SN54221, SN54LS221, SN74221, SN74LS221

DUAL MONOSTABLE MULTIVIBRATORS

WITH SCHMITT TRIGGER INPUTS

SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004

3

POST OFFICE BOX 655303

timing component connections

VCC

Rext

To Cext

Terminal

To Rext/Cext

Terminal

NOTE: Due to the internal circuit, the Rext/Cext terminal never is more positive than the Cext terminal.