Revised March 2005 74LCXZ2245 Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26: Series Resistors in B Outputs General Description Features The LCXZ2245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus oriented applications. The device is designed for low voltage (2.7V and 3.3V) VCC applications with capability of interfacing to a 5V signal environment. The T/R input determines the direction of data flow through the device. The OE input disables both the A and B ports by placing them in a high impedance state. The 26: series resistor in the B Port output helps reduce output overshoot and undershoot. ■ 5V tolerant inputs and outputs The LCXZ2245 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. When VCC is between 0 and 1.5V, the LCXZ2245 is on the high impedance state during power up or power down. This places the outputs in the high impedance (Z) state preventing intermittent low impedance loading or glitching in bus oriented applications. ■ Latch-up performance exceeds 500 mA ■ 2.7V–3.6V VCC specifications provided ■ 7.0 ns tPD max (VCC 3.3V), 10 PA ICC max ■ Power down high impedance inputs and outputs ■ Supports live insertion/withdrawal (Note 1) ■ r12 mA output drive on the B Port (VCC 3.0V) ■ Implements patented noise/EMI reduction circuitry ■ Equivalent 26: series resistor on all B Port outputs ■ ESD performance: Human body model ! 2000V Machine model ! 200V Note 1: To ensure the high-impedance state during power up or down, OE should be tied to VCC through a pull-up resistor: the minimum value or the resistor is determined by the current-sourcing capability of the driver. Ordering Code: Order Number Package Number 74LCXZ2245WM 74LCXZ2245SJ Package Description M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74LCXZ2245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74LCXZ2245MTC MTC20 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. Pb-Free package per JEDEC J-STD-020B. Logic Symbol Connection Diagram Pin Descriptions 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 © 2005 Fairchild Semiconductor Corporation DS500410 www.fairchildsemi.com 74LCXZ2245 Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26: Series Resistors in B Outputs October 2000 74LCXZ2245 Truth Table Inputs Outputs OE T/R L L Bus B0 – B7 Data to Bus A0 – A7 L H Bus A0 – A7 Data to Bus B0 – B7 H X HIGH Z State on A0 – A7, B0 – B7 (Note 2) H HIGH Voltage Level L LOW Voltage Level X Immaterial Z High Impedance Note 2: Unused bus terminals during HIGH Z State must be held HIGH or LOW. Logic Diagram www.fairchildsemi.com 2 Symbol Parameter VCC Supply Voltage VI DC Input Voltage VO DC Output Voltage IIK DC Input Diode Current IOK DC Output Diode Current Value IO DC Output Source/Sink Current ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature Conditions 0.5 to 7.0 0.5 to 7.0 0.5 to 7.0 0.5 to VCC 0.5 50 50 50 r50 r100 r100 65 to 150 Units V V Output in 3-STATE Output in HIGH or LOW State (Note 4) VI GND V mA VO GND mA VO ! VCC mA mA mA qC Recommended Operating Conditions (Note 5) Symbol Parameter VCC Supply Voltage VI Input Voltage VO Output Voltage IOH/IOL Min Max 2.7 3.6 V 0 5.5 V HIGH or LOW State 0 VCC 3-STATE 0 5.5 Operating Output Current in IOH/IOL - A Outputs Output Current in IOH/IOL - B Outputs TA Free-Air Operating Temperature 't/'V Input Edge Rate, VIN 0.8V 2.0V, VCC VCC 3.0V 3.6V VCC 2.7V 3.0V VCC 3.0V 3.6V VCC 2.7V 3.0V r24 r12 r12 r8 Units V mA mA 40 85 qC 0 10 ns/V 3.0V Note 3: 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 4: IO Absolute Maximum Rating must be observed. Note 5: Unused inputs or I/O pins must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol Parameter Conditions VCC TA (V) Min 2.0 VIH HIGH Level Input Voltage 2.7 - 3.6 VIL LOW Level Input Voltage 2.7 - 3.6 VOH 40qC to 85qC HIGH Level Output Voltage IOH 100 PA 2.7 - 3.6 VCC 0.2 IOH 4 mA 2.7 2.2 IOH 6 mA 3.0 2.4 IOH 8 mA 2.7 2.0 IOH 12 mA 3.0 2.0 IOH 100 PA 2.7 - 3.6 VCC 0.2 A Outputs IOH 12 mA 2.7 2.2 IOH 18 mA 3.0 2.4 IOH 24 mA 3.0 2.2 3 Units V 0.8 B Outputs HIGH Level Output Voltage Max V V www.fairchildsemi.com 74LCXZ2245 Absolute Maximum Ratings(Note 3) 74LCXZ2245 DC Electrical Characteristics Symbol VOL Parameter (Continued) Conditions Min 40qC to 85qC IOL 100 PA IOL 4 mA 2.7 0.4 IOL 6 mA 3.0 0.55 IOL 8 mA 2.7 0.6 IOL 12 mA 3.0 0.8 IOL 100 PA 2.7 - 3.6 0.2 0.4 2.7 - 3.6 0.2 V IOL 12 mA 2.7 IOL 16 mA 3.0 0.4 IOL 24 mA 3.0 0.55 2.7 - 3.6 r5.0 PA 2.7 - 3.6 r5.0 PA 0 10 PA 0 - 1.5 r5.0 PA II Input Leakage Current 0 d VI d 5.5V IOZ 3-STATE I/O Leakage 0 d VO d 5.5V IOFF Power-Off Leakage Current VI or VO IPU/PD Power Up/Down VO 0.5V to VCC 3-STATE Output Current VI VCC or GND Quiescent Supply Current VI VCC or GND VI VIH or VIL 5.5V 3.6V d VI, VO d 5.5V (Note 6) Increase in ICC per Input Units Max LOW Level Output Voltage A Outputs 'ICC TA (V) B Outputs LOW Level Output Voltage ICC VCC VIH VCC 0.6V 2.7 - 3.6 225 2.7 - 3.6 r225 2.7 - 3.6 500 PA PA Note 6: Outputs disabled or 3-STATE only. AC Electrical Characteristics TA Symbol VCC Parameter tPHL Propagation Delay tPLH A to B tPHL Propagation Delay tPLH B to A tPZL Output Enable Time tPZH A to B tPZL Output Enable Time tPZH B to A tPLZ Output Disable Time tPHZ A to B tPLZ Output Disable Time tPHZ B to A tOSHL Output to Output Skew tOSLH (Note 7) CL 40qC to 85qC, RL 3.3V r 0.3V 50 pF 500: VCC 2.7V CL 50 pF Units Min Max Min Max 1.5 8.0 1.5 9.0 1.5 7.0 1.5 8.0 1.5 9.5 1.5 10.5 ns 1.5 8.5 1.5 9.5 ns 1.5 7.5 1.5 8.5 ns 1.5 7.5 1.5 8.5 ns 1.0 ns ns Note 7: 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). www.fairchildsemi.com 4 Symbol VOLP Parameter Quiet Output Dynamic Peak VOL B to A Quiet Output Dynamic Peak VOL A to B VOLV Quiet Output Dynamic Valley VOL B to A Quiet Output Dynamic Valley VOL A to B VCC (V) Conditions 25qC TA Typical CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.8 CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.5 CL 50 pF, VIH 3.3V, VIL 0V 2.5 0.8 CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.5 Units V V Capacitance Symbol Parameter Conditions CIN Input Capacitance VCC Open, VI CI/O Input/Output Capacitance VCC 3.3V, VI 0V or VCC CPD Power Dissipation Capacitance VCC 3.3V, VI 0V or VCC, f 5 0V or VCC 10 MHz Typical Units 7 pF 8 pF 25 pF www.fairchildsemi.com 74LCXZ2245 Dynamic Switching Characteristics 74LCXZ2245 AC LOADING and WAVEFORMS Generic for LCX Family FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance) CL VI 6V for VCC 3.3V, 2.7V 50 pF Waveform for Inverting and Non-Inverting Functions 3-STATE Output High Enable and Disable Times for Logic Propagation Delay. Pulse Width and trec Waveforms Setup Time, Hold Time and Recovery Time for Logic trise and tfall 3-STATE Output Low Enable and Disable Times for Logic FIGURE 2. Waveforms (Input Characteristics; f =1MHz, tR = tF = 3ns) VCC Symbol www.fairchildsemi.com 3.3V r 0.3V 2.7V Vmi 1.5V 1.5V Vmo 1.5V 1.5V Vx VOL 0.3V VOL 0.3V Vy VOH 0.3V VOH 0.3V 6 74LCXZ2245 Schematic Diagram Generic for LCX Family 7 www.fairchildsemi.com 74LCXZ2245 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 8 74LCXZ2245 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 9 www.fairchildsemi.com 74LCXZ2245 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 10 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 11 www.fairchildsemi.com 74LCXZ2245 Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs and 26: Series Resistors in B Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued)