74AC16541 [STMICROELECTRONICS]
16-BIT BUS BUFFER WITH 3-STATE OUTPUTS (NON INVERTED); 具有三态输出的16位总线缓冲器（非反相）
| 型号： | 74AC16541 |
| 厂家： | 
ST |
| 描述： | 16-BIT BUS BUFFER WITH 3-STATE OUTPUTS (NON INVERTED) |
| 文件： | 总9页 (文件大小：236K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74AC16541
16-BIT BUS BUFFER
WITH 3-STATE OUTPUTS (NON INVERTED)
■
■
■
HIGH SPEED:
= 4.5 ns (TYP.) at V = 5V
t
PD
CC
LOW POWER DISSIPATION:
= 8 µA (MAX.) at T =25°C
I
CC
A
HIGH NOISE IMMUNITY:
= V = 28% V (MIN.)
V
NIH
NIL
CC
TSSOP
TUBE
■
■
POWER DOWN PROTECTION ON INPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 24 mA (MIN)
OH
OL
■
■
■
■
BALANCED PROPAGATION DELAYS:
ORDER CODES
PACKAGE
t
t
PLH
PHL
T & R
OPERATING VOLTAGE RANGE:
(OPR) = 2V to 6V
TSSOP
74AC16541TTR
V
CC
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 16541
IMPROVED LATCH-UP IMMUNITY
PIN CONNECTION
DESCRIPTION
The 74AC16541 is an advanced high-speed
CMOS 16-BIT BUS BUFFER (3-STATE) fabricat-
ed with sub-micron silicon gate and double-layer
2
metal wiring C MOS tecnology.
This is composed of two 8-bit sections with
separate output-enable signals. For either 8-bit
buffers section, the
3 STATE control gate
operates as a two input AND such that if either
nG1 and nG2 are high, all outputs are in the high
impedence state.
February 2003
1/9
74AC16541
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
IEC LOGIC SYMBOLS
PIN No
SYMBOL
NAME AND FUNCTION
1, 48
1G1, 1G2 Output Enable Inputs
2, 3, 5, 6, 8, 9, 1Y1 to 1Y8 Data Outputs
11, 12
13, 14, 16, 17, 2Y1 to 2Y8 Data Outputs
19, 20, 22, 23
24, 25
2G1, 2G2 Output Enable Inputs
36, 35, 33, 32, 2A1 to 2A8 Data Outputs
30, 29, 27, 26
47, 46, 44, 43, 1A1 to 1A8 Data Outputs
41, 40, 38, 37
4, 10, 15, 21,
28, 34, 39, 45
GND
Ground (0V)
7, 18, 31, 42
V
Positive Supply Voltage
CC
TRUTH TABLE
INPUTS
G2
OUTPUT
G1
An
Yn
H
X
L
X
H
L
X
X
H
L
Z
Z
H
L
L
L
X : Don’t Care
Z : High Impedance
2/9
74AC16541
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Supply Voltage
-0.5 to +7.0
-0.5 to +7.0
V
V
CC
V
DC Input Voltage
I
O
V
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
-0.5 to V + 0.5
V
CC
I
± 20
± 50
mA
mA
mA
mA
°C
°C
IK
I
OK
I
± 50
O
I
or I
T
DC V or Ground Current
± 400
CC
GND
CC
Storage Temperature
-65 to +150
300
stg
T
Lead Temperature (10 sec)
L
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
Parameter
Value
Unit
V
Supply Voltage
2 to 6
0 to V
V
V
CC
V
Input Voltage
I
CC
V
Output Voltage
0 to V
CC
V
O
T
Operating Temperature
-55 to 125
0 to 8
°C
ns/V
op
dt/dv
Input Rise and Fall Time (note 1) V = 3.0, 4.5 or 5.5
CC
1) V from 30% to 70% of V
IN
CC
3/9
74AC16541
DC SPECIFICATIONS
Test Condition
Value
T
= 25 °C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
V
High Level Input
Voltage
3.0
4.5
5.5
3.0
4.5
5.5
3.0
2.1
1.5
2.1
2.1
IH
V
V
= 0.1 V or
O
V
3.15 2.25
3.85 2.75
1.5
3.15
3.85
3.15
3.85
V
V
-0.1V
CC
V
Low Level Input
Voltage
0.9
0.9
0.9
IL
= 0.1 V or
O
V
2.25 1.35
2.75 1.65
2.99
1.35
1.65
1.35
1.65
-0.1V
CC
V
High Level Output
Voltage
I =-50 µA
2.9
4.4
2.9
4.4
2.9
4.4
OH
O
I =-50 µA
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
4.49
5.49
O
I =-50 µA
5.4
5.4
5.4
O
V
V
I =-12 mA
2.56
3.86
4.86
2.46
3.76
4.76
2.46
3.76
4.76
O
I =-24 mA
O
I =-24 mA
O
V
Low Level Output
Voltage
I =50 µA
0.002 0.1
0.001 0.1
0.001 0.1
0.36
0.1
0.1
0.1
0.1
OL
O
I =50 µA
O
I =50 µA
0.1
0.1
O
I =12 mA
0.44
0.44
0.44
0.44
O
I =24 mA
0.36
O
I
Input Leakage
Current
I
V = V or GND
5.5
5.5
5.5
± 0.1
± 0.5
8
± 1
± 5
80
± 1
± 5
80
µA
µA
µA
I
CC
I
High Impedance
Output Leakage
Current
OZ
V = V or V
IL
I
IH
V
= V or GND
CC
O
I
Quiescent Supply
Current
CC
V = V or GND
I
CC
AC ELECTRICAL CHARACTERISTICS ( C = 50 pF, R = 500 Ω, Input t = t = 3ns)
L
L
r
f
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
V
C
L
CC
(V) (pF)
Min. Typ. Max. Min. Max. Min. Max.
(*)
t
t
Propagation Delay
Time
A to Y
6.3
4.5
7.5
7.0
9.5
9.0
9.5
9.0
PLH PHL
3.3
ns
ns
ns
(**)
5.0
(*)
t
t
t
Output Enable
Time
8.5
5.5
7.5
6.0
10.0
7.0
9.0
8.0
12.0
9.0
12.0
9.0
PZL PZH
3.3
(**)
5.0
3.3
(*)
(**)
t
Output Disable
Time
11.5
11.0
11.5
11.0
PLZ PHZ
5.0
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
4/9
74AC16541
CAPACITIVE CHARACTERISTICS
Test Condition
Value
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
T
= 25°C
Symbol
Parameter
A
V
CC
(V)
C
Input Capacitance
7
10
10
10
pF
pF
IN
Output
Capacitance
C
14
OUT
C
Power Dissipation
Capacitance
(note 1)
PD
f
= 10MHz
5.0
25
pF
IN
1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
PD
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
= C x V x f + I / 16
CC(opr)
PD CC IN CC
TEST CIRCUIT
TEST
SWITCH
t
t
t
, t
Open
PLH PHL
, t
V
CC
PZL PLZ
, t
GND
PZH PHZ
C
L
R
L
R
T
= 50 pF or equivalent (includes jig and probe capacitance)
= R1 = 500 Ω or equivalent
= Z
of pulse generator (typically 50Ω)
OUT
5/9
74AC16541
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
6/9
74AC16541
TSSOP48 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
1.2
MIN.
MAX.
0.047
0.006
A
A1
A2
b
0.05
0.15
0.002
0.9
0.035
0.17
0.09
12.4
0.27
0.20
12.6
0.0067
0.0035
0.488
0.011
0.0079
0.496
c
D
E
8.1 BSC
0.5 BSC
0.318 BSC
E1
e
6.0
6.2
0.236
0.244
0.0197 BSC
K
0˚
8˚
0˚
8˚
L
0.50
0.75
0.020
0.030
A2
A
K
L
b
e
A1
E
c
D
E1
PIN 1 IDENTIFICATION
1
7065588C
7/9
74AC16541
Tape & Reel TSSOP48 MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
330
MIN.
MAX.
12.992
0.519
A
C
12.8
20.2
60
13.2
0.504
0.795
2.362
D
N
T
30.4
8.9
1.197
0.350
0.524
0.067
0.161
0.476
Ao
Bo
Ko
Po
P
8.7
13.1
1.5
0.343
0.516
0.059
0.153
0.468
13.3
1.7
3.9
4.1
11.9
12.1
8/9
74AC16541
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights 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 publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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9/9
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