These octal buffers and line drivers are designed to have the performance of the ’HCT240 devices and a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit board layout.
The 3-state control gate is a 2-input NOR. If either output-enable (OE1\ or OE2\) input is high, all eight outputs are in the high-impedance state. The ’HCT540 devices provide inverted data at the outputs.
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
| SN74HCT540 | |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.5 to 5.5 |
| Input Level | TTL |
| Output Level | CMOS |
| No. of Outputs | 8 |
| Output Drive(mA) | -6/6 |
| tpd max(ns) | 23 |
| Static Current | 0.08 |
| Logic | Inv |
| Technology Family | HCT |
| 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 |
| SN74HCT540DBR | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74HCT540DBRE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74HCT540DBRG4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SSOP (DB) | 20 | 2000 | LARGE T&R | |
| SN74HCT540DW | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74HCT540DWE4 | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74HCT540DWG4 | ACTIVE | -40 to 85 | 0.28 | 1ku | SOIC (DW) | 20 | 25 | TUBE | |
| SN74HCT540DWR | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74HCT540DWRE4 | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74HCT540DWRG4 | ACTIVE | -40 to 85 | 0.23 | 1ku | SOIC (DW) | 20 | 2000 | LARGE T&R | |
| SN74HCT540N | ACTIVE | -40 to 85 | 0.25 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74HCT540N3 | OBSOLETE | -40 to 85 | PDIP (N) | 20 | |||
| SN74HCT540NE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | PDIP (N) | 20 | 20 | TUBE | |
| SN74HCT540NSR | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74HCT540NSRE4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74HCT540NSRG4 | ACTIVE | -40 to 85 | 0.25 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74HCT540PW | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74HCT540PWE4 | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74HCT540PWG4 | ACTIVE | -40 to 85 | 0.28 | 1ku | TSSOP (PW) | 20 | 70 | TUBE | |
| SN74HCT540PWR | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74HCT540PWRE4 | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74HCT540PWRG4 | ACTIVE | -40 to 85 | 0.23 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| SN74HCT540PWT | ACTIVE | -40 to 85 | 0.60 | 1ku | TSSOP (PW) | 20 | 250 | SMALL T&R | |
| SN74HCT540PWTE4 | ACTIVE | -40 to 85 | 0.60 | 1ku | TSSOP (PW) | 20 | 250 | SMALL T&R | |
| SN74HCT540PWTG4 | ACTIVE | -40 to 85 | 0.60 | 1ku | TSSOP (PW) | 20 | 250 | SMALL 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 |
| SN74HCT540DBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DBR | SN74HCT540DBR |
| SN74HCT540DBRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DBRE4 | SN74HCT540DBRE4 |
| SN74HCT540DBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DBRG4 | SN74HCT540DBRG4 |
| SN74HCT540DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DW | SN74HCT540DW |
| SN74HCT540DWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DWE4 | SN74HCT540DWE4 |
| SN74HCT540DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DWG4 | SN74HCT540DWG4 |
| SN74HCT540DWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DWR | SN74HCT540DWR |
| SN74HCT540DWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DWRE4 | SN74HCT540DWRE4 |
| SN74HCT540DWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540DWRG4 | SN74HCT540DWRG4 |
| SN74HCT540N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74HCT540N | SN74HCT540N |
| SN74HCT540NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74HCT540NE4 | SN74HCT540NE4 |
| SN74HCT540NSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540NSR | SN74HCT540NSR |
| SN74HCT540NSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540NSRE4 | SN74HCT540NSRE4 |
| SN74HCT540NSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540NSRG4 | SN74HCT540NSRG4 |
| SN74HCT540PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PW | SN74HCT540PW |
| SN74HCT540PWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWE4 | SN74HCT540PWE4 |
| SN74HCT540PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWG4 | SN74HCT540PWG4 |
| SN74HCT540PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWR | SN74HCT540PWR |
| SN74HCT540PWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWRE4 | SN74HCT540PWRE4 |
| SN74HCT540PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWRG4 | SN74HCT540PWRG4 |
| SN74HCT540PWT | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWT | SN74HCT540PWT |
| SN74HCT540PWTE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWTE4 | SN74HCT540PWTE4 |
| SN74HCT540PWTG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74HCT540PWTG4 | SN74HCT540PWTG4 |
