Revised April 2005 74VHCT541A Octal Buffer/Line Driver with 3-STATE Outputs General Description The VHCT541A is an advanced high-speed CMOS device fabricated with silicon gate CMOS technology. It achieves the high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The VHCT541A is an octal buffer/line driver designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. This device is similar in function to the VHCT244A while providing flow-through architecture (inputs on opposite side from outputs). This pinout arrangement makes this device especially useful as an output port for microprocessors, allowing ease of layout and greater PC board density. Protection circuits ensure that 0V to 7V can be applied to the input and output (Note 1) pins without regard to the supply voltage. This device can be used to interface 3V to 5V systems and two supply systems such as battery backup. This circuit prevents device destruction due to mismatched supply and input voltages. Note 1: Outputs in OFF-state. Features ■ High Speed: tPD 5.5 ns (typ) at VCC ■ Low power dissipation: ICC 5V 4 PA (max) at TA 25qC ■ Power down protection is provided on all inputs and outputs ■ Pin and function compatible with 74HCT541 Ordering Code: Order Number Package Number 74VHCT541AM 74VHCT541ASJ 74VHCT541AMTC 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MTC20 74VHCT541AN Package Description M20B N20A 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Pb-Free package per JEDEC J-STD-020B. Logic Symbol Connection Diagram IEEE/IEC Truth Table Inputs Pin Descriptions OE1 Outputs OE2 I Pin Names Description L L H OE1, OE2 3-STATE Output Enable Inputs H X X Z I0 - I7 Inputs X H X Z O0 - O7 3-STATE Outputs L L L L H X © 2005 Fairchild Semiconductor Corporation DS500013 HIGH Voltage Level Immaterial H L LOW Voltage Level Z High Impedance www.fairchildsemi.com 74VHCT541A Octal Buffer/Line Driver with 3-STATE Outputs June 1997 74VHCT541A Absolute Maximum Ratings(Note 2) Recommended Operating Conditions (Note 6) 0.5V to 7.0V 0.5V to 7.0V Supply Voltage (VCC) DC Input Voltage (VIN) 0V to 5.5V Input Voltage (VIN) (Note 3) 0.5V to 7.0V (Note 4) 0.5V to V CC + 0.5V 20 mA Input Diode Current (IIK) 4.5V to 5.5V Supply Voltage (VCC) DC Output Voltage (VOUT) Output Voltage (VOUT) Output Diode Current (IOK) (Note 4) 0V to VCC (Note 3) 0V to 5.5V 40qC to 85qC Operating Temperature (TOPR) r20 mA r25 mA r75 mA 65qC to 150qC (Note 5) DC Output Current (IOUT) DC VCC/GND Current (ICC) Storage Temperature (TSTG) Input Rise and Fall Time (tr, tf) VCC Lead Temperature (TL) 260 qC (Soldering, 10 seconds) 5.0V r0.5V 0 a 20 ns/V Note 2: Absolute Maximum Ratings are values beyond which the device may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation outside databook specifications. Note 3: When Outputs are in OFF-State OR when VCC 0V. Note 4: HIGH or LOW state IOUT absolute maximum rating must be observed. Note 5: VOUT GND,.VOUT ! VCC (Outputs Active). Note 6: Unused inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics Symbol Parameter Min 2.0 VIH HIGH Level Input Voltage 4.5 5.5 VIL LOW Level Input Voltage 4.5 5.5 V OH HIGH Level Output Voltage V OL LOW Level Output Voltage IOZ 3-STATE Output TA VCC (V) TA Max 40qC to 85qC Min 4.4 4.5 3.94 Max 2.0 0.8 4.5 4.5 25qC Typ 4.5 0.0 0.1 Units V 0.8 V 4.4 V 3.80 V 0.1 V Input Leakage Current VIN VIH IOH 8 mA IOL 50 PA IOL 8 mA VIN VIL VIN VIH or VIL 0.36 0.44 V 5.5 r0.25 r2.5 PA 0 5.5 r0.1 r1.0 PA VIN 5.5V or GND VCC or GND VOUT VCC or GND ICC Quiescent Supply Current 5.5 4.0 40.0 PA VIN ICCT Maximum ICC/Input 5.5 1.35 1.50 mA VIN 3.4V Other Inputs IOFF Output Leakage Current 0 0.5 5.0 PA VOUT www.fairchildsemi.com 50 PA IOH 4.5 Off-State Current IIN Conditions 2 5.5V VCC or GND 74VHCT541A Noise Characteristics Symbol Parameter TA 25qC VCC (V) Typ Limits Units Conditions VOLP (Note 7) Quiet Output Maximum Dynamic VOL 5.0 1.2 1.6 V CL 50 pF VOLV (Note 7) Quiet Output Minimum Dynamic VOL 5.0 1.2 1.6 V CL 50 pF VIHD (Note 7) Minimum HIGH Level Dynamic Input Voltage 5.0 2.0 V CL 50 pF VILD (Note 7) Maximum HIGH Level Dynamic Input Voltage 5.0 0.8 V CL 50 pF Note 7: Parameter guaranteed by design. AC Electrical Characteristics Symbol Parameter tPLH Propagation Delay tPHL Time tPZL 3-STATE Output tPZH Enable Time tPLZ 3-STATE Output tPHZ Disable Time tOSLH Output to Output Skew VCC (V) TA Min 5.0 r 0.5 5.0 r 0.5 5.0 r 0.5 25qC Typ TA Max 40qC to 85qC Min Max Units 5.0 6.9 1.0 8.0 5.5 7.9 1.0 9.0 8.3 11.3 1.0 13.0 8.8 12.3 1.0 14.0 9.4 11.9 1.0 13.5 ns 1.0 1.0 ns 10 10 5.0 r 0.5 Conditions ns ns RL RL CL 15 pF CL 50 pF 1 k: CL 15 pF CL 50 pF 1 k: CL 50 pF (Note 8) CL 50 pF tOSHL CIN Input Capacitance 4 pF VCC Open COUT Output Capacitance 9 pF VCC 5.0V CPD Power Dissipation Capacitance 19 pF (Note 9) Note 8: Parameter guaranteed by design. tOSLH |tPLHmax t PLHmin|; tOSHL |tPHLmax tPHLmin|. Note 9: 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 bit). 3 www.fairchildsemi.com 74VHCT541A Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B www.fairchildsemi.com 4 74VHCT541A Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D 5 www.fairchildsemi.com 74VHCT541A 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 www.fairchildsemi.com 6 74VHCT541A Octal Buffer/Line Driver with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Package Number N20A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. 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