掩膜芯片解密是目前IC解密技术研究中解密难度大、解密费用高的较疑难型解密系列，由于掩膜芯片不具备读写功能，因此采用常规的解密手法无法解密，这也困扰了业内一大批技术工程师。盛世科技顺应客户的解密需求，专门针对各类掩膜芯片/掩膜单片机解密进行了技术攻关，目前，我们已经成功开发出针对各种典型掩膜芯片的成熟解密方案，可以为国内外广大客户提供高效可靠、价格合理的优质掩膜芯片解密服务。
　　HT23C040解密是合泰系列掩膜单片机解密中盛世科技成功破解的典型型号，本文，我们将主要针对HT23C040单片机的主要性能特征进行分析介绍。
　　General Description
　　The HT23C040 is a read-only memory with high performance CMOS storage device whose 4096K of memory is arranged into 524288 word by 8 bits.
　　For application flexibility, the chip enable and output enable control pins can be selected as active high or active low. This flexibility not only allows easy interface with most microprocessors,but also eliminates bus contention in multiple bus microprocessor systems. An additional feature of the HT23C040 is its ability to enter the standby mode whenever the chip enable (CE/CE) is inactive, thus reducing current consumption to below 30[1]A. The combination of these functions makes the chip suitable for high density low power memory applications.
　　HT23C040 Features
　　Operating voltage: 2.7V~5.5V
　　Low power consumption
　　– Operation: 25mA max. (VCC=5V)
　　10mA max. (VCC=3V)
　　– Standby: 30[1]A max. (VCC=5V)
　　10[1]A max. (VCC=3V)
　　Access time: 120ns max. (VCC=5V)
　　250ns max. (VCC=3V)
　　524288