CGS74C2525 NSC | Alldatasheet
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Y These CGS devices implement National’s FACT TM family Y Ideal for signal generation and clock distribution Y Guaranteed pin to pin and part to part skew Y Multiplexed clock input (’2526) Y Guaranteed 2 kV minimum ESD protection Y Symmetric output current drive of 24 mA for I OL/IOH Y ’CT has TTL-compatible inputs Y These products are identical to 74AC/ACT2525 and 2526 Y Available as Mil/Aero versions 54AC/ACT2525 54AC/ACT2526 Logic Symbols ’2525 TL/F/10684–1 ’2526 TL/F/10684–2 Connection Diagrams Pin Assignment for DIP and SOIC ’2525 TL/F/10684–3 ’2526 TL/F/10684–4 TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. FACTTM is a trademark of National Semiconductor Corporation.
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 Description CLK Clock Input (’2525) CLK0, CLK1 Clock Inputs (’2526) O 0 –O7 Outputs SEL Clock Select (’2526) Truth Tables ’2525 Inputs Outputs CLK O 0 –O7 LL HH ’2526 Inputs Outputs CLK0 CLK1 SEL O 0 –O7 LX L L HX L H XL H L XH H H L e Low Voltage Level H e High Voltage Level X e Immaterial ’2525 TL/F/10684–7 ’2526 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 (V CC) b0.5V to a7.0V DC Input Diode Current (I IK) VI eb 0.5V b20 mA VI e VCC a0.5V a0.2 mA DC Input Voltage (V I) b0.5V to (V CC a0.5V) DC Output Diode Current (I OK) VO e 0.5V b20 mA VO e VCC a0.5V a20 mA DC Output Voltage (V O) b0.5V to (V CC a0.5V) DC Output Source or Sink Current (I O) g50 mA DC V CC or Ground Current per Output Pin (I CC or I GND) g50 MA Storage Temperature (T STG) b65§Ct o a150§C Junction Temperature ( iJA) Plastic (N) 14-Lead 102 §C/W Plastic (M) 14-Lead 128 §C/W Plastic (N) 16-Lead 97 §C/W Plastic (M) 16-Lead 124 §C/W Recommended Operating Conditions Supply Voltage (V CC) ‘C’ 2.0V to 6.0V ‘CT’ 4.5V to 5.5V Input Voltage (V I) 0 Vt oV CC Output Voltage (V O) 0 Vt oV CC Operating Temperature (T A) CGS74C/CT b40§Ct o a85§C 54AC/ACT b55§Ct o a125§C Input Rise and Fall Times Devices (30% to 70% of V CC) VCC e 3.3V 10.5 ns max 4.5V 14.4 ns max 5.5V 17.6 ns max Input Rise and Fall Times Devices (0.8V to 2.0V) 9.6 ns max 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 recom- mend operation of CGS circuits outside databook specifications. Over recommended operating conditions unless specified otherwise. CGS74C 54AC CGS74C Symbol Parameter VCC TA ea 25§C TA e TA e Units Conditions(V) b55§Ct o a125§C b40§Ct o a85§C Typ Guaranteed Limits VIN e VIL or V IH 3.0 2.56 2.4 2.46 b12 mA 4.5 3.86 3.7 3.76 V I OH b24 mA 5.5 4.86 4.7 4.76 b24 mA VIN e VIL or V IH 3.0 0.36 0.40 0.44 12 mA 4.5 0.36 0.50 0.44 V I OL 24 mA 5.5 0.36 0.50 0.44 24 mA http:/ /www.national.com3
Over recommended operating conditions unless specified otherwise. CGS74C 54AC CGS74C Symbol Parameter VCC TA ea 25§C TA e TA e Units Conditions(V) b55§Ct o a125§C b40§Ct o a85§C Typ Guaranteed Limits IIN Maximum Input 5.5 g0.1 g1.0 g1.0 mALeakage Current VI e VCC, GND (Note 3) IOLD Minimum Dynamic 5.5 50 75 mA V OLD e 1.65V Max IOHD Output Current 5.5 b50 b75 mA V OHD e 3.85V Min(Note 4) ICC Maximum Quiescent 5.5 8.0 80.0 80.0 mA VIN e VCCSupply Current or GND(Note 3) Over recommended operating conditions unless specified otherwise. CGS74CT 54ACT CGS74CT Symbol Parameter VCC TA ea 25§C TA e TA e Units Conditions(V) b55§Ct o a125§C b40§Ct o a85§C Typ Guaranteed Limits (Note 2) VIN e VIL or V IH 4.5 3.86 3.70 3.76 V IOH b24 mA 5.5 4.86 4.70 4.76 b24 mA (Note 2) VIN e VIL or V IH 4.5 0.36 0.50 0.44 V IOL 24 mA 5.5 0.36 0.50 0.44 24 mA IIN Maximum Input 5.5 g0.1 g1.0 g1.0 mAV I e VCC, GNDLeakage Current IOLD Minimum Dynamic 5.5 50 75 mA V OLD e 1.65V Max IOHD Output Current 5.5 b50 b75 mA V OHD e 3.85V Min(Note 4) ICC Maximum Quiescent 5.5 8.0 160.0 80.0 mA VIN e VCCSupply Current or GND(Note 5) http:/ /www.national.com 4
(Note 6) Range VCC (V) CGS74C 54AC CGS74C TA ea 25§C TA eb 55§CT A eb 40§C Symbol Parameter CL e 50 pF to a125§Ct o a85§C Units CL e 50 pF C L e 50 pF Min Typ Max Min Max Min Typ Max tPV Maximum Skew ’C2525 Part-to-Part ’CT2525 5.0 3.5 4.0 ns Variation (Note 8) ’C2526 ’CT2526 5.0 5.0 ns trise, Maximum tfall Rise/Fall Time 5.0 3.0 4.0 3.75 ns (20% to 80% V CC) trise, Maximum tfall Rise/Fall Time 0.9 1.1 ns (0.8V/2.0V and 2.0V/0.8V) (Note 6) Range VCC (V) CGS74CT 54ACT CGS74CT TA ea 25§C TA eb 55§CT A eb 40§C Symbol Parameter CL e 50 pF to a125§Ct o a85§C Units CL e 50 pF C L e 50 pF Min Typ Max Min Max Min Max http:/ /www.national.com5
Over recommended operating conditions unless specified otherwise. (Continued) (Note 6) Range VCC (V) CGS74CT 54ACT CGS74CT TA ea 25§C TA eb 55§CT A eb 40§C Symbol Parameter CL e 50 pF to a125§Ct o a85§C Units CL e 50 pF C L e 50 pF Min Typ Max Min Max Min Typ Max tOSHL Maximum Skew Common Edge 5.0 0.2 550 psOutput-to-Output (Note 7) Variation tOSLH Maximum Skew Common Edge 5.0 0.2 550 ps Output-to-Output (Note 7) Variation tOST Maximum Skew Opposite Edge 5.0 0.4 1.0 nsOutput-to-Output (Note 7) Variation tPV Maximum Skew AC2525 Part-to-Part ACT2525 Variation (Note 8) AC2526 5.0 3.5 ns ACT2526 5.0 5.0 ns trise, Maximum tfall Rise/Fall Time 5.0 3.0 3.75 ns (20% to 80% V CC) trise, Maximum tfall Rise/Fall Time 0.9 1.1 ns (0.8V/2.0V and 2.0V/0.8V) Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: IIN and I CC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V CC. ICC for 54AC @ 25§C is identical to CGS74C @ 25§C. Note 4: Maximum test duration 2.0 ms, one output loaded at a time. Note 5: ICC for 54ACT @ 25§C is identical to CGS74CT @ 25§C. 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 (t OSHL) or LOW to HIGH (t OSLH) or in opposite directions both HL and LH (t OST). t OSHL and t OSLH 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 Note 9: Load capacitance includes the test jig. http:/ /www.national.com 6
Symbol Parameter Typ Units Conditions CIN Input Capacitance 4.5 pF V CC e 5.0V CPD Power Dissipation Capacitance (’2525) 820 pF–1.2 x 10 b18 (f)* pF V CC e 5.0V CPD Power Dissipation Capacitance (’2526) 820 pF–1.2 x 10 b18 (f)* pF V CC e 5.0V *f e frequency Recommended Maximum Power Dissipation (W) LFPM TA e 25§CT A e 85§C PDIP SOIC PDIP SOIC 0 1.105 0.858 0.528 0.41 225 1.493 1.055 0.714 0.504 500 1.71 1.210 0.820 0.578 Timing Diagrams TL/F/10684–27 TL/F/10684–28 Test Circuit TL/F/10684–29 RL is 500 X CL is 50 pF for all prop delays and skew measurements. http:/ /www.national.com7
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) http:/ /www.national.com 8
Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Integrated Circuit (M) 14-Lead Plastic Dual-In-Line Package (N) http:/ /www.national.com9
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) 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 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.
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