For processors such as MCUs, CPUs, DSPs, and FPGAs that require loading executable code or configuration data after power-on stability, power-up is the first critical process for the normal operation of the system. This seemingly straightforward process, in fact, encompasses multiple technical design parameters to guarantee the proper initialization of the entire system and the smooth commencement of subsequent functionalities. Key indicators during the power-up process include monotonicity, voltage ramp rate, power-on sequencing, and voltage accuracy. These parameters are effortlessly addressed by the CBM706 series of monitoring reset circuits.

CBM706 Series Product Applications

The primary function of the CBM706 is to accurately monitor the input voltage and precisely execute corresponding control logic outputs according to the designed timing sequence. Consequently, it is the preferred low-cost monitoring solution for digital circuits centered around various types of processors. The following is the block diagram of the CBM706 series:

The CBM706 series, in addition to monitoring multiple voltages, also supports watchdog reset functionality to prevent abnormal program execution in the main controller chip. The built-in debounce reset feature, MR, ensures reliable manual resetting. Furthermore, a voltage comparator is incorporated, which can be used for additional voltage sensing needs or as a simple logic control function.

  Typical features of the CBM706 product series:

l Recision supply voltage monitor

2.63 V (CBM706P, CBM706R, CBM708R)

2.93 V (CBM706S, CBM708S)

3.08 V (CBM706T, CBM708T)

l 100 µA quiescent current

l 200 ms reset pulse width

l Debounced manual reset input ( MR ( 一一一一一 ) )

l Independent watchdog timer

l 1.6 sec timeout (CBM706P, CBM706R, CBM706S,CBM706T)

l Voltage monitor for power fail or low battery warning

l Guaranteed RESET ( 一一一一一一一一 )  valid with V_CC = 1 V

l Superior upgrade for CBM706P/R/S/T, CBM708R/S/T

Core features of the CBM706 product series:

The Corebai Microelectronics CBM706 series of monitoring and reset circuits is dedicated to the high-reliability demands of complex systems, ensuring high precision in monitoring parameters while integrating multiple voltage monitoring functions, watchdog capabilities, a debounced manual reset input, and a 1.25V voltage comparator, among other features. These circuits represent a cost-effective solution for realizing the reliability design of intricate systems. The reset output signal remains functional and can effectively control downstream circuits when the supply voltage exceeds 1V, a characteristic encompassing the operating voltage range of the vast majority of processors and other circuitry. Presently, all products within the CBM706 series consume microampere-level (μA) power, offering functionality, performance, and packaging options that rival those of comparable models from leading international brands.

CBM706 Series Typical Electrical Characteristics Diagram

Electrical Characteristics Diagram：