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參數(shù)資料
| 型號： | ICS1493K-17LFT |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 0K |
| 描述： | IC CLOCK SYNTHESIZER 20-VFQFPN |
| 標準包裝： | 2,500 |
| 類型： | 時鐘/頻率合成器，扇出配送，擴展頻譜時鐘發(fā)生器 |
| PLL： | 帶旁路 |
| 輸入： | 時鐘，晶體 |
| 輸出： | 時鐘 |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:5 |
| 差分 - 輸入:輸出： | 無/無 |
| 頻率 - 最大： | 48MHz |
| 除法器/乘法器： | 無/無 |
| 電源電壓： | 1.7 V ~ 2 V |
| 工作溫度： | -10°C ~ 80°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 20-VFQFPN（4x4） |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 1493K-17LFT |
PRELIMINARY DATASHEET
CLOCK SYNTHESIZER FOR PORTABLE SYSTEMS
ICS1493-17
IDT / ICS CLOCK SYNTHESIZER FOR PORTABLE SYSTEMS
1
ICS1493-17
REV A 101005
Description
The ICS1493-17 is a low-power, low-jitter clock
synthesizer designed to replace multiple crystals and
oscillators in portable audio/video systems. The device
generates a 37 MHz processor clock, a 48 MHz USB
clock, a fixed 22.5792 MHz audio clock, a selectable
24.576 MHz or 22.5792 MHz audio clock, and a 27MHz
reference clock for video. Using ICS’ proprietary mix of
analog and digital Phase-Locked Loop (PLL)
technology, the device spreads the frequency spectrum
of the 37 MHz output, reducing the peak amplitude of by
up to 16 dB. An output enable (OE) pin lowers the chip
power consumption while tri-stating all outputs.
Features
Extremely low operating current (11 mA)
Packaged in 20-pin QFN (Pb-free)
Input crystal or clock frequency of 27 MHz
Output reference frequency of 27 MHz
Fixed output frequencies of 37 MHz, 48 MHz and
22.5792 MHz
Selectable output frequency of either 22.5792 MHz
or 24.576 MHz
Configurable spread spectrum on 37 MHz output
Operating core voltage of 1.8 V
Output voltage of 1.8 V or 2.5 V
Advanced, low-power CMOS process
Block Diagram
X1
X2
PLL1
(Spread)
PLL2
Crystal
Oscillator/
Clock
Buffer
27 MHz
clock or
crystal input
Optional tuning
capacitors
VDD
GND
27M
37M
3
5
PLL3
22/24M
PLL4
22M
SCK
48M
IIC
Control
Logic
SDATA
OE
VDDO
2
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