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M74HC242F1R Datasheet(PDF) 1 Page - STMicroelectronics

Part # M74HC242F1R
Description  QUAD BUS TRANSCEIVER 3-STATE
Download  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC242F1R Datasheet(HTML) 1 Page - STMicroelectronics

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M54/74HC242
M54/74HC243
October 1993
QUAD BUS TRANSCEIVER (3-STATE)
B1R
(Plastic Package)
ORDER CODES :
M54HCXXXF1R
M74HCXXXM1R
M74HCXXXB1R
M74HCXXXC1R
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
INPUT AND OUTPUT EQUIVALENT CIRCUIT
DESCRIPTION
.
HIGH SPEED
tPD = 9 ns (TYP.) AT VCC =5 V
.
LOW POWER DISSIPATION
ICC =4
µA (MAX.) AT 25 °C
.
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
.
BALANCED PROPAGATION DELAYS
tPLH =tPHL
.
SYMMETRICAL OUTPUT IMPEDANCE
IOL =
IOH = 6 mA (MIN.)
.
HIGH NOISE IMMUNITY
VNIH =VNIL =28 % VCC (MIN.)
.
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
.
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS242/243
The M54/74HC242/243 are high speed CMOS
QUAD
BUS
TRANSCEIVER
(3-STATE)
FABRICATED
IN
SILICON
GATE
C
2MOS
technology. They have the same high speed
performance of LSTTL combined with true CMOS
low power consumption. The HC242/243 are 3
STATE bi-directional inverting and non-inverting
buffers and are intended for two-way asynchronous
communication between data buses. They are high
drive current outputs which enable high speed
operation when driving large bus capacitances.
Each device has one active high enable (GBA), and
one active low enable (GAB). GBA enables the A
outputs and GAB enables the B outputs. All inputs
are equipped with protection circuits against static
discharge and transient excess voltage.
HC243
HC242
1/11


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