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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST62T52B датащи(PDF) 66 Page - STMicroelectronics |
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ST62T52B датащи(HTML) 66 Page - STMicroelectronics |
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66 / 68 page  66/68 ST6252B ST6262B 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The ST6252B and ST6262B are mask pro- grammed ROM version of ST62T52B and ST62T62B OTP devices. They offer the same functionality as OTP devices, selecting as ROM options the options defined in the programmable option byte of the OTP version. Figure 1. Programming wave form 1.2 ROM READOUT PROTECTION If the ROM READOUT PROTECTION option is selected, a protection fuse can be blown to pre- vent any access to the program memory content. In case the user wants to blow this fuse, high volt- age must be applied on the TEST pin. Figure 2. Programming Circuit Note: ZPD15 is used for overvoltage protection VR02001 0.5s min 15 10 5 14V typ 100 s max µ t t 4mA typ 100mA µ 150 s typ max TEST TEST VR02003 PROTECT ZPD15 5V VSS VDD TEST 47 F m 100nF 100nF 15V 14V 66 |
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