参数资料
型号: ICS853054AGLFT
元件分类: 编、解码器及复用、解复用
英文描述: 853054 SERIES, 4 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16
封装: 4.40 X 5 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-16
文件页数: 13/15页
文件大小: 377K
代理商: ICS853054AGLFT
Integrated
Circuit
Systems, Inc.
853054AG
www.icst.com/products/hiperclocks.html
REV. A MARCH 29, 2006
7
ICS853054
4:1, DIFFERENTIAL-TO-3.3V OR 2.5V
LVPECL/ECL CLOCK MULTIPLEXER
APPLICATION INFORMATION
WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS
Figure 1 shows how the differential input can be wired to accept
single ended levels. The reference voltage V_REF = V
CC/2 is
generated by the bias resistors R1, R2 and C1. This bias circuit
should be located as close as possible to the input pin. The ratio
FIGURE 1. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT
of R1 and R2 might need to be adjusted to position the V_REF in
the center of the input voltage swing. For example, if the input
clock swing is only 2.5V and V
CC= 3.3V, V_REF should be 1.25V
and R2/R1 = 0.609.
VCC
R2
1K
V_REF
C1
0.1u
R1
1K
Single Ended Clock Input
PCLK
nPCLK
INPUTS:
PCLK/nPCLK INPUT:
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
Ω resister can be tied
from PCLK to ground.
RECOMMENDATIONS FOR UNUSED INPUT PINS
SELECT PINS:
All select pins have internal pull-ups and pull-downs;
additional resistance is not required but can be added for
additional protection. A 1k
Ω resister can be used.
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