CDC330
CLOCK DRIVER
WITH 3-STATE OUTPUTS

SCAS329A - OCTOBER 1993 - REVISED MARCH 1994

features

• 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 I_OL)
• State-of-the-Art EPIC-IIB^TM BiCMOS Design Significantly Reduces Power Dissipation
• Packaged in Plastic Small-Outline Package

EPIC-IIB is a trademark of Texas Instruments Incorporated.

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 (2) input is low and the preset () input is high, the Q outputs toggle on high-to-low transitions of 2A\. Taking low asynchronously presets the Q outputs to the high level. When a bank's input is high, the outputs are in the high-impedance state.

The CDC330 is characterized for operation from 0°C to 70°C.