CGS74C2525

CGS74C2525  CGS74CT2525  CGS74C2526  CGS74CT2526 1-to-8 Minimum Skew Clock Driver September 1995 CGS74C2525  CGS74CT2525 CGS74C2526  CGS74CT2526 1-to-8 Minimum Skew Clock Driver The CGS ’C CT2525 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 Features Y Y Y Y Y Y Y Y Y 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 of 24 mA for IOL IOH ’CT has TTL-compatible inputs These products are identical to 74AC ACT2525 and 2526 Available as Mil Aero versions 54AC ACT2525 54AC ACT2526 Logic Symbols ’2525 Connection Diagrams Pin Assignment for DIP and SOIC ’2525 TL F 10684 – 1 ’2526 TL F 10684 – 3 ’2526 TL F 10684 – 2 TL F 10684 – 4 TRI-STATE is a registered trademark of National Semiconductor Corporation FACTTM is a trademark of National Semiconductor Corporation C1996 National Semiconductor Corporation TL F 10684 RRD-B30M106 Printed in U S A http www national com Functional Description 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 or CLK1 CLK0 pins when either the multiplexed (’2526) or the straight (’2525) clock distribution chip is selected Pin Description Pin Names CLK CLK0 CLK1 O0 – O7 SEL Description Clock Input (’2525) Clock Inputs (’2526) Outputs Clock Select (’2526) Truth Tables ’2525 Inputs CLK L H Outputs O0 –O7 L H ’2526 Inputs CLK0 L H X X CLK1 X X L H SEL L L H H Outputs O0 –O7 L H L H L e Low Voltage Level H e High Voltage Level X e Immaterial ’2525 ’2526 TL F 10684–7 TL F 10684 – 8 http www national com 2 Absolute Maximum Ratings (Note 1) 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 b0 5V VI e VCC a 0 5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO e 0 5V VO e VCC a 0 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 b 0 5V to a 7 0V b 20 mA a 0 2 mA b 0 5V to (VCC a 0 5V) b 20 mA a 20 mA b 0 5V to (VCC a 0 5V) g 50 mA g 50 MA Recommended Operating Conditions Supply Voltage (VCC) ‘C’ ‘CT’ Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) CGS74C CT 54AC ACT Input Rise and Fall Times Devices (30% to 70% of VCC) VCC e 3 3V 4 5V 5 5V Input Rise and Fall Times Devices (0 8V to 2 0V) 2 0V to 6 0V 4 5V to 5 5V 0V to VCC 0V to VCC b 40 C to a 85 C b 55 C to a 125 C 10 5 ns max 14 4 ns max 17 6 ns max 9 6 ns max b 65 C to a 150 C 102 128 97 124 C C C C W W W W 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 DC Electrical Characteristics for CGS74C and 54AC Family Devices Over recommended operating conditions unless specified otherwise CGS74C Symbol Parameter VCC (V) TA e a 25 C Typ VIH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage (Note 2) 30 45 55 30 45 55 30 45 55 30 45 55 VOL Maximum Low Level Output Voltage (Note 2) 30 45 55 30 45 55 0 002 0 001 0 001 15 2 25 2 75 15 2 25 2 75 2 99 4 49 5 49 21 3 15 3 85 09 1 35 1 65 29 44 54 2 56 3 86 4 86 01 01 01 0 36 0 36 0 36 54AC TA e b 55 C to a 125 C CGS74C TA e b 40 C to a 85 C Units Conditions Guaranteed Limits 21 3 15 3 85 09 1 35 1 65 29 44 54 24 37 47 01 01 01 0 40 0 50 0 50 21 3 15 3 85 09 1 35 1 65 29 44 54 2 46 3 76 4 76 01 01 01 0 44 0 44 0 44 V VOUT e 0 1V or VCC b0 1V VOUT e 0 1V or VCC b0 1V IOUT e b50 mA V VIN e VIL or VIH b 12 mA b 24 mA IOH b 24 mA IOUT e 50 mA V VIN e VIL or VIH 12 mA 24 mA IOL 24 mA VIL V VOH V V 3 http www national com DC Electrical Characteristics for CGS74C and 54AC Family Devices (Continued) Over recommended operating conditions unless specified otherwise CGS74C Symbol Parameter VCC (V) TA e a 25 C Typ IIN Maximum Input Leakage Current (Note 3) Minimum Dynamic Output Current (Note 4) Maximum Quiescent Supply Current (Note 3) 55 55 55 g0 1 54AC TA e b 55 C to a 125 C CGS74C TA e b 40 C to a 85 C Units Conditions Guaranteed Limits g1 0 g1 0 mA mA mA mA VI e VCC GND VOLD e 1 65V Max VOHD e 3 85V Min VIN e VCC or GND IOLD IOHD ICC 50 b 50 75 b 75 55 80 80 0 80 0 DC Electrical Characteristics for CGS74CT and 54ACT Family Devices Over recommended operating conditions unless specified otherwise CGS74CT Symbol Parameter VCC (V) TA e a 25 C Typ VIH VIL VOH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage (Note 2) 45 55 45 55 45 55 45 55 VOL Maximum Low Level Output Voltage (Note 2) 45 55 45 55 IIN ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum ICC Input Minimum Dynamic Output Current (Note 4) Maximum Quiescent Supply Current (Note 5) 55 55 55 55 06 0 001 0 001 15 15 15 15 4 49 5 49 20 20 08 08 44 54 3 86 4 86 01 01 0 36 0 36 g0 1 54ACT TA e b 55 C to a 125 C CGS74CT TA e b 40 C to a 85 C Units Conditions Guaranteed Limits 20 20 08 08 44 54 3 70 4 70 01 01 0 50 0 50 g1 0 20 20 08 08 44 54 3 76 4 76 01 01 0 44 0 44 g1 0 V V V VOUT e 0 1V or VCC b0 1V VOUT e 0 1V or VCC b0 1V IOUT e b50 mA VIN e VIL or VIH b 24 mA IOH b 24 mA IOUT e 50 mA VIN e VIL or VIH 24 mA IOL 24 mA VI e VCC GND VI e VCC b 2 1V VOLD e 1 65V Max VOHD e 3 85V Min VIN e VCC or GND V V V mA mA mA mA 16 50 b 50 15 75 b 75 55 80 160 0 80 0 mA http www national com 4 AC Electrical Characteristics Over recommended operating conditions unless specified otherwise CGS74C 54AC TA e b55 C to a 125 C CL e 50 pF Min 30 25 Max 11 0 82 CGS74C TA e b40 C to a 85 C CL e 50 pF Min 30 29 30 33 30 35 15 10 15 10 15 Typ Max 12 5 81 14 0 86 15 0 95 600 ps 500 600 ps 500 ns ns ns Units Symbol Parameter VCC Range (V) (Note 6) 33 50 33 50 33 50 33 50 33 50 TA e a 25 C CL e 50 pF Min Typ 65 50 70 55 80 65 03 02 03 02 Max 11 0 78 13 0 78 14 0 85 tPLH tPHL tPLH tPHL tPLH tPHL tOSHL Propagation Delay CLK to On (’2525) Propagation Delay CLKn to On (’2526) Propagation Delay SEL to On (’2526) Maximum Skew Common Edge Output-to-Output (Note 7) Variation Maximum Skew Common Edge Output-to-Output (Note 7) Variation Maximum Skew Opposite Edge Output-to-Output (Note 7) Variation Maximum Skew Part-to-Part Variation (Note 8) ’C2525 ’CT2525 ’C2526 ’CT2526 30 32 30 36 30 40 tOSLH tOST 50 04 10 10 10 ns tPV 50 50 50 35 50 30 40 ns ns trise tfall trise tfall Maximum Rise Fall Time (20% to 80% VCC) Maximum Rise Fall Time (0 8V 2 0V and 2 0V 0 8V) 40 3 75 ns 09 11 ns AC Electrical Characteristics Over recommended operating conditions unless specified otherwise CGS74CT Symbol Parameter VCC Range (V) (Note 6) Min tPLH tPHL tPLH tPHL Propagation Delay CLK to On (’2525) Propagation Delay CLKn to On (’2526) 50 50 46 58 TA e a 25 C CL e 50 pF Typ 65 85 Max 90 11 1 54ACT TA e b55 C to a 125 C CL e 50 pF Min Max CGS74CT TA e b40 C to a 85 C CL e 50 pF Min 40 51 Max 10 1 12 4 ns ns Units 5 http www national com AC Electrical Characteristics Over recommended operating conditions unless specified otherwise (Continued) CGS74CT Symbol Parameter VCC Range (V) (Note 6) Min tPLH tPHL tOSHL Propagation Delay SEL to On (’2526) Maximum Skew Common Edge Output-to-Output (Note 7) Variation Maximum Skew Common Edge Output-to-Output (Note 7) Variation Maximum Skew Opposite Edge Output-to-Output (Note 7) Variation Maximum Skew Part-to-Part Variation (Note 8) AC2525 ACT2525 AC2526 ACT2526 trise tfall trise tfall Maximum Rise Fall Time (20% to 80% VCC) Maximum Rise Fall Time (0 8V 2 0V and 2 0V 0 8V) 50 51 TA e a 25 C CL e 50 pF Typ 85 Max 12 4 54ACT TA e b55 C to a 125 C CL e 50 pF Min Max CGS74CT TA e b40 C to a 85 C CL e 50 pF Min 44 Typ Max 14 1 ns Units 50 02 550 ps tOSLH 50 02 550 ps tOST 50 04 10 ns tPV 50 50 50 35 50 30 3 75 ns ns ns 09 11 ns Note 2 All outputs loaded thresholds on input associated with output under test Note 3 IIN and ICC ICC for 54AC Note 5 ICC for 54ACT 3 0V are guaranteed to be less than or equal to the respective limit 25 C is identical to CGS74C 25 C is identical to CGS74CT 25 C 25 C 5 5V VCC Note 4 Maximum test duration 2 0 ms one output loaded at a time Note 6 Voltage Range 5 0 is 5 0V g 0 5V voltage range 3 3 is 3 3V g 0 3V Note 7 Output-to-Output Skew is defined as the absolute value of the difference between the actual propagation delay for any outputs within the same packaged device The specifications apply to any outputs switching in the same direction either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH) or in opposite directions both HL and LH (tOST) tOSHL and tOSLH are characterized and guaranteed by design 1 MHz Note 8 Part-to-part skew is defined as the absolute value of the difference between the propagation delay for any outputs from device to device The parameter is specified for a given set of conditions (i e capacitive load VCC temperature of outputs switching etc ) Parameter guaranteed by design Note 9 Load capacitance includes the test jig http www national com 6 Capacitance Symbol CIN CPD CPD Parameter Input Capacitance Power Dissipation Capacitance (’2525) Power Dissipation Capacitance (’2526) Typ 45 820 pF – 1 2 x 10b18 (f) 820 pF – 1 2 x 10b18 (f) Units pF pF pF Conditions VCC e 5 0V VCC e 5 0V VCC e 5 0V f e frequency Recommended Maximum Power Dissipation (W) LFPM PDIP 0 225 500 1 105 1 493 1 71 TA e 25 C SOIC 0 858 1 055 1 210 PDIP 0 528 0 714 0 820 TA e 85 C SOIC 0 41 0 504 0 578 Timing Diagrams TL F 10684 – 27 TL F 10684 – 28 Test Circuit RL is 500X CL is 50 pF for all prop delays and skew measurements TL F 10684 – 29 7 http www national com Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows TL F 10684 – 26 Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (M) NS Package Number M14A http www national com 8 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Integrated Circuit (M) NS Package Number M16A 14-Lead Plastic Dual-In-Line Package (N) NS Package Number N14A 9 http www national com CGS74C2525  CGS74CT2525  CGS74C2526  CGS74CT2526 1-to-8 Minimum Skew Clock Driver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (N) NS Package Number N16E 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 http www national com National Semiconductor Europe Fax a49 (0) 180-530 85 86 Email europe support nsc com Deutsch Tel a49 (0) 180-530 85 85 English Tel a49 (0) 180-532 78 32 Fran ais Tel a49 (0) 180-532 93 58 Italiano Tel a49 (0) 180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2308 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications