SG Micro SGM814 Instruction Manual

GENERAL DESCRIPTION
The SGM814, SGM815 and SGM816 are a family of
complete microprocessor supervisory devices which
combine ultra-low power, supervisory circuits and timer
circuits. System reliability is significantly improved by
such integration compared to the designs using
individual ICs or discrete components. These devices
feature a wide supply voltage from 1V to 5V.
Regardless of whether the detection voltage is high or
low, the output can be forced low through the manual
reset pin (nMR).
If the supply voltage (V
power-on period, nRESET will assert low. And when
V is under the default voltage threshold, the nRESET
DD
output keeps low. The V
nRESET triggering by mistake.
The SGM814 and SGM815 both have an active-low
open-drain reset output, and can monitor two different
voltages, either PFI or SENSE trigger the threshold, the
nRESET will assert. The SGM816 has an active-low
push-pull reset output and a watchdog timer to monitor
the process.
The devices are available in a Green SOT-23-6
package. They operate over a junction temperature
range of -40℃ to +125℃.
AVAILABLE OPTIONS
Device nRESET Output
SGM814 √ (Open-Drain)
SGM815
SGM816 √ (Push-Pull)
SG Micro Corp
www.sg-micro.com
) exceeds 0.5V during the
DD
design on V can avoid
HYS DD
nRSTSENSE,
nRSTVDD Output
√ (Open-Drain)
SGM814/SGM815/SGM816
Ultra-Low Power Voltage Detectors
with Optional Watchdog
FEATURES
● High Accuracy Fixed Detection Options: 1.2V,
1.5V, 1.6V, 2V and 3.3V
● High Trigger Accuracy: 1% (TYP)
● Low Quiescent Current: 1.6μA (TYP)
● Low nRESET Defined Input Voltage: 0.5V
● Delay Time for the Power-on Reset Generator:
140ms
● Reset Output Options:
 Open-Drain: SGM814 and SGM815
 Push-Pull: SGM816
● Available in a Green SOT-23-6 Package
APPLICATIONS
Microprocessor Systems
Controllers
Battery-Powered Systems
Portable Equipment
Instruments and Apparatus
Communications-Equipment
TYPICAL APPLICATION
3.3V
1.6V
R
1
R
2
Figure 1. Typical Application Circuit Example
nPFO Output WDI Input
√ (Open-Drain)
VDD
R
SGM815-3.3
nMR nRSTVDD
SENSE
nRSTSENSE
GND
PFI Input nMR Input SENSE Input
√
√
V V
CORE IO
3
DSP
nRESET
GND
√
√ √
√ √
JUNE 2022 – REV. A