UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

emeritus · 23rd Feb 2021, 12:41 am

When I was using them in the early 1970's, as well as a wider temperature range, the military TTL devices were specced for a wider supply voltage tolerance. From memory, standard 74xx series was 5V +- 0.25V, 54xx series 5V +- 0.5V.

23rd Feb 2021, 12:41 am	#4
emeritus Dekatron Join Date: Jan 2012 Location: Brentwood, Essex, UK. Posts: 5,339	Re: Plastic or ceramic ICs? When I was using them in the early 1970's, as well as a wider temperature range, the military TTL devices were specced for a wider supply voltage tolerance. From memory, standard 74xx series was 5V +- 0.25V, 54xx series 5V +- 0.5V.