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MC10H640 데이터시트(PDF) 1 Page - ON Semiconductor |
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MC10H640 데이터시트(HTML) 1 Page - ON Semiconductor |
1 / 8 page © Semiconductor Components Industries, LLC, 2006 August, 2016 − Rev. 9 1 Publication Order Number: MC10H640/D MC10H640 68030/040 PECL to TTL Clock Driver Description The MC10H640 generates the necessary clocks for the 68030, 68040 and similar microprocessors. It is guaranteed to meet the clock specifications required by the 68030 and 68040 in terms of part-to-part skew, within-part skew and also duty cycle skew. The user has a choice of using either TTL or PECL (ECL referenced to +5.0 V) for the input clock. TTL clocks are typically used in present MPU systems. However, as clock speeds increase to 50 MHz and beyond, the inherent superiority of ECL (particularly differential ECL) as a means of clock signal distribution becomes increasingly evident. The H640 also uses differential PECL internally to achieve its superior skew characteristic. The H640 includes divide-by-two and divide-by-four stages, both to achieve the necessary duty cycle skew and to generate MPU clocks as required. A typical 50 MHz processor application would use an input clock running at 100 MHz, thus obtaining output clocks at 50 MHz and 25 MHz (see Logic Diagram). Features • Generates Clocks for 68030/040 • Meets 030/040 Skew Requirements • TTL or PECL Input Clock • Extra TTL and PECL Power/Ground Pins • Asynchronous Reset • Single +5.0 V Supply • This Device is Pb-Free, Halogen Free and is RoHS Compliant Function Reset (R): LOW on RESET forces all Q outputs LOW and all Q outputs HIGH. Power-Up: The device is designed to have the POS edges of the ÷ 2 and ÷ 4 outputs synchronized at power up. Select (SEL): LOW selects the ECL input source (DE/DE ). HIGH selects the TTL input source (DT). The H640 also contains circuitry to force a stable state of the ECL input differential pair, should both sides be left open. In this case, the DE side of the input is pulled LOW, and DE goes HIGH. MARKING DIAGRAM* A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb-Free Package PLLC−28 FN SUFFIX CASE 776−02 MC10H640G AWLYYWW 1 www.onsemi.com *For additional marking information, refer to Application Note AND8002/D. ORDERING INFORMATION Device Package Shipping MC10H640FNG PLLC−28 (Pb-Free) 37 Units / Tube |
유사한 부품 번호 - MC10H640_16 |
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유사한 설명 - MC10H640_16 |
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