參數(shù)資料
型號(hào): CDC9441
廠商: Texas Instruments, Inc.
英文描述: DVD System Clock Synthesizerers(PC時(shí)鐘合成器/驅(qū)動(dòng)器(SDRAM 時(shí)鐘支持))
中文描述: DVD系統(tǒng)時(shí)鐘Synthesizerers(電腦時(shí)鐘合成器/驅(qū)動(dòng)器(SDRAM的時(shí)鐘支持))
文件頁(yè)數(shù): 10/14頁(yè)
文件大?。?/td> 275K
代理商: CDC9441
CDC9441
PC CLOCK SYNTHESIZER/DRIVER
WITH SDRAM CLOCK SUPPORT
SCAS578 – AUGUST 1996
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
tr
tf
2 V
1.25 V
0.4 V
2.5-V CLOCK WAVEFORMS
tc
tw
NOTES: A. CL includes probe and jig capacitance.
CL = 20 pF (CPUn, IOAPICn, REF1)
CL = 30 pF (PCIn, PCI_F, SDRAMn)
CL = 45 pF (REF0)
B. All input pulses are supplied by generators having the following characteristics: PRR
10 MHz, ZO = 50 W, tr
2.5 ns, tf
2.5 ns.
C. The outputs are measured one at a time with one transition per measurement.
D. Duty cycle = (tw
÷
tc)
×
100%
tr
tf
2.4 V
1.5 V
0.4 V
3.3-V CLOCK WAVEFORMS
tc
tw
Figure 1. Load Circuit and Voltage Waveforms
P
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