參數(shù)資料
型號(hào)： MAX9451EHJ
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 時(shí)鐘及定時(shí)
英文描述： High-Precision Clock Generators with Integrated VCXO
中文描述： 9451 SERIES, PLL BASED CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32
封裝： 5 X 5 MM, 1 MM HEIGHT, MS-026-AAA-HD, TQFP-32
文件頁(yè)數(shù)： 14/18頁(yè)
文件大?。?/td> 323K
代理商： MAX9451EHJ
M
High-Precision Clock Generators
with Integrated VCXO
14
______________________________________________________________________________________
REGISTER
CR0
CR1
CR2
CR3
CR4
ACTION
DEFAULT
P = 1
M = 1
M = 1
N0 = 1
N1 = 1
1. Outputs enable
2. IN0 is the default input
3. Both inputs are enabled by
SEL0 and SEL1
4. Monitor is nonrevertive
5. Holdover is disabled
Status
Reserved
00000000
00000000
00000000
00000000
00000000
CR5, CR6
CR5: 01100000
CR6: 00000000
CR7
CR8
00000000
00000000
Table 10. Register Default Values at Power-Up
CR5, CR6
FUNCTION
STATE
CR5[7]
Output disable
0: Outputs are enabled
1: Outputs disabled to logic-low
0: CLK0 is disabled to high impedance (overrides CR5[7] = 1 setting)
1: CLK0 is enabled
0: CLK1 is disabled to high impedance (overrides CR5[7] = 1 setting)
1: CLK1 is enabled
0: IN0 is the default input
1: IN1 is the default input
00: The selection is controlled by SEL0, SEL1 (see Table 2)
01: Enable IN0, disable IN1
10: Enable IN1, disable IN0
11: Enable both IN0 and IN1
0: The function is not activated
1: The function is activated
C LK m oni or i s r eset i n r ever m od e: IN T = 0 and C R7[ 7] = 0, and the P LL sw ches to the d efaul i np ut
0: Holdover function is disabled
1: Holdover function is enabled
0: Holdover is in normal mode
1: Holdover is forced to be activated
As the bit goes from 0 to 1, the current VCXO frequency is taken as the nominal value
As this bit is toggling from 0 to 1, the current VCXO frequency is taking as the nominal holdover
value
The bit acts at the same as the input MR; CR6[4] = 1, the chip is reset
This bit is always set to zero
CR6[2] = 0: DIV0 output drives CLK2
CR6[2] = 1: DIV1 output drives CLK2
CR6[1] = 0 PLL controls the Xtal frequency
CR6[1] = 1 Xtal frequency is controlled by the acquired value (acquired at rising edge of CR6[5])
—
CR5[6]
CLK0 enabling
CR5[5]
CLK1 enabling
CR5[4]
Default input
setting
CR5[3:2]
Input enabling
CR5[1]
Revert function
CR5[0]
CLK monitor reset
Holdover function
enabling
CR6[7]
CR6[6]
Forced holdover
CR6[5]
Acquiring nominal
VCXO frequency
Master reset
REF
CR6[4]
CR6[3]
CR6[2]
ODIV select
CR6[1]
Acquire select
CR6[0]
Reserved
Table 8. Control Registers and Control Functions
CR7
CR7[6]
CR7[5]
FUNCTION
Status of IN0
Status of IN1
Input clock
selection indicator
STATE
0: Normal
1: Failure detected
CR7[4]
0: IN0 is currently used
1: IN1 is currently used
1: PLL not locked
0: PLL locked
1: Device is in holdover state
0: Device is in normal state
—
CR7[3]
LOCK indicator
CR7[2]
Holdover status
CR7[1:0]
Reserved
Table 9. Mapping for the Input Monitor Status
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參數(shù)描述
MAX9451EHJ+ 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MAX9451EHJ+T 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MAX9451EHJ-T 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
MAX9451EVKIT+ 制造商:Microsemi Corporation 功能描述:MAX9451 EVALUATION KIT - Boxed Product (Development Kits) 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:KIT EVALUATION MAX MAX9451 制造商:Microsemi Corporation 功能描述:KIT EVALUATION MAX MAX9451
MAX9452EHJ 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 High-Precision Clock Generator RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
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