Revised March 2005 74LVT2245 • 74LVTH2245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25: Series Resistors in the B Port Outputs General Description Features The LVT2245 and LVTH2245 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 (activeHIGH) 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 state. The equivalent 25:-series resistor in the B Port helps reduce output overshoot and undershoot. ■ Input and output interface capability to systems at 5V VCC The LVTH2245 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 LVT2245 and LVTH2245 are fabricated with an advanced BiCMOS technology to achieve high speed operation similar to 5V ABT while maintaining low power dissipation. ■ Equivalent 25: series resistor on B Port outputs ■ Bushold data inputs eliminate the need for external pull-up resistors to hold unused inputs (74LVTH2245), also available without bushold feature (74LVT2245) ■ Live insertion/extraction permitted ■ Power Up/Down high impedance provides glitch-free bus loading ■ Outputs source/sink 12 mA/12 mA on B Port, 32 mA/64 mA on A Port ■ 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 74LVT2245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LVT2245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LVT2245MSA MSA20 74LVT2245MTC 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 74LVT2245MTCX_NL (Note 1) MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVTH2245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LVTH2245SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LVTH2245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74LVTH2245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74LVTH2245MTCX_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 DS012173 www.fairchildsemi.com 74LVT2245 • 74LVTH2245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25: Series Resistors in the B Port Outputs November 1999 74LVT2245 • 74LVTH2245 Pin Descriptions Logic Symbols IEEE/IEC Pin Names 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 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 Conditions Units V V Output in 3-STATE V Output in HIGH or LOW State (Note 3) VI GND 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 VCC Supply Voltage VI Input Voltage IOH HIGH-Level Output Current Min Max Units 2.7 3.6 V 0 5.5 V 32 12 mA A Port B Port IOL LOW-Level Output Current TA Free Air Operating Temperature 't/'V Input Edge Rate, VIN 0.8V–2.0V, VCC 3.0V A Port 64 B Port 12 mA 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. 3 www.fairchildsemi.com 74LVT2245 • 74LVTH2245 Absolute Maximum Ratings(Note 2) 74LVT2245 • 74LVTH2245 DC Electrical Characteristics Symbol VCC Parameter VIK Input Clamp Diode Voltage TA (V) VIH Input HIGH Voltage 2.7–3.6 Input LOW Voltage 2.7–3.6 VOH Output HIGH Voltage A Port B Port Output LOW Voltage A Port B Port II(HOLD) Bushold Input Minimum Drive Bushold Input Over-Drive (Note 4) Current to Change State II Input Current Data Pins IOFF Power Off Leakage Current IPU/PD Power Up/Down 0.8 2.7 2.4 3.0 2.0 3.0 2.0 2.7–3.6 VCC0.2 3-STATE Current Conditions II V VO d 0.1V or V VO t VCC 0.1V IOH 8 mA IOH 32 mA V IOH 12 mA V IOH 100 PA IOL 24 mA IOL 16 mA IOL 32 mA IOL 64 mA 12 mA V 0.5 3.0 0.4 3.0 0.5 3.0 0.55 3.0 0.8 V IOL 2.7 0.2 V IOL 75 V PA 75 500 PA 500 18 mA V 2.7 3.0 Control Pins Units 2.0 3.0 (Note 4) II(OD) Max 1.2 2.7 VIL VOL 40qC to 85qC Min 100 PA VI 0.8V VI 2.0V (Note 5) (Note 6) 3.6 10 VI 5.5V 3.6 r1 VI 0V or VCC VI 0V VI VCC 5 3.6 PA 1 0 r100 PA 0–1.5V r100 PA 0V d VI or VO d 5.5V VO VI 0.5V to 3.0V GND or VCC IOZL 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 IOZH 3-STATE Output Leakage Current 3.6 5 PA VO 3.0V IOZH (Note 4) 3-STATE Output Leakage Current 3.6 5 PA VO 3.6V 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 Outputs Disabled ICCZ Power Supply Current 3.6 0.19 mA VCC d VO d 5.5V, Outputs Disabled 'ICC Increase in Power Supply Current 3.6 0.2 mA (Note 7) One Input at VCC 0.6V Other Inputs at VCC or GND Note 4: Applies to Bushold versions only (74LVTH2245). 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 Parameter (Note 8) TA VCC (V) Min 25qC Typ Max Units Conditions CL 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) 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. www.fairchildsemi.com 4 500: 40qC to 85qC TA Symbol tPLH CL Parameter Propagation Delay Data to B Port Output tPHL Propagation Delay Data to A Port Output tPLH tPHL tPZH Output Enable Time for B Port Output tPZL Output Enable Time for A Port Output tPZH tPZL Output Disable Time for B Port Output tPHZ tPLZ tPHZ Output Disable Time for A Port Output tPLZ tOSHL A Port Output to Output Skew tOSLH (Note 10) tOSHL B Port Output to Output Skew tOSLH (Note 10) 50 pF, RL 500: Units VCC 3.3V r 0.3V Min Max Min Max 1.2 4.4 1.2 5.1 1.2 4.4 1.2 5.1 1.2 3.6 1.2 4.0 1.2 3.5 1.2 4.0 1.3 6.2 1.3 7.3 1.7 6.2 1.7 7.3 1.3 5.5 1.3 7.1 1.7 5.7 1.7 6.7 VCC 2.7V 2.0 5.9 2.0 6.5 2.0 5.4 2.0 5.7 2.0 5.9 2.0 6.5 2.0 5.0 2.0 5.1 1.0 1.0 1.0 1.0 ns ns ns ns ns ns ns 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 0V or VCC 0V or VCC Typical Units 4 pF 8 pF 1 MHz, per MIL-STD-883, Method 3012. 5 www.fairchildsemi.com 74LVT2245 • 74LVTH2245 AC Electrical Characteristics 74LVT2245 • 74LVTH2245 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 6 74LVT2245 • 74LVTH2245 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 7 www.fairchildsemi.com 74LVT2245 • 74LVTH2245 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20 www.fairchildsemi.com 8 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. 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 device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose 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. www.fairchildsemi.com 9 www.fairchildsemi.com 74LVT2245 • 74LVTH2245 Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25: Series Resistors in the B Port Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued)