The product manufacturing codes marked on the envelopes of discrete semiconductors and ICs are listed in full in specification SNW-SZ-602. For discrete semiconductors the code is a single upper-case or lower-case letter identifying the centre where the component is manufactured. For ICs the code is a single letter or figure identifying where diffusion and/or assembly and/or final (QA) test is carried out. The following lists give the codes for the most important Manufacturing Centres.

Codes for discrete semiconductors

Code D
Philips Semiconductors, Hamburg, Germany

Code E
Philips Semiconductors, Hazel Grove, UK

Code F
Philips Semiconductors, Stadskanaal, The Netherlands

Code H
Philips Semiconductors, Nijmegen, The Netherlands

Code P
Electronic Devices Ltd. (EDL), Hong Kong

Code W
Philips Semiconductors Guangdong, China

Code m
Philips Semiconductors Philippines Inc., Cabuyao, Philippines

Code t
PSS, Seremban, Malaysia.

Codes for ICs

Diffusion: B
Assembly: -
Responsible Centre: -
San Antonio

Diffusion: C/F/V
Assembly: -
Responsible Centre: C
Albuquerque (fab 4î/6î/8î)

Diffusion: D
Assembly: -
Responsible Centre: D
Hamburg

Diffusion: -
Assembly: -
Responsible Centre: G
Southampton

Diffusion: H/P/T/U
Assembly: -
Responsible Centre: H
Nijmegen (CS/MOS-3/MOS-4/MOS-2)

Diffusion: -
Assembly: -
Responsible Centre: I
Gratkorn, Austria

Diffusion: J/M
Assembly: -
Responsible Centre: J
Caen (fab 5î/6î

Diffusion: -
Assembly: -
Responsible Centre: M
Zurich

Diffusion: -
Assembly: P
Responsible Centre: -
Calamba

Diffusion: -
Assembly: S
Responsible Centre: -
Kaohsiung

Diffusion: Y
Assembly: -
Responsible Centre: -
Shanghai

Diffusion: Z
Assembly: -
Responsible Centre: -
Singapore

Diffusion: 6
Assembly: -
Responsible Centre: -
Limeil

Diffusion: b
Assembly: -
Responsible Centre: -
Boblingen

Diffusion: k
Assembly: -
Responsible Centre: -
Hsin-Chu

Diffusion: -
Assembly: -
Responsible Centre: m
Taipe

Diffusion: -
Assembly: n
Responsible Centre: -
Bangkok

Diffusion: r
Assembly: -
Responsible Centre: r
Sunnyvale

Codes for ICs

As Fig. 1 shows, the top side of an integrated circuit from Philips Semiconductors contains identification marking. This marking normally comprises three lines (A, B, and C) of text and the Philips logo.

Line A contains the commercial type number and optional designations for crystal technology and for package type.

Line B contains the diffusion lot number and a 2-digit assembly sequence number, for traceability to the assembly batch.

Line C contains three code letters designating the diffusion centre, the assembly centre, and the centre of responsibility, followed by the assembly year and week date code (YYWW), the mask layout version and the release status code (blank for released products, X for development samples or Y for qualification samples). For the code letters of the centres see "Product manufacturing codes".

IC marking examples

A typical example of IC marking is:
Line A: 74HL33534D
Line B: K3P08604
Line C: Hnn9322 A X

On very small packages the marking is condensed by truncating the information into two lines.

TDA1541 markings Fig. 1 The IC marking format.