CBM1302 Clock chip with trickle charging

The CBM1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date 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 an AM/PM indicator. Interfacing the CBM1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The CBM1302 is designed to operate on very low power and retain data and clock information on less than 1µW. The CBM1302 has the additional features of dual power pins for primary and backup power supplies, programmable trickle charger for VCC1, and seven additional bytes of scratchpad memory.

Parameters
Features
Applications

Supply(V):2 to 5.5
Time holding current(nA):0.2
Load Capacitance(pF):6
Memory Type:NV SRAM
Interface:3-Wire
Function:RTC

Completely Manages All Timekeeping Functions

Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100 31 x 8 Battery-Backed General-Purpose RAM
Simple Serial Port Interfaces to Most Microcontrollers

Simple 3-Wire Interface

TTL-Compatible (VCC = 5V)

Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data
Low Power Operation Extends Battery Backup Run Time

2.0V to 5.5V Full Operation

Uses Less Than 300nA at 2.0V
8-Pin SOP Package
Optional Industrial Temperature Range: -40°C to +85°C Supports Operation in a Wide Range of Applications

Consumer electronics (set-top boxes, data recording, network applications)
Handheld devices (GPS, POS terminals)
Medical (blood glucose meter, medication counter)
Office equipment (fax/printer, photocopier)
Other (electricity meters, vending machines, temperature monitors, modems)
Telecommunications (routers, switches, servers)

Type	Title	File Size	Date	Download
Product manual	CBM1302	1130KB	2024-12-02	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
CBM1302AS8	Industrial grade	0	$ 0.00 	SOP-8	MSL 3	RoHS	Tape and Reel, 2500	-40 to 85	- + Requested quantity exceeds in stock amount Add to cart