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SN74HC00: 震荡问题

Part Number: SN74HC00

你好,按如下电路设计的PCB,用SN74HC00DR,在RS触发器1和5脚都为高电平状态下,有概率使SN74HC00DR产生内部震荡,震荡频率可达100MHz,无法自恢复。

这个电路使用了几年了,20~22年均无异常,最近批次芯片出现改问题,电路无变更,请帮忙看看是否SN74HC00DR有啥变更?所用晶圆DIE不同?