Revised March 2005 74LCXH2245 Low Voltage Bidirectional Transceiver with Bushold and 26: Series Resistors in B Outputs General Description Features The LCXH2245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus oriented applications. The device is designed for low voltage (2.5V and 3.3V) VCC applications. 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 control inputs The LCXH2245 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. ■ Implements patented noise/EMI reduction circuitry The LCXH2245 data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or floating data inputs at a valid logic level. ■ 2.3V–3.6V VCC specifications provided ■ Bushold on inputs eliminates the need for external pull-up/pull-down resistors ■ 7.0 ns tPD max (VCC 3.3V), 10 PA ICC max ■ Power down high impedance outputs ■ r12 mA output drive B Port (VCC 3.0V) ■ Latch-up performance exceeds 500 mA ■ Equivalent 26: series resistor on B Port outputs ■ ESD performance: Human body model ! 2000V Machine model ! 200V Ordering Code: Order Number Package Number 74LCXH2245WM 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 74LCXH2245SJ Package Description 74LCXH2245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74LCXH2245MTC 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 (Bushold) B0–B7 Side B Inputs or 3-STATE Outputs (Bushold) GTO¥ is a trademark of Fairchild Semiconductor Corporation. © 2005 Fairchild Semiconductor Corporation DS500409 www.fairchildsemi.com 74LCXH2245 Low Voltage Bidirectional Transceiver with Bushold and 26: Series Resistors in B Outputs October 2000 74LCXH2245 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 H HIGH Voltage Level L LOW Voltage Level X Immaterial Z High Impedance Logic Diagram www.fairchildsemi.com 2 Symbol Parameter VCC Supply Voltage VI T/R, OE, Value Conditions Units 0.5 to 7.0 I/O Ports VO DC Output Voltage IIK DC Input Diode Current IOK DC Output Diode Current IO DC Output Source/Sink Current ICC DC Supply Current per Supply Pin IGND DC Ground Current per Ground Pin TSTG Storage Temperature V 0.5 to 7.0 0.5 to VCC 0.5 0.5 to VCC 0.5 50 50 50 r50 r100 r100 65 to 150 V Output in HIGH or LOW State (Note 2) VI GND V mA VO GND mA VO ! VCC mA mA mA qC Recommended Operating Conditions (Note 3) Symbol VCC Parameter VI Input Voltage VO Output Voltage IOH/IOL Min Max Operating 2.0 3.6 Data Retention 1.5 3.6 Supply Voltage 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 0 VCC HIGH or LOW State 0 VCC 3-STATE 0 5.5 VCC 3.0V 3.6V VCC 2.7V - 3.0V VCC 2.3V - 2.7V VCC 3.0V 3.6V VCC 2.7V - 3.0V VCC 2.3V - 2.7V r24 r12 r 8 r12 r 8 r 4 3.0V Units V V V mA mA 40 85 qC 0 10 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: IO Absolute Maximum Rating must be observed. Note 3: Floating or unused control inputs must be HIGH or LOW. DC Electrical Characteristics Symbol VIH VIL VOH VOH Parameter Conditions HIGH Level Input Voltage LOW Level Input Voltage VCC TA (V) Min 2.3 2.7 1.7 2.7 3.6 2.0 40qC to 85qC 0.7 2.7 - 3.6 0.8 HIGH Level Output Voltage IOH 100 PA IOH 8 mA 2.3 1.8 IOH 12 mA 2.7 2.2 IOH 16 mA 3.0 2.4 IOH 24 mA 3.0 2.2 IOH 100 PA 2.3 - 3.6 VCC 0.2 HIGH Level Output Voltage B Outputs 2.3 - 3.6 V VCC 0.2 IOH 4 mA 2.3 1.8 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 3 V 2.3 2.7 A Outputs Units Max V V www.fairchildsemi.com 74LCXH2245 Absolute Maximum Ratings(Note 1) 74LCXH2245 DC Electrical Characteristics Symbol VOL VOL (Continued) Parameter Conditions TA (V) Min LOW Level Output Voltage IOL 100 PA 2.3 3.6 0.2 IOL 8 mA 2.3 0.6 IOL 12 mA 2.7 0.4 IOL 16 mA 3.0 0.4 0.55 IOL 24 mA 3.0 LOW Level Output Voltage IOL 100 PA 2.3 3.6 0.2 B Outputs IOL 4 mA 2.3 0.6 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 2.3 3.6 r5.0 Input Leakage Current VI II(HOLD) Bushold Input Minimum VIN 0.7V Drive Hold Current VCC or GND VIN 1.7V VIN 0.8V VIN 2.0V Bushold Input Over-Drive (Note 5) Current to Change State (Note 6) VI VIH or VIL ICC Quiescent Supply Current VI VCC or GND 'ICC Increase in ICC per Input VIH VCC or GND 3.6V d VI, VO d 5.5V (Note 4) V CC 0.6V PA 75 300 300 PA 450 3.6 (Note 6) V PA 75 2.7 3-STATE I/O Leakage VO 45 3.0 IOZ V 45 2.3 (Note 5) Units Max A Outputs II II(OD) 40qC to 85qC VCC 450 2.3 3.6 r5.0 2.3 3.6 10 2.3 3.6 r10 2.3 - 3.6 500 PA PA PA Note 4: Outputs disabled or 3-STATE only. 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. AC Electrical Characteristics TA Symbol Parameter VCC CL 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) 3.3V r 0.3V 50 pF 40qC to 85qC, RL VCC 2.7V CL 50 pF 500: VCC CL 2.5V r 0.2V Units 30 pF Min Max Min Max Min Max 1.5 8.0 1.5 9.0 1.5 9.6 ns 1.5 7.0 1.5 8.0 1.5 8.4 ns 1.5 9.5 1.5 10.5 1.5 11.0 ns 1.5 8.5 1.5 9.5 1.5 10.5 ns 1.5 7.5 1.5 8.5 1.5 9.0 ns 1.5 7.5 1.5 8.5 1.5 9.0 ns 1.0 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 VOLV Parameter VCC (V) Conditions 2.5 25qC TA Typical Quiet Output Dynamic Peak VOL CL 30 pF, VIH 2.5V, VIL 0V 0.6 B to A CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.8 Quiet Output Dynamic Peak VOL CL 30 pF, VIH 2.5V, VIL 0V 2.5 0.4 A to B CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.5 Quiet Output Dynamic Valley VOL CL 30 pF, VIH 2.5V, V IL 0V 2.5 0.6 B to A CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.8 Quiet Output Dynamic Valley VOL CL 30 pF, VIH 2.5V, V IL 0V 2.5 0.4 A to B CL 50 pF, VIH 3.3V, VIL 0V 3.3 0.5 Units V V 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 74LCXH2245 Dynamic Switching Characteristics 74LCXH2245 AC LOADING and WAVEFORMS Generic for LCX Family FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance) Test Switch tPLH, tPHL Open tPZL, tPLZ 6V at VCC 3.3 r 0.3V; and 2.7V VCC x 2 at VCC 2.5 r 0.2V tPZH, tPHZ GND 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) Symbol www.fairchildsemi.com VCC 3.3V r 0.3V 2.7V 2.5V r 0.2V Vmi 1.5V 1.5V VCC/2 Vmo 1.5V 1.5V VCC/2 Vx VOL 0.3V VOL 0.3V VOL 0.15V Vy VOH 0.3V VOH 0.3V VOH 0.15V 6 74LCXH2245 Schematic Diagram Generic for LCXH Family (with Bushold) 7 www.fairchildsemi.com 74LCXH2245 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 74LCXH2245 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 74LCXH2245 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 74LCXH2245 Low Voltage Bidirectional Transceiver with Bushold and 26: Series Resistors in B Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued)