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參數(shù)資料
| 型號(hào)： | M54HCT540 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Octal Bus Buffer With 3-State Output(八總線緩沖器(三態(tài)輸出)) |
| 中文描述： | 八路總線緩沖器具有三態(tài)輸出（八總線緩沖器（三態(tài)輸出）） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 265K |
| 代理商： | M54HCT540 |
M54HCT540/541
M74HCT540/541
October 1993
HCT540: INVERTED - HCT541 NON INVERTED
LOWPOWER DISSIPATION
I
CC
= 4
μ
A(MAX.) at T
A
= 25
o
C
.
COMPATIBLE WITHTTL OUTPUTS
V
IH
= 2V (MIN.) V
IL
= 0.8V (MAX.)
.
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
.
SYMMETRICAL OUTPUT IMPEDANCE
|I
OH
| = I
OL
= 6 mA (MIN)
.
BALANCEDPROPAGATION DELAYS
t
PLH
= t
PHL
.
PIN ANDFUNCTION COMPATIBLE
WITH 54/74LS540/541
OCTAL BUS BUFFERWITH3 STATE OUTPUTS
B1R
(Plastic Package)
ORDER CODES :
M54HCTXXXF1R
M74HCTXXXB1R
M74HCTXXXM1R
M74HCTXXXC1R
F1R
(CeramicPackage)
M1R
(MicroPackage)
C1R
(Chip Carrier)
PIN CONNECTION
(top view)
.
HIGH SPEED
t
PD
= 10 ns(TYP.) at V
CC
= 5V
DESCRIPTION
The M54/74HCT540 and HCT541 are high speed
CMOS
OCTAL
BUS
fabricated in silicon gate C
2
MOS technology. They
have the same high speed performance of LSTTL
combined withtrue CMOS lowpower 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 ifeither G1 and G2 are high,all eight
outputs are in the highimpedance 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
BUFFERS
(3-STATE)
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 HSC
2
MOS 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.
HCT541
HCT540
1/12
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