A2987

2987 8-CHANNEL SOURCE DRIVER 2987 8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION Providing over-current protection for each of its eight sourcing outputs, the UDN2987A and UDN2987LW drivers are used as an interface between standard low-level logic and relays, motors, solenoids, LEDs, and incandescent lamps. The device includes thermal shutdown and output transient protection/clamp diodes for use with sustaining voltages to 35 V. In these drivers, each channel includes a latch to turn OFF that 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 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. Under normal operating conditions, each of eight outputs will source in excess of 100 mA continuously at an ambient temperature of 25°C and a supply of 35 V. The over-current fault circuit will protect the device from short-circuits to ground with supply voltages of up to 35 V. The inputs are compatible with 5 V and 12 V logic systems—TTL, Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is switched ON by an active high input level. The UDN2987A is supplied in a 20-pin dual in-line plastic package; the UDN2987LW is supplied in a 20-lead small-outline plastic package. Data Sheet 29310.4A IN 1 IN 2 IN 3 IN 4 IN 5 IN 6 IN 7 IN 8 FAULT OE/R 1 2 3 4 5 6 7 8 9 OE x8 OEN FF 20 19 18 17 16 15 14 13 12 SENSEN OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 GROUND V S 10 11 Dwg. PP-067 Note that the UDN2987A (DIP) and the UDN2987LW (SOIC) are electrically identical and share a common terminal number assignment. ABSOLUTE MAXIMUM RATINGS at TA = +25°C Driver Supply Voltage, VS ..................... 35 V Output Sustaining Voltage, VCE(sus) ...... 35 V Continuous Output Current, IOUT ........................................ -500 mA* FAULT Output Voltage, VCE ................. 35 V FAULT Output Current, lC ................. 30 mA Input Voltage, VIN ................................. 15 V Package Power Dissipation, PD ........................................ See Graph Operating Temperature Range, TA ................................. -20°C to +85°C Storage Temperature Range, TS ............................... -55°C to +150°C * Outputs are disabled at approximately -500 mA per driver. FEATURES s s s s s s s 350 mA Output Source Current Over-Current Protected Internal Ground Clamp Diodes Output Breakdown Voltage 35 V, Minimum TTL, DTL, PMOS, or CMOS Compatible Inputs Internal Thermal Shutdown Automotive Capable Always order by complete part number: Part Number UDN2987A UDN2987LW Package 20-Pin DIP 20-Lead Wide-Body SOIC 2987 8-CHANNEL SOURCE DRIVER FUNCTIONAL BLOCK DIAGRAM ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 2.5 2.0 SU FF IX 1.5 SU FF IX 'A ', R θJ A = 'LW ', R 55 °C /W 1.0 θJ A= 70 °C /W 0.5 0 25 50 75 100 125 AMBIENT TEMPERATURE IN °C 150 Dwg. GS-004A Dwg. No. A-13,286 OVER-CURRENT FAULT SENSE OUTPUT CURRENT WAVESHAPES PHL Dwg. No. A-13,292 Dwg. No. A-13,293 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1987, 1997, Allegro MicroSystems, Inc. 2987 8-CHANNEL SOURCE DRIVER ELECTRICAL CHARACTERISTICS at TA = 25°C, VOE = 2.4 V, VS = 35 V (unless otherwise noted). Characteristic Functional Supply Range Output Leakage Current Output Sustaining Voltage Output Saturation Voltage Symbol VS ICEX VOUT(sus) VOUT(SAT) VIN = 0.4 V* IOUT = -350 mA, L = 2.0 mH VIN = 2.4 V, IOUT = -100 mA VIN = 2.4 V, IOUT = -225 mA VIN = 2.4 V, IOUT = -350 mA Channel Shutdown Threshold FAULT Leakage Current FAULT Saturation Voltage Input Voltage IM ICEX VCE(SAT) VIN(ON) V IN(OFF) Input Current IIN(ON) VIN = 2.4 V VIN = 5.0 V VIN = 12 V IIN(OFF) Clamp Diode Leakage Current Clamp Diode Forward Voltage Supply Current IR VF IS(ON) IS(OFF) Thermal Shutdown Thermal Hysteresis Propagation Delay Time TJ ∆TJ tPLH tPHL Dead Time *AII inputs simultaneously. td RL = 100Ω RL = 100Ω VIN = 0.4 V VR = 35 V, TA = 70°C IF = 350 mA VIN = 2.4 V*, Outputs Open VIN = 0.4 V* VIN = 2.4 V VCC = 35 V IC = 30 mA Test Conditions Min. 7.0 — 35 — — — -370 — — 2.4 — — — — — — — — — — — — — — Limits Typ. Max. —