Datasheet > HEF4521BP,652

HEF4521BP,652

更新时间： 2024-11-04 22:53:11

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
17页	798K
描述
IC FREQ DIVIDER 24STG 16DIP

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HEF4521BP,652 数据手册

HEF4521B

24-stage frequency divider and oscillator

Rev. 7 — 30 March 2016

Product data sheet

1. General description

The HEF4521B consists of a chain of 24 toggle flip-flops with an overriding asynchronous

master reset input (MR), and an input circuit that allows three modes of operation. The

single inverting stage (A2 to Y2) functions as: a crystal oscillator, an input buffer for an

external oscillator or in combination with A1 as an RC oscillator. The crystal oscillator

operates in Low-power mode when pins V_SS1and V_DD1are supplied via external resistors.

Each flip-flop divides the frequency of the previous flip-flop by two, consequently the

HEF4521B counts up to 2²⁴= 16777216. The counting advances on the HIGH-to-LOW

transition of the clock (A2). The outputs from each of the last seven stages (2¹⁸to 2²⁴) are

available for additional flexibility.

It operates over a recommended V_DDpower supply range of 3 V to 15 V referenced to V_SS

(usually ground). Unused inputs must be connected to V_DD, V_SS, or another input.

2. Features and benefits

 Low power crystal oscillator operation

 Fully static operation

 5 V, 10 V, and 15 V parametric ratings

 Standardized symmetrical output characteristics

 Specified from 40 C to +85 C

 Complies with JEDEC standard JESD 13-B

3. Ordering information

Table 1.

Ordering information

All types operate from 40 C to +85 C.

Type number

Package

Name

Description

Version

HEF4521BT

SO16

plastic small outline package; 16 leads; body width 3.9 mm

SOT109-1

12 3 4 5 6 7...17

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HEF4521BP,652 替代型号

型号	品牌	替代类型	描述	数据表
HEF4521BT,653	NXP	完全替代	IC FREQ DIVIDER 24STG 16SOIC
HEF4521BT,652	NXP	类似代替	HEF4521B - 24-stage frequency divider and oscillator SOP 16-Pin
HEF4521BP	NXP	功能相似	24-stage frequency divider and oscillator

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HEF4521BT,653	NXP	获取价格	IC FREQ DIVIDER 24STG 16SOIC
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