The TUSB2046IBVFR provides the flexibility of using a 6-MHz or a 48-MHz clock. The logic level of the TSTMODE terminal controls the selection of the clock source. When TSTMODE is low, the output of the internal APLL circuitry is selected to drive the internal core of the device. When TSTMODE is high, the TSTPLL/48MCLK input is selected as the input clock source and the APLL circuitry is powered down and bypassed. The internal oscillator cell is also powered down while TSTMODE is high. Low EMI emission is achieved because the TUSB2046x can usee a 6-MHz crystal input. Connect the crystal as shown in Figure 6. An internal PLL then generates the 48-MHz clock used to sample data from the upstream port and to synchronize the 12 MHz used for the USB clock. If low-power suspend and resume are desired, a passive crystal or resonator must be used. However, a 6-MHz oscillator may be used by connecting the output to the XTAL1 pin and leaving the XTAL2 pin open. The oscillator TTL output must not exceed 3.6 V.

TUSB2046IBVFR For 48-MHz operation, the clock cannot be generated with a crystal using the XTAL2 output because the internal oscillator cell supports only the fundamental frequency. Other useful features of the TUSB2046x include a package with a 0.8-mm pin pitch for easy PCB routing and assembly, push-pull outputs for the PWRON pins eliminate the need for pullup resistors required by traditional open-collector I/Os, andOVRCUR pins have noise filtering for increased immunity to voltage spikes.

TUSB2046IBVFR 制造商: Texas Instruments

产品种类: USB 接口集成电路  

安装风格: SMD/SMT

封装 / 箱体: LQFP-32

系列: TUSB2046

产品: USB Hub Controllers

类型: Hub Controller

标准: USB 2.0

速度: Full Speed

数据速率: 12 Mb/s

TUSB2046IBVFR 电源电压-最小: 3 V

电源电压-最大: 3.6 V

工作电源电流: 40 mA

最小工作温度: - 40 C

最大工作温度: + 85 C

封装: Reel

商标: Texas Instruments  

接口类型: Serial  

端口数量: 4 Port  

工作电源电压: 3.3 V  

产品类型: USB Interface IC  

工厂包装数量: 1000  

子类别: Interface ICs

企业名：深圳市烨弘轩电子有限公司

类型：贸易/代理/分销

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