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AX5051 Datasheet(PDF) 3 Page - ON Semiconductor |
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AX5051 Datasheet(HTML) 3 Page - ON Semiconductor |
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3 / 28 page ![]() AX5051 www.onsemi.com 3 Table 1. PIN FUNCTION DESCRIPTIONS Symbol Pin(s) Type Description NC 1 N Not to be connected VDD 2 P Power supply, must be supplied with regulated voltage VREG GND 3 P Ground ANTP 4 A Antenna input/output ANTN 5 A Antenna input/output GND 6 P Ground VDD 7 P Power supply, must be supplied with regulated voltage VREG NC 8 N Not to be connected TST1 9 I Must be connected to GND TST2 10 I Must be connected to GND GND 11 P Ground RESET_N 12 I Optional reset input If this pin is not used it must be connected to VDD_IO SYSCLK 13 I/O Default functionality: Crystal oscillator (or divided) clock output Can be programmed to be used as a general purpose I/O pin SEL 14 I Serial peripheral interface select CLK 15 I Serial peripheral interface clock MISO 16 O Serial peripheral interface data output MOSI 17 I Serial peripheral interface data input TST3 18 I Must be connected to GND IRQ 19 I/O Default functionality: Transmit and receive interrupt Can be programmed to be used as a general purpose I/O pin VDD_IO 20 P Unregulated power supply NC 21 N Not to be connected GND 22 P Ground NC 23 N Not to be connected VREG 24 P Regulated output voltage VDD pins must be connected to this supply voltage A 1 mF low ESR capacitor to GND must be connected to this pin NC 25 N Not to be connected NC 26 N Not to be connected CLK16P 27 A Crystal oscillator input/output CLK16N 28 A Crystal oscillator input/output A = analog signal I = digital input signal O = digital output signal I/O = digital input/output signal N = not to be connected P = power or ground All digital inputs are Schmitt trigger inputs; digital input and output levels are LVCMOS/LVTTL compatible and 5 V tolerant. The center pad of the QFN28 package should be connected to GND. |
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