Datasheet > DS32KHZSNT

DS32KHZSNT

更新时间： 2024-01-25 21:43:56

品牌	Logo	应用领域
美信 - MAXIM		光电二极管
页数	文件大小	规格书
8页	388K
描述
Analog Circuit, 1 Func, PDSO16, 0.300 INCH, SOP-16

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DS32KHZSNT 技术参数

生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOP,	针数：	16
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.01	其他特性：	ALSO REQUIRES 2.7V TO 5.5V BATTERY SUPPLY
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PDSO-G16
长度：	10.3 mm	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	认证状态：	Not Qualified
座面最大高度：	2.65 mm	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	7.5 mm
Base Number Matches：	1

DS32KHZSNT 数据手册

DS32kHz

The DS32kHz is packaged in a 36-pin ball grid array (BGA). It also is available in a 16-pin 0.300” SO and a 14-pin

encapsulated DIP (EDIP) module.

The additional PC board space required to add the DS32kHz as an option for driving a RTC is negligible in many

applications (see Figure 6) Therefore, adding the DS32kHz to new designs and future board revisions allows the

use of the DS32kHz where applications require improved timekeeping accuracy.

Figure 3. Block Diagram

V_CC

Dallas

Semiconductor

DS32kHz

Temperature

Measurement

Power Control

V_BAT

Power

Switching

32.768kHz

Circuit

GND

OPERATION

The DS32kHz module contains a quartz tuning-fork crystal and an IC. When power is first applied, and when the

device switches between supplies, the DS32kHz measures the temperature and adjusts the crystal load to

compensate the frequency. The power supply must remain at a valid level whenever a temperature measurement

is made, including when V_CCis first applied. While powered, the DS32kHz measures the temperature once every

64 seconds and adjusts the crystal load.

The DS32kHz is designed to operate in two modes. In the dual-supply mode, a comparator circuit, powered by V_CC,

monitors the relationship between the V_CCand V_BATinput levels. When V_CCdrops below a certain level compared to

V_BAT, the device switches over to V_BAT(Figure 4A). This mode uses V_CCto conserve the battery connected to V_BAT

while V_CCis applied.

In the single-supply mode, V_CCis grounded and the unit is powered by V_BAT. Current consumption is less than V_CC,

because the comparator circuit is unpowered (Figure 4B).

Figure 4A shows how the DS32kHz should be connected when using two power supplies. V_CCshould be between

4.5V and 5.5V, and V_BATshould be between 2.7V and 3.5V. Figure 4B shows how the DS32kHz can be used when

only a single-supply system is available. V_CCshould be grounded and V_BATshould then be held between 2.7V and

5.5V. The V_BATpin should be connected directly to a battery. Figure 4C shows a single-supply mode where V_CCis

held at +5V. See the frequency stability vs. operating voltage for information about frequency error vs. supply

voltage.

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与DS32KHZSNT相关器件

型号	品牌	描述	获取价格	数据表
DS32KHZST	MAXIM	Analog Circuit, 1 Func, PDSO16, 0.300 INCH, SOP-16	获取价格
DS32KHZST&R	MAXIM	SPECIALTY ANALOG CIRCUIT, PDSO16, 0.300 INCH, SOP-16	获取价格
DS32W	YFW	Surface Mount Schottky Barrier Rectifier	获取价格
DS32W_V01	YFW	Surface Mount Schottky Barrier Rectifier	获取价格
DS32X35	MAXIM	Accurate I2C RTC with Integrated TCXO/Crystal/FRAM	获取价格
DS-331	TE	Two-Way Power Divider 750 - 1500 MHz	获取价格

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