M74HCT541B1R中文资料
M54HCT540/541M74HCT540/541
October 1993HCT540:INVERTED -HCT541NON INVERTED
OCTAL BUS BUFFER WITH 3STATE OUTPUTS B1R
(Plastic Package)ORDER CODES :
M54HCTXXXF1R M74HCTXXXM1R M74HCTXXXB1R M74HCTXXXC1R
F1R
(Ceramic Package)
M1R (Micro Package)C1R (Chip Carrier)
PIN CONNECTION (top view)
.HIGH SPEED
t PD =10ns (TYP.)at V CC =5V .LOW POWER DISSIPATION
I CC =4μA (MAX.)at T A =25o
C
.COMPATIBLE WITH TTL OUTPUTS V IH =2V (MIN.)V IL =0.8V (MAX.).OUTPUT DRIVE CAPABILITY 15LSTTL LOADS
.SYMMETRICAL OUTPUT IMPEDANCE |I OH |=I OL =6mA (MIN)
.BALANCED PROPAGATION DELAYS t PLH =t PHL
.
PIN AND FUNCTION COMPATIBLE WITH 54/74LS540/541
DESCRIPTION
The M54/74HCT540and HCT541are high speed CMOS OCTAL BUS BUFFERS (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 HCT540is an inverting buffer and HCT541is a non inverting buffer.
The 3STATE control gate operates as a two input AND such that if either G1and G2are high,all eight outputs are in the high impedance state.In order to enhance PC board layout,the HCT540and HCT541offers 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 54/74LSTTL logic families.M54/74HCT devices are designed to directly interface HSC 2MOS 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
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CHIP CARRIER
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION(HCT540)
PIN No SYMBOL NAME AND FUNCTION
1,19G1,G2Output Enable Inputs
2,3,4,5,
6,7,8,9
A1to A8Data Inputs
18,17,16,
15,14,13,
11,12
Y1to Y8Bus Outputs
10GND Ground(0V)
20V CC Positive Supply Voltage HCT541
HCT540
PIN DESCRIPTION(HCT541)
PIN No SYMBOL NAME AND FUNCTION
1,19G1,G2Output Enable Inputs
2,3,4,5,
6,7,8,9
A1to A8Data Inputs
18,17,16,
15,14,13,
11,12
Y1to Y8Bus Outputs
10GND Ground(0V)
20V CC Positive Supply Voltage M54/M74HCT540/541
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IEC LOGIC SYMBOLS
TRUTH TABLE
INPUT
OUTPUT
G1G2An Yn (HCT540)
Yn (HCT541)
H X X Z Z X H X Z
Z
L L H L H L
L
L
H
L
X:”H”or ”L”
Z:High impeda nce
CIRCUIT SCHEMATIC (Per Circuit)
HCT541
HCT540
HCT540
HCT541
M54/M74HCT540/541
3/12
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit V CC Supply Voltage-0.5to+7V V I DC Input Voltage-0.5to V CC+0.5V V O DC Output Voltage-0.5to V CC+0.5V
I IK DC Input Diode Current±20mA
I OK DC Output Diode Current±20mA
I O DC Output Source Sink Current Per Output Pin±35mA
I CC or I GND DC V CC or Ground Current±70mA
P D Power Dissipation500(*)mW T stg Storage Temperature-65to+150o C T L Lead Temperature(10sec)300o C Absolute Maximum Ratings arethose values beyond whichdamage tothe device may occu r.Functional ope ration under these conditions is not implied. (*)500mW:?65o C derate to300mW by10mW/o C:65o C to85o C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit V CC Supply Voltage 4.5to5.5V V I Input Voltage0to V CC V V O Output Voltage0to V CC V
T op Operating Temperature:M54HC Series
M74HC Series -55to+125
-40to+85
o C
o C
t r,t f Input Rise and Fall Time(V CC=4.5to5.5V)0to500ns M54/M74HCT540/541
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DC SPECIFICATIONS
Symbol Parameter
Test Conditions Value
Unit V CC
(V)
T A=25o C
54HC and74HC
-40to85o C
74HC
-55to125o C
54HC
Min.Typ.Max.Min.Max.Min.Max.
V IH High Level Input
Voltage 4.5
to
5.5
2.0 2.0 2.0V
V IL Low Level Input
Voltage 4.5
to
5.5
0.80.80.8V
V OH High Level
Output Voltage
4.5V I=
V IH
or
V IL
I O=-20μA 4.4 4.5 4.4 4.4
V
I O=-6.0mA 4.18 4.31 4.13 4.10
V OL Low Level Output
Voltage
4.5V I=
V IH
or
V IL
I O=20μA0.00.10.10.1
V
I O=6.0mA0.170.260.330.4
I I Input Leakage
Current 5.5
V I=V CC or GND±0.1±1±1μA
I OZ3State Output
Off State Current 5.5
V I=V IH or V IL
V O=V CC or GND
±0.5±5±10μA
I CC Quiescent Supply
Current
5.5V I=V CC or GND44080μA
?I CC Additional worst
case supply
current 5.5Per Input pin
V I=0.5V or
V I=2.4V
Other Inputs at
V CC or GND
2.0 2.9
3.0mA
M54/M74HCT540/541
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TEST CIRCUIT I CC (Opr.)
HCT540
AC ELECTRICAL CHARACTERISTICS (C L =50pF,Input t r =t f =6ns)
Symbol
Parameter
Test Conditions
Value
Unit
V CC (V)C L (pF)T A =25o
C 54HC and 74HC -40to 85o C 74HC -55to 125o C
54HC Min.
Typ.Max.Min.
Max.
Min.
Max.t TLH t THL Output Transition Time
4.5506121518ns t PLH t PHL Propagation Delay Time (for HCT540) 4.55012202530ns 4.515016253138ns t PLH t PHL Propagation Delay Time (for HCT541) 4.55014232935ns 4.515018283542ns t PZL t PZH Output Enable Time
4.550R L =1K ?18303845ns 4.5150R L =1K ?22344351ns t PLZ t PHZ Output Disable Time
4.5
50
R L =1K ?
19273441ns C IN Input Capacitance 510
10
10
pF C PD (*)
Power Dissipation Capacitance
34
pF
(*)C PD is defined as the value of the IC’s internal equivalent capac itanc e which is calculated from the operating current con sump tion without load.(Refer to Test Circuit).Average operting current can be obtained by the following equ ation.I CC (opr)=C PD ?V CC ?f IN +I CC /8(per gate)
M54/M74HCT540/541
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M54/M74HCT540/541 SWITCHING CHARACTERISTICS TEST CIRCUIT
HCT540
HCT541
7/12
M54/M74HCT540/541
Plastic DIP20(0.25)MECHANICAL DATA
mm inch DIM.
MIN.TYP.MAX.MIN.TYP.MAX.
a10.2540.010
B 1.39 1.650.0550.065
b0.450.018
b10.250.010
D25.4 1.000 E8.50.335
e 2.540.100
e322.860.900
F7.10.280
I 3.930.155
L 3.30.130
Z 1.340.053
P001J 8/12
M54/M74HCT540/541 Ceramic DIP20MECHANICAL DATA
mm inch
DIM.
MIN.TYP.MAX.MIN.TYP.MAX.
A250.984
B7.80.307
D 3.30.130
E0.5 1.780.0200.070
e322.860.900
F 2.29 2.790.0900.110
G0.40.550.0160.022
I 1.27 1.520.0500.060
L0.220.310.0090.012
M0.51 1.270.0200.050
N14°(min.),15°(max.)
P7.98.130.3110.320
Q 5.710.225
P057H
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M54/M74HCT540/541
SO20MECHANICAL DATA
mm inch DIM.
MIN.TYP.MAX.MIN.TYP.MAX.
A 2.650.104
a10.100.200.0040.007 a2 2.450.096 b0.350.490.0130.019 b10.230.320.0090.012 C0.500.020
c145°(typ.)
D12.6013.000.4960.512 E10.0010.650.3930.419
e 1.270.050
e311.430.450
F7.407.600.2910.299 L0.50 1.270.190.050 M0.750.029 S8°(max.)
P013L 10/12
M54/M74HCT540/541
PLCC20MECHANICAL DATA
mm inch
DIM.
MIN.TYP.MAX.MIN.TYP.MAX.
A9.7810.030.3850.395
B8.899.040.3500.356
D 4.2 4.570.1650.180
d1 2.540.100
d20.560.022
E7.378.380.2900.330
e 1.270.050
e3 5.080.200
F0.380.015
G0.1010.004
M 1.270.050
M1 1.140.045
P027A
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M54/M74HCT540/541
Information furnished is believed to be accurate and reliable.However,SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use.No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.Specificationsmentioned in this publication are subject to change without notice.This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics.
?1994SGS-THOMSON Microelectronics-All Rights Reserved
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