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Hitachi Chips: HD3276P
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| Casio 8U | Sharp EL-803 |
| Make and number: | Hitachi HD3276P |
| Package: | 28 pin DIL, 0.6” width, black plastic |
| Known date codes: | 2H, 3E4 |
| Known date of fabrication: | 1972/1973 |
| Calculators: | Sanyo ICC-809, Hitachi KK181B |
| Secondary ICs: | For
the Casio 8U: 1 x IC: Hitachi HD3124P 3C, 16 pin DIL 0.3" width 1 x IC: Hitachi HD3252P 3G3, 16 pin DIL 0.3" width 2 x IC: Toshiba TM4352P 3F, 16 pin DIL 0.3" width For the Sharp EL-803 1 x IC: Hitachi HD3253P 2H, 16 pin DIL, 0.3" width 3 x IC: Toshiba TM4352P I, 16 pin DIL, 0.3" width |
| Power supply: | 7.5V |
| Display capability: | 8
digit + 1(symbol cluster or digit) Small zero notation for the Casio 8U, normal for the Sharp EL-803 |
| Basic Functions: | Four standard plus CE, C, Semi-Reverse Polish Notation (arithmetic) logic. |
| Constant: | Switched on multiply and divide only |
| Advanced functions: | Switch fixed decimal (F/0/2/4) |
| Scientific functions: | None |
| Memory: | None |
| Overflow states: |
Input overflow is
suppressed |
| Overflow recovery: | None |
| Negative sign: | Far left symbol cluster for Casio 8U, far right digit for Sharp EL-803 |
| Bugs: | Pseudo
fixed decimal bug Divide to negative zero bug No trailing zero suppression on results from division |
| Comments: | Early semi-RPN chip which needs heavy support for display driving. The Sharp EL-803 does not use the fixed decimal option. |