| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | AT27C256R-55 | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 2 | AT27C256R-55DC | x8 EPROM | 409K |
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| 3 | AT27C256R-55DI | x8 EPROM | 409K |
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| 4 | AT27C256R-55JC | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 5 | AT27C256R-55JI | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 6 | AT27C256R-55LC | x8 EPROM | 409K |
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| 7 | AT27C256R-55LI | x8 EPROM | 409K |
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| 8 | AT27C256R-55PC | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 9 | AT27C256R-55PI | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 10 | AT27C256R-55RC | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 11 | AT27C256R-55RI | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 12 | AT27C256R-55TC | 256K 32K x 8 OTP CMOS EPROM | 257K |
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| 13 | AT27C256R-55TI | 256K 32K x 8 OTP CMOS EPROM | 257K |
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