Datasheet > HD74HC490RP

HD74HC490RP

更新时间： 2024-11-26 23:55:27

品牌	Logo	应用领域
其他 - ETC		触发器逻辑集成电路光电二极管
页数	文件大小	规格书
8页	45K
描述
COUNTER\|UP\|DECADE\|HC-CMOS\|SOP\|16PIN\|PLASTIC

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HD74HC490RP 数据手册

HD74HC490

Dual 4-bit Decade Counters

Description

This circuit contains eight master-slave flip-flops and additional gating to implement two individual 4-bit

decade counters. Each decade counter has individual clock, clear and set-to-9 inputs. BCD count

sequences of any length up to divide-by-100 may be implemented with a single HD74HC490. Buffering

on each output is provided to ensure that suceptibility to collector communication is reduced significantly.

The counters have paralle outputs from each counter state so that submultiples of the input count frequency

are available for system timing signals.

Features

•

High Speed Operation: t_pd(Clock to Q_A) = 13 ns typ (C_L= 50 pF)

High Output Current: Fanout of 10 LSTTL Loads

Wide Operating Voltage: V_CC= 2 to 6 V

Low Input Current: 1 µA max

Low Quiescent Supply Current: I_CC(static) = 4 µA max (Ta = 25°C)

Function Table

Clear/Set-To-9

Inputs

Outputs

Clear

Set-To-9

Q_A

Q_B

Q_C

Q_D

Count

12 3 4 5 6 7 8

中文翻译

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型号	品牌	获取价格	描述	数据表
HD74HC490T	HITACHI	获取价格	Decade Counter, HC/UH Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction,
HD74HC51	RENESAS	获取价格	2-wide 2-input, 2-wide 3-input AND-OR-INVERT Gate
HD74HC51	HITACHI	获取价格	2-wide 2-input, 2-wide 3-input AND-OR-INVERT Gate
HD74HC51FP	RENESAS	获取价格	HC/UH SERIES, DUAL 6-INPUT AND-OR-INVERT GATE, PDSO14, FP-14DA
HD74HC51FP-E	RENESAS	获取价格	HC/UH SERIES, DUAL 6-INPUT AND-OR-INVERT GATE, PDSO14, FP-14DA
HD74HC51FPEL	RENESAS	获取价格	2-wide 2-input, 2-wide 3-input AND-OR-INVERT Gate
HD74HC51FP-EL	HITACHI	获取价格	AND-OR-Invert Gate, HC/UH Series, 2-Func, 6-Input, CMOS, PDSO14, FP-14DA
HD74HC51FPEL-E	RENESAS	获取价格	暂无描述
HD74HC51P	RENESAS	获取价格	2-wide 2-input, 2-wide 3-input AND-OR-INVERT Gate
HD74HC51P-E	RENESAS	获取价格	HC/UH SERIES, DUAL 6-INPUT AND-OR-INVERT GATE, PDIP14, DP-14