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| 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs May 2007 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs Features High Speed: tPD = 5.9ns (Typ.) at VCC = 5V Power down protection is provided on inputs and tm General Description 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. 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 outputs Low power dissipation: ICC = 4A (Max.) @ TA = 25C Pin and function compatible with 74HCT244 Ordering Information Order Number 74VHCT244AM 74VHCT244ASJ 74VHCT244AMTC Package Number M20B M20D MTC20 Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 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 Connection Diagram Logic Symbol Pin Description Pin Names OE1, OE2 I0-I7 O0-O7 Inputs 3-STATE Outputs Description 3-STATE Output Enable Inputs Truth Tables Inputs OE1 L L H In L H X Outputs (Pins 12, 14, 16, 18) L H Z Inputs OE2 L L H In L H X Outputs (Pins 3, 5, 7, 9) L H Z 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 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. Symbol VCC VIN VOUT Supply Voltage DC Input Voltage DC Output Voltage Note 2 Note 3 IIK IOK IOUT ICC TSTG TL Input Diode Current Output Diode Current(4) DC Output Current DC VCC / GND Current Storage Temperature Parameter Rating -0.5V to +7.0V -0.5V to +7.0V -0.5V to VCC + 0.5V -0.5V to +7.0V -20mA 20mA 25mA 75mA -65C to +150C 260C Lead Temperature (Soldering, 10 seconds) 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 VIN VOUT Supply Voltage Input Voltage Output Voltage Note 2 Note 3 TOPR tr , tf Operating Temperature Parameter Rating 4.5V to +5.5V 0V to +5.5V 0V to VCC 0V to +5.5V -40C to +85C 0ns/V ~ 20ns/V Input Rise and Fall Time, VCC = 5.0V 0.5V 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 DC Electrical Characteristics TA = 25C Symbol VIH VIL VOH VOL IOZ IIN ICC ICCT IOFF TA = -40C to +85C Min. 2.0 2.0 0.8 0.8 0.8 0.8 4.40 3.80 0.1 0.36 0.1 0.44 2.5 1.0 40.0 1.50 5.0 A A A mA A V V V Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Voltage 3-STATE Output OFF-STATE Current Input Leakage Current Quiescent Supply Current Maximum ICC /Input Output Leakage Current (Power Down State) VCC (V) 4.5 5.5 4.5 5.5 4.5 4.5 5.5 0-5.5 5.5 5.5 0.0 Conditions Min. 2.0 2.0 Typ. Max. Max. Units V VIN = VIH IOH = -50A or VIL IOH = -8mA VIN = VIH IOL = 50A or VIL IOL = 8mA VIN = VIH or VIL, VOUT = VCC or GND VIN = 5.5V or GND VIN = VCC or GND VIN = 3.4V, Other Input = VCC or GND VOUT = 5.5V 4.40 3.94 4.50 0.0 0.25 0.1 4.0 1.35 0.5 Noise Characteristics TA = 25C Symbol VOLP (6) Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum HIGH Level Dynamic Input Voltage VCC (V) 5.0 5.0 5.0 5.0 Conditions CL = 50pF CL = 50pF CL = 50pF CL = 50pF Typ. 0.9 -0.9 Limits 1.1 -1.1 2.0 0.8 Units V V V V VOLV(6) VIHD(6) VILD(6) 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 AC Electrical Characteristics TA = 25C Symbol tPLH, tPHL tPZL, tPZH tPLZ, tPHZ TA = -40C to +85C 7.4 8.4 1.0 1.0 1.0 1.0 1.0 8.5 9.5 12.5 13.5 13.0 1.0 10 ns ns pF pF pF ns ns Parameter Propagation Delay Time 3-STATE Output Enable Time 3-STATE Output Disable Time VCC (V) 5.0 0.5 Conditions CL = 15pF CL = 50pF CL = 15pF CL = 50pF CL = 50pF Min. Typ. Max. Min. Max. Units 5.4 5.9 7.7 8.2 8.8 5.0 0.5 RL = 1k 5.0 0.5 RL = 1k 5.0 0.5 (7) 10.4 11.4 11.4 1.0 tOSLH, tOSHL Output to Output Skew CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance VCC = Open VCC (8) = 5.0V 4 9 18 10 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 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 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. 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 (R) 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 TM TinyBuckTM (R) TinyLogic TINYOPTOTM TinyPowerTM TinyWireTM TruTranslationTM SerDesTM (R) UHC UniFETTM VCXTM WireTM 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. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. 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. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. Rev. I27 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. No Identification Needed Full Production Obsolete Not In Production (c)1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 www.fairchildsemi.com 9 |
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