ASM809JEUR-T ALSC [Alliance Semiconductor Corporation], ASM809JEUR-T Datasheet - Page 2

• Manufacturer Part Number: ASM809JEUR-T
• Description: 3 Pin Microcontroller Power Supply Supervisor
• Manufacturer: ALSC [Alliance Semiconductor Corporation]

October 2003
rev 1.0
Pin Description
Pin Diagram
Detailed Description
A
microcontroller to start in a known state. ASM809/810 assert
reset to prevent code execution errors during power-up,
power-down and brown-out conditions.
Reset Timing
The reset signal is asserted- LOW for the ASM809 and HIGH
for the ASM810- when the V
threshold trip voltage and remains asserted for 140ms
minimum after the V
ASM809
proper
1
2
3
-
Pin #
(RESET)
ASM810
reset
2
-
-
-
RESET
CC
input
GND
has risen above the threshold.
RESET
RESET
Name
GND
V
Pin
enables
CC
2
1
CC
(ASM810)
supply voltage falls below the
ASM809
SOT23
3 Pin Microcontroller Power Supply Supervisor
Notice: The information in this document is subject to change without notice
Ground.
RESET is asserted LOW if V
threshold.
RESET is asserted HIGH if V
threshold.
Power supply input voltage (3.0V, 3.3V, 5.0V).
a
microprocessor
3
V
CC
/
CC
CC
V
Block Diagram
CC
falls below V
falls below V
Figure 1: Reset TIming Diagram
RESET
RESET
V
CC
+
-
5V
0V
0V
5V
Function
TH
5V
+
-
0V
TH
GND
and remains LOW for T
4.38V
4.00V
3.08V
2.93V
2.63V
4.63V
and remains HIGH for T
RESET Generator
ASM809, ASM810
V
TH
(ASM810)
RST
ASM809
RST
after V
after V
T
RST
CC
CC
exceeds the
exceeds the
(RESET)
2 of 10
RESET
ASM810
ASM809