CGS74CT2526MX Datasheet

General Purpose/


Features, Applications

The CGS is a minimum skew clock driver with one input driving eight outputs specifically designed for signal generation and clock distribution applications The '2525 is designed to distribute a single clock to eight separate receivers with low skew across all outputs during both the tPLH and tPHL transitions The '2526 is similar to the '2525 but contains a multiplexed clock input to allow for systems with dual clock speeds or systems where a separate test clock has been implemented


These CGS devices implement National's FACTTM family Ideal for signal generation and clock distribution Guaranteed pin to pin and part to part skew Multiplexed clock input ('2526) Guaranteed 2 kV minimum ESD protection Symmetric output current drive 24 mA for IOL IOH 'CT has TTL-compatible inputs These products are identical 74AC ACT2525 and 2526 Available as Mil Aero versions 54AC ACT2526

TRI-STATE is a registered trademark of National Semiconductor Corporation FACTTM is a trademark of National Semiconductor Corporation C1996 National Semiconductor Corporation 10684 RRD-B30M106 Printed S A

On the multiplexed clock device the SEL pin is used to determine which CLKn input will have an active effect on the outputs of the circuit When SEL e 1 the CLK1 input is selected and when SEL e 0 the CLK0 input is selected The non-selected CLKn input will not have any effect on the logical output level of the circuit The output pins act as a single entity and will follow the state of the CLK CLK1 CLK0 pins when either the multiplexed ('2526) or the straight ('2525) clock distribution chip is selected Pin Description Pin Names CLK � O7 SEL Description Clock Input ('2525) Clock Inputs ('2526) Outputs Clock Select ('2526)

L e Low Voltage Level H e High Voltage Level X e Immaterial

If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage (VCC) DC Input Diode Current (IIK) VI e VCC 5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO e VCC 5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) Junction Temperature (iJA) Plastic (N) 14-Lead Plastic (M) 14-Lead Plastic (N) 16-Lead Plastic (M) 16-Lead

Supply Voltage (VCC) `C' `CT' Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) CT 54AC ACT Input Rise and Fall Times Devices 70% of VCC) VCC 5 5V Input Rise and Fall Times Devices 0V to VCC 0V to VCC

Note 1 Absolute maximum ratings are those values beyond which damage to the device may occur The databook specifications should be met without exception to ensure that the system design is reliable over its power supply temperature and output input loading variables National does not recommend operation of CGS circuits outside databook specifications



Manufacturer information

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