1、JEDEC STANDARD Color Coding of Discrete Semiconductor Devices JESD236-C (Revision of EIA-236-B) MARCH 1986; Reaffirmed November 1999, September 2009 JEDEC SOLID STATE TECHNOLOGY ASSOCIATION NOTICE JEDEC standards and publications contain material that has been prepared, reviewed, and approved throug
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10、59 JEDEC Standard No. 236-C Page 1 COLOR CODING OF DISCRETE SEMICONDUCTOR DEVICES (From EIA Standards Proposal No.1819, formulated under the cognizance of the JC-10 Committee on Terms, Definitions, and Symbols.) 1 Scope This Standard details the rules to be followed if color coding is used to identi
11、fy JEDEC-assigned type numbers or for cathode identification of discrete semiconductor devices. The use of color coding shall be guided by the following general principles: If an end color marking coincides with the device body color, or if the color coding is otherwise not sufficiently distinctive,
12、 color coding shall not be used. This does not preclude the use of a single color mark to identify a cathode in accordance with clause5. 2 Prefix identification The prefix identification consisting of a first number symbol and the letter “N“ shall not be indicated in the color coding. 3 Type-number
13、coding The sequence number consisting of a two-, three-, or four-digit number after the letter “N“ shall be color coded as follows: 3.1 Two-digit sequence numbers shall consist of a first black mark and the sequence number in second and third marks of the colors indicated in Table 1. If a suffix let
14、ter is required, it shall be indicated with a fourth color mark as indicated in Table 1. 3.2 Three-digit sequence numbers shall consist of the sequence number in the first, second, and third marks of the colors indicated in Table 1. If a suffix letter is required, it shall be indicated with a fourth
15、 color mark as indicated in Table 1. 3.3 Four-digit sequence numbers shall consist of the sequence number in four marks of colors indicated in Table 1 with a fifth black mark. If a suffix letter is required, it shall be indicated as the fifth color mark and shall replace the black mark. JEDEC Standa
16、rd No. 236-C Page 2 4 Color marks 4.1 On cylindrical bodies the color marks shall be circumferential and unbroken bands. 4.2 Color bands shall be not less than 1/64“ (0.4 mm) wide and separated from each other by the same minimum distance. If other color marks are used, their minimum dimension shall
17、 be increased to ensure identification of the colors. 4.3 The sequence numbers of the type numbers and suffix letter shall be indicated by the colors in Table 1. TABLE 1 Number Color Suffix Letter 0 Black Not applicable 1 Brown A 2 Red B 3 Orange C 4 Yellow D 5 Green E 6 Blue F 7 Violet G 8 Gray H 9
18、 White J 4.4 The colors used shall conform to the latest issue of Recommended Standard EIA-359 for “Colors for Color Identification and Coding”. 4.5 If the body color of a device is the same as that of a mark, the mark may be indicated by a blank space between adjacent marks. The width of the blank
19、space shall be equal to the mark width plus the width of its adjacent separations. If this marking is not deemed sufficiently distinctive, or if the particular mark appears at the beginning or the end of the number, color coding shall not be used. JEDEC Standard No. 236-C Page 3 5 Cathode identifica
20、tion and reading sequence 5.1 On cylindrical bodies the bands shall clearly be grouped closer to one end of the device and shall be read starting with the band closest to the end of the device. 5.2 On cylindrical diode and rectifier devices for which it is necessary to indicate polarity, the bands s
21、hall be closer to the cathode end. If color coding is not used for type-number identification, a single band may be placed at the cathode end to identify that electrode. 5.3 For cylindrical devices on which it is difficult to group bands closer to one end than the other, the first band shall be doub
22、le width. JEDEC Standard No. 236-C Page 4 This page intentionally left blank. Standard Improvement Form JESD236-C The purpose of this form is to provide the Technical Committees of JEDEC with input from the industry regarding usage of the subject standard. Individuals or companies are invited to sub
23、mit comments to JEDEC. All comments will be collected and dispersed to the appropriate committee(s). If you can provide input, please complete this form and return to: JEDEC Attn: Publications Department 3103 North 10thStreet Suite 240 South Arlington, VA 22201-2107 Fax: 703.907.7583 1. I recommend
24、changes to the following: Requirement, clause number Test method number Clause number The referenced clause number has proven to be: Unclear Too Rigid In Error Other 2. Recommendations for correction: 3. Other suggestions for document improvement: Submitted by Name: Phone: Company: E-mail: Address: City/State/Zip: Date:
