Part Numbers

A part number is configured with a combination of numerals and letters.
From the left, the part number indicates the family, product number, modification classification, package classification, and custom number (etc.).

Each item in the configuration differs depending on the product or family.

The whole part number cannot be marked on small-size products, so the part number is indicated using a portion of the number or a symbol, etc.
An inspection symbol or manufacture code may also be marked in addition to the part number.

The first two or three digits indicate the family type, in compliance with the naming rules of the Japan Electronics and Information Technology Industries Association (JEITA).

Type	Category
1S	Diode
2SA	Bipolar-type transistor	PNP, for high frequency
2SB		PNP, for low frequency
2SC		NPN, for high frequency
2SD		NPN, for low frequency
2SJ	Field-effect-type transistor (FET)	P-channel
3SJ		P-channel (2 gates)
2SK		N-channel
3SK		N-channel (2 gates)
2SF	Thyristor

Remarks 1.	Product names starting with 1N or 2N follow the American naming format.
2.	Product names starting with the following codes are original to NEC Electronics.
	RD, NNCD, NSAD	:	Zener diode
	NE	:	RF & microwave transistor, FET
	NDL, NR, NX	:	Optical diode for communication (NDL: obsolete)
	PS	:	Photocoupler, optical MOS (SSR) device
	PH	:	Light receiver element
	NV	:	Visible laser diode (obsolete)

These are named in accordance with NEC Electronics' original naming format.

The part numbers are described here using the uPD78064 as an example.

Family type	Product number	Revision	Function classification	Package type	Quality grade	Custom code/ speed classification, etc.	Detailed package classification	Taping	Lead (Pb)-free
uPD	78064	B		GC	(A)	-011	-8EU		-A

uPD78064 is a mask ROM type product.
If a P is inserted in the product number (like uPD78P064), it indicates a PROM type product.
If an F is inserted in the product number (like uPD78F064), it indicates a flash ROM type product.

Field	Code	Description
Family type	uPA	Array element
	uPB	Bipolar	Digital IC
	uPC		Linear IC
	uPD	MOS digital IC
	uPG	Compound device (GaAs, etc.)
Product number	The product number is described using numerals, but may also include letters.
Revision	The chip revision number is expressed as a single letter (the revision number increases in alphabetical order). First releases (products that haven't been revised) have no revision indication.
Function classification	Microcontrollers with an on-chip I2C function have "Y" added.
Package type	The package type is indicated by 1 or 2 letters.
	A	Metallic
	B	Ceramic
	C, CW	Plastic DIP, plastic SDIP
	D	Ceramic DIP
	Fx	BGA, LGA
	Gx	QFP, SOP, TSOP, SSOP
	Hx	SIP
	Mx	Part of SSOP
	Nx	BGA
	Sx	BGA, PGA
Quality grade	The quality grade is described using characters such as (A), (A1), or (A2). These characters indicate special quality grades. For details of the quality grades used by NEC Electronics, see the document "Quality Grades on NEC Semiconductor Devices".
Custom code/ speed classification, etc.	ICs such as ROMs and ASICs manufactured based on an order from the customer have a 3-digit custom code attached. This field is not included in the part names of general-purpose products. Some products may also include other items such as the speed classification—frequency or memory access time—in this field.
Detailed package classification	Some packages such as QFPs or SOPs may indicate the size or pin pitch in this field.
Taping	For products shipped on a tape reel, codes such as -E1 and -E2 are added to show the direction of the product on the tape.
Lead (Pb)-free	A lead-free identification code, such as -A and -AZ, is suffixed to the product number of lead-free products.

Remark

Some products may have characters such as /JM suffixed to their part numbers. These characters indicate where the product was manufactured. The first character after the slash indicates the country where the manufacturer of the IC diffusion processing is located, and the second character indicates the country where the product was assembled. In the case of /JM, the J stands for Japan, and the M for Malaysia. If two products have the same part number except for these characters, the functions, performance (i.e., electrical specifications described in the data sheet) and package of the products are the same, regardless of where the product was manufactured.

(2008/07)

3-pin regulators are basically named in accordance with "FAQ name-0004 ICs and array elements". Their names have the following features to express the characteristics and performance of the 3-pin regulators (with some exceptions such as the uPC305, uPC317, and uPC337, which are not named in accordance with the following description).

A list of currently mass-produced products is shown on the following Web page.
http://www.necel.com/linear/en/product/series.html

An example of the

uPD121W33AT1F-E1-AT

is given below.

The part number expresses the features and performance of the 3-pin regulators, as follows.












Unlike the symbol of the other general ICs, the symbol indicating the package type of the 3-pin regulator is as follows.


For details of the package, see the following Web page (Package Information of Discrete Products).

Pin insertion	:	http://www.necel.com/discrete/en/package/thd.html
Surface mount	:	http://www.necel.com/discrete/en/package/smd.html

For the meaning of the symbol of taping packing, see the following Web page.
http://www.necel.com/pkg/en/pack/p_gaiyou_02.html

Related FAQ
http://www.necel.com/en/faq/f_name.html#0005
http://www.necel.com/en/faq/f_ship.html#0001



For the meaning of the lead-free symbol, see the following Web page.
http://www.necel.com/pb_free/en/identifi.html

Related FAQ
http://www.necel.com/en/faq/f_pb.html#0002

(2008/04)

(Zener diodes are named in accordance with NEC Electronics' original naming format.)
The part number is explained below using the RD Series as an example.

(2006/09)

Why a product name is printed as "UPD***" on the label of a packaging box, while the official name is "μPD***"?

μPD of μPD*** is a registered trademark of NEC Electronics (Note).
μ is used in official documents such as Data Sheets. In general documents that are created uisng the IT system, however, U is used instead because the keyboard of a PC does not have μ.

(Note) μPA, μPB, μPC, and μPD are registered trademarks of NEC Electronics.

Products in tape packing containers in reel shipments bear markings such as -E1, -E2, -T1, and -T2, where the numeral (1, 2) indicates the direction in which the product is fixed to the tape.
For details, refer to the description of the Shipping Form.
In the case of -E1 and -E2 (or -T1B, -T2B in the case of 3-pin minimold (SC-59)), embossed taping is used, with each product placed in a depression in the resin tape and covered with resin film to hold it in place.
In the case of -T1 and -T2, adhesive taping was originally used, with each product fixed to an adhesive area on the paper tape, without devices being encapsulated in tape.
However, initially, -T1 and -T2 were also sometimes used for embossed taping.
Now, adhesive tape packing containers are no longer manufactured.

(2007/02)