Revised September 2000 74F240 • 74F241 • 74F244 Octal Buffers/Line Drivers with 3-STATE Outputs General Description Features The 74F240, 74F241 and 74F244 are octal buffers and line drivers designed to be employed as memory and address drivers, clock drivers and bus-oriented transmitters/receivers which provide improved PC and board density. ■ 3-STATE outputs drive bus lines or buffer memory address registers ■ Outputs sink 64 mA (48 mA mil) ■ 12 mA source current ■ Input clamp diodes limit high-speed termination effects Ordering Code: Order Code Package Number Package Description 74F240SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74F240SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F240PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 74F241SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74F241SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F241PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 74F244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74F244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F244MSA 74F244PC MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide N20A 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. Connection Diagrams 74F240 74F241 74F244 © 2000 Fairchild Semiconductor Corporation DS009501 www.fairchildsemi.com 74F240 • 74F241 • 74F244 Octal Buffers/Line Drivers with 3-STATE Outputs April 1988 74F240 • 74F241 • 74F244 Logic Symbols IEEE/IEC 74F240 IEEE/IEC 74F241 IEEE/IEC 74F244 Unit Loading/Fan Out Pin Names Description U.L. Input IIH/IIL HIGH/LOW Output IOH/IOL OE1, OE2 3-STATE Output Enable Input (Active LOW) 1.0/1.667 20 µA/−1 mA OE2 3-STATE Output Enable Input (Active HIGH) 1.0/1.667 20 µA/−1 mA I0–I7 Inputs (74F240) 1.0/1.667 (Note 1) 20 µA/−1 mA I0–I7 Inputs (74F241, 74F244) 1.0/2.667 (Note 1) 20 µA/−1.6 mA 600/106.6 (80) −12 mA/64 mA (48 mA) O0–O7, O0–O7 Outputs Note 1: Worst-case 74F240 enabled; 74F241, 74F244 disabled Truth Tables 74F240 OE1 74F244 D1n O1n OE2 D2n O2n OE1 H X Z L H L L L H H X Z H L H L L L L H D1n O1n L L OE2 D2n O2n H X Z L X Z L H H H H H L L L H L L www.fairchildsemi.com O1n OE2 X Z H X Z H H L H H L L L L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance 74F241 OE1 D1n 2 D2n O2n Recommended Operating Conditions Storage Temperature −65°C to +150°C Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage 0°C to +70°C +4.5V to +5.5V −0.5V to +7.0V VCC Pin Potential to Ground Pin Input Voltage (Note 3) −0.5V to +7.0V Input Current (Note 3) −30 mA to +5.0 mA Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output −0.5V to VCC 3-STATE Output −0.5V to +5.5V Note 2: 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. Current Applied to Output in LOW State (Max) Note 3: Either voltage limit or current limit is sufficient to protect inputs. twice the rated IOL (mA) ESD Last Passing Voltage (Min) 4000V DC Electrical Characteristics Symbol Parameter Min Typ Max Input HIGH Voltage VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V VOH Output HIGH 10% VCC 2.4 Voltage 10% VCC 2.0 5% VCC 2.7 VOL Output LOW Voltage IIH Input HIGH 2.0 Units VIH Input HIGH Current Output HIGH Leakage Current VID Input Leakage Test IOD IIN = −18 mA IOH = −15 mA V Min 0.55 V Min IOL = 64 mA 5.0 µA Max VIN = 2.7V 7.0 µA Max VIN = 7.0V 50 µA Max VOUT = VCC V 0.0 µA 0.0 mA Max 4.75 Output Leakage 3.75 Circuit Current IIL Recognized as a LOW Signal Min IOH = −3 mA 10% VCC Breakdown Test ICEX Conditions Recognized as a HIGH Signal IOH = −3 mA Current IBVI VCC V −1.0 Input LOW Current −1.6 IID = 1.9 µA All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded VIN = 0.5V (OE1, OE 2, OE2, Dn 74F240)) VIN = 0.5V (Dn (74F241, 74F244)) IOZH Output Leakage Current 50 µA Max VOUT = 2.7V IOZL Output Leakage Current −50 µA Max VOUT = 0.5V IOS Output Short-Circuit Current −225 mA Max VOUT = 0V IZZ Bus Drainage Test 500 µA 0.0V VOUT = 5.25V ICCH Power Supply Current (74F240) 19 29 mA Max VO = HIGH ICCL Power Supply Current (74F240) 50 75 mA Max VO = LOW ICCZ Power Supply Current (74F240) 42 63 mA Max VO = HIGH Z ICCH Power Supply Current 40 60 mA Max VO = HIGH 60 90 mA Max VO = LOW 60 90 mA Max VO = HIGH Z (74F241, 74F244) ICCL Power Supply Current (74F241, 74F244) ICCZ Power Supply Current (74F241, 74F244) −100 3 www.fairchildsemi.com 74F240 • 74F241 • 74F244 Absolute Maximum Ratings(Note 2) 74F240 • 74F241 • 74F244 AC Electrical Characteristics Symbol Parameter TA = +25°C TA = −55°C to +125°C TA = 0°C to +70°C VCC = +5.0V VCC = 5.0V VCC = 5.0V CL = 50 pF CL = 50 pF CL = 50 pF Min Typ Max Min Max Min tPLH Propagation Delay 3.0 5.1 7.0 3.0 9.0 3.0 8.0 tPHL Data to Output (74F240) 2.0 3.5 4.7 2.0 6.0 2.0 5.7 tPZH Output Enable Time (74F240) 2.0 3.5 4.7 2.0 6.5 2.0 5.7 4.0 6.9 9.0 4.0 10.5 4.0 10.0 2.0 4.0 5.3 2.0 6.5 2.0 6.3 2.0 6.0 8.0 2.0 12.5 2.0 9.5 tPZL tPHZ Output Disable Time (74F240) tPLZ Max tPLH Propagation Delay 2.5 4.0 5.2 2.0 6.5 2.5 6.2 tPHL Data to Output (74F241, 74F244) 2.5 4.0 5.2 2.0 7.0 2.5 6.5 tPZH Output Enable Time 2.0 4.3 5.7 2.0 7.0 2.0 6.7 tPZL (74F241, 74F244) 2.0 5.4 7.0 2.0 8.5 2.0 8.0 tPHZ Output Disable Time 2.0 4.5 6.0 2.0 7.0 2.0 7.0 tPLZ (74F241, 74F244) 2.0 4.5 6.0 2.0 7.5 2.0 7.0 www.fairchildsemi.com 4 Units ns ns ns ns 74F240 • 74F241 • 74F244 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B 5 www.fairchildsemi.com 74F240 • 74F241 • 74F244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D www.fairchildsemi.com 6 74F240 • 74F241 • 74F244 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA20 7 www.fairchildsemi.com 74F240 • 74F241 • 74F244 Octal Buffers/Line Drivers 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: 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. 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. www.fairchildsemi.com www.fairchildsemi.com 8