MC10H646 ON Semiconductor, MC10H646 Datasheet

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MC10H646

Manufacturer Part Number
MC10H646
Description
MC10H646PENTIUM MICROPROCESSOR PECL/TTL-TTL CLOCK DRIVER
Manufacturer
ON Semiconductor
Datasheet

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PECL/TTL-TTL 1:8 Clock
Distribution Chip
driver. Devices in the Motorola H600 translator series utilize the 28–lead
PLCC for optimal power pinning, signal flow through and electrical
performance. The single supply H646 is similar to the H643, which is a
dual supply 1:8 version of the same function.
transmission lines. Special techniques were used to match the HIGH and
LOW output impedances to about 7ohms. 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
I OS limiting resistor. As a result, the user should take care in preventing an
output short to ground as the part will be permanently damaged.
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.
TTL loads on a daughter board. When used in conjunction with the MC10/100E111, very low skew, very wide clock trees can be
designed. In addition, a TTL level clock input is provided for flexibility. Note that only one of the inputs can be used on a single
chip. For correct operation, the unused input pins should be left open.
to drive up to 16 different point–to–point clock loads. Refer to the Applications section for a more detailed discussion in this area.
MECL 10H and ECLinPS are trademarks of Motorola, Inc. Pentium is a trademark of Intel Corporation.
8/94
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1996
PECL/TTL–TTL Version of Popular ECLinPS
Low Skew
Guaranteed Skew Spec
Tri–State Enable
Differential Internal Design
V BB Output
Single Supply
Extra TTL and ECL Power/Ground Pins
Matched High and Low Output Impedance
Meets Specifications Required to Drive the Pentium
The MC10H/100H646 is a single supply, low skew translating 1:8 clock
The H646 was designed specifically to drive series terminated
The H646 device meets all of the requirements for driving the 60 and 66MHz Pentium Microprocessor. The device has no PLL
The H646 provides differential PECL inputs for picking up LOW skew PECL clocks from the backplane and distributing it to
The Output Enable pin forces the outputs into a high impedance state when a logic 0 is applied.
The output buffers of the H646 can drive two series terminated, 50 transmission lines each. This capability allows the H646
The 10H version is compatible with MECL 10H
1
E111
ECL logic levels. The 100H version is compatible with 100K levels.
Microprocessor
REV 1
MC100H646
MICROPROCESSOR
MC10H646
CLOCK DRIVER
PECL/TTL–TTL
PLASTIC PACKAGE
PENTIUM
CASE 776–02
FN SUFFIX

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MC10H646 Summary of contents

Page 1

... MECL 10H and ECLinPS are trademarks of Motorola, Inc. Pentium is a trademark of Intel Corporation. 8/94 Motorola, Inc. 1996 E111 Microprocessor ECL logic levels. The 100H version is compatible with 100K levels. 1 REV 1 MC10H646 MC100H646 PENTIUM MICROPROCESSOR PECL/TTL–TTL CLOCK DRIVER FN SUFFIX PLASTIC PACKAGE CASE 776–02 ...

Page 2

Q3 26 OGND Pinout: 28–Lead PLCC OVT 1 (Top View OGND LOGIC DIAGRAM EN TCLK ECLK ECLK TRUTH TABLE TCLK ...

Page 3

DC CHARACTERISTICS (IVT = OVT = VCCE = 5.0V 5%) Symbol Characteristic V OH Output HIGH Voltage V OL Output LOW Voltage IOS Output Short Circuit Current 1. The outputs must not be shorted to ground, as this will result ...

Page 4

DC CHARACTERISTICS (IVT = OVT = VCCE = 5.0V 5%) Symbol Characteristic Min I CCL Power Supply Current I CCH I CCZ AC CHARACTERISTICS (IVT = OVT = VCCE = 5.0V 5%) Symbol Characteristic t PLH Propagation Delay ECLK to ...

Page 5

0.010 (0.250) T L– NOTES: 1. DATUMS –L–, –M–, AND –N– DETERMINED WHERE TOP OF LEAD SHOULDER EXITS PLASTIC BODY AT MOLD PARTING LINE. 2. ...

Page 6

... JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 81–3–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 *MC10H646/D* 6 MC10H646/D TIMING SOLUTIONS BR1333 — Rev 6 ...

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