UPD4991A - 4-BIT PARALLEL I/O CALENDAR CLOCK

Product Overview

NEC

UPD4991A 4-BIT PARALLEL I/O CALENDAR CLOCK by NEC - Datasheet Preview — Datasheet preview – UPD4991A

Datasheet Details

Part number	UPD4991A
Manufacturer	NEC
File Size	133.55 KB
Description	4-BIT PARALLEL I/O CALENDAR CLOCK
Datasheet	UPD4991A Datasheet
Additional preview pages of the UPD4991A datasheet.

Product details

Description

1. 0 0 B) Thirteen types of counters are provided: 10-year, 1-year, 10-month, 1-month, 10-day, 1-day, date, 10-hour, 1hour, 10-minute, 1-minute, 10-second, and 1-second. Date codes are 00H through 06H (0000 through 0110B). If leap year identification function is not used, the last day of February is always the 28th.

Features

Time (hour, minute, and second) and calendar (leap year, year, month, day, and date) counters.
Leap year can be automatically identified or set.
12- and 24-hour modes selectable.
4-bit parallel input/output in BCD data format.
Alarm function (hour, minute, second, month, day, date).
One of 0.1, 1.0, 10, 30, and 60-s interval timer outputs selectable.
One of 2048, 1024, 64, 16, 1 Hz, 1-pulse output, and H→L output selectable as alar.

📁 Similar Datasheet

UPD4066B - Quad Analog Switch / Miltiplexer (ETC)
UPD41256 - 262144 Dynamic NMOS RAM (NEC Electronics)
UPD41257 - 262144 Dynamic NMOS RAM (NEC Electronics)
UPD41264 - Dual Port Graphics Buffer (NEC Electronics)
UPD41264C - Dual Port Graphics Buffer (NEC Electronics)
UPD41416 - 16K x 4-Bit DRAM (NEC Electronics)
UPD42101 - Line Buffer (NEC Electronics)
UPD42101G-3 - CMOS 7K-Bit FIFO Memory (ETC)

Other Datasheets by NEC

UPD4990A - SERIAL I/O CALENDAR & CLOCK CMOS LSI
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

Published: Apr 17, 2005 |