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NCN51206GEVB Datasheet(PDF) 9 Page - ON Semiconductor |
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NCN51206GEVB Datasheet(HTML) 9 Page - ON Semiconductor |
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9 / 55 page  NCN5120 www.onsemi.com 9 Table 5. AC PARAMETER The AC parameters are given for a device operating within the Recommended Operating Conditions unless otherwise specified. Symbol Pin(s) Parameter Remark/Test Conditions Min Typ Max Unit POWER SUPPLY tBUS_FILTER VBUS1 VBUS1 filter time See Figure 4 2 ms FIXED DC−DC CONVERTER tVSW1_rise VSW1 Rising slope at VSW1−pin 0.45 V/ns tVSW1_fall Falling slope at VSW1−pin 0.6 V/ns ADJUSTABLE DC−DC CONVERTER tVSW2_rise VSW2 Rising slope at VSW2−pin 0.45 V/ns tVSW2_fall Falling slope at VSW2−pin 0.6 V/ns XTAL OSCILLATOR fXTAL XTAL1, XTAL2 XTAL Oscillator Frequency 16 MHz FAN−IN AND WAKE−UP CONTROL tWAKE FANIN/ WAKE Debounce Time on FANIN/ WAKE−pin See Figure 8 100 ms WATCHDOG tWDPR Prohibited Watchdog Acknowledge Delay See Watchdog, p19 2 33 ms tWDTO Watchdog Timeout Interval Selectable over UART or SPI 33 524 ms tWDTO_acc Watchdog Timeout Interval Accuracy =Xtal accuracy tWDRD Watchdog Reset Delay 0 ns tRESET Reset Duration 8 ms MASTER SERIAL PERIPHERAL INTERFACE (MASTER SPI) tsck SCK SPI Clock period SPI Baudrate depending on configuration input bits (see Interface Mode, p24). Tolerance is equal to Xtal oscillator tolerance. See also Figure 11 2 ms 8 ms tSCK_HIGH SPI Clock high time tSCK / 2 tSCK_LOW SPI Clock low time tSCK / 2 tSDI_SET SDI SPI Data Input setup time 125 ns tSDI_HOLD SPI Data Input hold time 125 ns tSDO_VALID SDO SPI Data Output valid time CL = 20 pF, See Figure 11 100 ns tCS_HIGH CSB SPI Chip Select high time See Figure 11 0.5 x tSCK tCS_SET SPI Chip Select setup time 0.5 x tSCK tCS_HOLD SPI Chip Select hold time 0.5 x tSCK tTREQ_LOW TREQ TREQ low time See Figure 12 125 ns tTREQ_HIGH TREQ high time 125 ns tTREQ_SET TREQ setup time 125 ns tTREQ_HOLD TREQ hold time 125 ns UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) fUART TXD, RXD UART Interface Baudrate Baudrate depending on configuration input pins (see Interface Mode, p24). Tolerance is equal to tolerance of Xtal oscillator tolerance. 19200 Baud 38400 Baud |
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