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circuit inside the calculator

I've taken apart my pocket calculator, and I'd like to know what IC is inside the black blob. Is there an IC commonly used in such applications?

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  • \$\begingroup\$ thank you..I didn't know the name of it before... \$\endgroup\$ Mar 20 '14 at 8:09
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This is the main controller part of the circuit. Mainly it is found in LCD Displays. eg ST7920

please check it out enter image description here

enter image description here

enter image description here

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  • \$\begingroup\$ That's an example of the same packaging technology, yes, but a fairly different circuit. The one on the calculator is mostly calculator, with a more trivial segment driver. \$\endgroup\$ Mar 20 '14 at 14:12

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