Hello Friends,
Does anyone know anything, I mean anything, about the Exar XR 2240 chip? I found a datasheet that makes it look like a good chip to make a sequential timing IC. It can time and count for up to 5 days, and then produce a monostable timing for an event like turning on and off a motor using RC.
It was discontinued by EXAR. Does someone make an equivalent? It is a 16 pin DIP.
From the datasheet:
The time base works as a multistable vibrator with a time period equal to an RC. The eight-bit counter can divide the time output by any integer value from 1 to 255. Generates accurate timing intervals from microseconds through several days. Counter outputs are open collector and may be wire or connected.
Any leads or information would be greatly appreciated. I have been working on a 555 monostable, triggered by a digital pool clock for the days to next monostable event. It would be great to have one chip/circuit that triggers my monostable every day, or two days, or three days...
Jeffrey
Does anyone know anything, I mean anything, about the Exar XR 2240 chip? I found a datasheet that makes it look like a good chip to make a sequential timing IC. It can time and count for up to 5 days, and then produce a monostable timing for an event like turning on and off a motor using RC.
It was discontinued by EXAR. Does someone make an equivalent? It is a 16 pin DIP.
From the datasheet:
The time base works as a multistable vibrator with a time period equal to an RC. The eight-bit counter can divide the time output by any integer value from 1 to 255. Generates accurate timing intervals from microseconds through several days. Counter outputs are open collector and may be wire or connected.
Any leads or information would be greatly appreciated. I have been working on a 555 monostable, triggered by a digital pool clock for the days to next monostable event. It would be great to have one chip/circuit that triggers my monostable every day, or two days, or three days...
Jeffrey