1、JEDEC STANDARD Numbering of Like-Named Terminal Functions in Semiconductor Devices and Designation of Units in Multiple-Unit Semiconductor Devices JESD321C (Previously known as EIA-321-C and ANSI/EIA-321-C-1987) APRIL 1976 (Reaffirmed: November 1995, April 1999, March 2009, September 2009) JEDEC SOL
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10、on, VA 22201-2107 or call (703) 907-7559 EIA-321-C Page 1 NUMBERING OF LIKE-NAMBD TERMINAL FUNCTIONS IN SEMICONDUCTOR DEVICES AND DESIGNATION OF UNITS IN MULTIPLE-UNIT SEMICONDUCTOR DEVICES (From Standards Proposal No. 1916, formulated under the cognizance of JEDEC Committee JC-10 on Terms and Defin
11、itions.) 1. Scope This Standard gives the system for numbering like-named electrodes or terminal functions in semiconductor devices and for assigning numerical designations to unite of multiple-unit semiconductor devices. It applies to both integrated circuits and discrete devices. The examples are
12、intended only to identify terminal functions and not to indicate any preferred function for the specific terminals. In the case of integrated circuits, it is not the intent of this Standard to specify the alphabetical characters or signal names associated with particular functions. 2. Requirements T
13、he numbering of electrodes, terminal functions, or designation of units shall be derived from the terminal numbering for the device package as specified in the latest revision of EIA-308, “Preparation of Outline Drawings of Solid State Products for JEDEC Type Registration.“ Following connno“ practic
14、e, the terminal numbering show“ for discrete devices is as see“ in bottom views of the devices, whereas the terminal numbering show“ for integrated circuits is as seen in top views of the devices. For explanation of the symbols in parentheses, see Clause 3. In single-unit semiconductor devices havin
15、g more than one electrode of the same type or like-named terminal functions, (see examples 1, 2, and 3), the first of the similar functions, that is, the o“e connected to the lowest- numbered terminal, shall be assigned the number 1. Successively higher numbers shall be assigned to the remaining sim
16、ilar functions according to the sequence in which connections are made to successively higher-numbered terminals. If similarly named electrodes or terminal functions are functionally different, appropriate numbering independent of terminal numbers shall he used. For example, JEDEC registration docum
17、ents specify that the two emitters of a Darlington-connected transistor are to be designated 1 and 2 for the input and output transistors, respectively. Another example is a“ integrated circuit having select lines with binary weighting. EIA-321-C Page 2 Example 1. Double-Emitter Transistor Terminal
18、Function 1 Emitter No. 1 (El) 2 Emitter No. 2 (E2) 3 Collector (C) 4 Base (B) Example 3. AND-Gated JK Flip-Flop Terminal Function 1 No connection 2 Clear (CLR) 3 J input No. 1 (Jl) 4 J input No. 2 (52) 5 J input No. 3 (531 6 Inverted output (Q) 7 Ground (GND) Example 2. data inp (A2) 13 (A31 14 (A41
19、 15 (A5) 16 (6) 17 (A71 18 (8) 19 20 B bus input No. 7 (B7) B bus input No. 6 (B6) B bus input No. 5 CBS) B bus input No. 4 (B4) B bus input No. 3 (B3) B bus input No. 2 (B2) B bus input No. 1 (Bl) Enable (G) “cc EIA-321-C Page 5 In integrated circuits having several independent parts (see example 8
20、1, the independent parts may be numbered sequentially even if the independent parts are not similar units. This is particularly useful if some of the terminal functions are nominally the same. Example 8. Multiple-Function Integrated Circuit NOTE: The notations inside the flip-flop symbol outlines ar
21、e part of the logic symbols in accordance with ANSI/IEEE Std. 91-1984. The numerals 1 and 2 in Cl, lD, C2, and 2D are not related to the numbering of terminal functions or the flip-flops themselves. Terminal Function Terminal Function . Unit 1. (1st inverter) innut (11) 13 Unit 5. (2nd FF) noninvert
22、ed I 2 3 4 5 6 7 8 9 10 11 12 Unit 2; Unit 3, Unit 3, Unit 3, Unit 4, Unit 4, Unit 4, Unit 4, Unit 4, Unit 4, i2nd inverterj ou;p“t.(Zb) output&) (NAND) input No. 1 (311) 14 Unit 5, clear input input No. 2 (312) 15 Unit 5, inverted output (ST) output (30) (1st FF) clock (4CLK) 16 Unit 5, data input
23、(5D)_ preset input (4EE) 17 Unit 5, preset input (SPRE) 18 Unit 5, clock (SCLK) data input (4D) inverted output (47i) 19 Unit 6, (NOR) output (60) clear input (4cLP.j 20 Unit 6, input No. 1 (611) 21 Unit 6, input No. 2 (612) noninverted output (4Q) 22 Unit 2, input (21) Ground (GND) 23 Unit 1, outpu
24、t (10) 24 vcc EIA-321-C Page 6 3. Recommendations In semiconductor devices having more than one terminal of the same function, the terminal symbol (name) may be modified by adding a suffix number to the symbol or name, e.g., El, E2, etc. The suffix should be added on the came line as the symbol or n
25、ame, not as B subscript. In multiple-unit semiconductor devices, the terminal symbol or name may be modified by adding a prefix number to the symbol or name, e.g., lA, 2A, etc. The prefix should be added on the same line as the symbol or name. The foregoing recommendations may be applied in combinat
26、ion, as shown in examples 9 and 10. Example 9. Dual Double-Emitter Transistor Example 10. Dual Quad Buffers Terminal Function Terminal Function 1 Unit 1, collector (1C) 1 Unit 1, enable input (lc) 2 Unit 1, Base (1B) 2 Unit 1, input No. 1 (1Al) 3 Unit 1, emitter No. 1 (1El) 3 Unit 2, output No. 4 (2
27、Y4) 4 Unit 1, emitter No. 2 (lE2) 4 Unit 1, input No. 2 (lA2) 5 Unit 2, emitter No. 1 (2El) 5 Unit 2, output No. 3 (2Y3) 6 Unit 2, emitter (2E2) 6 Unit 1, input No. 3 (lA3) 7 Unit 2, base (2B) 7 Unit 2, output No. 2 (2Y2) 8 Unit 2, collector (2C) 8 Unit 1, input No. 4 (lA4) 9 Unit 2, output No. 1 (2
28、Yl) 10 Ground (GM) 11 Unit 2, input No. 1 (2Al) 12 Unit 1, output No. 4 (lY4) 13 Unit 2, input No. 2 (2A2) 14 Unit 1, output No. 3 (lY3) 15 Unit 2, input No. 3 (2A3) 16 Unit 1, output No. 2 (lY2) 17 Unit 2, input No. 4 (2A4) 18 Unit 1, output No. 1 (1x1) 19 Unit 2, enable input (2G) 20 “cc EIA-321-C
29、 Page 7 If there is no strong precedent for using a particular symbol for e particular terminal function and the device has several terminals with that function, it may be advantageous to use consecutive letters of the alphabet instead of a single symbol with suffix number. Example 11 shows a quadru
30、ple AND gate done both ways. Example 11. Quadruple AND Gate Alternative designations Terminal Function Terminal Function 1 Unit 1, input No. 1 (111) 1 Unit 1, input A (1A) 2 Unit 1, input No. 2 (112) 2 3 Unit 1, output (10) 3 4 Unit 2, input No. 1 (211) 4 5 Unit 2, input No. 2 (212) 5 6 Unit 2, outp
31、ut (20) 6 7 Ground (GND) 7 8 Unit 3, output (30) 8 9 Unit 3, input No. 1 (311) 9 10 Unit 3, input No. 2 (312) 10 11 Unit 4, output (40) 11 12 Unit 4, input No. 1 (411) 12 13 Unit 4, input No. 2 (412) 13 14 “cc 14 Unit 1, input B (1B) Unit 1, output (1Y) Unit 2, input A (2A) Unit 2, input B (28) Unit
32、 2, output (2Y) Ground (GND) Unit 3, output (3Y) Unit 3, input A (3A) Unit 3, input B (3B) Unit 4, output (4Y) Unit 4, input A (4A) Unit 4, input B (4B) “cc Rev. 9/02 Standard Improvement Form JEDEC The purpose of this form is to provide the Technical Committees of JEDEC with input from the industry
33、 regarding usage of the subject standard. Individuals or companies are invited to submit 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
34、10th Street Suite 240 South Arlington, VA 22201-2107 Fax: 703.907.7583 1. I recommend 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:
