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74LVX273 Low Voltage Octal D-Type Flip-Flop
June 1993 Revised March 1999
74LVX273 Low Voltage Octal D-Type Flip-Flop
General Description
The LVX273 has eight edge-triggered D-type flip-flops with individual D inputs and Q outputs. The common buffered Clock (CP) and Master Reset (MR) input load and reset (clear) all flip-flops simultaneously. The register is fully edge-triggered. The state of each D input, one setup time before the LOW-to-HIGH clock transition, is transferred to the corresponding flip-flop's Q output. All outputs will be forced LOW independently of Clock or Data inputs by a LOW voltage level on the MR input. The device is useful for applications where the true output only is required and the Clock and Master Reset are common to all storage elements. The inputs tolerate up to 7V allowing interface of 5V systems to 3V systems.
Features
s Input voltage translation from 5V to 3V s Ideal for low power/low noise 3.3V applications s Guaranteed simultaneous switching noise level and dynamic threshold performance
Ordering Code:
Order Number 74LVX273M 74LVX273SJ 74LVX273MTC Package Number M20B M20D MTC20 Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending letter suffix "X" to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names D0-D7 MR CP Q0-Q7 Description Data Inputs Master Reset Clock Pulse Input Data Outputs
(c) 1999 Fairchild Semiconductor Corporation
DS011614.prf
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74LVX273
Truth Table
Operating Mode MR Reset (Clear) Load '1' Load '0'
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = LOW-to-HIGH Transition
Inputs CP Dn X H L
Outputs Qn L H L
L H H

X
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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74LVX273
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) DC Input Diode Current (IIK) VI = -0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = -0.5V VO = VCC +0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current (ICC or IGND) Storage Temperature (TSTG) Power Dissipation 75 mA -65C to +150C 180 mW 25 mA -20 mA +20 mA -0.5V to VCC + 0.5V -20 mA -0.5V to 7V -0.5V to +7.0V
Recommended Operating Conditions (Note 2)
Supply Voltage (VCC) Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) Input Rise and Fall Time (t/V) 2.0V to 3.6V 0V to 5.5V 0V to VCC -40C to +85C 0 ns/V to 100 ns/V
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 Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Note 2: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol VIH Parameter HIGH Level Input Voltage VIL LOW Level Input Voltage VOH HIGH Level Output Voltage VOL LOW Level Output Voltage IOZ IIN ICC 3-STATE Output Off-State Current Input Leakage Current Quiescent Supply Current 3.6 3.6 0.1 4.0 1.0 40.0 A A VCC 2.0 3.0 3.6 2.0 3.0 3.6 2.0 3.0 3.0 2.0 3.0 3.0 3.6 1.9 2.9 2.58 0.0 0.0 0.1 0.1 0.36 0.25 2.0 3.0 TA = +25C Min 1.5 2.0 2.4 0.5 0.8 0.8 1.9 2.9 2.48 0.1 0.1 0.44 2.5 A VIN = VIH or VIL VOUT = VCC or GND VIN = 5.5V or GND VIN = VCC or GND V V Typ Max TA = -40C to +85C Min 1.5 2.0 2.4 0.5 0.8 0.8 VIN = VIH or VIL IOH = -50 A IOH = -50 A IOH = -4 mA VIN = VIH or VIL IOL = 50 A IOL = 50 A IOL = 4 mA V V Max Units Conditions
Noise Characteristics (Note 3)
Symbol VOLP VOLV VIHD VILD Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum LOW Level Dynamic Input Voltage VCC (V) 3.3 3.3 3.3 3.3 TA = 25C Typ 0.5 -0.5 Limit 0.8 -0.8 2.0 0.8 V V V V Units CL (pF) 50 50 50 50
Note 3: Input tr = tf = 3ns
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74LVX273
AC Electrical Characteristics
Symbol tPLH tPHL Parameter Propagation Delay Time CP to Qn tPHL Propagation Delay MR to Qn 3.3 0.3 tS tH tREC tW tW fMAX Setup Time Dn to CP Hold Time Dn to CP Removal Time MR to CP Clock Pulse Width MR Pulse Width Maximum Clock Frequency tOSLH tOSHL Output to Output Skew (Note 4) 3.3 0.3 2.7 3.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 8.0 5.5 1.0 1.0 4.0 2.5 8.0 5.5 7.5 5.0 55 45 95 60 110 60 150 90 1.5 1.5 3.3 0.3 2.7 VCC (V) 2.7 TA = +25C Min Typ 9.0 11.5 7.1 9.6 9.3 11.8 7.3 9.8 Max 16.9 20.0 11.0 14.5 17.8 21.1 11.5 15.0 TA = -40C to +85C Min 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 9.5 6.5 1.0 1.0 4.0 2.5 9.5 6.5 8.5 ns 6.0 45 40 80 50 1.5 1.5 ns MHz 15 50 15 50 50 Max 20.5 24.0 13.0 16.5 20.5 24.0 13.5 17.0 ns ns ns ns ns ns Units CL (pF) 15 50 15 50 15 50 15 50
Note 4: Parameter guaranteed by design. tOSLH = |tPLHm - tPLHn|, tOSHL = |tPHLm - tPHLn|
Capacitance
Symbol CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (Note 5)
Note 5: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Parameter
TA = +25C Min Typ 4 6 31 Max 10
TA = -40C to +85C Min Max 10
Units pF pF pF
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74LVX273
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
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74LVX273 Low Voltage Octal D-Type Flip-Flop
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 LIFE SUPPORT POLICY FAIRCHILD'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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or systems device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the sonably expected to cause the failure of the life support body, or (b) support or sustain life, and (c) whose failure device or system, or to affect its safety or effectiveness. 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 www.fairchildsemi.com user.
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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