The SN74ACT3651 is a high-speed, low-power, CMOS clocked FIFO memory that supports clock frequencies up to 67 MHz and has read access times as fast as 11 ns. The 2048 × 36 dual-port SRAM FIFO buffers data from port A to port B. The FIFO memory has retransmit capability, which allows previously read data to be accessed again. The FIFO has flags to indicate empty and full conditions and two programmable flags (almost full and almost empty) to indicate when a selected number of words is stored in memory. Communication between each port takes place with two 36-bit mailbox registers. Each mailbox register has a flag that signals when new mail has been stored. Two or more devices are used in parallel to create wider data paths.
| SN74ACT3651 | |
| Depth | 2048 |
| Width | 36 |
| Fmax(MHz) | 67 |
| Sync/Async | S |
| Voltage Nodes(V) | 5 |
| Technology Family | ACT |
| Output Drive(mA) | -4/8 |
| 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 |
| SN74ACT3651-15PCB | ACTIVE | 0 to 70 | 27.21 | 1ku | HLQFP (PCB) | 120 | 90 | JEDEC TRAY (5+1) | |
| SN74ACT3651-15PQ | ACTIVE | 0 to 70 | 27.21 | 1ku | BQFP (PQ) | 132 | 36 | JEDEC TRAY (10+1) | |
| SN74ACT3651-20PCB | ACTIVE | 0 to 70 | 21.95 | 1ku | HLQFP (PCB) | 120 | 90 | JEDEC TRAY (5+1) |
| 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 |
| SN74ACT3651-15PCB | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-3-260C-168 HR | SN74ACT3651-15PCB | SN74ACT3651-15PCB |
| SN74ACT3651-15PQ | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-4-260C-72 HR | SN74ACT3651-15PQ | SN74ACT3651-15PQ |
| SN74ACT3651-20PCB | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-3-260C-168 HR | SN74ACT3651-20PCB | SN74ACT3651-20PCB |