Datasheet > 消费电路 > 时钟集成电路> PCA2001U/10AB

PCA2001U/10AB

更新时间： 2024-09-27 07:03:35

品牌	Logo	应用领域
恩智浦 - NXP		振荡器电池消费电路时钟集成电路商用集成电路智能腕表脉冲电机
页数	文件大小	规格书
28页	140K
描述
32 kHz watch circuit with programmable adaptive motor pulse

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PCA2001U/10AB 技术参数

生命周期：	Obsolete	零件包装代码：	DIE
包装说明：	DIE, DIE OR CHIP	针数：	8
Reach Compliance Code：	compliant	风险等级：	5.12
Is Samacsys：	N	警报：	NO
应用：	WRIST WATCH	电池电量耗尽指示：	NO
商用集成电路类型：	STEPPING MOTOR WATCH	显示模式：	ANALOG
频率微调：	NO	JESD-30 代码：	R-XUUC-N8
功能数量：	1	端子数量：	8
最高工作温度：	60 °C	最低工作温度：	-10 °C
标称振荡器频率：	32.768 KHZ	封装主体材料：	UNSPECIFIED
封装代码：	DIE	封装等效代码：	DIE OR CHIP
封装形状：	RECTANGULAR	封装形式：	UNCASED CHIP
电源：	1.55 V	认证状态：	Not Qualified
子类别：	Clock ICs	最大供电电压 (Vsup)：	3.6 V
最小供电电压 (Vsup)：	1.1 V	表面贴装：	YES
技术：	CMOS	温度等级：	COMMERCIAL
端子形式：	NO LEAD	端子位置：	UPPER
Base Number Matches：	1

PCA2001U/10AB 数据手册

PCA2000; PCA2001

32 kHz watch circuit with programmable adaptive motor pulse

Rev. 05 — 11 November 2008

Product data sheet

1. General description

The PCA2000 and PCA2001 are CMOS integrated circuits for battery operated wrist

watches with a 32 kHz quartz crystal as timing element and a bipolar 1 Hz stepping motor.

The quartz crystal oscillator and the frequency divider are optimized for minimum power

consumption. A timing accuracy of 1 ppm is achieved with a programmable, digital

frequency adjustment.

To obtain the minimum overall power consumption for the watch, an automatic motor

pulse adaptation function is provided. The circuit supplies only the minimum drive current,

which is necessary to ensure a correct motor step. Changing the drive current of the

motor is achieved by chopping the motor pulse with a variable duty cycle. The pulse width

and the range of the variable duty cycle can be programmed to suit different types of

motors. The automatic pulse adaptation scheme is based on a safe dynamic detection of

successful motor steps.

A pad RESET is provided (used for stopping the motor) for accurate time setting and for

accelerated testing of the watch.

The PCA2000 has a battery End Of Life (EOL) warning function. If the battery voltage

drops below the EOL threshold voltage (which can be programmed for silver oxide or

lithium batteries), the motor steps change from one pulse per second to a burst of four

pulses every 4 seconds.

The PCA2001 uses the same circuit as the PCA2000, but without the EOL function.

2. Features

I Amplitude-regulated 32 kHz quartz crystal oscillator, with excellent frequency stability

and high immunity to leakage currents

I Electrically programmable time calibration with 1 ppm resolution stored in One Time

Programmable (OTP) memory

I The quartz crystal is the only external component connected

I Very low power consumption, typical 90 nA

I One second output pulses for bipolar stepping motor

I Minimum power consumption for the entire watch, due to self adaptation of the motor

drive according to the required torque

I Reliable step detection circuit

I Motor pulse width, pulse modulation, and pulse adaptation range programmable in a

wide range, stored in OTP memory

I Stop function for accurate time setting and power saving during shelf life

12 3 4 5 6 7...28

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与PCA2001U/10AB相关器件

型号	品牌	获取价格	描述	数据表
PCA2001U/10AB/1,00	NXP	获取价格	PCA2000; PCA2001 - 32 kHz watch circuit with programmable adaptive motor pulse
PCA2001U/10AC/1	NXP	获取价格	IC STEPPING MOTOR WATCH, UUC8, DIE-8, Clock IC
PCA2001U/10AC/1,00	NXP	获取价格	PCA2000; PCA2001 - 32 kHz watch circuit with programmable adaptive motor pulse
PCA2001U/AA	NXP	获取价格	IC STEPPING MOTOR WATCH, UUC8, DIE-8, Clock IC
PCA2001U/AB	NXP	获取价格	32 kHz watch circuit with programmable adaptive motor pulse
PCA2001U/AB/1,026	NXP	获取价格	PCA2000; PCA2001 - 32 kHz watch circuit with programmable adaptive motor pulse
PCA2001U/AC/1	NXP	获取价格	IC STEPPING MOTOR WATCH, UUC8, DIE-8, Clock IC
PCA2001U/AC/1,026	NXP	获取价格	PCA2000; PCA2001 - 32 kHz watch circuit with programmable adaptive motor pulse
PCA2001U1	NXP	获取价格	32 kHz watch circuit with programmable adaptive motor pulse
PCA2001U10AC	NXP	获取价格	32 kHz watch circuit with programmable adaptive motor pulse

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