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MC74HC540A Datasheet(PDF) 4 Page - ON Semiconductor

Part No. MC74HC540A
Description  Octal 3-State Inverting Buffer/Line Driver/Line Receiver
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC74HC540A Datasheet(HTML) 4 Page - ON Semiconductor

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MC74HC540A
http://onsemi.com
4
CL*
*Includes all probe and jig capacitance
TEST
POINT
DEVICE
UNDER
TEST
OUTPUT
TEST CIRCUITS
Figure 3.
Figure 4.
CL*
*Includes all probe and jig capacitance
TEST
POINT
DEVICE
UNDER
TEST
OUTPUT
1k
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ and tPZH.
PIN DESCRIPTIONS
INPUTS
A1, A2, A3, A4, A5, A6, A7, A8 (PINS 2, 3, 4, 5, 6, 7, 8,
9) — Data input pins. Data on these pins appear in inverted
form on the corresponding Y outputs, when the outputs are
enabled.
CONTROLS
OE1, OE2 (PINS 1, 19) — Output enables (active–low).
When a low voltage is applied to both of these pins, the
outputs are enabled and the device functions as an inverter.
When a hgih voltage is applied to either input, the outputs
assume the high impedance state.
OUTPUTS
Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8 (PINS 18, 17, 16, 15, 14,
13, 12, 11) — Device outputs. Depending upon the state of
the output enable pins, these outputs are either inverting
outputs or high–impedance outputs.
LOGIC DETAIL
One of Eight
Inverters
INPUT A
OE1
OE2
OUTPUT Y
VCC
To 7 Other
Inverters


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