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UDN2987

Allegro
Part Number UDN2987
Manufacturer Allegro
Description 8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION
Published Jun 25, 2005
Detailed Description 2987 8-CHANNEL SOURCE DRIVER 2987 8-CHANNEL SOURCE DRIVER WITH OVER-CURRENT PROTECTION Providing over-current protectio...
Datasheet PDF File UDN2987 PDF File

UDN2987
UDN2987

Overview
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 .
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