Revised March 2005 74LVT245 • 74LVTH245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs General Description Features The LVT245 and LVTH245 contain eight non-inverting bidirectional buffers with 3-STATE outputs and are 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 Z condition. ■ Input and output interface capability to systems at 5V VCC The LVTH245 data inputs include bushold, eliminating the need for external pull-up resistors to hold unused inputs. These transceivers are designed for low-voltage (3.3V) VCC applications, but with the capability to provide a TTL interface to a 5V environment. The LVT245 and LVTH245 are fabricated with an advanced BiCMOS technology to achieve high speed operation similar to 5V ABT while maintaining a low power dissipation. ■ Bushold data inputs eliminate the need for external pull-up resistors to hold unused inputs (74LVTH245), also available without bushold feature (74LVT245) ■ Live insertion/extraction permitted ■ Power Up/Down high impedance provides glitch-free bus loading ■ Outputs source/sink, 32 mA/64 mA ■ Latch-up performance exceeds 500 mA ■ ESD performance: Human-body model ! 2000V Machine model ! 200V Charged-device model ! 1000V Ordering Code: Order Number Package Package Description Number 74LVT245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LVT245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LVT245MSA MSA20 74LVT245MTC MTC20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVT245MTCX_NL (Note 1) MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVTH245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LVTH245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LVTH245MSA MSA20 74LVTH245MTC MTC20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVTH245MTCX_NL (Note 1) MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Pb-Free package per JEDEC J-STD-020B. Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only. © 2005 Fairchild Semiconductor Corporation DS500203 www.fairchildsemi.com 74LVT245 • 74LVTH245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs November 1999 74LVT245 • 74LVTH245 Pin Descriptions Logic Symbols Pin Names IEEE/IEC Description OE Output Enable Input 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 Outputs OE 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 Connection Diagram www.fairchildsemi.com 2 T/R Symbol Parameter VCC Supply Voltage VI DC Input Voltage VO Output Voltage IIK DC Input Diode Current IOK DC Output Diode Current IO DC Output Current Value Conditions 0.5 to 4.6 0.5 to 7.0 0.5 to 7.0 0.5 to 7.0 50 50 ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature Units V V Output in 3-STATE V Output in HIGH or LOW State (Note 3) VI GND V mA VO GND mA 64 VO ! VCC Output at HIGH State 128 VO ! VCC Output at LOW State mA r64 r128 65 to 150 mA mA qC Recommended Operating Conditions Symbol Parameter Min Max 2.7 3.6 V 0 5.5 V High-Level Output Current 32 mA Low-Level Output Current 64 mA VCC Supply Voltage VI Input Voltage IOH IOL TA Free Air Operating Temperature 't/'V Input Edge Rate, VIN 0.8V–2.0V, VCC 3.0V Units 40 85 qC 0 10 ns/V Note 2: Absolute Maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum rated conditions is not implied. Note 3: IO Absolute Maximum Rating must be observed. DC Electrical Characteristics Symbol VCC Parameter VIK Input Clamp Diode Voltage TA (V) 40qC to 85qC Min Max 1.2 2.7 V Conditions II 18 mA VO d 0.1V or VIH Input HIGH Voltage 2.7–3.6 VIL Input LOW Voltage 2.7–3.6 VOH Output HIGH Voltage 2.7–3.6 VCC - 0.2 V IOH 100 PA 2.7 2.4 V IOH 8 mA 3.0 2.0 V IOH 32 mA VOL II(HOLD) Output LOW Voltage 2.0 Units 0.8 0.2 V IOL 100 PA 2.7 0.5 V IOL 24 mA 3.0 0.4 V IOL 16 mA 3.0 0.5 V IOL 32 mA 3.0 0.55 V IOL 75 PA VI 0.8V 75 PA VI 2.0V 500 PA (Note 5) PA (Note 6) 3.0 II(OD) Bushold Input Over-Drive 3.0 (Note 4) Current to Change State II Input Current (Note 4) Power Off Leakage Current IPU/PD Power Up/Down VO t VCC 0.1V 2.7 Bushold Input Minimum Drive IOFF V 500 64 mA 3.6 10 PA VI 5.5V Control Pins 3.6 r1 PA VI 0V or VCC Data Pins 3.6 5 PA VI 0V 1 PA VI VCC 0 r100 PA 0V d VI or VO d 5.5V 0–1.5V r100 PA 3-STATE Current VO VI 0.5V to VCC GND to VCC 3-STATE Output Leakage Current 3.6 5 PA VO 0.5V IOZL (Note 4) 3-STATE Output Leakage Current 3.6 5 PA VO 0.0V 3-STATE Output Leakage Current 3.6 5 PA VO 3.0V IOZL IOZH 3 www.fairchildsemi.com 74LVT245 • 74LVTH245 Absolute Maximum Ratings(Note 2) 74LVT245 • 74LVTH245 DC Electrical Characteristics Symbol (Continued) VCC Parameter TA (V) 40qC to 85qC Min Units Conditions Max IOZH (Note 4) 3-STATE Output Leakage Current 3.6 5 PA VO IOZH 3-STATE Output Leakage Current 3.6 10 PA VCC VO d 5.5V ICCH Power Supply Current 3.6 0.19 mA Outputs HIGH ICCL Power Supply Current 3.6 5 mA Outputs LOW ICCZ Power Supply Current 3.6 0.19 mA ICCZ Power Supply Current 'ICC Increase in Power Supply Current (Note 7) 3.6 0.19 mA 3.6 0.2 mA 3.6V Outputs Disabled VCC d VO d 5.5V, Outputs Disabled One Input at VCC 0.6V Other Inputs at VCC or GND Note 4: Applies to Bushold versions only (LVTH245). Note 5: An external driver must source at least the specified current to switch from LOW-to-HIGH. Note 6: An external driver must sink at least the specified current to switch from HIGH-to-LOW. Note 7: This is the increase in supply current for each input that is at the specified voltage level rather than VCC or GND. Dynamic Switching Characteristics Symbol (Note 8) (V) 25qC TA VCC Parameter Min Conditions Units Typ CL Max 50 pF, RL VOLP Quiet Output Maximum Dynamic VOL 3.3 0.8 V (Note 9) VOLV Quiet Output Minimum Dynamic VOL 3.3 0.8 V (Note 9) 500: Note 8: Characterized in SOIC package. Guaranteed parameter, but not tested. Note 9: Max number of outputs defined as (n). n1 data inputs are driven 0V to 3V. Output under test held LOW. AC Electrical Characteristics 40qC to 85qC TA Symbol tPLH CL Parameter Propagation Delay tPHL tPZH Output Enable Time tPZL tPHZ Output Disable tPLZ tOSHL Output to Output Skew tOSLH (Note 10) 50 pF, RL 500: Units VCC 3.3V r 0.3V Min Max Min 1.2 3.6 1.2 4.0 1.2 3.5 1.2 4.0 1.3 5.5 1.3 7.1 1.7 5.7 1.7 6.7 VCC 2.7V Max 2.0 5.9 2.0 6.5 2.0 5.0 2.0 5.1 1.0 ns ns ns 1.0 ns Note 10: 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). Capacitance Symbol (Note 11) Parameter Conditions CIN Input Capacitance VCC 0V, VI CI/O Input/Output Capacitance VCC 3.0V, VO Note 11: Capacitance is measured at frequency f www.fairchildsemi.com 0V or VCC 0V or VCC 1 MHz, per MIL-STD-883, Method 3012. 4 Typical Units 4 pF 8 pF 74LVT245 • 74LVTH245 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B 5 www.fairchildsemi.com 74LVT245 • 74LVTH245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D www.fairchildsemi.com 6 74LVT245 • 74LVTH245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20 7 www.fairchildsemi.com 74LVT245 • 74LVTH245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 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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