These synchronous presettable counters feature an internal carry look-ahead for cascading in high speed counting applications. The 'LS169B and 'S169 are 4-bit binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating. This mode of operation helps eliminate the output counting spikes that are normally associated with asynchronous (ripple-clock) counters. A buffered clock input triggers the four master-slave flip-flops on the rising (positive-going) edge of the clock waveform.
These counters are fully programmable; that is the outputs may each be preset to either level
SN74LS169B | |
Rating | Catalog |
Technology Family | LS |
器件 | 状态 | 温度 | 价格 | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
SN74LS169BD | ACTIVE | 0 to 70 | 0.40 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
SN74LS169BDE4 | ACTIVE | 0 to 70 | 0.40 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
SN74LS169BDG4 | ACTIVE | 0 to 70 | 0.40 | 1ku | SOIC (D) | 16 | 40 | TUBE | |
SN74LS169BN | ACTIVE | 0 to 70 | 0.35 | 1ku | PDIP (N) | 16 | 25 | TUBE | |
SN74LS169BNE4 | ACTIVE | 0 to 70 | 0.35 | 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 |
SN74LS169BD | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS169BD | SN74LS169BD |
SN74LS169BDE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS169BDE4 | SN74LS169BDE4 |
SN74LS169BDG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS169BDG4 | SN74LS169BDG4 |
SN74LS169BN | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS169BN | SN74LS169BN |
SN74LS169BNE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS169BNE4 | SN74LS169BNE4 |