CGS74C2525 CGS74CT2525 CGS74C2526 CGS74CT2526 1-to-8 Minimum Skew Cloc
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CGS74C2525 CGS74CT2525 CGS74C2526 CGS74CT2526 1-to-8 Minimum Skew Clock Driver
CGS74C2525 CGS74CT2525 CGS74C2526 CGS74CT2526 1-to-8 Minimum Skew Clock Driver
CT2525 minimum skew clock driver with input driving eight outputs specifically designed signal generation clock distribution applications '2525 designed distribute single clock eight separate receivers with skew across outputs during both tPLH tPHL transitions '2526 similar '2525 contains multiplexed clock input allow systems with dual clock speeds systems where separate test clock been implemented
Features
These devices implement National's FACTfamily Ideal signal generation clock distribution Guaranteed part part skew Multiplexed clock input ('2526) Guaranteed minimum protection Symmetric output current drive TTL-compatible inputs These products identical 74AC ACT2525 2526 Available Aero versions 54AC ACT2525 54AC ACT2526
Logic Symbols
'2525
Connection Diagrams
Assignment SOIC '2525
10684
'2526
10684
'2526
10684
10684
TRI-STATE registered trademark National Semiconductor Corporation FACTis trademark National Semiconductor Corporation C1996 National Semiconductor Corporation 10684 RRD-B30M106 Printed
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Functional Description
multiplexed clock device used determine which CLKn input will have active effect outputs circuit When CLK1 input selected when CLK0 input selected non-selected CLKn input will have effect logical output level circuit output pins single entity will follow state CLK1 CLK0 pins when either multiplexed ('2526) straight ('2525) clock distribution chip selected Description Names CLK0 CLK1 Description Clock Input ('2525) Clock Inputs ('2526) Outputs Clock Select ('2526)
Truth Tables
'2525 Inputs Outputs '2526 Inputs CLK0 CLK1 Outputs
Voltage Level High Voltage Level Immaterial
'2525
'2526
10684-7
10684
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Absolute Maximum Ratings (Note
Military Aerospace specified devices required please contact National Semiconductor Sales Office Distributors availability specifications Supply Voltage (VCC) Input Diode Current (IIK) Input Voltage (VI) Output Diode Current (IOK) Output Voltage (VO) Output Source Sink Current (IO) Ground Current Output (ICC IGND) Storage Temperature (TSTG) Junction Temperature (iJA) Plastic 14-Lead Plastic 14-Lead Plastic 16-Lead Plastic 16-Lead
(VCC (VCC
Recommended Operating Conditions
Supply Voltage (VCC) `CT' Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) CGS74C 54AC Input Rise Fall Times Devices (30% VCC) Input Rise Fall Times Devices
Note Absolute maximum ratings those values beyond which damage device occur databook specifications should without exception ensure that system design reliable over power supply temperature output input loading variables National does recommend operation circuits outside databook specifications
Electrical Characteristics CGS74C 54AC Family Devices
Over recommended operating conditions unless specified otherwise CGS74C Symbol Parameter Minimum High Level Input Voltage Maximum Level Input Voltage Minimum High Level Output Voltage (Note Maximum Level Output Voltage (Note 54AC CGS74C Units Conditions
Guaranteed Limits VOUT VOUT IOUT IOUT
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Electrical Characteristics CGS74C 54AC Family Devices (Continued)
Over recommended operating conditions unless specified otherwise CGS74C Symbol Parameter Maximum Input Leakage Current (Note Minimum Dynamic Output Current (Note Maximum Quiescent Supply Current (Note
54AC
CGS74C Units Conditions
Guaranteed Limits
VOLD VOHD
IOLD IOHD
Electrical Characteristics CGS74CT 54ACT Family Devices
Over recommended operating conditions unless specified otherwise CGS74CT Symbol Parameter Minimum High Level Input Voltage Maximum Level Input Voltage Minimum High Level Output Voltage (Note Maximum Level Output Voltage (Note ICCT IOLD IOHD Maximum Input Leakage Current Maximum Input Minimum Dynamic Output Current (Note Maximum Quiescent Supply Current (Note
54ACT
CGS74CT Units Conditions
Guaranteed Limits
VOUT VOUT IOUT IOUT VOLD VOHD
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Electrical Characteristics
Over recommended operating conditions unless specified otherwise CGS74C 54AC CGS74C Units
Symbol
Parameter
Range (Note
tPLH tPHL tPLH tPHL tPLH tPHL tOSHL
Propagation Delay ('2525) Propagation Delay CLKn ('2526) Propagation Delay ('2526) Maximum Skew Common Edge Output-to-Output (Note Variation Maximum Skew Common Edge Output-to-Output (Note Variation Maximum Skew Opposite Edge Output-to-Output (Note Variation Maximum Skew Part-to-Part Variation (Note 'C2525 'CT2525 'C2526 'CT2526
tOSLH
tOST
trise tfall trise tfall
Maximum Rise Fall Time (20% VCC) Maximum Rise Fall Time
Electrical Characteristics Over recommended operating conditions unless specified otherwise
CGS74CT Symbol Parameter Range (Note tPLH tPHL tPLH tPHL Propagation Delay ('2525) Propagation Delay CLKn ('2526) 54ACT CGS74CT Units
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Electrical Characteristics
Over recommended operating conditions unless specified otherwise (Continued) CGS74CT Symbol Parameter Range (Note tPLH tPHL tOSHL Propagation Delay ('2526) Maximum Skew Common Edge Output-to-Output (Note Variation Maximum Skew Common Edge Output-to-Output (Note Variation Maximum Skew Opposite Edge Output-to-Output (Note Variation Maximum Skew Part-to-Part Variation (Note AC2525 ACT2525 AC2526 ACT2526 trise tfall trise tfall Maximum Rise Fall Time (20% VCC) Maximum Rise Fall Time 54ACT CGS74CT Units
tOSLH
tOST
Note outputs loaded thresholds input associated with output under test Note 54AC Note 54ACT guaranteed less than equal respective limit identical CGS74C identical CGS74CT
Note Maximum test duration output loaded time Note Voltage Range voltage range Note Output-to-Output Skew defined absolute value difference between actual propagation delay outputs within same packaged device specifications apply outputs switching same direction either HIGH (tOSHL) HIGH (tOSLH) opposite directions both (tOST) tOSHL tOSLH characterized guaranteed design Note Part-to-part skew defined absolute value difference between propagation delay outputs from device device parameter specified given conditions capacitive load temperature outputs switching Parameter guaranteed design Note Load capacitance includes test
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Capacitance
Symbol Parameter Input Capacitance Power Dissipation Capacitance ('2525) Power Dissipation Capacitance ('2526) 10b18 10b18 Units Conditions
frequency
Recommended Maximum Power Dissipation LFPM PDIP SOIC PDIP SOIC
Timing Diagrams
10684
10684
Test Circuit
500X prop delays skew measurements
10684
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Ordering Information
device number used form part simplified purchasing code where package type temperature range defined follows
10684
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit Package Number M14A
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Small Outline Integrated Circuit Package Number M16A
14-Lead Plastic Dual-In-Line Package Package Number N14A
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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 Package Number N16E
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT NATIONAL SEMICONDUCTOR CORPORATION used herein Life support devices systems devices systems which intended surgical implant into body support sustain life whose failure perform when properly used accordance with instructions provided labeling reasonably expected result significant injury user
National Semiconductor Corporation 1111 West Bardin Road Arlington 76017 1(800) 272-9959 1(800) 737-7018
critical component component life support device system whose failure perform reasonably expected cause failure life support device system affect safety effectiveness
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National does assume responsibility circuitry described circuit patent licenses implied National reserves right time without notice change said circuitry specifications
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