ELM382
50Hz Long Interval Counter
Description
The ELM382 is a digitally configurable, multi- stage counter circuit in a single 8 pin package. When connected to a 50Hz source, four time periods from one hour to one week are possible, as shown in Table 1 below.
Although the circuit has been optimized for a 50Hz input frequency, it is capable of being operated over a very wide range of frequencies. Of particular interest is the ability to interface directly to very low frequencies with varying waveforms due to the use of a Schmitt trigger input circuit.
The ELM382 provides two outputs – a standard 50% duty cycle divider output, and a momentarily pulsed output. The pulse output is useful for audibly or visually signalling the beginning of a time period, or as a trigger for other circuitry. Refer to the Example Applications section of the data sheet for two typical circuits.
Applications
- Long term (daily or weekly) event timers
- Missing event detectors
- Automatic shutoff circuits
Features
- Low power CMOS design – typically 1mA at 5V
- Wide supply range – 3.0 to 5.5 volt operation
- Digitally selectable delays
- Schmitt trigger circuitry on the clock input
- Completely static operation
- Long term accuracy with line frequency clock
- High current drive outputs – up to 25 mA
- Reset input provided with a pullup resistor
Connection Diagram
( PDIP or SOIC, top view )
Block Diagram
Downloads
The ELM382 data sheet (ver A, 31K):
Quantity Pricing
The following are the unit prices, as you vary the quantity purchased:
| 1-9 |
|
|
| $8.00 |
| 10-99 |
|
|
| $6.67 |
| 100-999 |
|
|
| $6.15 |
| 1000+ |
|
|
| $5.71 |
All prices are in Canadian dollars. We use the total number purchased (ELM382P + ELM382SM) for the calculation.
Purchase
Select the desired integrated circuit package type, then the quantity desired, before adding it to your shopping cart. Quantity discounts will be applied as appropriate.
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