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HEF4521BT PDF预览

HEF4521BT

更新时间: 2024-09-30 11:15:03
品牌 Logo 应用领域
安世 - NEXPERIA /
页数 文件大小 规格书
15页 261K
描述
24-stage frequency divider and oscillatorProduction

HEF4521BT 技术参数

是否Rohs认证: 符合生命周期:Active
包装说明:SOP,Reach Compliance Code:compliant
HTS代码:8542.39.00.01风险等级:2.31
其他特性:OUTPUTS FROM LAST 7 STAGES AVAILABLE计数方向:UP
系列:4000/14000/40000JESD-30 代码:R-PDSO-G16
JESD-609代码:e4长度:9.9 mm
负载/预设输入:YES逻辑集成电路类型:BINARY COUNTER
工作模式:ASYNCHRONOUS湿度敏感等级:1
位数:24功能数量:1
端子数量:16最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE传播延迟(tpd):1900 ns
座面最大高度:1.75 mm最大供电电压 (Vsup):15 V
最小供电电压 (Vsup):3 V标称供电电压 (Vsup):5 V
表面贴装:YES技术:CMOS
温度等级:INDUSTRIAL端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL触发器类型:NEGATIVE EDGE
宽度:3.9 mm最小 fmax:17 MHz
Base Number Matches:1

HEF4521BT 数据手册

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HEF4521B  
24-stage frequency divider and oscillator  
Rev. 8 — 3 December 2021  
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 VSS1 and VDD1 are 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 (218 to 224) are available for additional  
flexibility.  
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually  
ground). Unused inputs must be connected to VDD, VSS, or another input.  
2. Features and benefits  
Wide supply voltage range from 3.0 V to 15.0 V  
CMOS low power dissipation  
High noise immunity  
Low power crystal oscillator operation  
Fully static operation  
5 V, 10 V, and 15 V parametric ratings  
Standardized symmetrical output characteristics  
Complies with JEDEC standard JESD 13-B  
ESD protection:  
HBM JESD22-A114F exceeds 2000 V  
MM JESD22-A115-A exceeds 200 V  
Specified from -40 °C to +85 °C  
3. Ordering information  
Table 1. Ordering information  
Type number  
Package  
Temperature range Name  
Description  
Version  
HEF4521BT  
-40 °C to +85 °C  
SO16  
plastic small outline package; 16 leads;  
body width 3.9 mm  
SOT109-1  
 
 
 

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