74VHC541 Octal Buffer/Line Driver with 3-STATE Outputs August 1993 Revised May 2005 74VHC541 Octal Buffer/Line Driver with 3-STATE Outputs An input protection circuit insures that 0V to 7V can be General Description applied to the input pins without regard to the supply volt- The VHC541 is an advanced high-speed CMOS device age. This device can be used to interface 5V to 3V systems fabricated with silicon gate CMOS technology. It achieves and two supply systems such as battery backup. This cir- the high-speed operation similar to equivalent Bipolar cuit prevents device destruction due to mismatched supply Schottky TTL while maintaining the CMOS low power dissi- and input voltages. pation. The VHC541 is an octal buffer/line driver designed to be Features employed as memory and address drivers, clock drivers High Speed: t 3.5 ns (typ) at V 5V and bus oriented transmitter/receivers. PD CC Low power dissipation: I 4 PA (max) at T 25qC This device is similar in function to the VHC244 while pro- CC A viding flow-through architecture (inputs on opposite side High noise immunity: V V 28% V (min) NIH NIL CC from outputs). This pinout arrangement makes this device Power down protection is provided on all inputs especially useful as an output port for microprocessors, Low noise: V 0.9V (typ) allowing ease of layout and greater PC board density. OLP Pin and function compatible with 74HC541 Ordering Code: Order Number Package Number Package Description 74VHC541M M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74VHC541SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHC541MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74VHC541N N20A 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. Connection Diagram Logic Symbol IEEE/IEC Truth Table Pin Descriptions Inputs Outputs Pin Names Descriptions OE OE I 1 2 OE , OE 3-STATE Output Enable Inputs 1 2 LL H H I - I Inputs 0 7 HX X Z O - O 3-STATE Outputs 0 7 XH X Z LLL L H HIGH Voltage Level X Immaterial L LOW Voltage Level Z High Impedance 2005 Fairchild Semiconductor Corporation DS011639 www.fairchildsemi.comAbsolute Maximum Ratings(Note 1) Recommended Operating Conditions (Note 2) Supply Voltage (V ) 0.5V to 7.0V CC DC Input Voltage (V ) 0.5V to 7.0V Supply Voltage (V ) 2.0V to 5.5V IN CC DC Output Voltage (V ) 0.5V to V 0.5V Input Voltage (V )0V to 5.5V OUT CC IN Input Diode Current (I ) 20 mA Output Voltage (V ) 0V to V IK OUT CC Output Diode Current (I ) r20 mA Operating Temperature (T ) 40qC to 85qC OK OPR DC Output Current (I ) r25 mA Input Rise and Fall Time (t , t ) OUT r f DC V /GND Current (I ) r75 mA V 3.3V r0.3V 0 a 100 ns/V CC CC CC Storage Temperature (T ) 65qC to 150qC V 5.0V r0.5V 0 a 20 ns/V STG CC Note 1: Absolute Maximum Ratings are values beyond which the device Lead Temperature (T ) L may be damaged or have its useful life impaired. The databook specifica- (Soldering, 10 seconds) 260qC tions should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading vari- ables. Fairchild does not recommend operation outside databook specifica- tions. Note 2: Unused inputs must be held HIGH or LOW. They may not float DC Electrical Characteristics T 25qCT 40qC to 85qC V A A CC Symbol Parameter Units Conditions (V) Min Typ Max Min Max V HIGH Level Input 2.0 1.50 1.50 IH V Voltage 3.0 5.5 0.7 V 0.7 V CC CC V LOW Level Input 2.0 0.50 0.50 IL V Voltage 3.0 5.5 0.3 V 0.3 V CC CC V HIGH Level Output 2.0 1.9 2.0 1.9 V V I 50 PA OH IN IH OH Voltage 3.0 2.9 3.0 2.9 V or V IL 4.5 4.4 4.5 4.4 3.0 2.58 2.48 I 4 mA OH V 4.5 3.94 3.80 I 8 mA OH V LOW Level Output 2.0 0.0 0.1 0.1 V V I 50 PA OL IN IH OL Voltage 3.0 0.0 0.1 0.1 V or V IL 4.5 0.0 0.1 0.1 3.0 0.36 0.44 I 4 mA OL V 4.5 0.36 0.44 I 8 mA OL I 3-STATE Output 5.5 r0.25 r2.5 V V or V OZ IN IH IL PA Off-State Current V V or GND OUT CC I Input Leakage Current 0 5.5 r0.1 r1.0 PAV 5.5V or GND IN IN I Quiescent Supply Current 5.5 4.0 40.0 PAV V or GND CC IN CC Noise Characteristics T 25qC V A CC Symbol Parameter Units Conditions (V) Typ Limits V Quiet Output Maximum Dynamic 5.0 0.9 1.2 V C 50 pF OLP L (Note 3) V OL V Quiet Output Minimum Dynamic 5.0 0.8 1.0 V C 50 pF OLV L (Note 3) V OL V Minimum HIGH Level Dynamic 5.0 3.5 V C 50 pF IHD L (Note 3) Input Voltage V Maximum HIGH Level Dynamic 5.0 1.5 V C 50 pF ILD L (Note 3) Input Voltage Note 3: Parameter guaranteed by design. www.fairchildsemi.com 2 74VHC541