The document describes the features and characteristics of the ULN2001A series, a high-voltage and high-current Darlington transistor array. Each array consists of seven npn Darlington pairs with high-voltage outputs and common-cathode clamp diodes for switching inductive loads. The collector-current rating of a single Darlington pair is 500mA, and they can be paralleled for higher current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers.
The ULN2001A, ULN2002A, ULN2003A, ULN2004A, ULQ2003A and ULQ2004A are high‑voltage, high‑current Darlington transistor arrays. Each device contains seven NPN Darlington pairs with common‑cathode clamp diodes for switching inductive loads. They are used as relay drivers, lamp drivers, display drivers, line drivers and logic buffers.
Ordering information, package options (PDIP, SOIC, SOP, TSSOP), absolute‑maximum ratings, electrical and switching characteristics, and mechanical data are listed. The ULN2001A is marked obsolete and is no longer supplied. Additional package drawings and design guidelines are available on the TI website.
The ULN2001A is obsolete and is no longer supplied.
Each Darlington pair can handle up to 500 mA of collector current.