Description
The ST1200 is a 256 bit OTP (one time programmable) EPROM, organized as 256 x 1, manufactured using ST’s highly reliable and well proven NMOS technology. The security mechanism, called Lock-Out, allows the user to inhibit, in write mode, the access to a memory section of 96 bits. Thus, by blowing a polysilicon fuse, the address bits 0 to 95 can be protected against write. The 9th bit of the ST1200 is set to a logical “1” for device identification purposes. In order to avoid any modification, ST has mask-programmed this bit to the logic “1” state. 1 1 1 1 Micromodule (D10) Wafer

Features
■ 256 x 1 bit Organisation
■ 96 bits Protected in Write Mode By Lock-Out Fuse
■ 5 V Power Supply (VCC) and 21 V Programming Voltage (VPP)
■ 85 mW in Read Mode
■ Power On Reset
■ Very High Reliability Level
■ Standard Delivery: Wafer Form and Micromodule Package