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74VHCT540A Octal Buffer/Line Driver with 3-STATE Outputs
June 1997 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
s High Speed:
tPD
5.4 ns (typ) at VCC
5V 25qC
s Low Power Dissipation: ICC
4 PA (max) at TA
s Power down protection is provided on all inputs and outputs s Pin and function compatible with 74HCT540
Ordering Code:
Order Number 74VHCT540AM 74VHCT540ASJ 74VHCT540AMTC 74VHCT540AN Package Number M20B M20D MTC20 N20A Package Dissipation 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Pb-Free 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 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
IEEE/IEC
Connection Diagram
Truth Table Pin Descriptions
Pin Names OE1, OE2 I0 - I7 O0 - O7 Description 3-STATE Output Enable Inputs Inputs 3-STATE Outputs OE1 L H X L
H HIGH Voltage Level L LOW Voltage Level
Inputs OE2 L X H L I H X X L Outputs L Z Z H
X Immaterial Z High Impedance
(c) 2005 Fairchild Semiconductor Corporation
DS500012
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74VHCT540A
Absolute Maximum Ratings(Note 2)
Supply Voltage (VCC) DC Input Voltage (VIN ) DC Output Voltage (VOUT) (Note 3) (Note 4) Input Diode Current (IIK) Output Diode Current (IOK) (Note 5) DC Output Current (IOUT) DC VCC/GND Current (ICC) Storage Temperature (TSTG) Lead Temperature (TL) (Soldering, 10 seconds) 260qC
0.5V to 7.0V 0.5V to 7.0V 0.5V to 7.0V 0.5V to VCC 0.5V 20 mA r20 mA r25 mA r75 mA 65qC to 150qC
Recommended Operating Conditions (Note 6)
Supply Voltage (VCC) Input Voltage (VIN) Output Voltage (VOUT) (Note 4) (Note 3) Operating Temperature (TOPR) Input Rise and Fall Time (tr, tf) VCC 5.0V r 0.5V 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.
4.5V to 5.5V 0V to 5.5V 0V to VCC 0V to 5.5V
40qC to 85qC
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 VIH VIL VOH VOL IOZ IIN ICC ICCT IOFF Parameter VCC (V) 4.5 5.5 4.5 4.5 4.5 4.5 5.5 0 5.5 5.5 5.5 0 4.4 3.94 0.0 0.1 0.36 4.5 TA Min 2.0 0.8 4.4 3.80 0.1 0.44 25qC Typ Max TA
40qC to 85qC
Max 0.8 2.0
Min
Units V V V V V V VIN or VIL VIN or VIL
Conditions
HIGH Level Input Voltage 4.5 5.5 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
VIH VIH
IOH IOH IOL IOL
50 PA 8 mA
50 PA 8 mA
r0.25 r0.1
4.0 1.35 0.5
r2.5 r1.0
40.0 1.50 5.0
PA PA PA
mA
VIN VIH or VIL VOUT VCC or GND VIN VIN 5.5V or GND VCC or GND VCC or GND
VIN 3.4V other inputs VOUT 5.5V
PA
Noise Characteristics
Symbol VOLP (Note 7) VOLV (Note 7) VIHD (Note 7) VILD (Note 7) Parameter Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum HIGH Level Dynamic Input Voltage Maximum HIGH Level Dynamic Input Voltage 5.0 0.8 V CL 50 pF 5.0 2.0 V CL 50 pF 5.0 VCC (V) 5.0 TA Typ 1.2 25qC Limits 1.6 1.6 Units V V CL CL 50 pF 50 pF Conditions
1.2
Note 7: Parameter guaranteed by design.
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74VHCT540A
AC Electrical Characteristics
Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ tOSLH tOSHL CIN COUT CPD Parameter Propagation Delay Time 3-STATE Output Enable Time 3-STATE Output Disable Time Output to Output Skew Input Capacitance Output Capacitance Power Dissipation Capacitance
|tPLHmax t PLHmin|; tOSLH
VCC (V) 5.0 r 0.5 5.0 r 0.5 5.0 r 0.5 5.0 r 0.5
TA Min
25qC Typ 5.4 5.9 8.3 8.8 9.4 Max 7.4 8.4 11.3 12.3 11.9 1.0 4 9 19
|tPHLmax tPHLmin|.
TA
40qC to 85qC
Max 8.5 9.5 13.0 14.0 13.5 1.0 10 1.0 1.0 1.0 1.0 1.0
Min
Units ns ns ns ns pF pF pF RL RL
Conditions CL CL 1 k: CL CL 15 pF 50 pF 15 pF 50 pF 50 pF 50 pF
1 k: CL CL
(Note 8) VCC VCC
10
Open 5.0V
(Note 9)
Note 8: Parameter guaranteed by design. tOSLH
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).
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74VHCT540A
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B
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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
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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
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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. 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 THE PRESIDENT 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 to the user. 7 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. www.fairchildsemi.com
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