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CDC330DWR Arkusz danych(PDF) 1 Page - Texas Instruments |
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CDC330DWR Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 7 page CDC330 CLOCK DRIVER WITH 3-STATE OUTPUTS SCAS329A – OCTOBER 1993 – REVISED MARCH 1994 Copyright © 1994, Texas Instruments Incorporated 2–1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Low Output Skew, Low Pulse Skew for Clock-Distribution and Clock-Generation Applications • TTL-Compatible Inputs and Outputs • Two Banks Distribute One Clock Input to Three Same-Frequency Clock Outputs • One Bank Distributes One Clock Input to Four Half-Frequency Clock Outputs • Internal Power-Up Circuit • Distributed V CC and Ground Pins Reduce Switching Noise • Symmetrical Output Drive (–32-mA I OH, 32-mA IOL) • State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation • Packaged in Plastic Small-Outline Package description The CDC330 is a high-performance, low-skew clock driver. It is specifically designed for applications requiring output signals at both the primary clock frequency and one-half the primary clock frequency. This device contains two banks that fan out one input to three same-frequency outputs and one bank that fans out one input to four half-frequency outputs with minimum skew for clock distribution. Each bank of Y outputs switch in phase and at the same frequency as its clock (A) input. The four Q outputs switch at one-half the frequency of their clock (2A) input. When the output-enable (2OE) input is low and the preset (PRE) input is high, the Q outputs toggle on high-to-low transitions of 2A. Taking PRE low asynchronously presets the Q outputs to the high level. When a bank’s OE input is high, the outputs are in the high-impedance state. The CDC330 is characterized for operation from 0 °C to 70°C. FUNCTION TABLES INPUTS OUTPUTS nOE nA OUTPUTS nY1 – nY3 H X Z L LL L H H n = 1, 3 INPUTS OUTPUTS 2OE PRE 2A 2Q1 – 2Q3 H X X Z L LL H L H ↓ Toggle 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 GND 1Y1 1Y2 GND 2Q1 2OE 2A 2Q2 GND 3Y1 3Y2 GND 1OE 1Y3 1A VCC PRE 2Q3 GND 2Q4 VCC 3OE 3Y3 3A DW PACKAGE (TOP VIEW) EPIC- ΙΙB is a trademark of Texas Instruments Incorporated. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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