CGS64/74B2528 450 ps 1 to 10 Minimum Skew Clock Driver General Description Features These minimum skew clock drivers are designed for Clock Generation & Support (CGS) applications operating above 50 MHz. This device guarantees minimum output skew across the outputs of a given device. Skew parameters are also provided as a means to measure duty cycle requirements as those found in high speed clocking systems. The ’2528 is a minimum skew clock driver with one input driving ten outputs, specifically designed for signal generation and clock distribution applications. Y Y Y Y Y Y Y Y Y Y Logic Symbol Clock Generation & Support (CGS) devices ideal for high frequency signal generation or clock distribution applications CGS64/74B version features National’s Advanced Bipolar FASTÉ LSI process 1-to-10 low skew clock distribution 450 ps pin-to-pin output skew for the PLCC package Specification for transition skew to meet duty cycle requirements 28-pin centered VCC and GND configuration for PLCC to minimize high speed switching noise Current sourcing 48 mA and current sinking of 64 mA Low dynamic power consumption above 20 MHz Guaranteed 4K volts ESD protection Commercial and Industrial temperature availability Connection Diagrams Pin Assignment for DIP and SOIC TL/F/10984 – 1 TL/F/10984 – 3 Pin Assignment for PLCC TL/F/10984 – 5 FASTÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/10984 RRD-B30M115/Printed in U. S. A. CGS64/74B2528 450 ps 1 to 10 Minimum Skew Clock Driver September 1995 Pin Description Truth Tables Pin Names Description Inputs Outputs CLK O0 – O9 Clock Input Outputs CLK O0 –O9 L H L H L e Low Logic Level H e High Logic Level TL/F/10984–7 2 Absolute Maximum Ratings (Note) Recommended Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage (VCC) 7.0V 7.0V b 40§ C to a 85§ C 64 Grade 74 Grade 0§ C to a 70§ C b 65§ C to a 150§ C Storage Temperature Range Typical iJA 0 LFM 225 LFM 500 LFM M 89 71 63 N 71 57 48 V 64 52 45 4.5V to 5.5V Input Rise and Fall Times (0.8V to 2.0V) Free Air Operating Temperature 64 (TA) Supply Voltage (VCC) Input Voltage (VI) Operating Temperature 9.6 ns max b 40§ C to a 85§ C b 0§ C to a 70§ C Free Air Operating Temperature 74 (TA) NOTE: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the DC and AC Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The Recommended Operating Conditions will define the conditions for actual device operation. § C/W § C/W § C/W DC Electrical Characteristics Over recommended operating conditions unless specified otherwise. All typical values are measured at VCC e 5V, TA e 25§ C. Symbol Parameter VIK Input Clamp Voltage VIH Minimum Input High Level Voltage VIL Maximum Input Low Level Voltage VOH High Level Output Voltage Conditions IOH e b3 mA, VCC e 4.5V 2.4 IOH e 48 mA, VCC e 4.5V 2.0 VCC e 4.5V, IOL e 64 mA II Input Current Input Voltage VCC e 5.5V, VIH e 7V IIH High Level Input Current VCC e 5.5V, VIH e 2.7V IIL Low Level Input Current VCC e 5.5V, VIL e 0.4V IO Output Drive Current VCC e 5.5V, VO e 2.25V ICC Supply Current VCC e 5.5V CIN Input Capacitance Max Units b 1.2 V V 0.8 Low Level Output Voltage Max Typ 2.0 VOL @ Min VCC e 4.5V, II e b18 mA VCC e 5V V 0.35 b 0.5 b 50 0.5 V 0.1 mA 20 mA b 0.75 mA b 150 mA Outputs High 24 35 mA Outputs Low 45 65 mA 5 3 V pF AC Electrical Characteristics Over recommended operating conditions unless specified otherwise. All typical values are measured at VCC e 5V, TA e 25§ C. Symbol VCC e 4.5V to 5.5V CL e 50 pF RL e 500X Parameter Min Typ Units Max fMAX Frequency Maximum tPLH Low-to-High Propagation Delay CLK to On M, N Pkg. 3.0 4.5 7.0 Low-to-High Propagation Delay CLK to On V Pkg. 2.5 4.5 6.5 High-to-Low Propagation Delay CLK to On M, N Pkg. 3.0 4.5 7.0 High-to-Low Propagation Delay CLK to On V Pkg. 2.5 4.5 6.5 tPHL 80 MHz ns ns Extended AC Electrical Characteristics Over recommended operating conditions unless specified otherwise. All typical values are measured at VCC e 5V, TA e 25§ C. Symbol VCC e 4.5V to 5.5V CL e 50 pF RL e 500X Parameter Package tOSHL tOSLH tPS trise, tfall Min Typ Units Max Maximum Skew Common Edge Output-to-Output Variation (Note 1) N M V (Note 2) 700 450 450 550 ps Maximum Skew Common Edge Output-to-Output Variation (Note 1) N M V (Note 2) 700 450 450 550 ps Maximum Skew Pin (Signal) Transition Variation N M V 750 750 850 ps Rise/Fall Time (from 0.8V/2.0V to 2.0V/0.8V) Note 1: tOSHL and tOSLH characterized and guaranteed by design @ CGS74 1.5 CGS64 1.75 1 MHz. Note 2: Measured at 66 MHz. Parameter guaranteed by design. 4 ns Timing Diagrams TL/F/10984 – 15 TL/F/10984 – 16 Test Circuit RL is 500X CL is 50 pF for all prop delays and skew measurements TL/F/10984 – 17 Note 3: Refer to Test Philosophy and Definitions section for skew specifications. Note 4: Load capacitance includes the test jig. 5 Ordering Information (contact NSC Marketing for specific date of availability) CGS 74 B 252X WM Family Clock Generation & Support Packaging WM e JEDEC SOIC V e PLCC N e Plastic DIP DWF e Die Wafer Form Operating Temperature Range 74 e Commercial 64 e Industrial Device Type 2528 Technology B e Bipolar Physical Dimensions inches (millimeters) 20-Lead Molded Package (Small Outline 0.300 Wide) (WM) NS Package Number M20B 6 Physical Dimensions inches (millimeters) (Continued) 20-Lead Molded Dual-On-Line Package (N) NS Package Number N20A 7 CGS64/74B2528 450 ps 1 to 10 Minimum Skew Clock Driver Physical Dimensions inches (millimeters) (Continued) 28-Lead Plastic Chip Carrier (PLCC) NS Package Number V28A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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