74LVQ245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Outputs General Description Features The LVQ245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus-oriented applications. Current sinking capability is 12 mA at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a HIGH Z condition. n Ideal for low power/low noise 3.3V applications n Implements patented EMI reduction circuitry n Available in SOIC JEDEC, SOIC EIAJ and QSOP packages n Guaranteed simultaneous switching noise level and dynamic threshold performance n Improved latch-up immunity n Guaranteed incident wave switching into 75Ω n 4 kV minimum ESD immunity Ordering Code Order Number Package Number 74LVQ245SC M20B 74LVQ245SJ M20D 74LVQ245QSC Package Description 20-Lead (0.300" Wide) Small Outline Package, SOIC JEDEC 20-Lead Molded Shrink Small Outline Package, SOIC EIAJ MQA20 20-Lead (0.150" Wide) Molded Shrink Small Outline Package, SSOP JEDEC 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 and QSOP DS011357-1 IEEE/IEC DS011357-3 DS011357-2 © 1998 Fairchild Semiconductor Corporation DS011357 www.fairchildsemi.com 74LVQ245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Outputs May 1998 Pin Descriptions Pin Names Description OE Output Enable Inputs T/R Transmit/Receive Input A0–A7 Side A Inputs or 3-STATE Outputs B0–B7 Side B Inputs or 3-STATE Outputs Truth Table Inputs OE Outputs T/R L L Bus B Data to Bus A L H Bus A Data to Bus B H X HIGH-Z State H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial 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 Recommended Operating Conditions (Note 2) −0.5V to +7.0V 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 −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V 2.0V to 3.6V 0V to VCC 0V to VCC −40˚C to +85˚C 125 mV/ ns 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. ± 50 mA ± 400 mA −65˚C to +150˚C Note 2: Unused inputs must be held HIGH or LOW. They may not float. ± 300 mA DC Electrical Characteristics Symbol Parameter VCC (V) TA = +25˚C Typ VIH VIL VOH Minimum High Level Input Voltage 3.0 Maximum Low Level Input Voltage 3.0 Minimum High Level Output Voltage 1.5 TA = −40˚C to +85˚C Units Conditions Guaranteed Limits 2.0 2.0 V VOUT = 0.1V or VCC − 0.1V 1.5 0.8 0.8 V VOUT = 0.1V or VCC − 0.1V 2.9 2.9 V IOUT = −50 µA 2.58 2.48 V VIN = VIL or VIH (Note 3) 0.1 0.1 V IOUT = 50 µA 3.0 0.36 0.44 V VIN = VIL or VIH (Note 3) 3.6 ± 0.1 ± 1.0 µA 3.0 2.99 3.0 IOH = −12 mA VOL Maximum Low Level Output Voltage 3.0 0.002 IOL = +12 mA IIN Maximum Input Leakage Current IOLD Minimum Dynamic Output Current (Note 4) IOHD VI = VCC, GND 3.6 36 mA VOLD = 0.8V Max (Note 5) 3.6 −25 mA VOHD = 2.0V Min (Note 5) 40.0 µA 3.6 Maximum I/O Leakage Current 3.6 VOLP Quiet Output Maximum Dynamic VOL 3.3 0.5 0.8 V (Notes 6, 7) VOLV Quiet Output Minimum Dynamic VOL 3.3 −0.5 −0.8 V (Notes 6, 7) VIHD Maximum High Level Dynamic Input Voltage 3.3 1.6 2.0 V (Notes 6, 8) VILD Maximum Low Level Dynamic Input Voltage 3.3 1.7 0.8 V (Notes 6, 8) IOZT 4.0 VIN = VCC Maximum Quiescent Supply Current ICC or GND ± 0.3 ± 3.0 µA VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND 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 75Ω for commercial temperature range is guaranteed for 74LVQ. 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. 3 www.fairchildsemi.com AC Electrical Characteristics Symbol tPLH Min Typ Max Min Max 2.0 9.0 14.0 2.0 15.0 3.3 ± 0.3 2.0 7.5 10.0 2.0 10.5 Output Enable Time tPZL tPZH 2.7 3.0 10.2 18.3 3.0 19.0 3.3 ± 0.3 3.0 8.5 13.0 3.0 13.5 2.7 1.0 10.2 20.4 1.0 21.0 3.3 ± 0.3 1.0 8.5 14.5 1.0 15.0 2.7 1.0 1.5 1.5 3.3 ± 0.3 1.0 1.5 1.5 Output Disable Time tPHZ tPLZ tOSHL Output to Output tOSLH Skew (Note 9) TA = −40˚C to +85˚C CL = 50 pF 2.7 Propagation Delay tPHL TA = +25˚C CL = 50 pF VCC (V) Parameter Units ns ns ns ns 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). Parameterguaranteed by design. Capacitance Typ Units CIN Symbol Input Capacitance Parameter 4.5 pF VCC = Open CI/O Input/Output Capacitance 15 pF VCC = 3.3V CPD (Note 10) Power Dissipation Capacitance 67 pF VCC = 3.3V Note 10: CPD is measured at 10 MHz. www.fairchildsemi.com 4 Conditions Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead (0.300" Wide) Small Outline Package, SOIC JEDEC Package Number M20B 20-Lead Molded Shrink Small Outline Package, SOIC EIAJ Package Number M20D 5 www.fairchildsemi.com 74LVQ245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead (0.150" Wide) Molded Shrink Small Outline Package, SSOP JEDEC (also known as QSOP) Package Number MQA20 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. 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