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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9549ABCPZ датащи(PDF) 12 Page - Analog Devices |
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AD9549ABCPZ датащи(HTML) 12 Page - Analog Devices |
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12 / 76 page  AD9549 Rev. D | Page 12 of 76 Pin No. Input/ Output Pin Type Mnemonic Description 60 I 3.3 V CMOS IO_UPDATE I/O Update. A logic transition from 0 to 1 on this pin transfers data from the I/O port registers to the control registers (see the Write section). This pin has an internal 50 kΩ pull-down resistor. 61 I 3.3 V CMOS CSB Chip Select. Active low. When programming a device, this pin must be held low. In systems where more than one AD9549 is present, this pin enables individual programming of each AD9549. This pin has an internal 100 kΩ pull- up resistor. 62 O 3.3 V CMOS SDO Serial Data Output. When the device is in 3-wire mode, data is read on this pin. There is no internal pull-up/pull-down resistor on this pin. 63 I/O 3.3 V CMOS SDIO Serial Data Input/Output. When the device is in 3-wire mode, data is written via this pin. In 2-wire mode, data reads and writes both occur on this pin. There is no internal pull-up/pull-down resistor on this pin. 64 I 3.3 V CMOS SCLK Serial Programming Clock. Data clock for serial programming. This pin has an internal 50 kΩ pull-down resistor. Exposed Die Pad O GND EPAD Analog Ground. The exposed thermal pad on the bottom of the package pro- vides the analog ground for the part. This exposed pad must be connected to ground for proper operation. |
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