SN74LVTH244A 具有三态输出的 3.3V ABT 八路缓冲器/驱动器
SN74LVTH244A 描述
These octal buffers and line drivers are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.
The ’LVTH244A devices are organized as two 4-bit line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the devices pass 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.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level
| SN54LVTH244A | SN74LVTH244A | |
| Voltage Nodes(V) | 3.3, 2.7 | 3.3, 2.7 |
| Vcc range(V) | 2.7 to 3.6 | 2.7 to 3.6 |
| Logic | True | |
| Input Level | TTL | |
| Output Drive(mA) | -24/48 | -32/64 |
| No. of Gates | 8 | 8 |
| No. of Outputs | 8 | 8 |
| tpd max(ns) | 4.7 | 3.5 |
| Static Current | 14 | 5 mA |
| Rating | Military | Catalog |
| Technology Family | LVT | LVT |
SN74LVTH244A 特性
- Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
- Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
- Support Unregulated Battery Operation Down to 2.7 V
- Ioff and Power-Up 3-State Support Hot Insertion
- Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
- Latch-Up Performance Exceeds 500 mA Per JESD 17
- ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
SN74LVTH244A 芯片订购指南
| 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 |
| SN74LVTH244ADW | ACTIVE | -40 to 85 | 0.60 | 1ku | SOIC (DW) | 20 | 25 | TUBE | LVTH244A |
| SN74LVTH244ADWE4 | ACTIVE | -40 to 85 | 0.60 | 1ku | SOIC (DW) | 20 | 25 | TUBE | LVTH244A |
| SN74LVTH244ADWG4 | ACTIVE | -40 to 85 | 0.60 | 1ku | SOIC (DW) | 20 | 25 | TUBE | LVTH244A |
SN74LVTH244A 质量与无铅数据
| 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 |
| SN74LVTH244ADW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVTH244ADW | SN74LVTH244ADW |
| SN74LVTH244ADWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVTH244ADWE4 | SN74LVTH244ADWE4 |
| SN74LVTH244ADWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LVTH244ADWG4 | SN74LVTH244ADWG4 |
SN74LVTH244A 应用技术支持与电子电路设计开发资源下载
- SN74LVTH244A 数据资料 dataSheet 下载.PDF
- TI 德州仪器缓冲器、驱动器/收发器产品选型与价格 . xls
- CMOS 非缓冲反向器在振荡器电路中的使用 (PDF 951 KB)
- Semiconductor Packing Methodology (PDF 3005 KB)
- 逻辑产品选择指南 2006/2007 （修订版 Z）(4462KB)
- 标准线性和逻辑产品 5 分钟指南 (786KB)
- 了解和解释标准逻辑数据表
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)