LM18293 Datasheet | National Semiconductor

Description The LM18293 is designed to drive DC loads up to one amp. Typical applications include driving such inductive loads as solenoids, relays and stepper motors along with driving switching power transistors and use as a buffer for low level logic signals. The four inputs accept standard TTL and DTL levels for ease of interfacing. Two enable pins are provided that also accept the standard TTL and DTL levels. Each enable controls 2 channels and when an enable pin is disabled (tied low), the corresponding outputs are forced to the TRI-STATE ® condition. If the enable pins are not connected (i.e., floating), the circuit will function as if it has been enabled. Separate pins are provided for the main power supply (pin 8), and the logic supply (pin 16). This allows a lower voltage to be used to bias up the logic resulting in reduced power dissipation. The chip is packaged in a specially designed 16 pin power DIP. The 4 center pins of this package are tied together and form the die paddle inside the package. This provides much better heat sinking capability than most other DIP packages available. The device is capable of operating at voltages up to 36 volts. Features n n n n n n 1A output current capability per channel Pin for pin replacement for L293B Special 16 pin power DIP package 36 volt operation Internal thermal overload protection Logical “0” input voltage up to 1.5 volts results in high noise immunity Typical Connection Data Shee . DS008706-1 FIGURE 1. Application circuit showing bidirectional and on/off control of a single DC motor using two outputs and unidirectional on/off function of two DC motors using a single output each. Order Number LM18293N NS Package Number N16A TRI-STATE ® is a registered trademark of National Semiconductor Corp. © 1998 National Semiconductor Corporation DS008706 .national. . .. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales...