| Part number | UPD4990A |
|---|---|
| Datasheet | UPD4990A_NEC.pdf |
| File Size | 129.98 KB |
| Manufacturer | NEC (now Renesas Electronics) |
| Description | SERIAL I/O CALENDAR & CLOCK CMOS LSI |
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DATA SHEET MOS INTEGRATED CIRCUIT µPD4990A SERIAL I/O CALENDAR & CLOCK CMOS LSI The µPD4990A is a CMOS LSI developed to input/output calendar & clock data serially to/from the micro puter. The crystal frequency is 32.768 kHz and the data items included are time, minute, second, year, month, day, and week.
See all NEC (now Renesas Electronics) datasheets
| Part Number | Description |
|---|---|
| UPD4991A | 4-BIT PARALLEL I/O CALENDAR CLOCK |
| UPD4992 | 8-Bit Parallel I/O Calendar Clock |
| UPD4016 | 2048 x 8 Bit Static NMOS RAM |
| UPD4066B | Quad Bilateral Switch |
| UPD4104 | 4096 x 1 STATIC NMOS RAM |
| UPD4104-1 | 4096 x 1 STATIC NMOS RAM |
| UPD4104-2 | 4096 x 1 STATIC NMOS RAM |
| UPD411 | FULLY DECODED RANDOM ACCESS MEMORY |
| UPD411-1 | FULLY DECODED RANDOM ACCESS MEMORY |
| UPD411-2 | FULLY DECODED RANDOM ACCESS MEMORY |
