ETC 74AC541MTR

74AC541
OCTAL BUS BUFFER
WITH 3 STATE OUTPUTS (NON INVERTED)
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HIGH SPEED: tPD = 4ns (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
HIGH NOISE IMMUNITY:
VNIH = V NIL = 28 % VCC (MIN.)
50Ω TRANSMISSION LINE DRIVING
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 541
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74AC541 is an advanced high-speed CMOS
OCTAL BUS BUFFER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS tecnology.
The 3 STATE control gate operates as two inputs
AND such that if either G1 and G2 are high, all
eight outputs are in the high impedance state.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
74AC541B
74AC541M
T&R
74AC541MTR
74AC541TTR
In order to enhance PC board layout, the
74AC541 offers a pinout having inputs and
outputs on opposite sides of the package.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
April 2001
1/9
74AC541
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
1, 19
2, 3, 4, 5, 6,
7, 8, 9
18, 17, 16,
15, 14, 13,
12, 11
10
20
G1, G2
A1 to A8
Output Enable Inputs
Data Inputs
Y1 to Y8
Data Outputs
GND
VCC
NAME AND FUNCTION
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
OUTPUT
G1
G2
An
Yn
H
X
L
L
X
H
L
L
X
X
H
L
Z
Z
H
L
X : Don’t Care
Z : High Impedance
ABSOLUTE MAXIMUM RATINGS
Symbol
V CC
Parameter
Supply Voltage
Value
Unit
-0.5 to +7
V
VI
DC Input Voltage
-0.5 to VCC + 0.5
V
VO
DC Output Voltage
-0.5 to VCC + 0.5
± 20
V
mA
± 20
mA
IIK
DC Input Diode Current
IOK
DC Output Diode Current
IO
DC Output Current
ICC or IGND DC VCC or Ground Current
Storage Temperature
Tstg
TL
Lead Temperature (10 sec)
± 50
mA
± 400
mA
-65 to +150
°C
300
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
V CC
Parameter
Supply Voltage
Unit
2 to 6
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature
dt/dv
Input Rise and Fall Time VCC = 3.0, 4.5 or 5.5V (note 1)
1) VIN from 30% to 70% of VCC
2/9
Value
-55 to 125
°C
8
ns/V
74AC541
DC SPECIFICATIONS
Test Condition
Symbol
VIH
V IL
VOH
VOL
II
Ioz
ICC
IOLD
IOHD
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
Low Level Output
Voltage
TA = 25°C
VCC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
Value
VO = 0.1 V or
VCC-0.1V
Min.
Typ.
2.1
3.15
3.85
1.5
2.25
2.75
1.5
2.25
2.75
VO = 0.1 V or
VCC-0.1V
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
2.1
3.15
3.85
0.9
1.35
1.65
Max.
2.1
3.15
3.85
0.9
1.35
1.65
V
0.9
1.35
1.65
3.0
IO=-50 µA
2.9
2.99
2.9
2.9
4.5
IO=-50 µA
4.4
4.49
4.4
4.4
5.49
Unit
5.5
IO=-50 µA
5.4
5.4
5.4
3.0
IO =-12 mA
2.56
2.46
2.4
4.5
IO =-24 mA
3.86
3.76
3.7
5.5
IO =-24 mA
4.86
4.76
4.7
3.0
IO=50 µA
0.002
0.1
0.1
0.1
4.5
IO=50 µA
0.001
0.1
0.1
0.1
5.5
IO=50 µA
0.001
0.1
0.1
0.1
3.0
IO =12 mA
0.36
0.44
0.5
4.5
IO =24 mA
0.36
0.44
0.5
5.5
IO =24 mA
0.36
0.44
0.5
V
V
V
Input Leakage
Current
High Impedance
Output Leakege
Current
Quiescent Supply
Current
5.5
VI = VCC or GND
± 0.1
±1
±1
µA
5.5
VI = VIH or VIL
VO = VCC or GND
± 0.3
± 2.5
±5
µA
5.5
VI = VCC or GND
4
40
80
µA
Dynamic Output
Current (note 1, 2)
5.5
VOLD = 1.65 V max
75
50
mA
VOHD = 3.85 V min
-75
-50
mA
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50Ω
3/9
74AC541
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
Test Condition
Symbol
Parameter
tPLH tPHL Propagation Delay
Time
tPZL tPZH Output Enable
Time
tPLZ tPHZ Output Disable
Time
Value
TA = 25°C
VCC
(V)
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
(*)
1.5
5.0
8.0
1.5
9.0
1.5
9.0
(**)
5.0
1.5
4.0
6.5
1.5
7.0
1.5
7.0
3.3 (*)
1.5
7.0
10.5
1.5
11.5
1.5
11.5
5.0(**)
1.5
5.0
8.0
1.5
8.5
1.5
8.5
3.3 (*)
1.5
7.0
10.5
1.5
11.5
1.5
11.5
(**)
1.5
5.0
9.0
1.5
9.5
1.5
9.5
3.3
5.0
Unit
ns
ns
ns
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
CIN
Input Capacitance
C OUT
Output
Capacitance
Power Dissipation
Capacitance (note
1)
C PD
Value
TA = 25°C
VCC
(V)
Min.
Typ.
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
Unit
Max.
5.0
5
pF
5.0
11
pF
30
pF
5.0
fIN = 10MHz
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)
TEST CIRCUIT
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
2V CC
tPZH, tPHZ
Open
C L = 50pF or equivalent (includes jig and probe capacitance)
R L = R1 = 500Ω or equivalent
R T = ZOUT of pulse generator (typically 50Ω)
4/9
74AC541
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
5/9
74AC541
Plastic DIP-20 (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
6/9
74AC541
SO-20 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
7/9
74AC541
TSSOP20 MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
A
MIN.
TYP.
1.1
0.433
A1
0.05
0.10
0.15
0.002
0.004
0.006
A2
0.85
0.9
0.95
0.335
0.354
0.374
b
0.19
0.30
0.0075
0.0118
c
0.09
0.2
0.0035
0.0079
D
6.4
6.5
6.6
0.252
0.256
0.260
E
6.25
6.4
6.5
0.246
0.252
0.256
E1
4.3
4.4
4.48
0.169
0.173
0.176
e
0.65 BSC
0.0256 BSC
K
0o
4o
8o
0o
4o
8o
L
0.50
0.60
0.70
0.020
0.024
0.028
A
A2
A1
b
K
e
E1
PIN 1 IDENTIFICATION
1
L
E
c
D
8/9
MAX.
74AC541
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consequences of use of such information nor for any infringe ment of patents or other righ ts of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this pub lication are subject to change without notice. Thi s pub lication supersedes and replaces all information
previously supplied. STMicroelectronics prod ucts are not authori zed for use as critical components in life suppo rt devices or
systems without express written approval of STMicroelectronics.
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