakdown Voltage 35 V minimum for use with sustaining voltages to 35 V. TTL, DTL, PMOS, or CMOS compatible inputs In this driver, each channel includes a latch to turn off that Internal Thermal Shutdown (TSD) channel if the maximum channel current is exceeded. All channels are disabled if the thermal shutdown is activated. A common FAULT output is used to indicate either chip thermal Package: 20-pin SOICW (suffix LW) shutdown or any overcurrent condition. All outputs are enabled by pulling the common OE/R input high. When OE/R is low, all outputs are inhibited and the eight latches are reset. The OE/R function can be especially important during power-up, in preventing floating inputs from turning on the outputs. Under normal operating conditions, each of eight outputs will source in excess of 100 mA continuously at an ambient Not to scale temperature of 25C and a supply of 35 V. The overcurrent fault circuit will protect the device from short-circuits to ground with supply voltages of up to 30 V. Continued on the next page Typical Application IN1 OUT1 IN2 OUT2 IN3 OUT3 IN4 OUT4 1 to 8 Load 2987 CPU IN5 OUT5 Components IN6 OUT6 IN7 OUT7 IN8 OUT8 FAULT GND OE/R VS 4.75 to 35 V 29876-DS, Rev. 6DABIC-5 8-Channel Source Driver UDN2987x-6 with Overcurrent Protection Description (continued) The inputs are compatible with 5 and 12 V logic systems: TTL, The UDN2987LW-6 is supplied in a 20-lead small-outline (SOIC-W) Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is plastic package. All packages are lead (Pb) free, with 100% matte- switched ON by an active high input level. Compared to predecessor tin leadframe plating. devices, the UDN2987LW-6 has a significantly faster T (200 ns PHL typical) and a lower driver supply voltage rating (4.75 V), which allows the use of 5 V logic. Selection Guide Part Number Packing Package UDN2987LWTR-6-T 1000 pieces/13-in. reel 20-pin SOIC, wide body Absolute Maximum Ratings Parameter Symbol Notes Rating Units Supply Voltage V 35 V S Continuous Output Current* I Outputs are disabled at approximately 500 mA 500 mA OUT FAULT Output Voltage V 35 V CE FAULT Output Current I 30 mA C Input Voltage V 0.3 to 14 V IN Junction Temperature T 150 C J Storage Temperature Range T Range N 55 to 150 C S Operating Temperature Range T 20 to 85 C A *For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin. Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com