MC74HC242N ,Quad 3-State Bus TransceiverMaximum Ratings are those values beyond which damage to the device may occur.ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ..
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MC74HC242N
Quad 3-State Bus Transceiver
SEMICONDUCTOR TECHNICAL DATA -
High–Performance Silicon–Gate CMOSThe MC74HC242 is identical in pinout to the LS242. The device inputs
are compatible with Standard CMOS outputs; with pullup resistors, they
are compatible with LSTTL outputs.
This quad bus transceiver is designed for asynchronous two–way
communications between data buses. The states of the Output Enables
(A–to–B Enable and B–to–A Enable) determine both the direction of data
flow (from A to B or from B to A) and the modes of the Data Ports (input,
output, or high–impedance). Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to CMOS, NMOS and TTL Operating Voltage Range: 2 to 6V Low Input Current: 1μA High Noise Immunity Characteristic of CMOS Devices In Compliance With the JEDEC Standard No. 7A Requirements Chip Complexity: 130 FET s or 32.5 Equivalent Gates
LOGIC DIAGRAM3
Output
EnableS
B Data
Port456
A–TO–B ENABLE
B–TO–A ENABLE
A Data
Port
Pinout: 14–Lead Plastic Package (Top View)VCC
B–to–A
Enable NC B1 B2 B3 B4
A–to–B
Enable A1 A2 A3 A4 GND
