参数资料
型号: ICS853013AMT
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟及定时
英文描述: 853013 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
封装: 7.50 X 12.80 MM, 2.30 MM HEIGHT, MS-013, MO-119, SOIC-20
文件页数: 2/18页
文件大小: 745K
代理商: ICS853013AMT
ICS853013
LOW SKEW, DUAL,1-TO-3, DIFFERENTIAL-TO-2.5V, 3.3V, 5V LVPECL/ECL FANOUT BUFFER
IDT / ICS 2.5V, 3.3V, 5V LVPECL/ECL FANOUT BUFFER
10
ICS853013AM REV. B FEBRUARY 7, 2008
Recommendations for Unused Output Pins
Inputs:
PCLK/nPCLK INPUTS
For applications not requiring the use of a differential input, both
the PCLK and nPCLK pins can be left floating. Though not
required, but for additional protection, a 1k
resistor can be tied
from PCLK to ground. For applications
LVCMOS Control Pins
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
resistor can be used.
Outputs:
LVPECL Outputs
All unused LVPECL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential output
pair should either be left floating or terminated.
Termination for 3.3V LVPECL Outputs
The clock layout topology shown below is a typical termination for
LVPECL outputs. The two different layouts mentioned are
recommended only as guidelines.
FOUT and nFOUT are low impedance follower outputs that
generate 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 3A and 3B show two different layouts which are
recommended only as guidelines. Other suitable clock layouts may
exist and it would be recommended that the board designers
simulate to guarantee compatibility across all printed circuit and
clock component process variations.
Figure 3A. 3.3V LVPECL Output Termination
Figure 3B. 3.3V LVPECL Output Termination
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
相关PDF资料
PDF描述
ICS853014AG LOW SKEW CLOCK DRIVER, 5 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
ICS853014AGLF LOW SKEW CLOCK DRIVER, 5 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
ICS853014BGLFT 853014 SERIES, LOW SKEW CLOCK DRIVER, 5 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
ICS853016AG 853016 SERIES, LOW SKEW CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8
ICS853016AMLFT 853016 SERIES, LOW SKEW CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO8
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