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74LVX245 Low Voltage Octal Bidirectional Transceiver April 1993 Revised March 1999 74LVX245 Low Voltage Octal Bidirectional Transceiver General Description The LVX245 contains eight non-inverting bidirectional buffers and is intended for bus-oriented applications. 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 impedance condition. Features s Ideal for low power/low noise 3.3V applications s Guaranteed simultaneous switching noise level and dynamic threshold performance Ordering Code Order Number 74LVX245M 74LVX245SJ 74LVX245MTC 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 the suffix letter "X" to the ordering code. Logic Symbols Connection Diagram Pin Descriptions Pin Names OE T/R A0­A7 B0­B7 Output Enable Input Transmit/Receive Input Side A Inputs or 3-STATE Outputs Side B Inputs or 3-STATE Outputs Description Truth Table Inputs OE L L H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Outputs T/R L H X Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State © 1999 Fairchild Semiconductor Corporation DS011597.prf www.fairchildsemi.com 74LVX245 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC) DC Input Diode Current (IIK) VI = -0.5V DC Input Voltage T/R, OE (VI) DC Diode Current (IOK) VO = -0.5V VO = VCC + 0.5V DC Bus I/O Voltage (VI/O) DC Output Source or Sink Current (IO) DC VCC or Ground Current (ICC or IGND) Storage Temperature (TSTG) Power Dissipation ±75 mA -65°C to +150°C 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 T/R, OE (VI) Bus I/O Voltage (VI/O) Operating Temperature (TA) Input Rise and Fall Time (t/V) 2.0V to 3.6V 0V to 5.5V 0V to VCC -40°C to +85°C 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 3-STATE Output Off-State Current IIN ICC Input Leakage Current Quie