These octal buffers/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 ’AHCT240 devices are organized as two 4-bit buffers/line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the device passes 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
| SN74AHC244 | |
| Voltage Nodes(V) | 5, 3.3 |
| Vcc range(V) | 2.0 to 5.5 |
| Logic | True |
| Input Level | CMOS |
| Output Level | CMOS |
| Output Drive(mA) | -8/8 |
| No. of Outputs | 8 |
| tpd max(ns) | 8.5 |
| Static Current | 0.04 |
| Rating | Catalog |
| Technology Family | AHC |
| 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 |
| SN74AHC244DBLE | OBSOLETE | -40 to 85 | SSOP (DB) | 20 | |||
| SN74AHC244DBR | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AHC244DBRE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AHC244DBRG4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AHC244DW | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AHC244DWE4 | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AHC244DWG4 | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AHC244DWR | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AHC244DWRE4 | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AHC244DWRG4 | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AHC244N | ACTIVE | -40 to 85 | 0.25 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74AHC244NE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74AHC244NSR | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AHC244NSRE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AHC244NSRG4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AHC244PW | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AHC244PWE4 | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AHC244PWG4 | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AHC244PWLE | OBSOLETE | -40 to 85 | TSSOP (PW) | 20 | |||
| SN74AHC244PWR | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74AHC244PWRE4 | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74AHC244PWRG4 | ACTIVE | -40 to 85 | 0.23 | 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 |
| SN74AHC244DBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DBR | SN74AHC244DBR |
| SN74AHC244DBRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DBRE4 | SN74AHC244DBRE4 |
| SN74AHC244DBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DBRG4 | SN74AHC244DBRG4 |
| SN74AHC244DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DW | SN74AHC244DW |
| SN74AHC244DWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DWE4 | SN74AHC244DWE4 |
| SN74AHC244DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DWG4 | SN74AHC244DWG4 |
| SN74AHC244DWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DWR | SN74AHC244DWR |
| SN74AHC244DWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DWRE4 | SN74AHC244DWRE4 |
| SN74AHC244DWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244DWRG4 | SN74AHC244DWRG4 |
| SN74AHC244N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74AHC244N | SN74AHC244N |
| SN74AHC244NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74AHC244NE4 | SN74AHC244NE4 |
| SN74AHC244NSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244NSR | SN74AHC244NSR |
| SN74AHC244NSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244NSRE4 | SN74AHC244NSRE4 |
| SN74AHC244NSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244NSRG4 | SN74AHC244NSRG4 |
| SN74AHC244PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244PW | SN74AHC244PW |
| SN74AHC244PWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244PWE4 | SN74AHC244PWE4 |
| SN74AHC244PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244PWG4 | SN74AHC244PWG4 |
| SN74AHC244PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244PWR | SN74AHC244PWR |
| SN74AHC244PWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244PWRE4 | SN74AHC244PWRE4 |
| SN74AHC244PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC244PWRG4 | SN74AHC244PWRG4 |