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SN74ABT18245A датащи(PDF) 4 Page - Texas Instruments |
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SN74ABT18245A датащи(HTML) 4 Page - Texas Instruments |
4 / 34 page SN54ABT18245A, SN74ABT18245A SCAN TEST DEVICES WITH 18-BIT BUS TRANSCEIVERS SCBS110H – AUGUST 1992 – REVISED FEBRUARY 1999 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL NAME DESCRIPTION 1A1–1A9, 2A1–2A9 Normal-function A-bus I/O ports. See function table for normal-mode logic. 1B1–1B9, 2B1–2B9 Normal-function B-bus I/O ports. See function table for normal-mode logic. 1DIR, 2DIR Normal-function direction controls. See function table for normal-mode logic. GND Ground 1OE, 2OE Normal-function output enables. See function table for normal-mode logic. TCK Test clock. One of four terminals required by IEEE Standard 1149.1-1990. Test operations of the device are synchronous to TCK. Data is captured on the rising edge of TCK and outputs change on the falling edge of TCK. TDI Test data input. One of four terminals required by IEEE Standard 1149.1-1990. TDI is the serial input for shifting data through the instruction register or selected data register. An internal pullup forces TDI to a high level if left unconnected. TDO Test data output. One of four terminals required by IEEE Standard 1149.1-1990. TDO is the serial output for shifting data through the instruction register or selected data register. TMS Test mode select. One of four terminals required by IEEE Standard 1149.1-1990. TMS directs the device through its TAP controller states. An internal pullup forces TMS to a high level if left unconnected. VCC Supply voltage |
Аналогичный номер детали - SN74ABT18245A |
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Аналогичное описание - SN74ABT18245A |
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