October 2000 Revised March 2005 74LCXR2245 Voltage Bidirectional
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74LCXR2245 Voltage Bidirectional Transceiver with Tolerant Inputs Outputs Series Resistors Both Ports
October 2000 Revised March 2005
74LCXR2245 Voltage Bidirectional Transceiver with Tolerant Inputs Outputs Series Resistors Both Ports
LCXR2245 contains eight non-inverting bidirectional buffers with 3-STATE outputs intended oriented applications. device designed voltage (2.5V 3.3V) applications with capability interfacing signal environment. input determines direction data flow through device. input disables both ports placing them high impedance state. series resistor helps reduce output overshoot undershoot. LCXR2245 fabricated with advanced CMOS technology achieve high speed operation while maintaining CMOS power dissipation.
Features
tolerant inputs outputs 2.3V-3.6V specifications provided (VCC
3.3V),
Power down high impedance inputs outputs Supports live insertion/withdrawal (Note output drive (VCC
3.0V)
Implements patented noise/EMI reduction circuitry Latch-up performance exceeds Equivalent series resistor outputs performance:
Human body model 2000V Machine model 200V
Note ensure high-impedance state during power down, should tied through pull-up resistor: minimum value resistor determined current-sourcing capability driver.
Ordering Code:
Order Number 74LCXR2245WM 74LCXR2245SJ 74LCXR2245MSA 74LCXR2245MTC 74LCXR2245MTCX_NL (Note Package Number M20B M20D MSA20 MTC20 MTC20 Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE 5.3mm Wide 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 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available Tape Reel. Specify appending suffix letter ordering code. Pb-Free package JEDEC J-STD-020B> Note "_NL" indicates Pb-Free package (per JEDEC J-STD-020B). Device available Tape Reel only.
2005 Fairchild Semiconductor Corporation
DS500361
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74LCXR2245
Logic Symbol
Connection Diagram
Descriptions
Names A0-A7 B0-B7 Description Output Enable Input Transmit/Receive Input Side Inputs 3-STATE Outputs Side Inputs 3-STATE Outputs
Truth Table
Inputs
HIGH Voltage Level Voltage Level Immaterial High Impedance Note Unused terminals during HIGH State must held HIGH LOW.
Outputs
Data Data HIGH State (Note
Logic Diagram
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74LCXR2245
Absolute Maximum Ratings(Note
Symbol IGND TSTG Parameter Supply Voltage Input Voltage Output Voltage Input Diode Current Output Diode Current Output Source/Sink Current Supply Current Supply Ground Current Ground Storage Temperature Value Conditions Units Output 3-STATE Output HIGH State (Note
r100 r100
Recommended Operating Conditions (Note
Symbol IOH/IOL Supply Voltage Input Voltage Output Voltage Output Current HIGH State 3-STATE Free-Air Operating Temperature Input Edge Rate, 0.8V 2.0V, 3.0V 3.0V 3.6V 2.7V 3.0V 2.3V 2.7V Parameter Operating Data Retention Units
ns/V
't/'V
Note Absolute Maximum Ratings those values beyond which safety device cannot guaranteed. device should operated these limits. parametric values defined Electrical Characteristics tables guaranteed Absolute Maximum Ratings. "Recommended Operating Conditions" table will define conditions actual device operation. Note Absolute Maximum Rating must observed. Note Unused inputs pins must held HIGH LOW. They float.
Electrical Characteristics
Symbol Parameter HIGH Level Input Voltage Level Input Voltage HIGH Level Output Voltage Level Output Voltage Input Leakage Current 3-STATE Leakage Conditions 0.55
40qC 85qC
Units
5.5V 5.5V
r5.0 r5.0
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74LCXR2245
Electrical Characteristics
Symbol IOFF Parameter Power-Off Leakage Current Quiescent Supply Current Increase Input
(Continued)
Conditions 5.5V
40qC 85qC
Units
0.6V
3.6V 5.5V (Note
'ICC
Note Outputs disabled 3-STATE only.
Electrical Characteristics
Symbol Parameter tPHL tPLH tPZL tPZH tPLZ tPHZ tOSHL tOSLH Output Output Skew (Note Output Disable Time Propagation Delay Output Enable Time 3.3V 0.3V
40qC 85qC,
2.7V 10.5 10.5
500: 2.5V 0.2V 11.0 11.0 Units
Note Skew defined absolute value difference between actual propagation delay separate outputs same device. specification applies outputs switching same direction, either HIGH-to-LOW (tOSHL) LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol VOLP VOLV Parameter Quiet Output Dynamic Peak Quiet Output Dynamic Valley Conditions 3.3V, 2.5V, 3.3V, 2.5V, 25qC Units Typical
Capacitance
Symbol CI/O Parameter Input Capacitance Input/Output Capacitance Power Dissipation Capacitance Open, 3.3V, 3.3V, Conditions VCC, Typical Units
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74LCXR2245
LOADING WAVEFORMS Generic Family
FIGURE Test Circuit includes probe capacitance) Test tPLH, tPHL tPZL, tPLZ tPZH,tPHZ Switch Open 0.3V 0.2V
Waveform Inverting Non-Inverting Functions
3-STATE Output High Enable Disable Times Logic
Propagation Delay. Pulse Width trec Waveforms
Setup Time, Hold Time Recovery Time Logic
3-STATE Output Enable Disable Times Logic FIGURE Waveforms (Input Characteristics; =1MHz, 3ns) Symbol 3.3V 0.3V 1.5V 1.5V 0.3V 0.3V 1.5V 1.5V 0.3V 0.3V 2.7V
trise tfall
2.5V 0.2V VCC/2 VCC/2 0.15V 0.15V
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74LCXR2245
Schematic Diagram Generic Family
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74LCXR2245
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B
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74LCXR2245
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE 5.3mm Wide Package Number M20D
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74LCXR2245
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20
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74LCXR2245 Voltage Bidirectional Transceiver with Tolerant Inputs Outputs Series Resistors Both Ports
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 assume responsibility circuitry described, circuit patent licenses implied Fairchild reserves right time without notice change said circuitry specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT FAIRCHILD SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. www.fairchildsemi.com critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness. www.fairchildsemi.com
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