参数资料
型号: ICS889871AKLF
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟及定时
英文描述: 889871 SERIES, LOW SKEW CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC16
封装: 3 X 3 MM, 0.95 MM HEIGHT, ROHS COMPLIANT, MO-220, VFQFN-16
文件页数: 16/17页
文件大小: 2105K
代理商: ICS889871AKLF
IDT / ICS LVPECL BUFFER/DIVIDER W/INTERNAL TERMINATION
8
ICS889871AK REV A JULY 28, 2006
ICS889871
DIFFERENTIAL-TO-3.3V, 2.5V LVPECL BUFFERN/DIVIDER W/INTERNAL TERMINATION
APPLICATION INFORMATION
INPUTS:
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
resister can be used.
OUTPUTS:
LVPECL OUTPUT
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.
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
3.3V LVPECL INPUT WITH BUILT-IN 50
TERMINATIONS INTERFACE
The IN /nIN with built-in 50
terminations accepts LVDS, LVPECL,
LVHSTL, CML, SSTL and other differential signals. Both V
SWING
and V
OH must meet the V
PP
and V
CMR
input requirements.
Figures
2A to 2E show interface examples for the HiPerClockS IN/nIN
input with built-in 50
terminations driven by the most common
driver types. The input interfaces suggested here are examples
only. If the driver is from another vendor, use their termination
recommendation. Please consult with the vendor of the driver
component to confirm the driver termination requirements.
FIGURE 2A. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50
DRIVEN BY AN LVDS DRIVER
FIGURE 2B. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50
DRIVEN BY AN LVPECL DRIVER
FIGURE 2D. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50
DRIVEN BY A CML DRIVER
WITH
BUILT-IN 50
PULLUP
3.3V
Zo = 50 Ohm
3.3V
LVDS
Receiver
With
Built-In
50 Ohm
IN
nIN
VT
Zo = 50 Ohm
R1
50
IN
nIN
VT
3.3V
Zo = 50 Ohm
Receiver
With
Built-In
50 Ohm
3.3V
LVPECL
Zo = 50 Ohm
FIGURE 2E. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50
DRIVEN BY AN SSTL DRIVER
3.3V
Receiver
With
Built-In
50 Ohm
Zo = 50 Ohm
IN
nIN
VT
3.3V
Zo = 50 Ohm
CML- Built-in 50 Ohm Pull-Up
FIGURE 2C. HIPERCLOCKS IN/nIN INPUT WITH
BUILT-IN 50
DRIVEN BY A CML DRIVER
WITH
OPEN COLLECTOR
Zo = 50 Ohm
3.3V
R2
25
Receiver
With
Built-In
50 Ohm
IN
nIN
VT
SSTL
R1
25
3.3V
CML- Open Collector
IN
nIN
VT
Zo = 50 Ohm
Receiver
With
Built-In
50 Ohm
3.3V
Zo = 50 Ohm
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