CGS74LCT2524M

CGS74LCT2524 1 to 4 Minimum Skew (300 ps) 3V Clock Driver November 2003 CGS74LCT2524 1 to 4 Minimum Skew (300 ps) 3V Clock Driver General Description This minimum skew clock driver is a 3V option of the current CGS74CT2524 Minimum Skew Clock Driver and is designed for Clock Generation and Support (CGS) applications operating at low voltage, high frequencies. 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. This minimum skew clock driver with one input driving four outputs, is specifically designed for signal generation and clock distribution applications. Features n Ideal for low power/low noise high speed applications n Guaranteed: — 300 ps pin-to-pin skew (tOSHL and tOSLH) n Implemented on National’s FACT™ family process n 1 input to 4 outputs low skew clock distribution n Symmetric output current drive: 12 mA IOH/IOL n Industrial temperature of −40˚C to +85˚C n 8-pin SOIC package n Low dynamic power consumption above 20 MHz n Guaranteed 2 kV ESD protection Logic Symbol Connection Diagrams Pin Assignment SOIC (MO) 01195601 The output pins act as a single entity and will follow the state of the CLK when the clock distribution chip is selected. 01195602 Pin Description Pin Names CLK O0–O3 Outputs Description Clock Input Truth Table Inputs CLK L H L = Low Logic Level H = High Logic Level Outputs 01195603 O0–O3 L H See NS Package Number M08A FACT™ is a trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation DS011956 www.national.com CGS74LCT2524 Absolute Maximum Ratings (Note 1) Junction Temperature (θJA) Airflow 0 225 500 LFM M 167 132 117 ˚C/W If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Voltage Diode Current (IIK) V = −0.5V V = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IO) V = −0.5V V = VCC + 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) −20 mA +20 mA −0.5V to VCC +0.5V −20 mA +20 mA −0.5V to VCC +0.5V −0.5V to 7.0V Recommended Operating Conditions Supply Voltage (VCC) Input Voltage (VIN) Output Voltage (VO) Operating Temperature (TA) Industrial Commercial Input Rise and Fall Times (0.8V to 2.0V) Note 1: 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. 3.0V to 3.6V 0V to VCC 0V to VCC −40˚C to +85˚C 0˚C to +70˚C 9.6 ns max ± 50 mA ± 50 mA −65˚C to +150˚C DC Electrical Characteristics Over recommended operating conditions unless specified otherwise. Symbol VIH VIL VOH VOL IIN ICCT IOLD IOHD ICC Parameter Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage Minimum Low Level Output Voltage Maximum Input Leakage Current Maximum ICC/Input Minimum Dynamic Output Current Maximum Quiescent Supply Current VIN = 3.0V VOLD = 0.8V (max) VOHD = 2.0V (min) VIN = VCC or GND 3.6 3.6 3.6 3.6 2.5 100 36 −25 10 µA mA mA µA VIN = VIL or VIH, IOUT = −50 µA VIN = VIL or VIH, IOH = −12 mA VIN = VIL or VIH, IOUT = 50 µA VIN = VIL or VIH, IOL = −12 mA VIN = VCC, GND 3.0 3.0 3.0 3.0 3.6 2.9 2.5 0.1 0.3 2.9 2.4 0.1 0.4 V V V V µA VOUT = 0.1V or VCC−0.1V 3.6 1.5 0.8 0.8 V Conditions VOUT = 0.1V or VCC−0.1V VCC (V) 3.6 CGS74LCT2524 TA = +25˚C Typ 1.5 2.0 TA = −40˚C to +85˚C Guaranteed Limits 2.0 V Units ± 0.1 ± 1.0 www.national.com 2 CGS74LCT2524 AC Electrical Characteristics Over recommended operating conditions unless specified otherwise. All typical values are measured at VCC = 3.3V, TA = 25˚C LCT2524 VCC = 3.0V to 3.6V Symbol Parameter TA = −40˚C to +85˚C CL = 50 pF RL = 500Ω Min tPLH tPHL Low-to-High Propagation Delay CLK to On High-to-Low Propagation Delay CLK to On 6 15.0 ns 6 Typ Max 15.0 ns Units Extended AC Electrical Characteristics Over recommended operating conditions unless specified otherwise. All typical values are measured at VCC = 3.3V, TA = 25˚C LCT2524 VCC = 3.0V to 3.6V Symbol Parameter TA = −40˚C to +85˚C CL = 50 pF RL = 500Ω Min fmax tOSHL tOSLH tPS tRISE tFALL THIGH TLOW Maximum Operating Frequency Maximum Skew Common Edge Output-to-Output Variation (Note 2) Maximum Skew Common Edge Output-to-Output Variation (Note 2) Maximum Skew Pin (Signal) Transition Variation (Note 3) Rise Time/Fall Time (from 0.8V to 2.0V/2.0V to 0.8V) Time High Time Low 4 4 ns ns 2.5 ns 2.5 ns 300 ps Typ 75 300 Max MHz ps Units Note 2: 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). Limits are characterized and guaranteed by design @ 66 MHz. Note 3: Pin transition skew is the absolute difference between HIGH-to-LOW and LOW-to-HIGH propagation delay, measured at a given output pin. Note 4: Refer to Minimum Skew Parameters Measurement Information Chart for definitions of each skew specification. Note 5: Load capacitance includes the test jig. Timing Diagrams 01195605 3 www.national.com CGS74LCT2524 Timing Diagrams (Continued) 01195606 01195604 Test Circuit 01195607 RL is 500Ω CL is 50 pF for all propagation delays and skew measurements. Ordering Information keting for specific date of availability) (Contact NSC Mar- 01195608 www.national.com 4 CGS74LCT2524 1 to 4 Minimum Skew (300 ps) 3V Clock Driver Physical Dimensions unless otherwise noted inches (millimeters) 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC Order Number CGS74LCT2524M NS Package Number M08A 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 AND GENERAL COUNSEL 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. 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