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74F540 * 74F541 Octal Buffer/Line Driver with 3-STATE Outputs
April 1988 Revised October 2000
74F540 * 74F541 Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The 74F540 and 74F541 are similar in function to the 74F240 and 74F244 respectively, except that the inputs and outputs are on opposite sides of the package (see Connection Diagrams). This pinout arrangement makes these devices especially useful as output ports for microprocessors, allowing ease of layout and greater PC board density.
Features
s 3-STATE outputs drive bus lines s Inputs and outputs opposite side of package, allowing easier interface to microprocessors
Ordering Code:
Order Number 74F540SC 74F540SJ 74F540PC 74F541SC 74F541SJ 74F541PC Package Number M20B M20D N20A M20B M20D N20A 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 Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 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 Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbols
IEEE/IEC 74F540
Connection Diagrams
74F540
IEEE/IEC 74F541
74F541
(c) 2000 Fairchild Semiconductor Corporation
DS009553
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74F540 * 74F541
Unit Loading/Fan Out
U.L. Pin Names OE1, OE2 In On, On Description HIGH/LOW 3-STATE Output Enable Input (Active LOW) Inputs Outputs 1.0/1.0 1.0/1.0 Input IIH/IIL Output IOH/IOL 20 A/-0.6 mA 20 A/-0.6 mA
600/106.6 (80) -12 mA/64 mA (48 mA)
Truth Table
Inputs OE1 L H X L
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
Outputs I H X X L 74F540 L Z Z H 74F541 H Z Z L
OE2 L X H L
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74F540 * 74F541
Absolute Maximum Ratings(Note 1)
Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output 3-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA)
-65C to +150C -55C to +125C -55C to +150C -0.5V to +7.0V -0.5V to +7.0V -30 mA to +5.0 mA
Recommended Operating Conditions
Free Air Ambient Temperature Supply Voltage 0C to +70C
+4.5V to +5.5V
-0.5V to VCC -0.5V to +5.5V
Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol VIH VIL VCD VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage VOL IIH IBVI ICEX VID IOD IIL IOZH IOZL IOS IZZ ICCH ICCL ICCZ ICCH ICCL ICCZ Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current Output Leakage Current Output Leakage Current Output Short-Circuit Current Bus Drainage Test Power Supply Current (74F540) Power Supply Current (74F540) Power Supply Current (74F540) Power Supply Current (74F541) Power Supply Current (74F541) Power Supply Current (74F541) 11 53 31 26 55 31 -100 4.75 3.75 -0.6 50 -50 -225 500 20 75 45 35 75 55 10% VCC 10% VCC 5% VCC 10% VCC 2.4 2.0 2.7 0.55 5.0 7.0 50 V A A A V A mA A A mA A mA mA mA mA mA mA Min Max Max Max 0.0 0.0 Max Max Max Max 0.0V Max Max Max Max Max Max V Min Min 2.0 0.8 -1.2 Typ Max Units V V V Min VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal IIN = -18 mA IOH = -3 mA IOH = -15 mA IOH = -3 mA IOL = 64 mA VIN = 2.7V VIN = 7.0V VOUT = VCC IID = 1.9 A All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded VIN = 0.5V VOUT = 2.7V VOUT = 0.5V VOUT = 0V VOUT = 5.25V VO = HIGH VO = LOW VO = HIGH Z VO = HIGH VO = LOW VO = HIGH Z
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74F540 * 74F541
AC Electrical Characteristics
TA = +25C Symbol Parameter Min tPLH tPHL tPZH tPZL tPHZ tPLZ tPLH tPHL tPZH tPZL tPHZ tPLZ Output Disable Time (74F541) Propagation Delay Data to Output (74F541) Output Enable Time (74F541) Output Disable Time (74F540) Propagation Delay Data to Output (74F540) Output Enable Time (74F540) 1.5 1.0 2.5 3.5 1.5 1.0 1.5 1.5 3.0 3.5 1.5 1.5 VCC = +5.0V CL = 50 pF Typ 3.0 2.0 4.9 5.8 3.4 2.5 3.3 2.7 5.8 6.1 3.4 2.9 Max 5.0 4.0 8.0 10.0 6.0 5.5 5.5 5.5 8.0 8.5 6.0 5.5 TA = -55C to +125C VCC = +5.0V CL = 50 pF Min 1.0 1.0 2.5 3.5 1.5 1.0 Max 6.0 4.5 9.0 11.0 7.0 7.5 TA = 0C to +70C VCC = +5.0V CL = 50 pF Min 1.0 1.0 2.5 3.5 1.5 1.0 1.5 1.5 2.5 3.0 1.5 1.5 Max 5.5 4.0 8.5 10.5 6.5 6.0 6.0 6.0 9.5 9.5 6.5 6.0 ns ns ns ns Units
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74F540 * 74F541
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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74F540 * 74F541
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
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74F540 * 74F541 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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