NOTES FOR CMOS DEVICES
1
PRECAUTION AGAINST ESD FOR SEMICONDUCTORS
Note:
Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and
ultimately degrade the device operation. Steps must be taken to stop generation of static electricity
as much as possible, and quickly dissipate it once, when it has occurred. Environmental control
must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using
insulators that easily build static electricity. Semiconductor devices must be stored and transported
in an anti-static container, static shielding bag or conductive material. All test and measurement
tools including work bench and floor should be grounded. The operator should be grounded using
wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions need
to be taken for PW boards with semiconductor devices on it.
2
HANDLING OF UNUSED INPUT PINS FOR CMOS
Note:
No connection for CMOS device inputs can be cause of malfunction. If no connection is provided
to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence
causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels
of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused
pin should be connected to V
DD
or GND with a resistor, if it is considered to have a possibility of
being an output pin. All handling related to the unused pins must be judged device by device and
related specifications governing the devices.
3
STATUS BEFORE INITIALIZATION OF MOS DEVICES
Note:
Power-on does not necessarily define initial status of MOS device. Production process of MOS
does not define the initial operation status of the device. Immediately after the power source is
turned ON, the devices with reset function have not yet been initialized. Hence, power-on does
not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until the
reset signal is received. Reset operation must be executed immediately after power-on for devices
having reset function.
Purchase of NEC Electronics I C components conveys a license under the Philips I C Patent Rights to use
these components in an I C system, provided that the system conforms to the I C Standard Specification as
defined by Philips.
2
2
2
2
IEBus and Inter Equipment Bus are registered trademarks of NEC Electronics Corporation.
V850 Series and V850/SG2 are trademarks of NEC Electronics Corporation.
Preliminary User’s Manual U16541EJ1V0UM
3
These commodities, technology or software, must be exported in accordance
with the export administration regulations of the exporting country.
Diversion contrary to the law of that country is prohibited.
License no needed:
µ
PD70F3261, 70F3261Y, 70F3263, 70F3263Y, 70F3271, 70F3271Y, 70F3273, 70F3273Y,
70F3281, 70F3281Y, 70F3283, 70F3283Y
The customer must judge the need for a license:
µ
PD703260, 703260Y, 703261, 703261Y, 703262, 703262Y, 703263, 703263Y, 703270,
703270Y, 703271, 703271Y, 703272, 703272Y, 703273, 703273Y, 703280, 703280Y,
703281, 703281Y, 703282, 703282Y, 703283, 703283Y
•
The information contained in this document is being issued in advance of the production cycle for the
product. The parameters for the product may change before final production or NEC Electronics
Corporation, at its own discretion, may withdraw the product prior to its production.
•
No part of this document may be copied or reproduced in any form or by any means without the prior written consent
of NEC Electronics. NEC Electronics assumes no responsibility for any errors that may appear in this document.
•
NEC Electronics does not assume any liability for infringement of patents, copyrights or other intellectual property
rights of third parties by or arising from the use of NEC Electronics products listed in this document or any other
liability arising from the use of such products. No license, express, implied or otherwise, is granted under any
patents, copyrights or other intellectual property rights of NEC Electronics or others.
•
Descriptions of circuits, software and other related information in this document are provided for illustrative purposes
in semiconductor product operation and application examples. The incorporation of these circuits, software and
information in the design of a customer's equipment shall be done under the full responsibility of the customer. NEC
Electronics assumes no responsibility for any losses incurred by customers or third parties arising from the use of
these circuits, software and information.
•
While NEC Electronics endeavors to enhance the quality, reliability and safety of NEC Electronics products,
customers agree and acknowledge that the possibility of defects thereof cannnot be eliminated entirely. To
minimize risks of damage to property or injury (including death) to persons arising from defects in NEC Electronics
products, customers must incorporate sufficient safety measures in their design, such as redundancy, fire-
containment and anti-failure features.
•
NEC Electronics products are classified into the following three quality grades: "Standard", "Special", and "Specific".
The "Specific" quality grade applies only to NEC Electronics products developed based on a customer-designated
"quality assurance program" for a specific application. The recommended applications of an NEC Electronics
product depend on its quality grade, as indicated below. Customers must check the quality grade of each NEC
Electronics products before using it in a particular application.
"Standard": Computers, office equipment, communications equipment, test and measurement equipment, audio and
visual equipment, home electronic appliances, machine tools, personal electronic equipment and
industrial robots.
"Special": Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life
support).
"Specific": Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support
systems and medical equipment for life support, etc.
The quality grade of NEC Electronics products is "Standard" unless otherwise expressly specified in NEC
Electronics data sheets or data books, etc. If customers wish to use NEC Electronics products in applications
not intended by NEC Electronics, they must contact an NEC Electronics sales representative in advance to
determine NEC Electronics' willingness to support a given application.
(Note)
(1) "NEC Electronics" as used in this statement means NEC Electronics Corporation and also includes its
majority-owned subsidiaries.
(2) "NEC Electronics products" means any product developed or manufactured by or for NEC Electronics (as
defined above).
M5 02. 11-1
4
Preliminary User’s Manual U16541EJ1V0UM
Regional Information
Some information contained in this document may vary from country to country. Before using any NEC
Electronics product in your application, pIease contact the NEC Electronics office in your country to
obtain a list of authorized representatives and distributors. They will verify:
•
•
•
•
•
Device availability
Ordering information
Product release schedule
Availability of related technical literature
Development environment specifications (for example, specifications for third-party tools and
components, host computers, power plugs, AC supply voltages, and so forth)
Network requirements
•
In addition, trademarks, registered trademarks, export restrictions, and other legal issues may also vary
from country to country.
NEC Electronics America, Inc. (U.S.)
Santa Clara, California
Tel: 408-588-6000
800-366-9782
Fax: 408-588-6130
800-729-9288
• Filiale Italiana
Milano, Italy
Tel: 02-66 75 41
Fax: 02-66 75 42 99
• Branch The Netherlands
Eindhoven, The Netherlands
Tel: 040-244 58 45
Fax: 040-244 45 80
• Tyskland Filial
Taeby, Sweden
Tel: 08-63 80 820
Fax: 08-63 80 388
• United Kingdom Branch
Milton Keynes, UK
Tel: 01908-691-133
Fax: 01908-670-290
NEC Electronics Hong Kong Ltd.
Hong Kong
Tel: 2886-9318
Fax: 2886-9022/9044
NEC Electronics Hong Kong Ltd.
Seoul Branch
Seoul, Korea
Tel: 02-528-0303
Fax: 02-528-4411
NEC Electronics (Europe) GmbH
Duesseldorf, Germany
Tel: 0211-65 03 01
Fax: 0211-65 03 327
• Sucursal en España
Madrid, Spain
Tel: 091-504 27 87
Fax: 091-504 28 60
• Succursale Française
Vélizy-Villacoublay, France
Tel: 01-30-67 58 00
Fax: 01-30-67 58 99
NEC Electronics Shanghai, Ltd.
Shanghai, P.R. China
Tel: 021-6841-1138
Fax: 021-6841-1137
NEC Electronics Taiwan Ltd.
Taipei, Taiwan
Tel: 02-2719-2377
Fax: 02-2719-5951
NEC Electronics Singapore Pte. Ltd.
Novena Square, Singapore
Tel: 6253-8311
Fax: 6250-3583
J02.11
Preliminary User’s Manual U16541EJ1V0UM
5
PCB Design
京公网安备 11010802033920号
EEWORLD
