The ’AHC540 octal buffers/drivers are ideal for driving bus lines or buffer memory address registers. These devices feature inputs and outputs on opposite sides of the package to facilitate printed circuit board layout.
The 3-state control gate is a two-input AND gate with active-low inputs so that if either output-enable (OE1\ or OE2\) input is high, all corresponding outputs are in the high-impedance state. The outputs provide inverted data when they are not 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
| SN74AHC540 | |
| Voltage Nodes(V) | 5, 3.3 |
| Vcc range(V) | 2.0 to 5.5 |
| Input Level | CMOS |
| Output Level | CMOS |
| No. of Outputs | 8 |
| Output Drive(mA) | -8/8 |
| tpd max(ns) | 8 |
| Static Current | 0.04 |
| Logic | Inv |
| Technology Family | AHC |
| 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 |
| SN74AHC540DBLE | OBSOLETE | -40 to 85 | SSOP (DB) | 20 | |||
| SN74AHC540DBR | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AHC540DBRE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AHC540DBRG4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74AHC540DW | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AHC540DWE4 | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AHC540DWG4 | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74AHC540DWR | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AHC540DWRE4 | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AHC540DWRG4 | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74AHC540N | ACTIVE | -40 to 85 | 0.25 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74AHC540NE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74AHC540NSR | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AHC540NSRE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AHC540NSRG4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AHC540PW | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AHC540PWE4 | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AHC540PWG4 | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74AHC540PWLE | OBSOLETE | -40 to 85 | TSSOP (PW) | 20 | |||
| SN74AHC540PWR | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74AHC540PWRE4 | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74AHC540PWRG4 | 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 |
| SN74AHC540DBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DBR | SN74AHC540DBR |
| SN74AHC540DBRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DBRE4 | SN74AHC540DBRE4 |
| SN74AHC540DBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DBRG4 | SN74AHC540DBRG4 |
| SN74AHC540DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DW | SN74AHC540DW |
| SN74AHC540DWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DWE4 | SN74AHC540DWE4 |
| SN74AHC540DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DWG4 | SN74AHC540DWG4 |
| SN74AHC540DWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DWR | SN74AHC540DWR |
| SN74AHC540DWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DWRE4 | SN74AHC540DWRE4 |
| SN74AHC540DWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540DWRG4 | SN74AHC540DWRG4 |
| SN74AHC540N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74AHC540N | SN74AHC540N |
| SN74AHC540NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74AHC540NE4 | SN74AHC540NE4 |
| SN74AHC540NSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540NSR | SN74AHC540NSR |
| SN74AHC540NSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540NSRE4 | SN74AHC540NSRE4 |
| SN74AHC540NSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540NSRG4 | SN74AHC540NSRG4 |
| SN74AHC540PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540PW | SN74AHC540PW |
| SN74AHC540PWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540PWE4 | SN74AHC540PWE4 |
| SN74AHC540PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540PWG4 | SN74AHC540PWG4 |
| SN74AHC540PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540PWR | SN74AHC540PWR |
| SN74AHC540PWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540PWRE4 | SN74AHC540PWRE4 |
| SN74AHC540PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AHC540PWRG4 | SN74AHC540PWRG4 |
