SGM860中文资料Quad Supply Voltage Supervisors with Adjustable Delay and Watchdog Timer数据手册SGMICRO规格书

描述 Description

The SGM860 is a family of supply voltage supervisors (SVSs). It has four channels and each one can monitor a power rail with a high threshold accuracy of 0.35% (TYP). It also features very low quiescent current of 6μA (TYP).
Among the supply voltage supervisor (SVS-x, x = 1, 2, 3, 4) circuits, four power rails are higher than 0.4V and one power rail is less than 0.4V (even with negative voltage). Once the SENSEy (y = 1, 2, 3, 4L, 4H) input voltage goes down below the configurable threshold, a nRESETx signal can be asserted by each SVS-x. The threshold of each SVS-x can be configured by the external resistors.
A delay can be configured for each SVS-x before nRESETx is released. The delay time for each SVS can be set independently between 1.45ms and 10s via the CTx pin connection. Only SVS-1 has a manual reset signal (nMR) that the nRESETx is activated by a logic low of nMR. SVS-4 has two comparators to monitor the threshold window and the extra comparator can be used as a fifth SVS to monitor the negative voltage based on the voltage reference VREF.
The SGM860 is available in a Green TQFN-4×4-20BL package. It operates over a junction temperature range of -40℃ to +125℃.

特性 Features

• Four Separate Voltage Supervisors

• Channel 1:
Adjustable Threshold Down to 0.4V
Manual Reset (nMR) Input

• Channels 2, 3:
Adjustable Threshold Down to 0.4V

• Channel 4:
Adjustable Positive or Negative Threshold
Window Comparator

• Adjustable Delay Time: 1.45ms to 10s

• Threshold Accuracy: 0.35% (TYP)

• Low Quiescent Current: 6μA (TYP)

• Dedicated Output for Watchdog Timer

• Well-Controlled Output during Power-Up

• Output Options:
SGM860A: Open-Drain nRESETx Output
SGM860B: Push-Pull nRESETx Output

• Available in a Green TQFN-4×4-20BL Package

应用 Application

Applications with DSP and Microcontroller
Applications with FPGA and ASIC
Telecom and Wireless Infrastructure
Industrial Equipment
Analog Sequencing