Seven-channel relay driver reduces board space by 80 percent for telecommunications applications

August 23, 2012 // By Paul Buckley
Texas Instruments Incorporated has introduced what the company claims is the industry’s first fully-integrated, seven-channel relay driver that can support low-voltage relays from as low as 1.8 V up to 5 V.

The ULN2003LV relay driver replaces a handful of discrete components with a single device to drive lower voltages for data relays and rails within telecommunications equipment. Using the ULN2003LV integrated circuit (IC), customers can reduce board space by up to 80 percent, while lowering power consumption and cost.

The ULN2003LV offers high performance in noisy environments.  The input resistor capacitor (RC) snubber improves the driver performance in noisy operating conditions.

The device enables channel grouping for higher current loads. An internal input pull-down resistor allows input logic to be tri-stated for greater efficiency at higher loads.

Seven low-output impedance drivers minimize on-chip power dissipation, providing five times lower power consumption versus the competition.

The relay’s 1.8-V to 5-V CMOS logic input interface is compatible with a wider range of microcontrollers and other logic interfaces compared to the competition.

Availability and Pricing

The ULN2003LV is available in 10-mm x 4-mm, 16-pin SOIC and 5.1-mm x 4.5-mm, 16-pin TSSOP packages. Suggested retail pricing in 100-unit quantities is $0.15.

More information about the ULN2003LV relay driver at