The SN74ACT2226 and SN74ACT2228 are dual FIFOs suited for a wide range of serial-data buffering applications, including elastic stores for frequencies up to T2 telecommunication rates. Each FIFO on the chip is arranged as 64 × 1 (SN74ACT2226) or 256 × 1 (SN74ACT2228) and has control signals and status flags for independent operation. Output flags for each FIFO include input ready (1IR or 2IR), output ready (1OR or 2OR), half full (1HF or 2HF), and almost full/almost empty (1AF/AE or 2AF/AE).
Serial data is written into a FIFO on the low-to-high transition of the write-clock (1WRTCLK or 2WRTCLK) input when the write-enable (1WRTEN or 2WRTEN) input and input-ready flag (1IR or 2IR) output are both high
| SN74ACT2228 | |
| Depth | 64 |
| Width | 1 |
| Fmax(MHz) | 22 |
| Sync/Async | S |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.5 to 5.5 |
| Flags Empty | YES |
| Flags Full | YES |
| Flags Half | YES |
| Technology Family | ACT |
| Output Drive(mA) | -8/16 |
| Rating | Catalog |
| 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 |
| SN74ACT2228DW | ACTIVE | -40 to 85 | 3.19 | 1ku | SOIC (DW) | 24 | 25 | TUBE | |
| SN74ACT2228DWR | ACTIVE | -40 to 85 | 3.19 | 1ku | SOIC (DW) | 24 | 2000 | LARGE T&R |
| 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 |
| SN74ACT2228DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ACT2228DW | SN74ACT2228DW |
| SN74ACT2228DWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ACT2228DWR | SN74ACT2228DWR |
