ICM7226: Difference between revisions
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The ICM7226 combines an oscillator, a decade timebase counter, an 8-decade data counter and latches, a 7-segment decoder, digit multiplexer and segment and digit drivers which can directly drive LED displays. | The ICM7226 combines an oscillator, a decade timebase counter, an 8-decade data counter and latches, a 7-segment decoder, digit multiplexer and segment and digit drivers which can directly drive LED displays. | ||
It can function as a frequency counter, period counter, frequency ratio counter, time interval counter, or as a totalizing counter. | It can function as a frequency counter, period counter, frequency ratio counter, time interval counter, or as a totalizing counter. The ICM7226 (and the related was used in numerous simple 1970s/1980s frequency counters, including DIY projects. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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{{EndSpecs}} | {{EndSpecs}} | ||
There are two variants, ICM7226A for common anode displays (≤25 mA per segment), and ICM7226B for common cathode displays (≤12 mA per segment). | There are two variants, ICM7226A for common anode displays (≤25 mA per segment), and ICM7226B for common cathode displays (≤12 mA per segment). They have different pin-out. | ||
{{Part usage}} | {{Part usage}} | ||
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==Data== | ==Data== | ||
* [[Media:Intersil ICM7226.pdf| Intersil ICM7226 datasheet]] | * [[Media:Intersil ICM7226.pdf| Intersil ICM7226 datasheet]] | ||
* [[tube:icm7226|ICM7226 @ radiomuseum.org]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
Intersil ICM7226 photo.jpeg | Intersil ICM7226 photo.jpeg | ||
ICM7226 basic circuit.jpg | ICM7226 basic circuit | |||
</gallery> | </gallery> | ||
[[Category:Digital integrated circuits]] | [[Category:Digital integrated circuits]] | ||
Revision as of 04:41, 10 August 2024
The Intersil ICM7226 is an 8-decade counter and 7-segment driver monolithic integrated circuit.
The ICM7226 combines an oscillator, a decade timebase counter, an 8-decade data counter and latches, a 7-segment decoder, digit multiplexer and segment and digit drivers which can directly drive LED displays.
It can function as a frequency counter, period counter, frequency ratio counter, time interval counter, or as a totalizing counter. The ICM7226 (and the related was used in numerous simple 1970s/1980s frequency counters, including DIY projects.
Key Specifications
| Count frequency | Max. 10 MHz |
|---|
There are two variants, ICM7226A for common anode displays (≤25 mA per segment), and ICM7226B for common cathode displays (≤12 mA per segment). They have different pin-out.
Some instruments using part ICM7226
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| DC5004 | Tektronix | Plug-in | DC5004 | frequency counter | 1989 |
| DC504A | Tektronix | Plug-in | DC504A | 100 MHz, 6-digit frequency counter | 1984 |
Data
Photos
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ICM7226 basic circuit
