N

O

T

RE

C

O

M

ME

N

D

ED

FO

R

N

EW

DE

SI

G

N

S

Al

te

rn

at

iv

e:

FM

25

L2

56

B

N

O

T

RE

C

O

M

ME

N

D

ED

FO

R

N

EW

DE

SI

G

N

S

Al

te

rn

at

iv

e:

FM

25

L2

56

B

FM25L256 Extended Temp.

Rev. 2.3

March 2007

Page 13 of 14

8-pin TDFN (4.0mm x 4.5mm body, 0.95mm pitch)

Pin 1

4.50 ±0.1

0.75 ±0.05

0.40 ±0.05

0.95

0.20 REF.

Pin 1 ID

0.0 - 0.05

2.85 REF

3.60 ±0.10

Exposed metal pad.

Do not connect to

anything except Vss.

0.30 ±0.1

4.30

0.50

0.95

Recommended PCB Footprint

0.50

2.70

3.70

Note: All dimensions in millimeters.

TDFN Package Marking Scheme for Body Size 4.0mm x 4.5mm

Legend:

R=Ramtron, G=”green” TDFN package, XXXX=base part number

LLLL= lot code, T= temperature (C=commercial, blank=extended)

YY=year, WW=work week

Example: “Green” TDFN package, FM25L256, Extended temperature, Lot 0003, Year

2005, Work Week 39

RG5L25

0003

0539

RGXXXX

LLLL_T

YYWW