74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Features General Description ■ Bidirectional non-inverting buffers The ABT245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for busoriented applications. Current sinking capability is 64 mA on both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active HIGH) 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 Z condition. ■ A and B output sink capability of 64mA, source capability of 32mA ■ Guaranteed output skew ■ Guaranteed multiple output switching specifications ■ Output switching specified for both 50pF and 250pF loads ■ Guaranteed simultaneous switching, noise level and ■ ■ ■ ■ dynamic threshold performance Guaranteed latchup protection High-impedance, glitch-free bus loading during entire power up and power down cycle Nondestructive, hot-insertion capability Disable time is less than enable time to avoid bus contention tm Ordering Information Order Number Package Number Package Description 74ABT245CSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74ABT245CSJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ABT245CMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide 74ABT245CMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74ABT245CMTCX_NL(1) MTC20 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 number. Pb-Free package per JEDEC J-STD-020B. Note: 1. Device available in Tape and Reel only. ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs March 2007 Logic Symbol Truth Table Inputs Pin Descriptions Pin Names OE T/R Output 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 Description OE Output Enable Input (Active LOW) L = LOW Voltage Level T/R Transmit/Receive Input X = Immaterial A0–A7 Side A Inputs or 3-STATE Outputs B0–B7 Side B Inputs or 3-STATE Outputs Logic Diagram ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 2 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Connection Diagram 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. Symbol TSTG Parameter Rating Storage Temperature –65°C to +150°C TA Ambient Temperature Under Bias –55°C to +125°C TJ Junction Temperature Under Bias –55°C to +150°C VCC VCC Pin Potential to Ground Pin –0.5V to +7.0V VIN Input Voltage(2) –0.5V to +7.0V IIN Input Current(2) –30mA to +5.0mA VO Voltage Applied to Any Output Disabled or Power-off State –0.5V to 5.5V HIGH State –0.5V to VCC Current Applied to Output in LOW State twice the rated IOL (mA) DC Latchup Source Current –500mA Over Voltage Latchup (I/O) 10V Note: 2. Either voltage limit or current limit is sufficient to protect inputs. Recommended Operating Conditions 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 TA VCC ∆V / ∆t Parameter Rating Free Air Ambient Temperature –40°C to +85°C Supply Voltage +4.5V to +5.5V Minimum Input Edge Rate Data Input 50mV/ns Enable Input 20mV/ns ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 3 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Absolute Maximum Ratings Symbol Parameter VIH Input HIGH Voltage VCC Conditions Recognized HIGH Signal Min. Typ. Max. 2.0 Units V VIL Input LOW Voltage Recognized LOW Signal 0.8 V VCD Input Clamp Diode Voltage Min. IIN = –18 mA (OE, T/R) –1.2 V VOH Output HIGH Voltage Min. IOH = –3 mA (An, Bn) 2.5 Min. IOH = –32 mA (An, Bn) 2.0 V VOL Output LOW Voltage Min. IOL = 64 mA (An, Bn) 0.55 V IIH Input HIGH Current Max. VIN = 2.7V (OE, T/R) 1 µA VIN = VCC (OE, T/R) 1 7 µA IBVI Input HIGH Current Breakdown Test Max. VIN = 7.0V (OE, T/R) IBVIT Input HIGH Current Breakdown Test (I/O) Max. VIN = 5.5V (An, Bn) 100 µA IIL Input LOW Current Max. VIN = 0.5V (OE, T/R) –1 µA VID Input Leakage Test 0.0 VIN = 0.0V (OE, T/R) IID = 1.9 µA (OE, T/R), All Other Pins Grounded –1 4.75 V IIH + IOZH Output Leakage Current 0–5.5V VOUT = 2.7V (An, Bn), OE = 2.0V 10 µA IIL + I OZL Output Leakage Current 0–5.5V VOUT = 0.5V (An, Bn), OE = 2.0V –10 µA –275 mA IOS Output Short-Circuit Current Max. VOUT = 0.0V (An, Bn) ICEX Output HIGH Leakage Current Max. VOUT = V CC (An, Bn) 50 µA 0.0 VOUT = 5.5V (An, Bn), All Others GND 100 µA IZZ Bus Drainage Test –100 ICCH Power Supply Current Max. All Outputs HIGH 50 µA ICCL Power Supply Current Max. All Outputs LOW 30 mA ICCZ Power Supply Current Max. OE = VCC, T/R = GND or VCC, All Other GND or VCC 50 µA ICCT Additional ICC/Input Max. VI = V CC – 2.1V 2.5 mA Outputs 3-STATE OE, T/R VI = VCC – 2.1V 2.5 mA Outputs 3-STATE Data Input VI = VCC – 2.1V, All Others at VCC or GND. 50 µA Outputs Open, OE = GND, T/R = GND or VCC, One Bit Toggling, 50% Duty Cycle 0.1 mA/ MHz ICCD Outputs Enabled Dynamic ICC No Load ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 Max. www.fairchildsemi.com 4 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs DC Electrical Characteristics SOIC package. Symbol VOLP VOLV Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL VCC Conditions CL = 50 pF, RL = 500Ω 5.0 TA = 25°C(3) TA = 25°C(3) –1.3 –1.0 V 25°C(5) 2.7 3.1 V 2.0 1.7 V 5.0 VOHV Minimum HIGH Level Dynamic Output Voltage 5.0 TA = VIHD Minimum HIGH Level Dynamic Input Voltage 5.0 TA = 25°C(4) VILD Maximum LOW Level Dynamic Input Voltage 5.0 TA = 25°C(4) Min. Typ. Max. Units 0.7 1.0 V 0.9 0.6 V Notes: 3. Max number of outputs defined as (n). n-1 data inputs are driven 0V to 3V. One output at LOW. Guaranteed, but not tested. 4. Max number of data inputs (n) switching. n-1 inputs switching 0V to 3V. Input-under-test switching: 3V to threshold (VILD), 0V to threshold (VIHD). Guaranteed, but not tested. 5. Max number of outputs defined as (n). n – 1 data inputs are driven 0V to 3V. One output HIGH. Guaranteed, but not tested. AC Electrical Characteristics SOIC and SSOP package. TA = +25°C, VCC = +5V, CL = 50pF Symbol tPLH tPHL tPZH Parameter TA = –40°C to +85°C, VCC = 4.5V to 5.5V, CL = 50pF Min. Typ. Max. Min. Max. Min. Max. Units Propagation Delay, Data to Outputs 1.0 2.1 3.6 1.0 4.8 1.0 3.6 ns 1.0 2.4 3.6 1.0 4.8 1.0 3.6 Output Enable Time 1.5 3.2 6.0 1.0 6.7 1.5 6.0 1.5 3.7 6.0 2.0 7.5 1.5 6.0 Output Disable Time 1.0 3.6 6.1 1.7 7.4 1.0 6.1 1.0 3.3 5.6 1.7 6.5 1.0 5.6 tPZL tPHZ TA = –55°C to +125°C, VCC = 4.5V to 5.5V, CL = 50pF tPLZ ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 ns ns www.fairchildsemi.com 5 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs DC Electrical Characteristics SOIC package. TA = –40°C to +85°C, TA = –40°C to +85°C, TA = –40°C to +85°C, VCC = 4.5V to 5.5V, VCC = 4.5V to 5.5V, VCC = 4.5V to 5.5V, CL = 50pF, CL = 250pF, CL = 250pF, 8 Outputs Switching(6) 1 Output Switching(7) 8 Outputs Switching(8) Symbol Parameter Min. fTOGGLE Max Toggle Frequency Typ. Max. Min. Max. Min. Max. 100 MHz tPLH Propagation Delay 1.5 5.0 1.5 6.0 2.5 8.5 tPHL Data to Outputs 1.5 5.0 1.5 6.0 2.5 8.5 tPZH Output Enable Time 1.5 6.5 2.5 7.5 2.5 9.5 1.5 6.5 2.5 7.5 2.5 tPZL tPHZ tPLZ Output Disable Time Units 1.0 6.5 1.0 5.6 (9) ns ns 11.0 (9) ns Notes: 6. This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.). 7. This specification is guaranteed but not tested. The limits represent propagation delay with 250pF load capacitors in place of the 50pF load capacitors in the standard AC load. This specification pertains to single output switching only. 8. This specification is guaranteed but not tested. The limits represent propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.) with 250pF load capacitors in place of the 50pF load capacitors in the standard AC load. 9. The 3-STATE delays are dominated by the RC network (500Ω, 250pF) on the output and have been excluded from the datasheet. ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 6 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Extended AC Electrical Characteristics SOIC package. Symbol TA = –40°C to +85°C, VCC = 4.5V to 5.5V, CL = 50pF, 8 Outputs Switching(12) TA = –40°C to +85°C, VCC = 4.5V to 5.5V, CL = 250pF, 8 Outputs Switching(13) Max. Max. Units Parameter tOSHL (10) Pin to Pin Skew, HL Transitions 1.3 2.3 ns tOSLH (10) Pin to Pin Skew, LH Transitions 1.0 1.8 ns Duty Cycle, LH–HL Skew 2.0 3.5 ns Pin to Pin Skew, LH/HL Transitions 2.0 3.5 ns Device to Device Skew, LH/HL Transitions 2.0 3.5 ns tPS (14) tOST(10) tPV (11) Notes: 10. Skew is defined as the absolute value of the difference between the actual propagation delays for any two separate outputs of the same device. The specification applies to any outputs switching HIGH-to-LOW (tOSHL), LOW-to-HIGH (tOSLH), or any combination switching LOW-to-HIGH and/or HIGH-to-LOW (tOST). The specification is guaranteed but not tested. 11. Propagation delay variation for a given set of conditions (i.e., temperature and VCC) from device to device. This specification is guaranteed but not tested. 12. This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.) 13. These specifications guaranteed but not tested. The limits represent propagation delays with 250pF load capacitors in place of the 50pF load capacitors in the standard AC load. 14. This describes the difference between the delay of the LOW-to-HIGH and the HIGH-to-LOW transition on the same pin. It is measured across all the outputs (drivers) on the same chip, the worst (largest delta) number is the guaranteed specification. This specification is guaranteed but not tested. Capacitance Symbol CIN CI/O (15) Conditions TA = 25°C Parameter Typ. Units Input Capacitance VCC = 0V (OE, T/R) 5.0 pF I/O Capacitance VCC = 5.0V (An, Bn) 11.0 pF Note: 15. CI/O is measured at frequency f = 1 MHz, per MIL-STD-883, Method 3012. ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 7 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Skew *Includes jig and probe capacitance Figure 1. Standard AC Test Load Figure 2. Test Input Signal Levels Amplitude Rep. Rate tW tr tf 3.0V 1MHz 500ns 2.5ns 2.5ns Figure 3. Test Input Signal Requirements AC Waveforms Figure 4. Propagation Delay Waveforms for Inverting and Non-Inverting Functions Figure 6. 3-STATE Output HIGH and LOW Enable and Disable Times Figure 5. Propagation Delay, Pulse Width Waveforms Figure 7. Setup Time, Hold Time and Recovery Time Waveforms ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 8 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs AC Loading Dimensions are in inches (millimeters) unless otherwise noted. Figure 8. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 9 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Physical Dimensions 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 9. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 10 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 10. 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide Package Number MSA20 ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 11 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 11. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 12 ® ACEx Across the board. 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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 Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Definition 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 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. I24 ©1991 Fairchild Semiconductor Corporation 74ABT245 Rev. 1.4 www.fairchildsemi.com 13 74ABT245 Octal Bi-Directional Transceiver with 3-STATE Outputs TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.