RX-8025SA / RX-8025NB-拓蒂电子（上海）有限公司

RX-8025SA / RX-8025NB: 爱普生(EPSON) 高稳定性实时时钟芯片（I2C 总线）

高稳定性实时时钟芯片（I2C 总线）
工作电压范围：1.70V 至 5.5V
用于计时的宽电压：1.15V 至 5.5V
多种检测功能：晶振停止检测功能
低备用电流：0.48μA / 3V（典型值）
32.768kHz频率输出功能

规格参数

RX-8025SA / RX-8025NB: 爱普生(EPSON) 高稳定性实时时钟芯片（I²C 总线）

完整型号：

型号	料号	封装	MOQ
RX-8025SA AA	Q41802552000100	SOP-14	1000PCS/REEL
RX-8025SA AC	Q41802551000200	SOP-14	1000PCS/REEL
RX-8025NB AA	Q41802592000100	SON-22	1000PCS/REEL
RX-8025NB AC	Q41802592000200	SON-22	1000PCS/REEL

RX-8025SA / RX-8025NB特征

• 内置32.768kHz晶体单元

为高精度调整频率 (±5×10-6 / Ta=+25°C)

• 接口类型

I²C 总线接口 (400kHz)

• 工作电压范围

1.70V 至 5.5V

• 用于计时的宽电压

1.15V 至 5.5V

• 多种检测功能

晶振停止检测功能

• 低备用电流

0.48µA / 3V（典型值）

• 32.768kHz频率输出功能

带 OE 引脚的 C-MOS 输出

• 各种功能包括全日历、双重闹钟、定期中断

• *I2C-Bus 是 NXP Semiconductors 的商标

RX-8025SA / RX-8025NB概述

该模块是一个符合 I2C 总线接口的实时时钟，其中包括一个 32.768-kHz 石英振荡器，该振荡器已针对高精度进行了调整。该模块除了提供产生六种中断的功能、双重报警功能、振荡停止检测功能（用于确定上电时是否存在有效内部数据）和电源电压监控功能外，该模块还包括一个数字时钟精度调节功能，可用于设置各种精度等级。

由于内部振荡电路以恒定电压驱动，32.768-kHz 时钟输出稳定且自由电压波动的影响。

这种在一个 SMT 封装中实现多种功能非常适合从蜂窝网络等各种蜂窝电话到 PDA 和其他小型电子设备。

•内置 32.768 kHz 晶体单元：为高精度调整频率 (± 5 ×10⁻⁶ / Ta = +25 °C)

•接口类型：I2 C-Bus 接口 (400 kHz)

•工作电压范围：1.70 V 至 5.5 V

•用于计时的宽电压：1.15 V 至 5.5 V

•各种检测功能：例如，振荡停止检测功能

•低备用电流：0.48 µA / 3 V (Typ.)

•32.768 kHz 频率输出功能：C-MOS 输出与OE 引脚。

•各种功能包括全日历、双重闹钟、周期性中断。

• 特征

• 内置32.768 kHz 晶体单元

• 为高精度调整频率。 ( ± 5 ×10−6 / Ta = +25 °C ) ( 相当于 ±13 秒的月偏差)

• 多种检测功能

• 电源电压监控功能（可选择检测阈值）

• 停止检测功能

• 上电复位检测功能

• 报警功能和周期性中断功能

• 周期性中断输出。

• 双报警功能。（星期几，时，分）（月，日，时，分）

RX-8025SA / RX-8025NB 系统框图

RX-8025SA Block diagram.png

RX-8025SA / RX-8025NB 外部尺寸

RX-8025SA NB External dimensions.png

RX-8025SA / RX-8025NB规格（详细规格请参考应用手册）

Recommend Operating Conditions

Item	Symbol	Condition	Min.	Typ.	Max.	Unit
Power voltage	V_DD	-	1.7	3.0	5.5	V
Clock voltage	V_CLK	-	1.15	3.0	5.5	V
Operating temperature	T_OPR	-	-40	+25	+85	°C

Frequency characteristics

Item	Symbol	Condition	Rating	Unit
Frequency tolerance	Δ f/f	Ta=+25°C V_DD=3.0V	AA: 5±5 1) AC: 0±5 2)	×10^-6
Oscillation start-up time	t_STA	Ta=+25°C V_DD=2.0V	1 Max.	s
Frequency voltage characteristics	f/V	Ta=+25°C V_DD=2.0V to 5.5V	±1 Max.	×10^-6

*1) 2) Equivalent to ±13 seconds of monthly deviation (excluding offset).

Current consumption characteristics Ta=-40°C to +85°C

Item	Symbol	Conditions		Min.	Typ.	Max.	Unit
Current Consumption	l_BK	f_SCL=0Hz FOE=GND FOUT;output OFF(LOW)	V_DD=5V	-	0.60	1.80	µA
	l_BK	f_SCL=0Hz FOE=GND FOUT;output OFF(LOW)	V_DD=3V	-	0.48	1.20	µA
	l_32k	f_SCL=0Hz V_DD,FOE=5.5V FOUT;output ON (Output=OPEN;CL=0pF)	V_DD=5.5V	-	3.0	6.5	µA

Power supply detection voltage Ta=-30°C to +70°C

Item	Symbol	Condition	Min.	Typ.	Max.	Unit
High-voltage mode	V_DETH	V_DD pin	1.90	2.10	2.30	V
Low-voltage mode	V_DETL	V_DD pin	1.15	1.30	1.45	V

引脚功能

Signal
name

I / O

Function

SCL

This is the serial clock input pin for I2C communications. Data input and output across the SDA pin is synchronized with this pin's clock signal. Up to 5.5 V can be used for this input, regardless of the power supply voltage.

SDA

I/O

This pin's signal is used for input and output of address, data, and ACK bits, synchronized with the serial clock used for I2C communications.
The SDA pin is an N-ch open drain pin during output. Be sure to connect a suitable pull-up resistance relative to the signal line capacity.

FOUT

FOUT terminal is 32.768 kHz clock output terminal (C-MOS) that output control is possible. FOE terminal is the input terminal controlling the output of FOUT pin with /CLEN1 and /CLEN2 bit.

The output of FOUT terminal stops when /CLEN1bit and /CLEN2 bit both sets to "1". FOUT output stops when FOE is Low or OPEN. Status of FOUT output stopped is " L ".

∗The logic table.

FOE input	/CLEN1 bit	/CLEN2 bit	FOUT output
L	Χ	Χ	OFF ( " L " )
H	0	0	32.768kHz
H	0	1	32.768kHz
H	1	0	32.768kHz
H	1	1	OFF ( " L " )

' Χ ' Don't care.

FOE terminal had pull-down resistor built-in and input voltage is possible regardless of power supply voltage to 5.5 V.

FOE

/INTA

This interrupt output A pin is an N-ch open drain output. It outputs alarm interrupts (Alarm_D) and periodic interrupts.

/INTB

This interrupt output B pin is an N-ch open drain output. It outputs alarm interrupts (Alarm_W).

TEST

This pin is used by the manufacturer for testing. Do not connect externally

VDD

This pin is connected to a positive power supply.

GND

This pin is connected to a ground.

(GND)

This pin has the same voltage level as GND. Do not connect externally.

N.C.

This pin is not connected to the internal IC. However, note with caution that the RX-8025NB's N.C. pins (pins 14 to 22) are interconnected via the internal frame. Leave N.C. pins open or connect them to GND or VDD.

注意：务必在 VDD 和 GND 之间连接一个额定值至少为 0.1 µF 的旁路电容。

RX-8025SA / RX-8025NB 包装信息

型号	料号	封装	MOQ
RX-8025SA AA	Q41802552000100	SOP-14	1000PCS/REEL
RX-8025SA AC	Q41802551000200	SOP-14	1000PCS/REEL
RX-8025NB AA	Q41802592000100	SON-22	1000PCS/REEL
RX-8025NB AC	Q41802592000200	SON-22	1000PCS/REEL

Product Name RX-8025SA □

（Standard form） ① ② ③

① Model ② Package type (SA:SOP-14 pin;NB:SON-22 pin)

③ Frequency tolerance (Exclude offset)

AA: 5±5.0 x 10^-6 (Equivalent to ± 13 seconds of monthly deviation) @ +25°C

AC: 0±5.0 x 10^-6 (Equivalent to ± 13 seconds of monthly deviation) @ +25°C

Product Number

RX-8025SA AA Q41802552000100

RX-8025SA AC Q41802551000200

RX-8025NB AA Q41802592000100

RX-8025NB AC Q41802592000200

① ② ③ ④ ⑤

① Crystal devices ② Model

③ Pb free code(1 or 2: EU RoHS compliant / Terminal plating : Sn)

④ Detail specifications ⑤ Packaging (1000pcs/Reel)

Footprint (Recommended)

1. RX-8025SA

RX-8025SA Footprint.gif

2. RX-8025NB

RX-8025NB Footprint.gif

(Unit: mm)

为保持稳定运行，需提供一个 0.1uF 的旁路电容，在尽可能靠近晶体产品电源端子的位置（Vcc - GND 之间）。