74LCX245 Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Features General Description ■ 5V tolerant inputs and outputs The LCX245 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 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. ■ 2.3V to 3.6V VCC specifications provided ■ 7.0ns tPD max. (VCC = 3.3V), 10µA ICC max. ■ Power down high impedance inputs and outputs ■ Supports live insertion/withdrawal(1) ■ ±24mA output drive (VCC = 3.0V) ■ Implements proprietary noise/EMI reduction circuitry ■ Latch-up performance exceeds 500mA ■ ESD performance: – Human body model > 2000V – Machine model > 200V ■ Leadless DQFN package The LCX245 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation. 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 Information Package Number Package Description 74LCX245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74LCX245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Order Number 74LCX245BQX(2) MLP20B 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm 74LCX245MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74LCX245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Note: 2. DQFN package available in Tape and Reel only. Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number. All packages are lead free per JEDEC: J-STD-020B standard. ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs February 2008 Logic Symbol Pin Assignments for SOIC, SOP, SSOP, and TSSOP Truth Table Inputs Pin Assignment for DQFN OE T/R Outputs 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(3) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Note: 3. Unused bus terminals during HIGH Z State must be held HIGH or LOW. Logic Diagram (Top Through View) Pin Description 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 ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 2 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Connection Diagrams Symbol VCC Parameter Rating Supply Voltage –0.5V to +7.0V VI DC Input Voltage –0.5V to +7.0V VO DC Output Voltage Output in 3-STATE –0.5V to +7.0V Output in HIGH or LOW State(4) IIK DC Input Diode Current, VI < GND IOK DC Output Diode Current –0.5V to VCC + 0.5V –50mA VO < GND –50mA VO > VCC +50mA IO DC Output Source/Sink Current ±50mA ICC DC Supply Current per Supply Pin ±100mA IGND DC Ground Current per Ground Pin ±100mA TSTG Storage Temperature –65°C to +150°C Note: 4. IO Absolute Maximum Rating must be observed. Recommended Operating Conditions(5) The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings. Symbol VCC Parameter Min. Max. Units Operating 2.0 3.6 V Data Retention 1.5 3.6 0 5.5 V V Supply Voltage VI Input Voltage VO Output Voltage IOH / IOL TA ∆t / ∆V 3-STATE 0 5.5 HIGH or LOW State 0 VCC Output Current VCC = 3.0V–3.6V ±24 VCC = 2.7V–3.0V ±12 VCC = 2.3V–2.7V ±8 Free-Air Operating Temperature Input Edge Rate, VIN = 0.8V–2.0V, VCC = 3.0V mA –40 85 °C 0 10 ns / V Note: 5. Unused inputs must be held HIGH or LOW. They may not float. ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 3 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. TA = –40°C to +85°C Symbol VIH VIL VOH VOL Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Voltage VCC (V) Conditions Min. 2.3–2.7 1.7 2.7–3.6 2.0 Max. V 2.3–2.7 0.7 2.7–3.6 0.8 2.3–3.6 IOH = –100µA V VCC – 0.2 2.3 IOH = –8mA 1.8 2.7 IOH = –12mA 2.2 3.0 IOH = –18mA 2.4 IOH = –24mA 2.2 V IOL = 100µA 0.2 2.3 IOL = 8mA 0.6 2.7 IOL = 12mA 0.4 3.0 IOL = 16mA 0.4 IOL = 24mA 0.55 2.3–3.6 Units V Input Leakage Current 2.3–3.6 0 ≤ VI ≤ 5.5V ±5.0 µA IOZ 3-STATE Output Leakage 2.3–3.6 0 ≤ VO ≤ 5.5V, VI = VIH or VIL ±5.0 µA IOFF Power-Off Leakage Current 0 VI or VO = 5.5V 10 µA ICC Quiescent Supply Current µA II ∆ICC Increase in ICC per Input 2.3–3.6 2.3–3.6 VI = VCC or GND 10 3.6V ≤ VI, VO ≤ 5.5V(6) ±10 VIH = VCC – 0.6V 500 µA Note: 6. Outputs disabled or 3-STATE only. AC Electrical Characteristics TA = –40°C to +85°C, RL = 500Ω VCC = 3.3V ± 0.3V, CL = 50pF Symbol Parameter tPHL, tPLH VCC = 2.7V, CL = 50pF VCC = 2.5V ± 0.2V, CL = 30pF Min. Max. Min. Max. Min. Max. Units Propagation Delay, An to Bn or Bn to An 1.5 7.0 1.5 8.0 1.5 8.4 ns tPZL, tPZH Output Enable Time 1.5 8.5 1.5 9.5 1.5 10.5 ns tPLZ, tPHZ Output Disable Time 1.5 7.5 1.5 8.5 1.5 9.0 ns tOSHL, tOSLH Output to Output Skew(7) 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). ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 4 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs DC Electrical Characteristics TA = 25°C Symbol Parameter VCC (V) VOLP Quiet Output Dynamic Peak VOL 3.3 VOLV Quiet Output Dynamic Valley VOL Conditions Typical Unit CL = 50pF, VIH = 3.3V, VIL = 0V 0.8 V 2.5 CL = 30pF, VIH = 2.5V, VIL = 0V 0.6 3.3 CL = 50pF, VIH = 3.3V, VIL = 0V –0.8 2.5 CL = 30pF, VIH = 2.5V, VIL = 0V –0.6 V Capacitance Symbol Parameter Conditions Typical Units Input Capacitance VCC = Open, VI = 0V or VCC 7.0 pF COUT Output Capacitance VCC = 3.3V, VI = 0V or VCC 8.0 pF CPD Power Dissipation Capacitance VCC = 3.3V, VI = 0V or VCC, f = 10MHz 25.0 pF CIN ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 5 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Dynamic Switching Characteristics Test Switch tPLH, tPHL Open tPZL, tPLZ 6V at VCC = 3.3 ± 0.3V VCC x 2 at VCC = 2.5 ± 0.2V tPZH, tPHZ GND Figure 1. AC Test Circuit (CL includes probe and jig capacitance) 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 3-STATE Output Low Enable and Disable Times for Logic trise and tfall VCC Symbol 3.3V ± 0.3V 2.7V 2.5V ± 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 Figure 2. Waveforms (Input Characteristics; f = 1MHz, tr = tf = 3ns) ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 6 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs AC Loading and Waveforms (Generic for LCX Family) 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Schematic Diagram (Generic for LCX Family) ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 7 Tape Format for DQFN Package Designator Tape Section Number of Cavities Cavity Status Cover Tape Status BQX Leader (Start End) 125 (typ.) Empty Sealed Carrier 3000 Filled Sealed Trailer (Hub End) 75 (typ.) Empty Sealed Tape Dimension inches (millimeters) Reel Dimensions inches (millimeters) Tape Size A B 12mm 13.0 (330.0) 0.059 (1.50) ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 C D N 0.512 (13.00) 0.795 (20.20) 2.165 (55.00) W1 W2 0.488 (12.4) 0.724 (18.4) www.fairchildsemi.com 8 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Tape and Reel Specification 13.00 12.60 A 11.43 20 11 B 9.50 10.65 7.60 10.00 7.40 2.25 1 10 0.51 0.35 PIN ONE INDICATOR 0.25 M 0.65 1.27 1.27 C B A LAND PATTERN RECOMMENDATION 2.65 MAX SEE DETAIL A 0.33 0.20 C 0.75 0.25 X 45° SEATING PLANE NOTES: UNLESS OTHERWISE SPECIFIED (R0.10) GAGE PLANE (R0.10) 0.10 C 0.30 0.10 0.25 8° 0° A) THIS PACKAGE CONFORMS TO JEDEC MS-013, VARIATION AC, ISSUE E B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) CONFORMS TO ASME Y14.5M-1994 1.27 0.40 SEATING PLANE E) LANDPATTERN STANDARD: SOIC127P1030X265-20L (1.40) DETAIL A F) DRAWING FILENAME: MKT-M20BREV3 SCALE: 2:1 Figure 3. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 9 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Physical Dimensions 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Physical Dimensions (Continued) Figure 4. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 10 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Physical Dimensions (Continued) Figure 5. 20-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 4.5mm Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 11 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Physical Dimensions (Continued) Figure 6. 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 12 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs Physical Dimensions (Continued) Figure 8. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 13 ACEx® Build it Now™ CorePLUS™ CROSSVOLT™ CTL™ Current Transfer Logic™ EcoSPARK® EZSWITCH™ * ™ PDP-SPM™ Power220® POWEREDGE® Power-SPM™ PowerTrench® Programmable Active Droop™ QFET® QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ SMART START™ SPM® STEALTH™ SuperFET™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 FPS™ FRFET® Global Power ResourceSM Green FPS™ Green FPS™e-Series™ GTO™ i-Lo™ IntelliMAX™ ISOPLANAR™ MegaBuck™ MICROCOUPLER™ MicroFET™ MicroPak™ MillerDrive™ Motion-SPM™ OPTOLOGIC® OPTOPLANAR® ® Fairchild® Fairchild Semiconductor® FACT Quiet Series™ FACT® FAST® FastvCore™ FlashWriter® * ® SupreMOS™ SyncFET™ ® The Power Franchise® TinyBoost™ TinyBuck™ TinyLogic® TINYOPTO™ TinyPower™ TinyPWM™ TinyWire™ µSerDes™ UHC® Ultra FRFET™ UniFET™ VCX™ * EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. 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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 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 of the user. 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. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve the design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. Rev. I33 ©1994 Fairchild Semiconductor Corporation 74LCX245 Rev. 1.11.0 www.fairchildsemi.com 14 74LCX245 — Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks.