These programmable frequency dividers/digital timers contain 31 flip-flops plus 30 gates ('LS292) or 15 flip-flops plus 29 gates ('LS294) on a single chip. The count modulo is under digital control of the inputs provided.
Both types feature an active-low clear input to initialize the state of all flip-flops. To facilitate incoming inspection, test points are provided (TP1, TP2, and TP3 on the 'LS292 and TP on the 'LS294). These test points are not intended to drive system loads. Both types feature two clock inputs; either one may be used for clock gating. (See the function table below.)
A brief look at the digital timing capabilities of the 'LS292 will show that with a 1-MHz input frequency, programming for 210 will give a period of 1
| SN74LS294 | |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.75 to 5.25 |
| Input Level | TTL |
| Output Level | TTL |
| Rating | Catalog |
| Technology Family | LS |
| 器件 | 状态 | 温度 | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| SN74LS294N | ACTIVE | 0 to 70 | 5.55 | 1ku | PDIP (N) | 16 | 25 | TUBE | |
| SN74LS294NE4 | ACTIVE | 0 to 70 | 5.55 | 1ku | PDIP (N) | 16 | 25 | TUBE |
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| SN74LS294N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS294N | SN74LS294N |
| SN74LS294NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS294NE4 | SN74LS294NE4 |
