参数资料
型号: CY28419OCT
厂商: Silicon Laboratories Inc
文件页数: 8/15页
文件大小: 0K
描述: IC CLOCK SRC CK409B 56SSOP
标准包装: 1,000
类型: *
PLL:
输入: 晶体
输出: 时钟
电路数: 1
比率 - 输入:输出: 1:25
差分 - 输入:输出: 无/是
频率 - 最大: 400MHz
除法器/乘法器: 是/无
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 70°C
安装类型: *
封装/外壳: *
供应商设备封装: *
包装: *
CY28419
........................Document #: 38-07444 Rev. *D Page 2 of 15
Pin Description
Pin No.
Pin Name
Pin Type
Pin Description
1,2
REF(0:1)
O, SE
Reference Clock. 3.3V 14.318-Mz clock output.
4XIN
I
Crystal Connection or External Reference Frequency Input. This pin has dual
functions. It can be used as an external 14.318-MHz crystal connection or as an
external reference frequency input.
5XOUT
O, SE
Crystal Connection. Connection for an external 14.318-MHz crystal output.
41,44,47,50
CPUT(0:3)
O, DIF
CPU Clock Output. Differential CPU clock outputs. See Table 1 for frequency config-
uration.
40,43,46,49
CPUC(0:3)
O, DIF
CPU Clock Output. Differential CPU clock outputs. See Table 1 for frequency config-
uration.
38, 37
SRCT, SRCC
O, DIF
Differential serial reference clock.
22,23,26,27
3V66(3:0)
O, SE
66 MHz Clock Output. 3.3V 66-MHz clock from internal VCO.
29
3V66_4VCH
O, SE
48/66 MHz Clock Output. 3.3V selectable through SMBus to be 66 or 48 MHz.
7,8,9
PCIF(0:2)
O, SE
Free Running PCI Output. 33-MHz clocks divided down from 3V66.
12,13,14,15,
18,19,20
PCI(0:6)
O, SE
PCI Clock Output. 33-MHz clocks divided down from 3V66.
31,
USB_48
O, SE
Fixed 48 MHz clock output.
32
DOT_48
O, SE
Fixed 48 MHz clock output.
51,56
FS_A, FS_B
I
3.3V LVTTL input for CPU frequency selection.
52
IREF
I
Current Reference. A precision resistor is attached to this pin which is connected to
the internal current reference.
21
PD#
I, PU
3.3V LVTTL input for power-down# active LOW.
35
VTT_PWRGD#
I
3.3V LVTTL input is a level-sensitive strobe used to latch the FS0 input (active
LOW).
30
SDATA
I/O
SMBus-compatible SDATA.
28
SCLK
I
SMBus-compatible SCLOCK.
53
VSS_IREF
GND
Ground for current reference.
55
VDD_A
PWR
3.3V power supply for PLL.
54
VSS_A
GND
Ground for PLL.
42,48
VDD_CPU
PWR
3.3V power supply for outputs.
45
VSS_CPU
GND
Ground for outputs.
36
VDD_SRC
PWR
3.3V power supply for outputs.
39
VSS_SRC
GND
Ground for outputs.
34
VDD_48
PWR
3.3V power supply for outputs.
33
VSS_48
GND
Ground for outputs.
10,16
VDD_PCI
PWR
3.3V power supply for outputs.
11,17
VSS_PCI
GND
Ground for outputs.
24
VDD_3V66
PWR
3.3V power supply for outputs.
25
VSS_3V66
GND
Ground for outputs.
3
VDD_REF
PWR
3.3V power supply for outputs.
6
VSS_REF
GND
Ground for outputs.
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