1:10 PECL clock distribution device
• 80 ps part-to-part skew
• 20 ps output-to-output skew
• Differential design
• PECL inputs and outputs
• VBB reference output voltage available
• 75 kΩ input pulldown resistors
• Low voltage VCC range of 2.375 V to +3.8 V
• High signaling rate capability (above 1 GHz)
• Pin and function compatible to MC100EP111, MC100LVEP111
• Available in LQFP32 package
The PTN1111 is a low-skew, 1:10 PECL clock distribution device.
One selected clock signal out of two selectable inputs is fanned out
to 10 identical, precision time-aligned differential outputs.
The PTN1111 is provided with a VBB reference voltage to allow for
single-ended PECL input and with complementary clock inputs to
allow for differential PECL input.
The main purpose and benefit of the PTN1111 is low skew: between
individual outputs of a single PTN1111 (within-part skew or
output-to-output skew) as well as measured from part-to-part.
Within-part skew is realized by careful attention to internal layout
and design of the PTN1111, whereas part-to-part skew is achieved
by control and monitoring of relevant process parameters.
The PTN1111 can be used for high-performance, high-speed clock
distribution in systems which utilize PECL as the primary signaling
standard. Designers can take advantage of the device’s performance
to distribute clocks across a board or backplane, at an extremely high
degree of time alignment, thereby affording system processors to
achieve maximum utilization of the clock cycle.
PIN NUMBER SYMBOL
NAME AND FUNCTION
1 VCC Power supply voltage
2 CLK_SEL Clock select input
3, 4 CLK0, CLK0 Differential PECL clock input pair
5 VBB Voltage reference output
6, 7 CLK1, CLK1 Differential PECL clock input pair
9, 16, 25, 32
Output driver power supply
10–15, 17–24, Q0:9, Q0:9 Differential PECL output pairs
Plastic low profile quad flat package; 32 leads; body 7 x 7 x 1.4 mm
2001 Jun 19
2 853-2262 26560