OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HC7240: INVERTED - HC7241/7244 NON INVERTED - ST Microelectronics
Description
M54HC7240/7241/7244 M74HC7240/7241/7244
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HC7240: INVERTED - HC7241/7244 NON INVERTED
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HIGH SPEED tPD = 15 ns (TYP.
) at VCC = 5V LOW POWER DISSIPATION o ICC = 4 µA (MAX.
) at TA = 25 C HIGH NOISE IMMUNITY VH = 1.
1 V(TYP.
) at VCC = 5V OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 6 mA (MIN) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 54/74LS240/241/244
B1R (Plastic Package)
F1R (Ceramic Package)
M1R (Micro Package)
C1R (Chip Carrier)
ORDER CODES : M54HCXXXXF1R M74HCXXXXM1R M74HCXXXXB1R M74HCXXXXC1R
DESCRIPTION The M54/74HC7240, HC7241 and HC7244 are high speed CMOS OCTAL BUS BUFFERs fabricated in silicon gate C2MOS technology.
They have the same high speed performance of LSTTL combined with true CMOS low power consumption.
The designer has a choise of select combination of inverting and non-inverting outputs, symmetrical G (active low output control) input, and complementary G and G inputs.
Each control input PIN CONNECTION (top view)
HC7240 HC7241 HC7244
governs four BUS BUFFERs.
The HC7240, HC7241 and HC7244 have the same pin configuration and function as the HC240, HC241 and HC244 and they have a hysteresis characteristics with each input so can be used as a line receiver, etc.
All inputs are equipped with protection circuits against static discharge and transient excess voltage.
October 1993
1/12
M54/M74HC7240/7241/7244
CHIP CARRIER
HC7240 HC7241 HC7244
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION (HC7240)
PIN No 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 SYMBOL 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 1Y1 to 1Y4 2G GND VCC NAME AND FUNCTION Output Enable Input Data Inputs Data Outputs Data Inputs Data Outputs Output Enabel Input Ground (0V) Positive Supply Voltage
PIN DESCRIPTION (HC7241)
PIN No 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 SYMBOL...
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