- 您现在的位置：买卖IC网 > PDF目录61067 > ICS2496M-XXX-LF (INTEGRATED DEVICE TECHNOLOGY INC) 135 MHz, VIDEO CLOCK GENERATOR, PDSO16 PDF资料下载
参数资料
| 型号： | ICS2496M-XXX-LF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 135 MHz, VIDEO CLOCK GENERATOR, PDSO16 |
| 封装： | SOIC-16 |
| 文件页数： | 2/7页 |
| 文件大小： | 326K |
| 代理商： | ICS2496M-XXX-LF |
Figure 1
VCLK
XTALOUT
PWRDN
MCLK
MS1
EXTFREQ
VS0
VS1
STROBE
VS2
VS3
MS0
10
C3
C2
.1
22
ICS2496
5.0V
NOTES:
FS3-FS0, MS1-MS0, EXTFREQ, and STROBE inputs are all equipped with pull-ups and need not be tied high.
PWRDN input has an internal pull-down and must be driven or tied high for full device function.
Mount decoupling capacitors as close as possible to the device and connect device ground to the ground plane where available.
Mount crystal and its circuit traces away from switching digital lines and the VCLK, MCLK, and XTALOUT lines.
Reference Oscillator and Crystal Selection
In cases where the on-chip crystal oscillator is used to generate
the reference frequency, the accuracy of the crystal oscillation
frequency will have a very small effect on output accuracy.
The external crystal and the on-chip circuit implement a Pierce
oscillator. In a Pierce oscillator, the crystal is operated in its
parallel-resonant (also called anti-resonant) mode. This means
that its actual frequency of oscillation depends on the effective
capacitance that appears across the terminals of the quartz
crystal. Use of a crystal that is characterized for use in a
series-resonant circuit is fine, although the actual oscillation
frequency will be slightly higher than the value stamped on the
crystal can (typically 0.025%-0.05% or so). Normally, this
error is not significant in video graphics applications, which is
why the ICS2496 will typically derive its frequency reference
from a series-resonant crystal connected between pins 1 and
16.
As the entire operation of the phase-locked loop depends on
having a stable reference frequency, the crystal should be
mounted as close as possible to the package. Avoid routing
digital signals or the ICS2496 outputs underneath or near these
traces. It is also desirable to ground the crystal can to the ground
plane, if possible.
Circuit Function and Application
“Power-down”
The ICS2496 has been optimized for use in battery operated
portables. It can be placed in a power-down mode which drops
its supply current requirement below 1 microamp. When
placed in this mode, the digital inputs FS0-3, STROBE, MS0-
1, and EXTFREQ may be either high or low or floating without
causing an increase in the ICS2496 supply current.
The PWRDN pin must be low (It has an internal pull-down.)
in order to place the device in its low power state. The output
pins (VCLK and MCLK) are driven high and XTALOUT is
driven low by the ICS2496 when it is in its low power state.
If a crystal is being used, nothing needs to be done to achieve
low power. If XTAL1 is being driven by an external source, it
may be driven low or high without a power penalty. If XTAL1
is at an intermediate voltage (V SS +0.5V < VIN < VDD -0.5),
there will be a small increase in supply current . If XTAL1 is
driven at 14.318 MHz while the chip is in power-down, the
ICS2496 supply current will increase to approximately 1.2
mA.
The STROBE (pin 5) may be used to guard against inadvert-
ent frequency changes during power-down/power-up se-
quences. By holding the STROBE low during power-down and
power-up sequences, the ICS2496 will retain the most recent
video frequency selection.
Power Supply Conditioning
The ICS2496 is a member of the second generation of dot clock
products. By incorporating the loop filter on chip and upgrad-
ing the VCO, the ease of application has been substantially
improved over earlier products. If a stable and noise-free power
supply is available, no external components are required. How-
ever, in most applications it is judicious to decouple the power
supply as shown in Figure 1.
ICS2496
2
相关PDF资料 |
PDF描述 |
|---|---|
| ICS2510G | 2510 SERIES, PLL BASED CLOCK DRIVER, 10 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
| ICS251PMLFT | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS252MP | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS252MIPLF | 200 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| ICS2694M-XXX | 135 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS2496N-452 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Video/Graphics Clock Generator |
| ICS2496N-454 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Video/Graphics Clock Generator |
| ICS2496N-456 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Video/Graphics Clock Generator |
| ICS2496N-XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral IC |
| ICS2509 | 制造商:ICS 制造商全称:ICS 功能描述:3.3V Phase-Lock Loop Clock Driver |
发布紧急采购，3分钟左右您将得到回复。