Datasheet > SGM860

SGM860

更新时间： 2024-09-25 17:00:55

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
23页	830K
描述
Quad Supply Voltage Supervisors with Adjustable Delay and Watchdog Timer

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SGM860 数据手册

SGM860

Quad Supply Voltage Supervisors

with Adjustable Delay and Watchdog Timer

GENERAL DESCRIPTION

FEATURES

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).

● 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

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.

● 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

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.

APPLICATIONS

Applications with DSP and Microcontroller

Applications with FPGA and ASIC

Telecom and Wireless Infrastructure

Industrial Equipment

The SGM860 is available in a Green TQFN-4×4-20BL

package. It operates over a junction temperature range

of -40℃ to +125℃.

Analog Sequencing

TYPICAL APPLICATION

V_{MON_1}

R_S1H

V_DD1

nMR

V_DD

V_{MON_2}

V_DD2

SENSE1

nRESET4

nRESET3

nRESET2

nRESET1

nWDO

V_{MON_3}

V_{MON_4}

V_DD3

V_DD4

R_S2H

SENSE2

Microcessor

DSP

R_S3H

SENSE3

SGM860A

FPGA

R_S4H

SENSE4L

SENSE4H

nRST

GPIO

R_S1L

R_S2L

R_S3L

VREF

GND

WDI

CT4

R_S4L

CT1

CT2

CT3

Figure 1. Typical Application Circuit

SG Micro Corp

www.sg-micro.com

NOVEMBER 2023 – REV. A

12 3 4 5 6 7...23

中文翻译

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