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Low output-saturation voltages at high load currents are provided by UDN2596A and UDN2597A sink driver ICs. These devices can be used as interface buffers between standard low-power digital logic (particularly MOS) and high-power loads such as relays, solenoids, stepping motors, and LED or incandescent displays. The eight saturated sink drivers in each device feature high-voltage, high-current open-collector outputs. Transient suppression clamp diodes and a minimum 35 V output sustaining voltage allow their use with many inductive loads.
The saturated (non-Darlington) NPN outputs provide low collectoremitter voltage drops as well as improved turn-off times due to an active pull-down function within the output predrive section. The UDN2596A is for use with output loads to 500 mA while the UDN2597A is for use with loads to 1 A. Adjacent outputs may be paralleled for higher load currents.
Inputs require very low input current and are activated by a low logic level consistent with the much greater sinking capability associated with NMOS, CMOS, and TTL logic. The UDN2596A and UDN2597A are rated for use with 5 V logic levels.
Both devices are furnished in 20-pin DIP packages with copper leadframes for improved thermal characteristics. The UDN2596A is also available for operation between -40 and +85. To order, change the prefix from 'UDN' to 'UDQ'.
2596 Maximum Ratings
OutputVoltage,VCE ................................ 50 V Output Current, IOUT (UDN2596A) .................................500 mA (UDN2597A) .....................................1.0 A Supply Voltage, VCC .............................. 7.0 V Input Voltage, VlN ................................. 7.0 V Package Power Dissipation, PD ................................................ 2.27 W* Operating Temperature Range, TA .......................................-20 to +85 Storage Temperature Range, TS .................................... -65 to +150 *Derate at the rate of 18.2 mW/ above TA = +25
2596 Features
Non-Inverting Function Low Output ON Voltages Up to 1.0 A Sink Capability 50 V Min. Output Breakdown Output Transient-Suppression Diodes Output Pull-Down for Fast Turn-Off TTL, CMOS Compatible Inputs Automotive Capable