STMICROELECTRONICS M74HCT540B1R

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
o
ICC = 4 µA (MAX.) at TA = 25 C
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
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
C1R
(Micro Package)
(Chip Carrier)
ORDER CODES :
M54HCTXXXF1R
M74HCTXXXM1R
M74HCTXXXB1R
M74HCTXXXC1R
DESCRIPTION
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
October 1993
HCT541
1/12
M54/M74HCT540/541
CHIP CARRIER
HCT540
HCT541
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION (HCT540)
PIN No
SYMBOL
1, 19
G1, G2
2, 3, 4, 5,
6, 7, 8, 9
18, 17, 16,
15, 14, 13,
11, 12
10
A1 to A8
Data Inputs
Y1 to Y8
Bus Outputs
GND
Ground (0V)
20
V CC
Positive Supply Voltage
2/12
NAME AND FUNCTION
Output Enable Inputs
PIN DESCRIPTION (HCT541)
PIN No
SYMBOL
1, 19
G1, G2
2, 3, 4, 5,
6, 7, 8, 9
18, 17, 16,
15, 14, 13,
11, 12
10
A1 to A8
Data Inputs
Y1 to Y8
Bus Outputs
GND
Ground (0V)
VCC
Positive Supply Voltage
20
NAME AND FUNCTION
Output Enable Inputs
M54/M74HCT540/541
IEC LOGIC SYMBOLS
HCT540
HCT541
TRUTH TABLE
INPUT
G1
H
X
OUTPUT
G2
X
H
An
X
X
Yn (HCT540)
Z
Z
Yn (HCT541)
Z
Z
L
L
L
L
H
L
H
L
H
L
X: ”H” or ”L”
Z: High impedance
CIRCUIT SCHEMATIC (Per Circuit)
HCT540
HCT541
3/12
M54/M74HCT540/541
ABSOLUTE MAXIMUM RATINGS
Symbol
Value
Unit
VCC
VI
Supply Voltage
DC Input Voltage
-0.5 to +7
-0.5 to VCC + 0.5
V
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
V
IIK
IOK
DC Input Diode Current
DC Output Diode Current
± 20
± 20
mA
mA
IO
DC Output Source Sink Current Per Output Pin
± 35
mA
DC VCC or Ground Current
± 70
mA
500 (*)
mW
ICC or IGND
Parameter
PD
Power Dissipation
Tstg
TL
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
o
o
C
C
Absolute Maximum Ratings are those values beyond which damage tothe device may occur. Functional operation under these conditions is not implied.
(*) 500 mW: ≅ 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Supply Voltage
VI
Input Voltage
VO
Top
Output Voltage
Operating Temperature: M54HC Series
M74HC Series
Input Rise and Fall Time (VCC = 4.5 to 5.5V)
tr, tf
4/12
Value
4.5 to 5.5
Unit
V
0 to VCC
V
0 to VCC
-55 to +125
-40 to +85
0 to 500
V
C
o
C
ns
o
M54/M74HCT540/541
DC SPECIFICATIONS
Test Conditions
Symbol
Parameter
VCC
(V)
VIH
High Level Input
Voltage
4.5
to
5.5
V IL
Low Level Input
Voltage
4.5
to
5.5
V OH
High Level
Output Voltage
VOL
II
IOZ
ICC
∆ICC
Low Level Output
Voltage
Input Leakage
Current
3 State Output
Off State Current
Quiescent Supply
Current
Additional worst
case supply
current
Value
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
2.0
-40 to 85 oC -55 to 125 oC
74HC
54HC
Min. Max. Min. Max.
2.0
0.8
4.5
VI = IO=-20 µA
VIH
or IO=-6.0 mA
V IL
4.5
VI = IO= 20 µA
VIH
or IO= 6.0 mA
V IL
2.0
0.8
V
0.8
4.4
4.5
4.4
4.4
4.18
4.31
4.13
4.10
Unit
V
V
0.0
0.1
0.1
0.1
0.17
0.26
0.33
0.4
VI = VCC or GND
±0.1
±1
±1
µA
VI = VIH or VIL
VO = VCC or GND
5.5 VI = VCC or GND
±0.5
±5
±10
µA
4
40
80
µA
5.5
2.0
2.9
3.0
mA
5.5
5.5
Per Input pin
VI = 0.5V or
V I = 2.4V
Other Inputs at
V CC or GND
V
5/12
M54/M74HCT540/541
AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns)
Test Conditions
TA = 25 oC
54HC and 74HC
Symbol
Parameter
VCC
(V)
CL
(pF)
tTLH
tTHL
tPLH
tPHL
Output Transition
Time
Propagation
Delay Time
(for HCT540)
4.5
50
Typ.
6
Max.
12
4.5
50
12
20
4.5
150
16
25
tPLH
tPHL
Propagation
Delay Time
(for HCT541)
4.5
4.5
50
150
14
18
tPZL
tPZH
Output Enable
Time
4.5
4.5
4.5
50
150
50
tPLZ
tPHZ
CIN
CPD (*)
Output Disable
Time
Input Capacitance
Power Dissipation
Capacitance
Min.
RL = 1KΩ
RL = 1KΩ
RL = 1KΩ
Value
-40 to 85 oC -55 to 125 oC
74HC
54HC
Min.
Max.
15
Min.
Unit
Max.
18
ns
25
30
ns
31
38
ns
23
28
29
35
35
42
ns
ns
18
22
19
30
34
27
38
43
34
45
51
41
ns
ns
ns
5
34
10
10
10
pF
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC/8 (per gate)
TEST CIRCUIT ICC (Opr.)
HCT540
6/12
M54/M74HCT540/541
SWITCHING CHARACTERISTICS TEST CIRCUIT
HCT540
HCT541
7/12
M54/M74HCT540/541
Plastic DIP20 (0.25) MECHANICAL DATA
mm
DIM.
MIN.
a1
0.254
B
1.39
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.010
1.65
0.055
0.065
b
0.45
0.018
b1
0.25
0.010
D
25.4
1.000
E
8.5
0.335
e
2.54
0.100
e3
22.86
0.900
F
7.1
0.280
I
3.93
0.155
L
Z
3.3
0.130
1.34
0.053
P001J
8/12
M54/M74HCT540/541
Ceramic DIP20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
inch
MAX.
MIN.
TYP.
MAX.
A
25
0.984
B
7.8
0.307
D
E
3.3
0.5
e3
0.130
1.78
0.020
22.86
0.070
0.900
F
2.29
2.79
0.090
0.110
G
0.4
0.55
0.016
0.022
I
1.27
1.52
0.050
0.060
L
0.22
0.31
0.009
0.012
M
0.51
1.27
0.020
0.050
N1
P
Q
4° (min.), 15° (max.)
7.9
8.13
5.71
0.311
0.320
0.225
P057H
9/12
M54/M74HCT540/541
SO20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
2.65
0.10
0.104
0.20
a2
MAX.
0.004
0.007
2.45
0.096
b
0.35
0.49
0.013
0.019
b1
0.23
0.32
0.009
0.012
C
0.50
0.020
c1
45° (typ.)
D
12.60
13.00
0.496
0.512
E
10.00
10.65
0.393
0.419
e
1.27
0.050
e3
11.43
0.450
F
7.40
7.60
0.291
0.299
L
0.50
1.27
0.19
0.050
M
S
0.75
0.029
8° (max.)
P013L
10/12
M54/M74HCT540/541
PLCC20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
inch
MAX.
MIN.
TYP.
MAX.
A
9.78
10.03
0.385
0.395
B
8.89
9.04
0.350
0.356
D
4.2
4.57
0.165
0.180
d1
2.54
0.100
d2
0.56
0.022
E
7.37
8.38
0.290
0.330
e
1.27
0.050
e3
5.08
0.200
F
0.38
0.015
G
0.101
0.004
M
1.27
0.050
M1
1.14
0.045
P027A
11/12
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. Specifications mentioned
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.
 1994 SGS-THOMSON Microelectronics - All Rights Reserved
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