Nichrome Resistor Networks

on Ceramic Substrates

Models 664, 667, 668

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT electronics’ own data and is considered accurate at time of going to print.

© TT electronics plc

10.13

Typical Marking

Ordering Information4

66 4 -A- 1002 A LF 7

Model Series:

66 = Passivated Nichrome

on Ceramic

Number of Leads:

4= 8 leads

7=14 leads

8=16 leads

Circuit Type:

A=Isolated

B=Bussed

Packaging Option:

7=7” Tape & Reel

13 = 13” Tape & Reel

(No Code used for Tubes)

Lead Finish:

LF=Lead Free (RoHS)

Tolerance Code

Resistance Code

Accuracy Code at 25°C

A

B

D

F

Absolute Resistance Tolerances (%)

± 0.1

± 0.1

± 0.5

± 1.0

Ratio Tolerances (R1 Ref) (%)

± 0.05

± 0.1

± 0.1

± 0.5

Temperature Coefficient of Resistance (ppm/°C)

±25

Temperature Coefficient of Resistance, Tracking (ppm/°C)

±5

Model + Pin count

Tubes

7” Tape & Reel

13” Tape & Reel

664

100

1000

2500

667

50

500

2500

668

50

500

2500

Resistance Code4

Resistance Tolerance Code

Packaging Options (Unit Count/Package Type)

First 3 digits are significant. Fourth digit denotes number of trailing zeros. For values less than 100, use

“R” to denote a decimal point. Example, 51 and 10000 ohms are coded as 51R0 and 1002 respectively.

Standard values follow E96.

4 Contact customer service for custom designs and features.

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BI Technologies Corporation

4200 Bonita Place

Fullerton, CA 92835 USA

Website: www.bitechnologies.com

May 29, 2008

page 3 of 3

BI technologies

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

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First 3 digits are significant. Fourth digit denotes number of trailing zeros. For values less than 100, use “R” to denote a

decimal point. Example, 51 and 10000 ohms are coded as 51R0 and 1002 respectively. Standard values follow E96.















Accuracy Code at 25°C

A

B

D

F

Absolute Resistance Tolerances (%)

± 0.1

± 0.1

± 0.5

± 1.0

Ratio Tolerances (R1 Ref) (%)

± 0.05

± 0.1

± 0.1

± 0.5

Temperature Coefficient of Resistance (ppm/°C)

±25

Temperature Coefficient of Resistance, Tracking (ppm/°C)

±5











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





Model + Pin count

Tubes

7” Tape & Reel

13” Tape & Reel

664

100

1000

2500

667

50

500

2500

668

50

500

2500





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





4

Contact customer service for custom designs and features.

66 4 -A-1002 A LF 7

Model Series:

66 = Passivated Nichrome

on Ceramic

Number of Leads:

4= 8 leads

7=14 leads

8=16 leads

Circuit Type:

A=Isolated

B=Bussed

Packaging Option:

7=7” Tape & Reel

13 = 13" Tape & Reel

(No Code used for Tubes)

Lead Finish:

No Code=SnPb

LF=Lead Free (RoHS)

Tolerance Code

Resistance Code

Lot number printed

on backside of 664

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