FM4005
Pin Configuration
Pin Name
CNT1, CNT2
CAL/PFO
Function
Battery-backed Counter Inputs
Clock Calibration and Early
Power-fail Output
Reset Input/Output
Early Power-fail Input
Crystal Connections
Serial Data
Serial Clock
Do Not Use
Battery-Backup Supply
Supply Voltage
Ground
VDD
SCL
SDA
X2
1
2
14
13
CNT1
CNT2
/RST
PFI
X1, X2
SDA
SCL
DNU
VBAK
VDD
VSS
3
4
12
11
DNU
DNU
5
6
7
10
9
X1
CAL/PFO
PFI
RST
VSS
8
VBAK
Ordering Information
Base Configuration
FM4005
Operating Voltage
2.7-5.5V
Reset Threshold
2.6V, 2.9, 3.9, 4.4V
Ordering Part Number
FM4005-G
Rev. 2.3
Oct. 2006
Page 2 of 23
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
