these quad darlington arrays are designed to serve as interface
between low-level logic and peripheral power devices such as solenoids,
motors, incandescent displays, heaters, and similar loads of up to
320 w per channel. both integrated circuits include transient-suppression
diodes that enable use with inductive loads. the input logic is
compatible with most ttl, dtl, lsttl, and 5 v cmos logic.
type udn2878w and udn2879w 4 a arrays are identical except
for output-voltage ratings. the former is rated for operation to 50 v
(35 v sustaining), while the latter has a minimum output breakdown
rating of 80 v (50 v sustaining). the lower-cost udn2879w-2 is
recommended for applications requiring load currents of 3 a or less.
these less expensive devices are identical to the basic parts except for
the maximum allowable load-current rating.
for maximum power-handling capability, all drivers are supplied
in a 12-pin single in-line power-tab package. the tab needs no insulation.
external heat sinks are usually required for proper operation of
these devices.
features
output currents to 4 a
output voltages to 80 v
loads to 1280 w
ttl, dtl, or cmos compatible inputs
internal clamp diodes
plastic single in-line package
heat-sink tab