8-CHANNEL

SATURATED SINK DRIVERS

8-CHANNEL

SATURATED SINK DRIVERS

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 satu-

rated 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 collector-

emitter 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 associ-

ated 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

°C and +85°C. To order,

change the prefix from ‘UDN’ to ‘UDQ’.

ONE OF EIGHT DRIVERS

ABSOLUTE MAXIMUM RATINGS

(UDN2596A) ............................ 500 mA

(UDN2597A) ................................ 1.0 A

Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

*Derate at the rate of 18.2 mW/

°C above

Dwg. No. W-100

Dwg. No. W-101

FEATURES

s Non-Inverting Function

s Low Output ON Voltages

s Up to 1.0 A Sink Capability

s 50 V Min. Output Breakdown

s Output Transient-Suppression

Diodes

2597

s Output Pull-Down for

Fast Turn-Off

s TTL, CMOS Compatible Inputs

s Automotive Capable