HCF40103B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages.
HCF40103B consists of an 8-stage synchronous down counter with a single output that is active when the internal count is zero. This device contains a single 8-bit binary counter. It has control inputs for enabling or disabling the clock, for clearing the counter to its maximum count, and for presetting the counter either synchronously or asynchronously. All control inputs and the CARRY-OUT/ZERO DETECT output are active-low logics. In normal operation, the counter is decremented by one count on each positive transition of the CLOCK. Counting is inhibited when the CARRY-IN/COUNTER ENABLE (CI/CE) input is high. The CARRY-OUT/ZERO DETECT (CO/ZD) output goes low when the count reaches zero if the CI/CE input is low, and remains low for one full clock period. When the SYNCHRONOUS PRESET ENABLE (SPE) input is low, data at the JAM input is clocked into the counter on the next positive clock transition regardless of the state of the CI/CE input. When the ASYNCHRONOUS PRESET ENABLE (APE) input is low, data at the JAM inputs is asynchronously forced into the counter regardless of the state of the SPE, CI/CE, or CLOCK inputs.
JAM inputs J0-J7 represent a single 8 bit binary word. When the CLEAR (CLR) input is low, the counter is asynchronously cleared to its maximum count (25510) regardless of the state of any other input. The precedent relationship between control input is indicated in the truth table. If all control inputs are high at the time of zero count, the counters will jump to the maximum count, giving a counting sequence of 256 clock pulses long. HCF40103B may be cascaded using the CI/CE input and the CO/ZD output, in either a synchronous or ripple mode
| 订购型号 | 产品状态 | 美金价格 | 数量 | 封装 | 包装形式 | 温度范围 | 材料声明 |
| HCF40103BEY | Active | 1000 | PDIP 16 | Tube | HCF40103BEY | ||
| HCF40103M013TR | Active | 1000 | SO-16 | Tape And Reel | HCF40103M013TR |
| 描述 | 版本 | 大小 |
| HCF40103 : DS2886: 8-stage presettable synchronous 8-bit binary down counters | 1 | 827KB |
