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STMicroelectronics Electronic Components Datasheet

M54HCT540 Datasheet

OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT540: INVERTED - HCT541 NON INVERTED

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M54HCT540 pdf
M54HCT540/541
M74HCT540/541
OCTAL BUS BUFFER WITH 3 STATE OUTPUTS
HCT540: INVERTED - HCT541 NON INVERTED
. HIGH SPEED
tPD = 10 ns (TYP.) at VCC = 5V
. LOW POWER DISSIPATION
ICC = 4 ยตA (MAX.) at TA = 25 oC
. COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX.)
. OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 6 mA (MIN)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS540/541
DESCRIPTION
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
C1R
(Micro Package)
(Chip Carrier)
ORDER CODES :
M54HCTXXXF1R M74HCTXXXM1R
M74HCTXXXB1R M74HCTXXXC1R
The M54/74HCT540 and HCT541 are high speed
CMOS OCTAL BUS BUFFERS (3-STATE)
fabricated in silicon gate C2MOS technology. They
have the same high speed performance of LSTTL
combined with true CMOS low power consumption.
The HCT540 is an inverting buffer and HCT541 is a
non inverting buffer.
The 3 STATE control gate operates as a two input
AND such that if either G1 and G2 are high, all eight
outputs are in the high impedance state. In order to
enhance PC board layout, the HCT540 and
HCT541 offers a pinout having inputs and outputs
on opposite sides of the package. All inputs are
equipped with protection circuits against static
discharge and transient excess voltage.
This integrated circuit has input and output
characteristics that are fully compatible with 54/74
LSTTL logic families. M54/74HCT devices are
designed to directly interface HSC2MOS systems
with TTL and NMOS components. They are also
plug in replacements for LSTTL devices giving a
reduction of power consumption.
IT IS PROHIBITED TO APPLY A SIGNAL TO BUS
TERMINAL WHEN IT IS IN OUTPUT MODE.
WHEN A BUS TERMINAL IS FLOATING (HIGH
IMPEDANCE STATE) IT IS REQUESTED TO FIX
THE INPUT LEVEL BY MEANS OF EXTERNAL
PULL DOWN OR PULL UP RESISTOR.
PIN CONNECTION (top view)
HCT540
HCT541
October 1993
1/12


STMicroelectronics Electronic Components Datasheet

M54HCT540 Datasheet

OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT540: INVERTED - HCT541 NON INVERTED

No Preview Available !

M54HCT540 pdf
M54/M74HCT540/541
CHIP CARRIER
HCT540
H CT 54 1
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION (HCT540)
PIN No
1, 19
2, 3, 4, 5,
6, 7, 8, 9
18, 17, 16,
15, 14, 13,
11, 12
10
20
SYMBOL
G1, G2
A1 to A8
Y1 to Y8
GND
VCC
NAME AND FUNCTION
Output Enable Inputs
Data Inputs
Bus Outputs
Ground (0V)
Positive Supply Voltage
PIN DESCRIPTION (HCT541)
PIN No
1, 19
2, 3, 4, 5,
6, 7, 8, 9
18, 17, 16,
15, 14, 13,
11, 12
10
20
SYMBOL
G1, G2
A1 to A8
Y1 to Y8
GND
VCC
NAME AND FUNCTION
Output Enable Inputs
Data Inputs
Bus Outputs
Ground (0V)
Positive Supply Voltage
2/12


Part Number M54HCT540
Description OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT540: INVERTED - HCT541 NON INVERTED
Maker ST Microelectronics
Total Page 12 Pages
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Related Datasheet

1 M54HCT540 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT540: INVERTED - HCT541 NON INVERTED ST Microelectronics
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2 M54HCT541 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS HCT540: INVERTED - HCT541 NON INVERTED ST Microelectronics
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