VT8225 datasheet(1/4 Pages) ETC

номер детали	VT8225

подробное описание детали	Clock Generator

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производитель	ETC [List of Unclassifed Manufacturers]

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VIA Technologies, Inc.

VT8225

1045 Mission Court.

8th. Fl., No. 533

Fremont, CA 94539

Chung-cheng Rd.,Hsin-tien

USA

Taipei, Taiwan, R.O.C.

TEL: 1-510-683-3300 FAX: 1-510-683-3301

TEL: 886-2-218-5452 FAX: 886-2-218-5453

-1-

VT8225 Clock Generator

Date: July 5, 1994

Features

∗ Generates essential clock signals for the motherboard

∗ 4V to 7V operating supply range

∗ Supports 80286, 80386 and 80486 based designs

∗ Wide range of selectable output frequencies

∗ < 2ns skew between CPU and 2X CPU clock outputs

∗ Single low cost crystal (14.318Mhz) used as reference frequency

∗ Smooth transition on frequency switching

∗ 50% duty cycle

∗ Power down mode for low power consumption

∗ TTL or CMOS compatible outputs with 12mA drive capability

∗ Low, short and long term jitter

∗ 14 pin DIP and 14 pin SOIC (300 mil body) package options

Description

The VT8225 is a universal clock generator for motherboard design. The product at a glimpse:

1. Generates all kinds of required clocks for CPU and bus operation from 6 Mhz to 80 Mhz.

2. Eliminates at least two oscillators, which are oscillators for CPU and 14.318MHz oscillator.

3. Simplifies inventory: VT8225 covers required main clock for the motherboard design.

4. Provides a reliable clock for the PLL design.

5. Is pin-to-pin compatible to oscillator.

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