The Cypress CY7C63xx devices use an exceptionally small PROM cell that allows us to sell OTP devices at a price nominally only achieved with masked mcus. This allows us to offer all the advantages of OTP - uncommitted inventory, fast lead time,
etc. at the same price as you would nominally pay for masked parts. There are no setup fees of any kind for this service. Contact Pam Bickel (firstname.lastname@example.org) in our marketing team (858- 613-7932) for information on lead times and unit cost.