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FM

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64

FM3130 Integrated RTC/Alarm with 64Kb FRAM

Rev. 3.2

Sept. 2011

Page 21 of 22

8-pin TDFN (3.0 mm x 6.4 mm body, 0.65mm pitch)

Pin 1

3.00 ±0.1

0.75 ±0.05

0.25 ±0.05

0.65

0.20 REF.

Pin 1 ID

0.0 - 0.05

Exposed

metal pad.

Do not

connect to

anything,

except Vss.

6.70

0.30

0.65

Recommended PCB Footprint

0.40 ±0.1

0.60

3.10

1.10

1.00 ±0.10

1.95 REF

Note: All dimensions in millimeters. This package is footprint compatible with the 8-pin TSSOP,

however care must be taken to ensure PCB traces and vias are not placed within the exposed metal

pad area.

TDFN Package Marking Scheme for Body Size 3mm x 6.4mm

Legend:

R=Ramtron Int‟l Corp, G=”green” TDFN package

XXXX=base part number

LLLL= lot code

YY=year, WW=work week

Example: “Green” TDFN package, FM3130, Lot 0003, Year 2006, Work Week 33

RG

3130

0003

0633

RG

XXXX

LLLL

YYWW