Revised June 2001 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. ■ Ideal for low power/low noise 3.3V applications ■ Implements patented EMI reduction circuitry ■ Available in SOIC JEDEC, SOIC EIAJ and QSOP packages ■ Guaranteed simultaneous switching noise level and dynamic threshold performance ■ Improved latch-up immunity ■ Guaranteed incident wave switching into 75Ω ■ 4 kV minimum ESD immunity Ordering Code Order Number Package Number 74LVQ245SC 74LVQ245SJ 74LVQ245QSC Package Description M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MQA20 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names Truth Table Inputs Outputs OE 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 © 2001 Fairchild Semiconductor Corporation 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 X = Immaterial DS011357 www.fairchildsemi.com 74LVQ245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Outputs February 1992 74LVQ245 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC) Recommended Operating Conditions (Note 2) −0.5V to +7.0V DC Input Diode Current (IIK) Supply Voltage (VCC) 2.0V to 3.6V VI = −0.5V −20 mA Input Voltage (VI) 0V to VCC VI = VCC + 0.5V +20 mA Output Voltage (VO) 0V to VCC DC Input Voltage (VI) −0.5V to VCC + 0.5V Minimum Input Edge Rate (∆V/∆t) VO = −0.5V −20 mA VIN from 0.8V to 2.0V VO = VCC + 0.5V +20 mA VCC @ 3.0V DC Output Voltage (VO) −40°C to +85°C Operating Temperature (TA) DC Output Diode Current (IOK) 125 mV/ns −0.5V to VCC + 0.5V DC Output Source ±50 mA or Sink Current (IO) DC VCC or Ground Current 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. ±400 mA (ICC or IGND) Storage Temperature (TSTG) −65°C to +150°C DC Latch-Up Source or ±300 mA Sink Current Note 2: Unused inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol VIH Parameter Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage VOL Maximum Low Level Output Voltage TA = +25°C VCC TA = −40°C to +85°C Units (V) Typ 3.0 1.5 2.0 2.0 V 3.0 1.5 0.8 0.8 V 3.0 2.99 2.9 2.9 V 3.0 2.58 2.48 V 0.1 0.1 V 3.0 0.36 0.44 V ±0.1 ±1.0 µA 3.0 Conditions Guaranteed Limits 0.002 VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V IOUT = −50 µA VIN = VIL or VIH (Note 3) IOH = −12 mA IOUT = 50 µA VIN = VIL or VIH (Note 3) IOL = +12 mA VI = VCC, GND IIN Maximum Input Leakage Current 3.6 IOLD Minimum Dynamic 3.6 36 mA VOLD = 0.8V Max (Note 5) IOHD Output Current (Note 4) 3.6 −25 mA VOHD = 2.0V Min (Note 5) ICC Maximum Quiescent Supply Current IOZT 3.6 4.0 40.0 µA 3.6 ±0.3 ±3.0 µA or GND VI (OE) = V IL, VIH Maximum I/O Leakage Current VIN = VCC VI = VCC, GND VO = VCC, GND VOLP Quiet Output Maximum Dynamic VOL 3.3 0.5 0.8 V (Note 6)(Note 7) VOLV Quiet Output Minimum Dynamic VOL 3.3 −0.5 −0.8 V (Note 6)(Note 7) VIHD Maximum High Level Dynamic Input Voltage 3.3 1.6 2.0 V (Note 6)(Note 8) VILD Maximum Low Level Dynamic Input Voltage 3.3 1.7 0.8 V (Note 6)(Note 8) 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. www.fairchildsemi.com 2 TA = +25°C Symbol Parameter tPHL Propagation Delay tPLH tPZL Output Enable Time tPZH Output Disable Time tPHZ tPLZ tOSHL Output to Output tOSLH Skew (Note 9) TA = −40°C to +85°C CL = 50 pF VCC CL = 50 pF (V) Min Typ Max Min Max 2.7 2.0 9.0 14.0 2.0 15.0 3.3 ± 0.3 2.0 7.5 10.0 2.0 10.5 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 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). Parameter guaranteed by design. Capacitance Symbol Typ Units Input Capacitance 4.5 pF CI/O Input/Output Capacitance 15 pF VCC = 3.3V CPD (Note 10) Power Dissipation Capacitance 67 pF VCC = 3.3V CIN Parameter Conditions VCC = Open Note 10: CPD is measured at 10 MHz. 3 www.fairchildsemi.com 74LVQ245 AC Electrical Characteristics 74LVQ245 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B www.fairchildsemi.com 4 74LVQ245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 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 Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide Package Number MQA20 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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