AMIS-70020 Datasheet, PDF (2/7 Pages) AMI SEMICONDUCTOR – Power Failure Elapsed Time Counter

AMIS-70020 Power Failure Elapsed Time Counter
4.0 Block Diagram
Data Sheet
VCC
CUT_OFF Test
1
38
VDD
2
C
CUT_OFF
COMPARATOR
POR
OUT_PORB
0
m3
1
CONTROL
CUT_OFF_CMD
Oscillator ^CLK_1K
1 kHz
0
Divider
(10 bits)
0
m1
m2
1
1
Current_source
Register/Counter
(15 bits)
0
m0
1 ^Q14_OUT
EN0
Q_OUT
5
UC_CLK_IN
CLK_1S
Uc_Clk
6
7
Clk
4
VSS
5.0 Packaging
The AMIS-70020 is packaged in a 150mils SO8. Please visit
http://www.amis.com/pdf/soic.pdf for detailed mechanical
information.
Pinout
Pad Description
Pad No. Name
1
VCC
2
VDD
3
CUT_OFF
4
VSS
5
Q_OUT
6
Uc_Clk
7
Clk
8
Test
AMI Semiconductor
www.amis.com
VCC
VDD
C^TU^eT^st_^_O^OF^uF^t
VSS
AMIS-
70020
Test
Clk
Uc_Clk
Q_Out
Type
Power
Power
Digital Output
Power
Digital Output
Digital Input
Digital Output
Digital Input
Comment
System power that is monitored
Back-up power
Not connected, test purpose only
Ground
Shift register output (CMOS output buffer 2mA)
CLK from microcontroller (Schmitt trigger input); an internal pull down (100KΩ) is
connected on the pin
Internal oscillator/1024 (1Hz) (CMOS output buffer 2mA)
For normal operation: connect to GND
2