參數(shù)資料
型號(hào): ICS853006AGLFT
元件分類: 時(shí)鐘及定時(shí)
英文描述: 853006 SERIES, LOW SKEW CLOCK DRIVER, 6 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
封裝: 6.50 X 4.40 MM, 0.92 MM HEIGHT, LEAD FREE, MO-153, TSSOP-20
文件頁(yè)數(shù): 16/17頁(yè)
文件大小: 243K
代理商: ICS853006AGLFT
853006AG
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 9, 2004
8
Integrated
Circuit
Systems, Inc.
ICS853006
LOW SKEW, 1-TO-6
DIFFERENTIAL-TO-2.5V/3.3V LVPECL/ECL FANOUT BUFFER
APPLICATION INFORMATION
Figure 1 shows an example of the differential input that can be
wired to accept single ended levels. The reference voltage level
V
BB generated from the device is connected to the negative input.
FIGURE 1. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT
V
CC - 2V
50
50
RTT
Z
o = 50
Z
o = 50
FOUT
FIN
RTT =
Z
o
1
((V
OH + VOL) / (VCC – 2)) – 2
3.3V
125
125
84
84
Z
o = 50
Z
o = 50
FOUT
FIN
The clock layout topology shown below is a typical termina-
tion for LVPECL outputs. The two different layouts mentioned
are recommended only as guidelines.
FOUT and nFOUT are low impedance follower outputs that gen-
erate ECL/LVPECL compatible outputs. Therefore, terminating
resistors (DC current path to ground) or current sources must
be used for functionality. These outputs are designed to drive
50
transmission lines. Matched impedance techniques should
be used to maximize operating frequency and minimize signal
distortion.
Figures 2A and 2B show two different layouts which
are recommended only as guidelines. Other suitable clock lay-
outs may exist and it would be recommended that the board
designers simulate to guarantee compatibility across all printed
circuit and clock component process variations.
TERMINATION FOR 3.3V LVPECL OUTPUTS
FIGURE 2B. LVPECL OUTPUT TERMINATION
FIGURE 2A. LVPECL OUTPUT TERMINATION
WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS
The C1 capacitor should be located as close as possible to the
input pin.
PCLK
nPCLK
VBB
C1
0.1u
CLK_IN
VCC
相關(guān)PDF資料
PDF描述
ICS853011AMLF LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8
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ICS853011BGLFT 853011 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8
ICS853011BG 853011 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8
ICS853011BMLFT 853011 SERIES, LOW SKEW CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8
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