|Category||Logic => Buffers/Drivers => Buffers|
|Description||Octal Buffer/line Driver , Package: Soic, Pins=20|
|Datasheet||Download SN74LS240DW datasheet
|Cross ref.||Similar parts: SN74LS240DWR, CD74ACT240, CD74HCT240, CY74FCT240T, SN74ABT2240A, SN74ABT240A, SN74ACT240, SN74AHCT240, SN74ALS240A|
The SN74LS240 and SN74LS244 are Octal Buffers and Line Drivers designed to be employed as memory address drivers, clock drivers and bus-oriented transmitters/receivers which provide improved PC board density.
Hysteresis at Inputs to Improve Noise Margins 3-State Outputs Drive Bus Lines or Buffer Memory Address Input Clamp Diodes Limit High-Speed Termination Effects
Symbol VCC IO OH Parameter Supply Voltage Operating Ambient Temperature Range Output Current High Min 4.75 0 Typ 5.0 25 Max IOL Output Current Low 24 Unit V °C4 = Assembly Location = Wafer Lot = Year = Work Week
See detailed ordering and shipping information in the package dimensions section on page 5 of this data sheet.H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = HIGH Impedance
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VT+VT VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Hysteresis Input Clamp Diode Voltage 2.4 Output HIGH Voltage 2.0 0.25 VOL IOZH IOZL IIH IIL IOS Output LOW Voltage 0.35 Output Off Current HIGH Output Off Current LOW Input HIGH Current 0.1 Input LOW Current Output Short Circuit Current (Note 1) Power Supply Current Total, Output HIGH Total, Output LOW ICC Total at HIGH LS240 mA VCC = MAX 0.4 V Min 2.0 0.8 Typ Max Unit Test Conditions Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for All Inputs VCC = MIN VCC = MIN, IIN 18 mA VCC = MIN, IOH 3.0 mA VCC = MIN, IOH = MAX IOL 12 mA IOL 24 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table
VCC = MAX, VOUT 2.7 V VCC = MAX, VOUT 0.4 V VCC = MAX, VIN 2.7 V VCC = MAX, VIN 7.0 V VCC = MAX, VIN 0.4 V VCC = MAX54 1. Not more than one output should be shorted at a time, nor for more than 1 second.
Limits Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPLZ tPHZ Parameter Propagation Delay, Data to Output LS240 Propagation Delay, Data to Output LS244 Output Enable Time to HIGH Level Output Enable Time to LOW Level Output Disable Time from LOW Level Output Disable Time from HIGH Level Min Typ Max Unit = 5.0 pF, = 45 pF, = 667 Test Conditions
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