onsemi MC10H646
The MC10H/100H646 is a single supply, low skew translating 1:8 clock driver. The single supply H646 is similar to the H643, which is a dual supply 1:8 version of the same function. The H646 was designed specifically to drive series terminated transmission lines.- Min Voltage : 4.75V
- Max Voltage : 5.25V
- Max Operating Temp : 85°C
- Min Operating Temp : 0°C
Source:
Octopart
| Part No. | MC10H646 |
|---|---|
| Datasheet | MC10H646 Download |
| Manufacturer |  onsemi |
| Description | PENTIUM MICROPROCESSOR PECL/TTL-TTL CLOCK DRIVER |
| Buy | Stock & Price |
DESCRIPTION
Devices in the ON Semiconductor H646 translator series utilize the 28−lead PLCC for optimal power pinning, signal flow through and electrical performance. Special techniques were used to match the HIGH and LOW output impedances to about 7.0 W. This simplifies the choice of the termination resistor for series terminated applications. To match the HIGH and LOW output impedances, it was necessary to remove the standard IOS limiting resistor. As a result, the user should take care in preventing an output short to ground as the part will be permanently damaged. The H646 device meets all of the requirements for driving the 60 MHz and 66 MHz Intel Pentium® Microprocessor. The device has no PLL components, which greatly simplifies its implementation into a digital design. The eight copies of the clock allows for point−to−point clock distribution to simplify board layout and optimize signal integrity. The H646 provides differential PECL inputs for picking up LOW skew PECL clocks from the backplane and distributing it to TTL loads on a daughter board.
