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參數(shù)資料
| 型號(hào)： | ICS2494N-XXX |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 135 MHz, VIDEO CLOCK GENERATOR, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大?。?/td> | 426K |
| 代理商： | ICS2494N-XXX |
Dual Video/Memory Clock Generator
New Features
Buffered XTAL Out
Integral loop filter components
Fast acquisition of selected frequencies, strobed or non-
strobed
Guaranteed performance up to 135 MHz
Excellent power supply rejection
Advanced PLL for low phase-jitter
Frequency change detection circuitry which enhances new
frequency acquisition and eliminates problems caused by
programs that rewrite frequency information.
Improved pinout - easier board layout.
Description
The Dot Clock Generator is an integrated circuit dual phase-
locked loop frequency synthesizer capable of generating six-
teen video dot clock frequencies and eight memory clock
frequencies for use with high performance video display sys-
tems. Utilizing CMOS technology to implement all linear,
digital and memory functions, the ICS2494/94A provides a
low-power, small-footprint, low-cost solution to the generation
of video dot clocks. Outputs are compatible with XGA, VGA,
EGA, MCGA, CGA, MDA, as well as the higher frequencies
needed for advanced applications in desktop publishing and
workstation graphics. Provision is made via a single-level
custom mask to implement customer-specific frequency sets.
Phase-locked loop circuitry permits rapid glitch-free transi-
tions between clock frequencies.
Integrated
Circuit
Systems, Inc.
ICS2494
ICS2494A
Applications
VGA-Super VGA-XGA video adapters
Workstations
8514A-TMS34010-TMS34020
Motherboard
Notes:
1. In applications where the external frequency input is not specified,
EXTFREQ must be tied to Vss.
2. ICS2494/94AM(SOIC) pinout is identical to ICS2494/94AN(DIP).
Features
World standard ICS2494A has been reconfigured
to allow 8 memory frequencies.
Mask-programmable frequencies
Pre-programmed versions for Industry Standard
VGA chips
Glitch-free frequency transitions
Provision for external frequency input
Internal clock remains locked when the external
frequency input is selected
Low power CMOS device technology
Small footprint - 20-pin DIP or SOIC
2494/94ARevA090694
XTAL1
1
20
DVDD
XTAL
2
19
VCLK
EXTFREQ
3
18
XTALOUT
FS0
4
17
VSS
FS1
5
16
VSS
STROBE
6
15
AVDD
FS2
7
14
VSS
FS3
8
13
DVDD
MS0
9
12
MCLK
MS0
10
11
MS1
20-Pin DIP or SOIC
Pin Configuration
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS2495N-XXX | 135 MHz, VIDEO CLOCK GENERATOR, PDIP16 |
| ICS2496M-456 | 110 MHz, VIDEO CLOCK GENERATOR, PDSO16 |
| ICS2496N-454 | 80 MHz, VIDEO CLOCK GENERATOR, PDIP16 |
| ICS2509CYG-T | 2509 SERIES, PLL BASED CLOCK DRIVER, 9 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
| ICS2509CYGLF-T | PLL BASED CLOCK DRIVER, 9 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS2495 | 制造商:ICS 制造商全稱:ICS 功能描述:Dual Video/Memory Clock Generator |
| ICS2495M | 制造商:ICS 制造商全稱:ICS 功能描述:Dual Video/Memory Clock Generator |
| ICS2495M-XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| ICS2495N | 制造商:ICS 制造商全稱:ICS 功能描述:Dual Video/Memory Clock Generator |
| ICS2495N-XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
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