CBM32S34A Ultra high precision, SPI bus RTC, integrated crystal and SRAM

The CBM32S34 is a low-cost, extremely accurate SPI bus real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The

CBM32S34 incorporates a precision, temperature-compensated voltage reference and comparator circuit to monitor VCC. When VCC drops below the power-fail voltage (VPF),the device asserts the RST output and also disables read and write access to the part when VCC drops below both VPF and VBAT. The RST pin is monitored as a pushbutton input for generating a µP reset. The device switches to the backup supply input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The CBM32S34 is available in commercial and industrial temperature ranges, and is offered in an industry-standard 300-mil, 20-pin SO package.The CBM32S34 also integrates 256 bytes of battery-backed SRAM. In the event of main power loss, the contents of the memory are maintained by the power source connected to the VBAT pin. The RTC maintains seconds, minutes, hours, day, date, month, and year information.The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially by an SPI bidirectional bus.

Parameters
Features
Applications

Supply(V):2.0 to 5.5
Time holding current(nA):0.15
Load Capacitance(pF):--
Memory Type:NV SRAM
Interface:SPI
Function:RTC

Highly Accurate RTC with Integrated Crystal and

SRAM Completely Manages All Timekeeping Functions

Accuracy ±2ppm from 0°C to +40°C

Accuracy ±3.5ppm from -40°C to +85°C

Real-Time Clock Counts Seconds, Minutes, Hours,Day, Date, Month, and Year, with Leap Year Compensation Valid Up to 2099

Digital Temp Sensor Output: ±3°C Accuracy

Register for Aging Trim

RST Input/Output

Two Time-of-Day Alarms

Programmable Square-Wave Output
Simple Serial Interface Connects to Most Microcontrollers

4MHz SPI Bus Supports Modes 1 and 3
Battery-Backup Input for Continuous Timekeeping

Low Power Operation Extends Battery Backup Run Time
Operating Temperature Ranges: Commercial: 0°C to +70°C, Industrial: -40°C to +85°C
300-Mil, 20-Pin SO Package

● Servers

● Telematics

● Utility Power Meters

● GPS

Type	Title	File Size	Date	Download
Selection Guide	Corebai Selection Guide Rev.En2023.pdf	7.73M	2024-01-24	Download

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计算工具

ANALOG-ENGINEER-CALC — 模拟工程师计算器

模拟工程师计算器旨在加快模拟电路设计工程师经常使用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算的列表（从使用反馈电阻器设置运算放大器增益到为稳定模数转换器 (ADC) 驱动器缓冲器电路选择合适的电路设计元件）。除了可用作单独的工具之外，该计算器还能够很好地与模拟工程师口袋参考书中所述的概念配合使用。

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Product number	Rating	Inventory(pcs)	Price	Package	MSL	RoHS	MPQ	Operating Temperature Range (℃)	Order
CBM32S34AS20	Industrial grade	0	$ 0.00 	SOP-20	MSL 3	RoHS	Tape and Reel, 2500	-40 to 85	- + Requested quantity exceeds in stock amount Add to cart