音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

CY2273APVC-1 Datasheet

  • CY2273APVC-1

  • CPU SYSTEM CLOCK GENERATOR|CMOS|SSOP|48PIN|PLASTIC

  • 16頁(yè)

  • ETC

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

3A
CY2273A
Pentium
廬
/II, 6x86, K6 Clock Synthesizer/Driver for Desktop PCs
with Intel
廬
82430TX, 82440LX or ALI IV/IV+, AGP and 3 DIMMs
Features
鈥?Mixed 2.5V and 3.3V operation
鈥?Complete clock solution for Pentium
廬
, Pentium
廬
II,
Cyrix, and AMD processor-based motherboards
鈥?Four CPU clocks at 2.5V or 3.3V
鈥?Up to twelve 3.3V SDRAM clocks
鈥?Seven synchronous PCI clocks, one free-running
鈥?One 3.3V 48-MHz USB clock
鈥?One 2.5V IOAPIC clock (-3 option only)
鈥?Two AGP clocks at 60 or 66.6 MHz (-2 option only)
鈥?One 3.3V Ref. clock at 14.318 MHz
鈥?SPI Serial Configuration Interface
鈥?Factory-EPROM programmable output drive and slew
rate for EMI customization
鈥?Factory-EPROM programmable CPU clock frequencies
for custom configurations
鈥?Power-down, CPU stop and PCI stop pins
鈥?Available in space-saving 48-pin SSOP package
The CY2273A possesses power-down, CPU stop, and PCI
stop pins for power management control. These inputs are
multiplexed with SDRAM clock outputs, and are selected when
the MODE pin is driven LOW. Additionally, the signals are syn-
chronized on-chip, and ensure glitch-free transitions on the
outputs. When the CPU_STOP input is asserted, the CPU
clock outputs are driven LOW. When the PCI_STOP input is
asserted, the PCI clock outputs (except the free-running PCI
clock) are driven LOW. When the PWR_DWN pin is asserted,
the reference oscillator and PLLs are shut down, and all out-
puts are driven LOW.
The CY2273A outputs are designed for low EMI emissions.
Controlled rise and fall times, unique output driver circuits and
factory-EPROM programmable output drive and slew-rate en-
able optimal configurations for EMI control.
CY2273A Selector Guide
Clocks Outputs
CPU (60, 66.6, 75,
83.3 MHz)
CPU (60, 66.6 MHz)
SDRAM
PCI (30, 33.3 MHz)
USB/IR (48 MHz)
AGP (60 or 66 MHz)
IOAPIC (14.318 MHz)
Ref (14.318 MHz)
CPU-PCI delay
Note:
1. One free-running PCI clock.
CY2273A-3 only
-1
4
--
9/12
7
[1]
1
--
--
1
-2
4
--
9/12
5
[1]
1
2
--
1
-3
--
4
9/12
7
[1]
1
--
1
1
0 ns
-4
4
--
9/12
7
[1]
1
--
--
1
0 ns
Functional Description
The CY2273A is a clock synthesizer/driver for a Pentium, Pen-
tium II, Cyrix, or AMD processor-based PC using Intel鈥檚
82430TX, 82440LX, ALI Aladdin IV or Aladdin IV+ chipsets.
The CY2273A-1 outputs four CPU clocks at 2.5V or 3.3V with
up to 83.3MHz operation. There are seven PCI clocks, running
at 30 and 33.3MHz. One of the PCI clocks is free-running.
Additionally, the part outputs up to twelve 3.3V SDRAM clocks,
one 3.3V USB clock at 48 MHz, and one 3.3V reference clock
at 14.318 MHz. The CY2273A-2 is similar, except that
PCICLK4 and PCICLK5 are now AGP clocks. The CY2273A-3
is more suited to Pentium II systems, as it outputs one 2.5V
IOAPIC clock. Finally, the CY2273A-4 is similar to the
CY2273A-1 except that is supports 0-ns CPU-PCI delay.
1鈥?.5 ns 1鈥?.5 ns
Logic Block Diagram
IOAPIC
V
DDQ2
XTALIN
XTALOUT
14.318
MHz
OSC.
REF0 (14.318 MHz)
CPU
PLL
STOP
LOGIC
CPUCLK [0-3]
V
DDCPU
SEL0
SEL1
CY2273A-1,-2,-4 only
EPROM
SDRAM5/PWR_DWN
SDRAM [0-4],[8-11]
SDRAM6/CPU_STOP
MODE
Delay (-1,-2 option)
SYS PLL
/1 or /1.25
SDRAM7/PCI_STOP
CY2273A-2 only
AGP [0,1]
/1 or /2
SERIAL
INTERFACE
CONTROL
LOGIC
STOP
LOGIC
PCI [0-5], PCI [0-3]
PCICLK_F
USBCLK (48 MHz)
SCLK
SDATA
Intel and Pentium are registered trademarks of Intel Corporation.
Cypress Semiconductor Corporation
Document #: 38-07214 Rev. **
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134 鈥?408-943-2600
Revised November 15, 2001

CY2273APVC-1相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    133-MHz Spread Spectrum Clock Synthesizer/Driver with AGP, U...
    CYPRESS
  • 英文版
    133-MHz Spread Spectrum Clock Synthesizer/Driver with AGP, U...
    CYPRESS [C...
  • 英文版
    Clocks and Buffers
    ETC
  • 英文版
    Direct Rambus? Clock Generator (Lite)
    CYPRESS
  • 英文版
    High-Frequency Programmable PECL Clock Generator
    CYPRESS
  • 英文版
    High-Frequency Programmable PECL Clock Generator
    CYPRESS [C...
  • 英文版
    133-MHz Spread Spectrum Frequency Timing Generator
    Cypress
  • 英文版
    133-MHz Spread Spectrum Clock Synthesizer/Driver With Differ...
    CYPRESS
  • 英文版
    133-MHz Spread Spectrum Clock Synthesizer/Driver With Differ...
    CYPRESS [C...
  • 英文版
    CPU System Clock Generator
    ETC
  • 英文版
    CPU System Clock Generator
  • 英文版
    CPU System Clock Generator
    ETC
  • 英文版
    CPU System Clock Generator
  • 英文版
    Pentium and Cyrix 6x86 Compatible Clock Synthesizer/Driver f...
    Cypress
  • 英文版
    CPU System Clock Generator
    ETC
  • 英文版
    CPU System Clock Generator
  • 英文版
    Pentium Pentium?Pro, and Cyrix?6x86Compatible Clock Synthes...
    Cypress
  • 英文版
    Pentium 6x86, K6 Clock Synthesizer/Driver for Mobile PCs wi...
    Cypress
  • 英文版
    100-MHz Pentium II Clock Synthesizer/Driver with Spread Spec...
    CYPRESS
  • 英文版
    100-MHz Pentium II Clock Synthesizer/Driver with Spread Spec...
    CYPRESS [C...

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！