AD75019

a FEATURES 256 Switches in a 16 ؋ 16 Array Wide Signal Range: to Supply Rails of 24 V or ؎12 V Low On-Resistance: 200 ⍀ Typ TTL/CMOS/Microprocessor-Compatible Control Lines Serial Input Simplifies Interface Serial Output Allows Cascading for More Channels Low Power Consumption: 2 mW Quiescent Compact 44-Lead PLCC X0 Y0 16 ؋ 16 Crosspoint Switch Array AD75019 FUNCTIONAL BLOCK DIAGRAM ANALOG INPUTS/OUTPUTS X15 VDD VSS VCC DGND SERIAL DATA IN SHIFT REGISTER CELL #256 +12V –12V +5V DGND LATCH ANALOG SWITCH ANALOG OUTPUTS/ INPUTS AD75019 BUSED CLOCK LINES SERIAL DATA TO NEXT STAGES 16 ؋ 16 ARRAY OF SWITCHES, LATCHES, AND SHIFT REGISTER CELLS (ONLY TWO LOCATIONS ARE SHOWN FOR CLARITY) Y15 ANALOG SWITCH SERIAL DATA FROM PRIOR STAGES BUSED CLOCK LINES SHIFT REGISTER CELL #1 LATCH PARALLEL CLOCK SERIAL CLOCK PCLK SCLK SOUT PRODUCT DESCRIPTION The AD75019 contains 256 analog switches in a 16 × 16 array. Any of the X or Y pins may serve as an input or output. Any or all of the X terminals may be programmed to connect to any or all of the Y terminals. The switches can accommodate signals with amplitudes up to the supply rails and have a typical onresistance of 150 Ω. Data is loaded serially via the SIN input and clocked into an onboard 256-bit shift register via SCLK. When all the switch settings have been programmed, data is transferred into a set of 256 latches via PCLK. The serial shift register is dynamic, so there is a minimum clock rate of 20 kHz. The maximum clock ra...