FM3104/16/64/256

Rev. 3.2

July 2010

Page 2 of 25

Pin Configuration

Pin Name

Function

CNT1, CNT2

Event Counter Inputs

A0, A1

Device Select inputs

CAL/PFO

Clock Calibration and Early

Power-Fail Output

/RST

Reset Input/Output

PFI

Early Power-fail Input

X1, X2

Crystal Connections

SDA

Serial Data

SCL

Serial Clock

VBAK

Battery-Backup Supply

VDD

Supply Voltage

VSS

Ground

Ordering Information

Base Configuration

Memory Size

Operating Voltage

Reset Threshold

Ordering Part Number

FM31256

256Kb

2.7-5.5V

2.6V, 2.9, 3.9, 4.4V

FM31256-G

FM3164

64Kb

2.7-5.5V

2.6V, 2.9, 3.9, 4.4V

FM3164-G

FM3116

16Kb

2.7-5.5V

2.6V, 2.9, 3.9, 4.4V

FM3116-G

FM3104

4Kb

2.7-5.5V

2.6V, 2.9, 3.9, 4.4V

FM3104-G

Other memory configurations may be available. Please contact the factory for more information.

VDD

VBAK

SCL

SDA

VSS

X1

X2

CAL/PFO

CNT1

PFI

RST

A0

A1

CNT2

1

2

3

4

5

6

7

14

13

12

11

10

9

8