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| SN74LS645-1NSR资料 | |
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SN74LS645-1NSR PDF Download |
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File Size : 116 KB
Manufacturer:TI Description: The CS4192 is a monolithic BiCMOS integrated circuit used to translate a digital 10Cbit word from a microprocessor/microcontroller to complementary DC outputs. The DC outputs drive an airCcore meter commonly used in vehicle instrument panels. The 10 bits of data are used to linearly control the quadrature coils of the meter directly with a 0.35 resolution and 1.2 accuracy over the full 360 range of the gauge. The interface from the microcontroller is by a Serial Peripheral Interface (SPI) compatible serial connection using up to a 2.0 MHz shift clock rate. The digital code, which is directly proportional to the desired gauge pointer deflection, is shifted into a DAC and multiplexer. These two blocks provide a tangential conversion function to change the digital data into the appropriate DC coil voltage for the angle demanded. The tangential algorithm creates approximately 40% more torque in the meter movement than does a sinCcos algorithm at 45, 135, 225, and 315 angles. This increased torque reduces the error due to pointer droop at these critical angles. Each output buffer is capable of supplying up to 70 mA per coil and the buffers are controlled by a common OE enable pin. The output buffers are turned off when OE is brought low, while the logic portion of the chip remains powered and continues to operate normally. OE must be high before the falling edge of CS to enable the output buffers. The status pin (ST) reflects the state of the outputs and is low whenever the outputs are disabled. The Serial Gauge Driver is selfCprotected against fault conditions. Each driver is protected for 125 mA (typ.) overcurrent while a global thermal protection circuit limits junction temperature to 170C (typ.). The output drivers are disabled anytime the IC protection circuitry detects an overcurrent or overtemperature fault. The drivers remain disabled until a falling edge is presented on CS. If the fault is still present, the output drivers automatically disable themselves again. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：SN74LS645-1NSR 厂 家：TI 封 装： 批 号：07+ 数 量：14593 说 明：原装正品 |
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运 费：所有运费均有我司承担 所在地：深圳 新旧程度： |
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| 联系人：申小姐 |
| 电 话：0755-83330991,0755-83047629 |
| 手 机：15811820920 |
| QQ：2355514181 |
| MSN：chipstech-int@hotmail.com |
| 传 真：0755-61658118 |
| EMail：sales@chipstech-int.com |
| 公司地址： 深圳市福田区中航路鼎城国际1017 |
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1. 所有我司提供的货物，均为原厂原装正品！ 2. 我们的报价是不含税价格。含税需要增加相应的税点。
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