公开(公告)号：US10819318B1

公开(公告)日：2020-10-27

申请号：US16595096

申请日：2019-10-07

Applicant: Microchip Technology Inc.

Inventor： Barry Britton ,  Phillip Johnson ,  John Schadt ,  David Onimus

IPC: H03K3/356 ,  H03K3/037 ,  G11C11/4078 ,  H03K19/003 ,  G06F1/14 ,  H03K5/133

Abstract: An SEU immune flip-flop includes a master stage data latch having an input, an output, a clock input, being transparent in response to a clock signal first state and being latched in response to a clock signal second state, a slave stage data latch having an input coupled to the master stage data latch output, an output, a scan output, a slave latch clock input, a scan slave latch having an input coupled to the slave stage data latch scan output, an output, and a clock input, being transparent in response to the clock signal second state and being latched in response to the clock signal first state. The slave stage data latch includes a switched inverter disabled when the slave latch is in a transparent state and enabled when the slave latch is in a latched state having a time delay longer than an SEU time period.