FM1233ECS3X 查看數據表（PDF） - Fairchild Semiconductor

零件编号

产品描述 (功能)

生产厂家

FM1233ECS3X

3-Pin µC Supervisor Circuit

Fairchild Semiconductor 

Pin Descriptions

Pin Number

1

2

Name

GND

RESET

3

VCC

Circuit Timing (Ex: FM1233E)

3.3V

VTH

Function

GROUND

RESET remains LOW while VCC is below VTH, and for at least

140ms after VCC rises above VTH.

VCC

1V

GND

3.3V

VTH

RESET

1V

GND

When operating properly with 3V VCC (for example), RESET will

also be about 3V. When VCC starts to fall, RESET will follow it

down as shown. When VCC drops below VTH, RESET drops to

ground (“issues a RESET”) and stays there unless VCC also

falls below its minimum operating voltage, approx. 1V. At this

point, the supervisor loses control, and its output may rise, only

to again follow VCC down to the ground.

140ms

When VCC begins to rise, RESET follows it until 1.0V or so is

reached, whereupon the device regains control, RESET is

pulled to ground, etc. When VCC rises above VTH, RESET

comes out of RESET 140 ms later.

If it is required that a lower value than GND + 1.0V is needed

on RESET signal during VCC ≤ 1V, a 100K resistor may be used

on the device output to GND.

FM1233E Rev. D

4

www.fairchildsemi.com

Share Link: