STMICROELECTRONICS 74AC16541

74AC16541
16-BIT BUS BUFFER
WITH 3-STATE OUTPUTS (NON INVERTED)
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HIGH SPEED:
tPD = 4.5 ns (TYP.) at VCC = 5V
LOW POWER DISSIPATION:
ICC = 8 µA (MAX.) at TA=25°C
HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
POWER DOWN PROTECTION ON INPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24 mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
OPERATING VOLTAGE RANGE:
VCC(OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 16541
IMPROVED LATCH-UP IMMUNITY
TSSOP
ORDER CODES
PACKAGE
TSSOP
TUBE
T&R
74AC16541TTR
PIN CONNECTION
DESCRIPTION
The 74AC16541 is an advanced high-speed
CMOS 16-BIT BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer
metal wiring C2MOS 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
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74AC16541
INPUT AND OUTPUT EQUIVALENT CIRCUIT
IEC LOGIC SYMBOLS
PIN DESCRIPTION
PIN No
1, 48
2, 3, 5, 6, 8, 9,
11, 12
13, 14, 16, 17,
19, 20, 22, 23
24, 25
36, 35, 33, 32,
30, 29, 27, 26
47, 46, 44, 43,
41, 40, 38, 37
4, 10, 15, 21,
28, 34, 39, 45
7, 18, 31, 42
SYMBOL
NAME AND FUNCTION
1G1, 1G2 Output Enable Inputs
1Y1 to 1Y8 Data Outputs
2Y1 to 2Y8 Data Outputs
2G1, 2G2 Output Enable Inputs
2A1 to 2A8 Data Outputs
1A1 to 1A8 Data Outputs
GND
Ground (0V)
VCC
Positive Supply Voltage
TRUTH TABLE
INPUTS
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
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OUTPUT
74AC16541
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Supply Voltage
VI
DC Input Voltage
VO
DC Output Voltage
IIK
Value
Unit
-0.5 to +7.0
V
-0.5 to +7.0
V
-0.5 to VCC + 0.5
V
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 50
mA
IO
DC Output Current
ICC or IGND DC VCC or Ground Current
Tstg
Storage Temperature
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
VCC
Parameter
Supply Voltage
Value
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 (note 1) VCC = 3.0, 4.5 or 5.5
-55 to 125
0 to 8
°C
ns/V
1) VIN from 30% to 70% of VCC
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74AC16541
DC SPECIFICATIONS
Test Condition
Symbol
VIH
VIL
VOH
VOL
II
IOZ
ICC
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Leakage
Current
High Impedance
Output Leakage
Current
Quiescent Supply
Current
Value
TA = 25 °C
VCC
(V)
3.0
4.5
5.5
3.0
4.5
5.5
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
Unit
V
0.9
1.35
1.65
V
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
5.5
IO=-50 µA
5.4
5.49
5.4
5.4
3.0
IO=-12 mA
2.56
2.46
2.46
4.5
IO=-24 mA
3.86
3.76
3.76
5.5
IO=-24 mA
4.86
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
0.44
4.5
IO=24 mA
0.36
0.44
0.44
5.5
VI = VCC or GND
± 0.1
±1
±1
µA
5.5
VI = VIH or VIL
VO = VCC or GND
± 0.5
±5
±5
µA
5.5
VI = VCC or GND
8
80
80
µA
4.76
V
4.76
V
AC ELECTRICAL CHARACTERISTICS ( C L = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
Test Condition
Symbol
Parameter
VCC
(V)
CL
(pF)
Value
TA = 25°C
Min.
Typ.
Max.
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
Max.
tPLH tPHL Propagation Delay
Time
A to Y
tPZL tPZH Output Enable
Time
3.3(*)
6.3
7.5
9.5
9.5
5.0(**)
4.5
7.0
9.0
9.0
3.3(*)
8.5
10.0
12.0
12.0
5.0(**)
5.5
7.0
9.0
9.0
tPLZ tPHZ Output Disable
Time
3.3(*)
7.5
9.0
11.5
11.5
(**)
6.0
8.0
11.0
11.0
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
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5.0
Unit
ns
ns
ns
74AC16541
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
CIN
Input Capacitance
COUT
Output
Capacitance
Power Dissipation
Capacitance
(note 1)
CPD
TA = 25°C
VCC
(V)
5.0
Value
Min.
fIN = 10MHz
Typ.
Max.
7
10
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
Unit
Max.
10
10
pF
14
pF
25
pF
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/ 16
TEST CIRCUIT
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
tPZH, tPHZ
VCC
GND
CL = 50 pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500 Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
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74AC16541
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
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74AC16541
TSSOP48 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
1.2
A1
0.05
0.047
0.15
A2
MAX.
0.002
0.006
0.9
0.035
b
0.17
0.27
0.0067
0.011
c
0.09
0.20
0.0035
0.0079
D
12.4
12.6
0.488
0.496
E
8.1 BSC
E1
6.0
0.318 BSC
6.2
e
0.236
0.5 BSC
0.244
0.0197 BSC
K
0˚
8˚
0˚
8˚
L
0.50
0.75
0.020
0.030
A
A2
A1
b
K
e
L
E
c
D
E1
PIN 1 IDENTIFICATION
1
7065588C
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74AC16541
Tape & Reel TSSOP48 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
MAX.
MIN.
330
13.2
TYP.
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
8/9
TYP
0.504
30.4
0.519
1.197
Ao
8.7
8.9
0.343
0.350
Bo
13.1
13.3
0.516
0.524
Ko
1.5
1.7
0.059
0.067
Po
3.9
4.1
0.153
0.161
P
11.9
12.1
0.468
0.476
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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