74ACT16245TTR [STMICROELECTRONICS]
16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS (NON INVERTED); 具有三态输出的16位总线收发器（非反相）
| 型号： | 74ACT16245TTR |
| 厂家： | 
ST |
| 描述： | 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS (NON INVERTED) |
| 文件： | 总9页 (文件大小：251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74ACT16245
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS (NON INVERTED)
■
■
HIGH SPEED: t = 4.9ns (TYP.) at V = 5V
PD CC
LOW POWER DISSIPATION:
I
= 8µA(MAX.) at T =25°C
CC
A
■
■
■
■
■
COMPATIBLE WITH TTL OUTPUTS
= 2V (MIN.), V = 0.8V (MAX.)
50Ω TRANSMISSION LINE DRIVING
V
IH
IL
TSSOP
TUBE
CAPABILITY
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 24mA (MIN)
OH
OL
OPERATING VOLTAGE RANGE:
(OPR) = 4.5V to 5.5V
ORDER CODES
PACKAGE
V
CC
T & R
IMPROVED LATCH-UP IMMUNITY
TSSOP
74ACT16245TTR
DESCRIPTION
PIN CONNECTION
The 74ACT16245 is an advanced high-speed
CMOS 16-BIT BUS TRANSCEIVER (3-STATE)
fabricated with sub-micron silicon gate and
2
double-layer metal wiring C MOS technology.
This IC is intended for two-way asynchronous
communication between data buses and the
direction of data transmission is determined by
DIR input. The enable inputs G can be used to
disable the device so that the buses are effectively
isolated.
All floating bus terminals during the Z-state must
be held HIGH or LOW.
All inputs and outputs are equipped with protec-
tion circuits against static discharge, giving them
2KV ESD immunity and transient excess voltage.
July 2003
1/9
74ACT16245
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
IEC LOGIC SYMBOLS
PIN No
SYMBOL
NAME AND FUNCTION
1
1DIR
Directional Control
2, 3, 5, 6, 8, 9, 1B1 to 1B8 Data Inputs/Outputs
11, 12
13, 14, 16, 17, 2B1 to 2B8 Data Inputs/Outputs
19, 20, 22, 23
24
25
2DIR
2G
Directional Control
Output Enable Input
36, 35, 33, 32, 2A1 to 2A8 Data Inputs/Outputs
30, 29, 27, 26
47, 46, 44, 43, 1A1 to 1A8 Data Inputs/Outputs
41, 40, 38, 38
48
1G
Output Enable Input
4, 10, 15, 21,
28, 34, 39, 45
GND
Ground (0V)
V
7, 18, 31, 42
Positive Supply Voltage
CC
TRUTH TABLE
INPUTS
FUNCTION
OUTPUT
Yn
G
DIR
A BUS
B BUS
L
L
L
H
X
OUTPUT
INPUT
Z
INPUT
OUTPUT
Z
A = B
B = A
Z
H
X : Don‘t Care
Z : High Impedance
2/9
74ACT16245
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Supply Voltage
-0.5 to +7
V
CC
V
DC Input Voltage
-0.5 to V + 0.5
V
I
O
CC
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
± 20
mA
mA
mA
mA
°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)
°C
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
4.5 to 5.5
V
V
CC
V
Input Voltage
0 to V
I
CC
V
Output Voltage
0 to V
V
O
CC
T
Operating Temperature
-55 to 125
8
°C
ns/V
op
Input Rise and Fall Time V = 4.5 to 5.5V (note 1)
dt/dv
CC
1) V from 0.8V to 2.0V
IN
3/9
74ACT16245
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
4.5
5.5
4.5
5.5
4.5
5.5
V
V
= 0.1 V or
O
2.0
2.0
1.5
1.5
2.0
2.0
2.0
2.0
IH
V
-0.1V
V
V
CC
V
Low Level Input
Voltage
= 0.1 V or
O
1.5
0.8
0.8
0.8
0.8
0.8
0.8
IL
V
-0.1V
1.5
CC
V
High Level Output
Voltage
I =-50 µA
4.4
5.4
4.49
5.49
4.4
5.4
4.4
5.4
3.7
4.7
OH
O
I =-50 µA
O
I =-24 mA
4.5
5.5
4.5
5.5
4.5
5.5
3.86
4.86
3.76
4.76
O
I =-24 mA
O
V
Low Level Output
Voltage
I =50 µA
0.001 0.1
0.001 0.1
0.36
0.1
0.1
0.1
0.1
0.5
0.5
OL
O
V
I =50 µA
O
I =24 mA
0.44
0.44
O
I =24 mA
0.36
O
I
Input Leakage Cur-
rent
I
V = V or GND
5.5
± 0.1
± 1
± 1
µA
µA
I
CC
I
High Impedance
Output Leakage
Current
OZ
V = V or V
IIL
I
IH
5.5
± 0.5
± 5
± 10
V
= V or GND
CC
O
I
Max I /Input
V = V - 2.1V
I CC
5.5
5.5
0.6
1.5
80
1.6
mA
CCT
CC
I
Quiescent Supply
Current
CC
V = V or GND
8
160
µA
I
CC
I
V
= 1.65 V max
= 3.85 V min
75
50
mA
mA
OLD
OLD
Dynamic Output
Current (note 1, 2)
5.5
I
V
OHD
-75
-50
OHD
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
AC ELECTRICAL CHARACTERISTICS (C = 50 pF, R = 500 Ω, Input t = t = 3ns)
L
L
r
f
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)
t
Propagation Delay
Time
3.5
4.8
6.1
5.5
5.6
5.0
4.6
6.5
9.2
8.0
8.3
7.3
10.5
10.2
11.6
10.0
11.8
12.6
11.5
11.1
12.6
10.9
12.7
13.4
PLH
(*)
ns
ns
ns
5.0
5.0
5.0
t
PHL
t
Output Enable
Time
PZL
(*)
(*)
t
PZH
t
Output Disable-
Time
PLZ
t
PHZ
(*) Voltage range is 5.0V ± 0.5V
4/9
74ACT16245
CAPACITIVE CHARACTERISTICS
Test Condition
Value
-40 to 85°C -55 to 125°C Unit
T
= 25°C
Symbol
Parameter
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
C
Input Capacitance
I/O Capacitance
5.0
5.0
6
pF
pF
IN
C
14
I/O
C
Power Dissipation
Capacitance (note
1)
PD
f
= 10MHz
5.0
24
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
circuit)
= C x V x f + I /16 (per
PD CC IN CC
CC(opr)
TEST CIRCUIT
Test
Switch
t
t
t
t
Open
PLH, PHL
t
2V
CC
PZL, PLZ
t
GND
PZH, PHZ
C
R
R
= 50pF or equivalent (includes jig and probe capacitance)
L
L
T
= R = 500Ω or equivalent
1
= Z
of pulse generator (typically 50Ω)
OUT
5/9
74ACT16245
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
6/9
74ACT16245
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
74ACT16245
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
74ACT16245
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.
© The ST logo is a registered trademark of STMicroelectronics
© 2003 STMicroelectronics - Printed in Italy - All Rights Reserved
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9/9
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