AN504 VISHAY
Document overview
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Technical content
define signals with bandwidths in the range of 60 to 200 MHz. matrices requiring more than one DG884. They reduce the off-output leakage.
4 Disable Outputs
FIGURE 1. DG884 Block Diagram FIGURE 2. DG884 Signal Path
Where Rchannel = RDS1 + RDS2 + RDS4 . can be visualized from the models shown in Figures 3 and 4. corruption during negative overvoltage. of the signal at the source (input) or the drain (output) terminals. to 75 /C0087 for high-frequency designs. FIGURE 5. Change of On-Resistance with Signal Amplitude
- This is because the drive logic applies either rail voltage to
this signal leakage harmlessly to ground.
FIGURE 7. 8085 Microprocessor Interface decided by status of B0 and B1 lines. X 0 1 0 X X X X Salvo pulse – updates current event latches. X 1 0 0 X X X X Reset or clear pulse resets all latches and sets all switches to open circuit. gating shown in the circuit diagram. 0 – D3, of the computer data bus. inherent path match within the crosspoint IC.
monitor, i.e., one fitted with an S-connector (SCART). impedance trade-offs can be evaluated. for bipolar signal operation. V– connected to 0 V) with no loss of logic threshold accuracy. fidelity through the device. FIGURE 8. 4 /C0032 2 /C0032 2 Crosspoint
50 W 35 W
FIGURE 11. PCB Trace Characteristic Impedance differences between the channels. from the decoupling point to ground. CLC111s should feed directly to the crosspoint inputs. the DG884 when set for one input to all outputs. typically be less than 10 mV. one input to one output, shows a bandwidth of 150 MHz. adding some 10 cm (worst case) differential path length.