These octal buffers and line drivers are designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.
The ’AC240 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE)\ inputs. When OE\ is low, the device passes inverted data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver
| SN74AC240 | |
| Voltage Nodes(V) | 5, 3.3 |
| Vcc range(V) | 2.0 to 6.0 |
| Input Level | CMOS |
| Output Level | CMOS |
| No. of Outputs | 8 |
| Output Drive(mA) | -24/24 |
| tpd max(ns) | 6.5 |
| Static Current | 0.004 |
| Logic | Inv |
| Technology Family | AC |
| 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 |
| SN74AC240DBLE | OBSOLETE | -40 to 85 | SSOP (DB) | 20 | |||
| SN74AC240DBR | ACTIVE | -40 to 85 | 0.44 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AC240DBRE4 | ACTIVE | -40 to 85 | 0.44 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AC240DBRG4 | ACTIVE | -40 to 85 | 0.44 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AC240DW | ACTIVE | -40 to 85 | 0.48 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AC240DWE4 | ACTIVE | -40 to 85 | 0.48 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AC240DWG4 | ACTIVE | -40 to 85 | 0.48 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AC240DWR | ACTIVE | -40 to 85 | 0.40 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AC240DWRE4 | ACTIVE | -40 to 85 | 0.40 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AC240DWRG4 | ACTIVE | -40 to 85 | 0.40 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AC240N | ACTIVE | -40 to 85 | 0.44 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74AC240NE4 | ACTIVE | -40 to 85 | 0.44 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74AC240NSR | ACTIVE | -40 to 85 | 0.44 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AC240NSRE4 | ACTIVE | -40 to 85 | 0.44 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AC240NSRG4 | ACTIVE | -40 to 85 | 0.44 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AC240PW | ACTIVE | -40 to 85 | 0.48 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AC240PWE4 | ACTIVE | -40 to 85 | 0.48 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AC240PWG4 | ACTIVE | -40 to 85 | 0.48 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AC240PWLE | OBSOLETE | -40 to 85 | TSSOP (PW) | 20 | |||
| SN74AC240PWR | ACTIVE | -40 to 85 | 0.40 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74AC240PWRE4 | ACTIVE | -40 to 85 | 0.40 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74AC240PWRG4 | ACTIVE | -40 to 85 | 0.40 | 1ku | TSSOP (PW) | 20 | 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 |
| SN74AC240DBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240D | SN74AC240D |
| SN74AC240DBRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DBR | SN74AC240DBR |
| SN74AC240DBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DBRE4 | SN74AC240DBRE4 |
| SN74AC240DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DBRG4 | SN74AC240DBRG4 |
| SN74AC240DWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DE4 | SN74AC240DE4 |
| SN74AC240DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DG4 | SN74AC240DG4 |
| SN74AC240DWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DR | SN74AC240DR |
| SN74AC240DWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DRE4 | SN74AC240DRE4 |
| SN74AC240DWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240DRG4 | SN74AC240DRG4 |
| SN74AC240N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74AC240N | SN74AC240N |
| SN74AC240NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74AC240NE4 | SN74AC240NE4 |
| SN74AC240NSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240NSR | SN74AC240NSR |
| SN74AC240NSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240NSRE4 | SN74AC240NSRE4 |
| SN74AC240NSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240NSRG4 | SN74AC240NSRG4 |
| SN74AC240PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240PW | SN74AC240PW |
| SN74AC240PWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240PWE4 | SN74AC240PWE4 |
| SN74AC240PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240PWG4 | SN74AC240PWG4 |
| SN74AC240PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240PWR | SN74AC240PWR |
| SN74AC240PWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240PWRE4 | SN74AC240PWRE4 |
| SN74AC240PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AC240PWRG4 | SN74AC240PWRG4 |
