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| SN74LS390N资料 | |
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SN74LS390N PDF Download |
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File Size : 105 KB
Manufacturer:MOT Description:Note 1: In the typical PECL 100K logic output Voh is 2.35 volts and Vol is 1.60 volts at 3.3 Vcc. The center voltage of the PECL is therefore1.975 volts. If a 50 ohm resistor is placed between the output and Vcc C 2 volts (1.3 volts), the current through the resistor is (1.975 C 1.3) / 50 = 13.5 mA. The same load can be simulated by a resistor of 147 1% ohms to ground (1.975 / 0.0135 = 146.29 ohms). If additional load current is placed on the output, its load current must be subtracted from the 13.5 mA to calculate a new load resistor. Using similar calculations, use 274 1% ohms to ground for 5.0V operation. |
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| 1PCS | 100PCS | 1K | 10K | ||
| 价 格 | |||||
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型 号：SN74LS390N 厂 家：MOT 封 装：94+ 批 号：350 数 量： 说 明： |
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运 费： 所在地： 新旧程度： |
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| 联系人：张小姐、 颜先生13661569158 |
| 电 话：400-878-9158,021-54286636 |
| 手 机：13661569158 |
| QQ：12230627,596815151,531081618 |
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| 传 真：021-54286636 |
| EMail：susumu@susumu.com.cn |
| 公司地址： 上海市古楼公路348弄25号 |
