54298 NSC | Alldatasheet

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Y Select from two data sources Y Fully edge-triggered operation Connection Diagram Dual-In-Line Package TL/F/10215–1 Order Number 54298DMQB or 54298FMQB See NS Package Number J16A or W16A Logic Symbol TL/F/10215–2 VCC e Pin 16 GND e Pin 8 Pin Names Description S Common Select Input CP Clock Pulse Input (Active Falling Edge) I0a–I0d Source 0 Data Inputs I1a–I1d Source 1 Data Inputs Qa, Qd Flip-Flop Outputs C1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Note) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage 7V Input Voltage 5.5V Operating Free Air Temperature Range b55§Ct o a125§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. The device should not be operated at these limits. The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings. The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual operation. Recommended Operating Conditions Symbol Parameter 54298 Units Min Nom Max VCC Supply Voltage 4.5 5 5.5 V VIH High Level Input Voltage 2 V VIL Low Level Input Voltage 0.8 V IOH High Level Output Current b0.8 mA IOL Low Level Output Current 16 mA TA Free Air Operating Temperature b55 125 §C ts (H) Setup Time HIGH or LOW 25 nsts ( L ) St oC P 25 th (H) Hold Time HIGH or LOW 0 nsth ( L ) St oC P 0 ts (H) Setup Time HIGH or LOW 15 nsts (L) I 0x or I 1x to CP 15 th (H) Hold Time HIGH or LOW 5.0 nsth (L) I 0x or I 1x to CP 5.0 tw (H) CP Pulse Width HIGH or LOW 20 nstw (L) 20 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 1) VI Input Clamp Voltage V CC e Min, I I eb 12 mA b1.5 V VOH High Level V CC e Min, I OH e Max, 2.4 VOutput Voltage V IL e Max, V IH e Min VOL Low Level V CC e Min, I OL e Max, 0.4 VOutput Voltage V IH e Min, V IL e Max II Input Current @ VCC e Max, V I e 5.5V 1m AMax Input Voltage IIH High Level V CC e Max, V I e 2.4V 40 mAInput Current IIL Low Level V CC e Max, V I e 0.4V b1.6 mAInput Current IOS Short Circuit V CC e Max b20 b57 mAOutput Current (Note 2) ICC Supply Current V CC e Max (Note 3) 65 mA Note 1: All typicals are at V CC e 5V, T A e 25§C. Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 3: ICC is measured with all outputs open and all inputs grounded.

Switching Characteristics VCC ea 5.0V, T A ea 25§C (See Section 1 for test waveforms and output load) CL e 15 pF Symbol Parameter R L e 400X Units Min Max tPLH Propagation Delay, CP to Q n 27 nstPHL 32 Functional Description This device is a high speed quad 2-port register. It selects four bits of data from two sources (ports) under the control of a Common Select input (S). The selected data is trans- ferred to the 4-bit output register synchronous with the HIGH-to-LOW transition of the Clock input (CP ). The 4-bit output register is fully edge-triggered. The Data inputs (I nx) and Select input (S) need be stable only one setup time prior to the HIGH-to-LOW transition of the clock for predict- able operation. Truth Table Inputs Output SI 0x I1x Qx II X L Ih X H hX l L hX h H l e LOW Voltage Level one setup time prior to the HIGH-to-LOWclock transition. h e HIGH Voltage Level one setup time prior to the HIGH-to-LOW clock transition. H e HIGH Voltage level L e LOW Voltage level X e Immaterial Logic Diagram TL/F/10215–3

54298 Quad 2-Port Register (Multiplexer With Storage)

Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54298DMQB 16-Lead Ceramic Flat Package (W) Order Number 54298FMQB 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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