产品应用与封装尺寸
图纸取自原厂规格书，点击可放大查看原始尺寸标注。
引脚定义与内部结构
| 引脚 | 符号 | 名称 |
|---|---|---|
| 11 | B8 | |
| 12 | B7 | |
| 13 | B6 | |
| 14 | B5 | |
| 15 | LSTTL | |
| 16 | B3 | |
| 17 | B2 | |
| 18 | B1 | |
| 19 | OE | |
| 20 | V |
数据来源：原厂规格书引脚图
关键参数速览
- 电源电压 VCC
- ±1000 nA
- 工作温度 TA
- SN74HCT245
电气特性 Electrical Characteristics（TA = 25°C）
| 最小 | 典型 | 最大 | 最小2 | 最大2 | 最小3 | 最大3 |
|---|---|---|---|---|---|---|
| TA | = 25°C | SN54HCT245 | SN74HCT245 | |||
| IOH = –20 µA 4.4 | 4.499 | 4.4 | 4.4 | |||
| VVOOHH VVII == VVIIHH oorr VVIILL 44..55 VV | VV | |||||
| IOH = –6 mA 3.98 | 4.3 | 3.7 | 3.84 | |||
| IOL = 20 µA | 0.001 | 0.1 | 0.1 | 0.1 | ||
| VVOOLL VVII == VVIIHH oorr VVIILL 44..55 VV | VV | |||||
| IOL = 6 mA | 0.17 | 0.26 | 0.4 | 0.33 | ||
| II DIR or OE VI = VCC or 0 5.5 V | ±0.1 | ±100 | ±1000 | ±1000 nA | ||
| IOZ A or B VO = VCC or 0 5.5 V | ±0.01 | ±0.5 | ±10 | ±5 µA | ||
| ICC VI = VCC or 0, IO = 0 5.5 V | 8 | 160 | 80 µA | |||
| ∆ICC † 5.5 V | 1.4 | 2.4 | 3 | 2.9 mA | ||
| Ci ‡ DIR or OE | 3 | 10 | 10 | 10 pF | ||
| switching characteristics over recommended operating | free-air | temperature | range, | C = 50 pF | ||
| FFRROOMM TTOO TA | = 25°C | SN54HCT245 | SN74HCT245 | |||
| 4.5 V | 16 | 22 | 33 | 28 | ||
| ttppdd AA oorr BB BB oorr AA | nnss | |||||
| 5.5 V | 14 | 20 | 30 | 25 | ||
| 4.5 V | 25 | 46 | 69 | 58 | ||
| tteenn OOEE AA oorr BB | nnss | |||||
| 5.5 V | 22 | 41 | 62 | 52 | ||
| 4.5 V | 26 | 40 | 60 | 50 | ||
| ttddiiss OOEE AA oorr BB | nnss | |||||
| 5.5 V | 23 | 36 | 54 | 45 | ||
| 4.5 V | 9 | 12 | 18 | 15 | ||
| tttt AA oorr BB | nnss | |||||
| 5.5 V | 8 | 11 | 16 | 14 | ||
| POST OFFICE BOX 655303 DALLAS, | TEXAS 75265 | 3 |