UDN2559B DIP IC

Providing improved output current limiting, the UDK, UDN, and
UDQ2559B, EB, and LB quad power drivers combine AND logic
gates and high-current bipolar outputs with complete output protection.
Each of the four outputs will sink 700 mA in the on state. The outputs
have a minimum breakdown voltage (load dump) of 60 V and a
sustaining voltage of 40 V. The inputs are compatible with TTL and
5 V CMOS logic systems.
Over-current protection for each channel has been designed into
these devices and is activated at approximately 1 A. It protects each
output from short circuits with supply voltages up to 25 V. When an
output current trip point is reached, that output stage is driven linearly
resulting in a reduced output current level. If an over-current or shortcircuit condition continues, the thermal-limiting circuits will first sense
the rise in junction temperature and then the rise in chip temperature,
further decreasing the output current. Under worst-case conditions,
these devices will tolerate short circuits on all outputs, simultaneously.
These devices can be used to drive various loads including incandescent lamps (without warming or limiting resistors) or inductive
loads such as relays, solenoids, or dc stepping motors.
The suffix ?B? devices are 16-pin power DIPs, the suffix ?EB?
devices are 28-lead power PLCCs and suffix ?LB? devices are 16-lead
power SOICs for surface-mount applications. All three packages are
of batwing construction to provide for maximum package power
dissipation.
FEATURES
? 700 mA Output Current per Channel
? Independent Over-Current Protection for Each Driver
? Thermal Protection for Device and Each Driver
? Low Output-Saturation Voltage
? Integral Output Flyback Diodes
? TTL and 5 V CMOS Compatible Inputs
? Pin-Compatible With UDQ2543B/EB and UDK2549B/EB