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| 74LVQ157 Low Voltage Quad 2-Input Multiplexer May 1998 74LVQ157 Low Voltage Quad 2-Input Multiplexer General Description The LVQ157 is a high-speed quad 2-input multiplexer. Four bits of data from two sources can be selected using the common Select and Enable inputs. The four outputs present the selected data in the true (noninverted) form. The LVQ157 can also be used as a function generator. Features n Ideal for low power/low noise 3.3V applications n Guaranteed simultaneous switching noise level and dynamic threshold performance n Guaranteed pin-to-pin skew AC performance n Guaranteed incident wave switching into 75. Ordering Code: Order Number 74LVQ157SC 74LVQ157SJ Package Number M16A M16D Package Description 16-Lead (0.150" Wide) Small Outline Integrated Circuit, SOIC JEDEC 16-Lead Molded Small Outline Package, SOIC EIAJ Devices also available in Tape and Reel. Specify by appending suffix letter "X" to the ordering code. Logic Symbols Connection Diagram Pin Assignment for SOIC JEDEC and EIAJ DS011352-1 IEEE/IEC DS011352-2 Pin Descriptions Pin Names I0a-I0d I1a-I1d E S Za-Zd DS011352-3 Description Source 0 Data Inputs Source 1 Data Inputs Enable Input Select Input Outputs (c) 1998 Fairchild Semiconductor Corporation DS011352 www.fairchildsemi.com Truth Table Inputs E H L L L L S X H H L L I0 X X X L H I1 X L H X X Outputs Z L L H L H Functional Description The LVQ157 is a quad 2-input multiplexer. It selects four bits of data from two sources under the control of a common Select input (S). The Enable input (E) is active-LOW. When E is HIGH, all of the outputs (Z) are forced LOW regardless of all other inputs. The LVQ157 is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input. The logic equations for the outputs are shown below: Za = E * (I1a * S + I0a * S ) Zb = E * (I1b * S + I0b * S ) Zc = E * (I1c * S + I0c * S ) Zd = E * (I1d * S + I0d * S ) A common use of the LVQ157 is the moving of data from two groups of registers to four common output busses. The particular register from which the data comes is determined by the state of the Select input. A less obvious use is as a function generator. The LVQ157 can generate any four of the sixteen different functions of two variables with one variable common. This is useful for implementing gating functions. H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Logic Diagram DS011352-5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 Absolute Maximum Ratings (Note 1) Supply Voltage (VCC) DC Input Diode Current (IIK) VI = -0.5V VI = VCC + 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) DC Latch-Up Source or Sink Current -0.5V to +7.0V -20 mA +20 mA -0.5V to VCC + 0.5V -20 mA +20 mA -0.5V to VCC + 0.5V Recommended Operating Conditions (Note 2) Supply Voltage (VCC) Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) Minimum Input Edge Rate (V/t) VIN from 0.8V to 2.0V VCC @ 3.0V 2.0V to 3.6V 0V to VCC 0V to VCC -40C to +85C 125 mV/ns 50 mA 200 mA -65C to +150C 100 mA 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 Parameter VCC (V) 3.0 3.0 3.0 3.0 3.0 3.0 3.6 3.6 3.6 3.6 3.3 3.3 3.3 3.3 0.7 -0.4 1.7 1.6 4.0 0.8 -0.8 2.0 0.8 0.002 TA = +25C Typ VIH VIL VOH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 2.99 2.9 2.58 0.1 0.36 2.9 2.48 0.1 0.44 V V V V A mA mA A V V V V 1.5 0.8 0.8 V 1.5 2.0 TA = -40C to +85C Guaranteed Limits 2.0 V VOUT = 0.1V or VCC - 0.1V VOUT = 0.1V or VCC - 0.1V IOUT = -50 A VIN = VIL or VIH (Note 3) IOH = -12 mA VOL Maximum Low Level Output Voltage IOUT = 50 A VIN = VIL or VIH (Note 3) IOL = 12 mA IIN IOLD IOHD ICC VOLP VOLV VIHD VILD Maximum Input Leakage Current Minimum Dynamic Output Current (Note 4) Maximum Quiescent Supply Current Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Maximum High Level Dynamic Input Voltage Maximum Low Level Dynamic Input Voltage Note 3: All outputs loaded; thresholds on input associated with output under test. Note 4: Maximum test duration 2.0 ms, one output loaded at a time. Note 5: Incident wave switching on transmission lines with impedances as low as 75 for commercial temperature range is guaranteed for. Note 6: Worst case package. Note 7: Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V; one output at GND. Note 8: Max number of Data Inputs (n) switching. (n - 1) inputs switching 0V to 3.3V. Input-under-test switching: 3.3V to threshold (VILD), 0V to threshold (VIHD), f = 1 MHz. Units Conditions 0.1 1.0 36 -25 40.0 VI = VCC, GND VOLD = 0.8V Max (Note 5) VOHD = 2.0V Min (Note 5) VIN = VCC or GND (Notes 6, 7) (Notes 6, 7) (Notes 6, 8) (Notes 6, 8) 3 www.fairchildsemi.com AC Electrical Characteristics TA = +25C CL = 50 pF Min tPLH tPHL tPLH tPHL tPLH tPHL tOSHL, tOSLH Propagation Delay S to Zn Propagation Delay S to Zn Propagation Delay E to Zn Propagation Delay E to Zn Propagation Delay In to Zn Propagation Delay In to Zn Output to Output Skew (Note 9) Data to Output 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 3.3 0.3 2.7 3.3 0.3 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Typ 84 7.0 7.8 6.5 8.4 7.0 7.8 6.5 6.0 5.0 6.0 5.0 1.0 1.0 Max 16.2 11.5 15.5 11.0 16.2 11.5 15.5 11.0 12.0 8.5 11.3 8.0 1.5 1.5 TA = -40C to +85C CL = 50 pF Min 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.0 1.0 1.0 1.0 Max 19.0 13.0 17.0 12.0 19.0 13.0 17.0 12.0 13.0 9.0 13.0 9.0 1.5 1.5 ns ns ns ns ns ns ns Symbol Parameter VCC (V) Units Note 9: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH). Parameter guaranteed by design. Capacitance Symbol CIN CPD (Note 10) Parameter Input Capacitance Power Dissipation Capacitance Note 10: CPD is measured at 10 MHz. Typ 4.5 34.0 Units pF pF Conditions VC = Open VCC = 3.3V www.fairchildsemi.com 4 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead (0.150" Wide) Small Outline Integrated Circuit, SOIC JEDEC Package Number M16A 16-Lead Molded Small Outline Package, SOIC EIAJ Package Number M16D 5 www.fairchildsemi.com 74LVQ157 Low Voltage Quad 2-Input Multiplexer 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 sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and (c) whose device or system, or to affect its safety or effectiveness. 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. Fairchild Semiconductor Corporation Americas Customer Response Center Tel: 1-888-522-5372 Fax: 972-910-8036 Fairchild Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 8 141-35-0 English Tel: +44 (0) 1 793-85-68-56 Italy Tel: +39 (0) 2 57 5631 Fairchild Semiconductor Hong Kong Ltd. 8/F Room 808 Empire Centre 68 Mody Road, Tsimshatsui East Kowloon, Hong Kong Tel: 852-2722-8338 Fax: 852-2722-8383 Fairchild Semiconductor Japan Ltd. 4F, Natsume BI, 2-18-6 Yushima, Bunkyo-ku, Tokyo 113-0034, Japan Tel: 81-3-3818-8840 Fax: 81-3-3818-8450 www.fairchildsemi.com 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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