SN74LS240 SN74LS244 Octal Buffer/Line Driver with 3-State Outputs
The SN74LS240 and SN74LS244 are Octal Buffers and Line...
SN74LS240 SN74LS244 Octal Buffer/Line Driver with 3-State Outputs
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.
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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
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH Parameter Supply Voltage Operating Ambient Temperature Range Output Current – High Min 4.75 0 Typ 5.0 25 Max 5.25 70 – 3.0 – 15 IOL Output Current – Low 24 Unit V °C
20
Registers
LOW POWER
SCHOTTKY
mA mA mA
1
PLASTIC N SUFFIX CASE 738
20 1
SOIC DW SUFFIX CASE 751D
ORDERING INFORMATION
Device SN74LS240N SN74LS240DW SN74LS244N SN74LS244DW Package 16 Pin DIP 16 Pin 16 Pin DIP 16 Pin Shipping 1440 Units/Box 2500/Tape & Reel 1440 Units/Box 2500/Tape & Reel
© Semiconductor Components Industries, LLC, 1999
1
December, 1999 – Rev. 6
Publication Order Number: SN74LS240/D
SN74LS240 SN74LS244
LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) SN74LS240
VCC 20 2G 19 1Y1 18 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 17 16 15 14 13 12 11
1 1G
2 1A1
3 4 5 2Y4 1A2 2Y3
6 8 9 10 7 1A3 2Y2 1A4 2Y1 GND
SN74LS244
VCC 20 2G 19 1Y1 18 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 17 16 15 14 13 12 11
1 1G
2 1A1
3 4 5 2Y4 1A2 2Y3
6 8 9 10 7 1A3 2Y2 1A4 2Y1 GND
TRUTH TABLES SN74LS240
INPUTS OUTPUT 1G, 2G L L H D L H X H ...
