UPC1830 datasheet(39/44 Pages) NEC

39 / 44 page

µPC1830

8. OPERATING PRECAUTIONS

8.1

µPC1830 External Components

(1) Resistors

Use E24 series resistors (approximately 5% precision) of 1/4 W or higher.

(2) Capacitors

• Ceramic capacitors of 1000 pF or below

Capacitors used for the time constant circuit. Basically use E12 series (10% precision) ones with the center value

= 0 in nominal temperature characteristic.

• Ceramic capacitors of 1000 pF or higher

Equivalent to capacitors for non-critical time constant circuits and for clamp, and bypass capacitors between power

supply and GND. Use E12 series (10% precision) ones. Use a type whose capacitance is not extremely affected

by temperature variations (ie. with an excellent temperature characteristic).

• Electrolytic capacitors

Use E6 series (20% precision) ones. Use ones whose capacitance is not extremely affected by temperature

variations (ie. with an excellent temperature characteristic).

(3) Crystal resonators

Use crystal resonators of 16 pF load type as shown below.

• For PAL

: 4.433 619 MHz (model name: HC-49/U, manufactured by Kinseki, Ltd.)

• For NTSC : 3.579 545 MHz (model name: TQC203A-8R (HC-49/U-10 type), manufactured by Toyo

Communication Equipment Co., Ltd.)

Note that use of crystal resonators other than the above may deteriorate electrical characteristics.

(4) Ceramic resonators

Use ceramic resonators as shown below.

• CSB500 F23 (manufactured by Murata Mfg. Co., Ltd.)

Note that use of ceramic resonators other than the above may deteriorate mainly electrical characteristics of the sync.

section.

UPC1830 bảng dữ liệu(PDF) 39 Page - NEC