| ??? 02/14/09 17:16 Read: times |
#162418 - How are you using the '4094? Responding to: ???'s previous message |
Perhaps a resettable SIPO register would be a better choice. 74HC164, among others, is resettable. There are numerous choices in both 4000-series (operates up to 15 volts) and 74HC-series (no more than 6 volts)
Had you taken even one second to look at the datasheet, you'd know that the '4094 is a Serial-In-Serial-Out register that, among other things, has an 8-bit parallel output register in it. On the rising edge of the CLOCK, the shift register portion operates as a shift register normally would, each stage propagating the data on the prior stage to its own output. STROBE causes the data on the shift register to propagate to the output register, which is a tristate register, the outputs of which are enabled with OUTPUT ENABLE, else are in the high-impedance state. The STROBE is the clock to the output registers. The Output Enable, enables the parallel output buffers. You'll find the datasheet very helpful in figuring out how to use this device. The same is true of any other device, too, by the way. If you carefully read the datasheet, you'll find these devices are not so scary. They are, after all, just simple logic, concatenated to provide more complex functions. RE |



