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This literature is subject to all applicable copyright laws and is not for resale in any manner. 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs tm Features General Description High Speed: tPD = 5.9ns (Typ.) at VCC = 5V Power down protection is provided on inputs and The VHCT244A is an advanced high speed CMOS octal bus transceiver fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The VHCT244A is a noninverting 3-STATE buffer having two active-LOW output enables. This device is designed to be used as 3-STATE memory address drivers, clock drivers, and bus oriented transmitter/receivers. outputs Low power dissipation: ICC = 4A (Max.) @ TA = 25C Pin and function compatible with 74HCT244 Protection circuits ensure that 0V to 7V can be applied to the input and output(1) pins without regard to the supply voltage. These circuits prevent device destruction due to mismatched supply and input/output voltages. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. Note: 1. Outputs in OFF-State Ordering Information Order Number Package Number Package Description 74VHCT244AM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74VHCT244ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHCT244AMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter "X" to the ordering number. Pb-Free package per JEDEC J-STD-020B. (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs May 2007 Logic Symbol Pin Description Pin Names Description OE1, OE2 3-STATE Output Enable Inputs I0-I7 Inputs O0-O7 3-STATE Outputs Truth Tables Inputs OE1 In Outputs (Pins 12, 14, 16, 18) L L L L H H H X Z OE2 In Outputs (Pins 3, 5, 7, 9) L L L L H H H X Z Inputs H = HIGH Voltage Level L = LOW Voltage Level Z = High Impedance (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 2 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs Connection Diagram Symbol Parameter Rating VCC Supply Voltage -0.5V to +7.0V VIN DC Input Voltage -0.5V to +7.0V VOUT DC Output Voltage Note 2 -0.5V to VCC + 0.5V Note 3 -0.5V to +7.0V IIK Input Diode Current -20mA IOK Output Diode Current(4) 20mA IOUT DC Output Current 25mA ICC DC VCC / GND Current TSTG TL 75mA Storage Temperature -65C to +150C Lead Temperature (Soldering, 10 seconds) 260C 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 Parameter VCC Supply Voltage VIN Input Voltage VOUT Rating 4.5V to +5.5V 0V to +5.5V Output Voltage Note 2 0V to VCC Note 3 0V to +5.5V TOPR Operating Temperature -40C to +85C tr , tf Input Rise and Fall Time, VCC = 5.0V 0.5V 0ns/V ~ 20ns/V Notes: 2. HIGH or LOW state. IOUT absolute maximum rating must be observed. 3. When outputs are in OFF-STATE or when VCC = 0V. 4. VOUT < GND, VOUT > VCC (Outputs Active). 5. Unused inputs must be held HIGH or LOW. They may not float. (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 3 74VHCT244A Octal Buffer/Line Driver with 3-STATE 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 = -40C to +85C TA = 25C Symbol Parameter VCC (V) Conditions Min. Typ. Max. Min. Max. Units VIH HIGH Level Input Voltage 4.5 2.0 5.5 2.0 VIL LOW Level Input Voltage 4.5 0.8 0.8 5.5 0.8 0.8 HIGH Level Output Voltage 4.5 LOW Level Output Voltage 4.5 IOZ 3-STATE Output OFF-STATE Current 5.5 IIN Input Leakage Current ICC VOH VOL VIN = VIH IOH = -50A or VIL IOH = -8mA 4.40 2.0 2.0 4.50 4.40 3.94 VIN = VIH IOL = 50A or VIL IOL = 8mA V V V 3.80 0.0 0.1 0.1 0.36 0.44 V VIN = VIH or VIL, VOUT = VCC or GND 0.25 2.5 A 0-5.5 VIN = 5.5V or GND 0.1 1.0 A Quiescent Supply Current 5.5 VIN = VCC or GND 4.0 40.0 A ICCT Maximum ICC /Input 5.5 VIN = 3.4V, Other Input = VCC or GND 1.35 1.50 mA IOFF Output Leakage Current (Power Down State) 0.0 VOUT = 5.5V 0.5 5.0 A Noise Characteristics TA = 25C Symbol Parameter VCC (V) Quiet Output Maximum Dynamic VOL 5.0 VOLV(6) Quiet Output Minimum Dynamic VOL VIHD(6) VILD(6) VOLP (6) Conditions Typ. Limits Units CL = 50pF 0.9 1.1 V 5.0 CL = 50pF -0.9 -1.1 V Minimum HIGH Level Dynamic Input Voltage 5.0 CL = 50pF 2.0 V Maximum HIGH Level Dynamic Input Voltage 5.0 CL = 50pF 0.8 V Note: 6. Parameter guaranteed by design. (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 4 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs DC Electrical Characteristics TA = -40C to +85C TA = 25C Symbol tPLH, tPHL tPZL, tPZH tPLZ, tPHZ Parameter VCC (V) Conditions Propagation Delay Time 5.0 0.5 3-STATE Output Enable Time 5.0 0.5 RL = 1k 3-STATE Output Disable Time 5.0 0.5 RL = 1k tOSLH, tOSHL Output to Output Skew Typ. Max. Min. Max. Units CL = 15pF 5.4 7.4 1.0 8.5 CL = 50pF 5.9 8.4 1.0 9.5 CL = 15pF 7.7 10.4 1.0 12.5 CL = 50pF 8.2 11.4 1.0 13.5 CL = 50pF 8.8 11.4 1.0 13.0 ns 1.0 1.0 ns 10 10 pF 5.0 0.5 (7) Input Capacitance VCC = Open COUT Output Capacitance CPD Power Dissipation Capacitance VCC (8) CIN Min. = 5.0V 4 ns ns 9 pF 18 pF Notes: 7. Parameter guaranteed by design. tOSLH = |tPLH max - tPLH min|; tOSHL = |tPHL max - tPHL min| 8. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (Opr.) = CPD * VCC * fIN + ICC / 8 (per F/F). The total CPD when n pcs. of the Octal D Flip-Flop operates can be calculated by the equation: CPD (total) = 20 + 12n (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 5 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs AC Electrical Characteristics 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs Physical Dimensions Dimensions are in millimeters unless otherwise noted. Figure 1. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 6 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 2. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 7 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 3. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 8 (R) ACEx Across the board. Around the world.TM ActiveArrayTM BottomlessTM Build it NowTM CoolFETTM CorePLUSTM CROSSVOLTTM CTLTM Current Transfer LogicTM DOMETM 2 E CMOSTM (R) EcoSPARK EnSignaTM FACT Quiet SeriesTM (R) FACT (R) FAST FASTrTM FPSTM (R) FRFET GlobalOptoisolatorTM GTOTM HiSeCTM i-LoTM ImpliedDisconnectTM IntelliMAXTM ISOPLANARTM MICROCOUPLERTM MicroPakTM MICROWIRETM Motion-SPMTM MSXTM MSXProTM OCXTM OCXProTM (R) OPTOLOGIC (R) OPTOPLANAR PACMANTM PDP-SPMTM POPTM (R) Power220 (R) Power247 PowerEdgeTM PowerSaverTM Power-SPMTM (R) PowerTrench Programmable Active DroopTM (R) QFET QSTM QT OptoelectronicsTM Quiet SeriesTM RapidConfigureTM RapidConnectTM ScalarPumpTM SMART STARTTM (R) SPM STEALTHTM SuperFETTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8 SyncFETTM TCMTM (R) The Power Franchise TinyBuckTM (R) TinyLogic TINYOPTOTM TinyPowerTM TinyWireTM TruTranslationTM SerDesTM (R) UHC UniFETTM VCXTM WireTM TM TinyBoostTM 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 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. I27 (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 9 74VHCT244A Octal Buffer/Line Driver 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. ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor's product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. 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Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. 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