Revised April 2005 74VHCT540A Octal Buffer/Line Driver with 3-STATE Outputs General Description The VHCT540A 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 VHCT540A 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 VHCT240A 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 5.4 ns (typ) at VCC 5V 4 PA (max) at TA ■ Low Power Dissipation: ICC 25qC ■ Power down protection is provided on all inputs and outputs ■ Pin and function compatible with 74HCT540 Ordering Code: Order Number Package Number 74VHCT540AM 74VHCT540ASJ 74VHCT540AMTC 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 74VHCT540AN Package Dissipation 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 Pin Descriptions Inputs OE1 Pin Names Description OE1, OE2 3-STATE Output Enable Inputs I0 - I7 O0 - O7 OE2 I Outputs L L H L H X X Z Inputs X H X Z 3-STATE Outputs L L L H H HIGH Voltage Level L LOW Voltage Level © 2005 Fairchild Semiconductor Corporation DS500012 X Immaterial Z High Impedance www.fairchildsemi.com 74VHCT540A Octal Buffer/Line Driver with 3-STATE Outputs June 1997 74VHCT540A 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 ) 4.5V to 5.5V Supply Voltage (VCC) DC Output Voltage (VOUT) 0V to 5.5V Input Voltage (VIN) 0.5V to 7.0V 0.5V to VCC 0.5V 20 mA (Note 3) (Note 4) Input Diode Current (IIK) 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) Lead Temperature (TL) 260 qC (Soldering, 10 seconds) 5.0V r 0.5V VCC 0 | 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 OV. 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 VCC (V) Parameter TA Min 25qC TA Typ VIH HIGH Level Input Voltage 4.5 5.5 VIL LOW Level Input Voltage VOH HIGH Level 4.5 4.4 Output Voltage 4.5 3.94 VOL LOW Level 4.5 Output Voltage 4.5 IOZ 3-STATE Output OFF-STATE Current IIN Input Leakage Current ICC Max 40qC to 85qC Min 2.0 Max 2.0 4.5 5.5 0.0 Conditions V 0.8 0.8 4.5 Units V 4.4 V VIN 3.80 V or VIL VIN 0.1 0.1 V 0.36 0.44 V or VIL VIH VIH IOH 50 PA IOH 8 mA IOL 50 PA IOL 8 mA 5.5 r0.25 r2.5 PA VIN VIH or VIL VOUT VCC or GND 0 5.5 r0.1 r1.0 PA VIN 5.5V or GND Quiescent Supply Current 5.5 4.0 40.0 PA VIN VCC or GND 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 5.5V Noise Characteristics Symbol Parameter VOLP Quiet Output Maximum (Note 7) Dynamic VOL VOLV Quiet Output Minimum (Note 7) Dynamic VOL VIHD Minimum HIGH Level Dynamic (Note 7) Input Voltage VILD Maximum HIGH Level Dynamic (Note 7) Input Voltage TA Typ Limits 5.0 1.2 1.6 V CL 50 pF 5.0 1.2 1.6 V CL 50 pF 5.0 2.0 V CL 50 pF 5.0 0.8 V CL 50 pF Note 7: Parameter guaranteed by design. www.fairchildsemi.com 25qC VCC (V) 2 Units Conditions VCC or GND 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 tOSHL Skew CIN Input Capacitance COUT Output Capacitance CPD Power Dissipation Capacitance Note 8: Parameter guaranteed by design. tOSLH VCC (V) TA Min 5.0 r 0.5 5.0 r 0.5 5.0 r 0.5 25qC 40qC to 85qC Max Min Max 5.4 7.4 1.0 8.5 5.9 8.4 1.0 9.5 8.3 11.3 1.0 13.0 8.8 12.3 1.0 14.0 9.4 11.9 1.0 13.5 5.0 r 0.5 Units Conditions ns CL 15 pF CL 50 pF CL 15 pF ns RL 1 k: CL 50 pF ns RL 1 k: CL 50 pF 1.0 1.0 ns (Note 8) 10 10 pF VCC Open 9 pF VCC 5.0V 19 pF (Note 9) 4 |tPLHmax t PLHmin|; tOSLH TA Typ CL 50 pF |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 I CC/8 (per bit). 3 www.fairchildsemi.com 74VHCT540A AC Electrical Characteristics 74VHCT540A 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 74VHCT540A 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 74VHCT540A 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 74VHCT540A 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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