74VHC16245 [STMICROELECTRONICS]
16-BIT BUS TRANSCEIVER; 16位总线收发器
| 型号： | 74VHC16245 |
| 厂家： | 
ST |
| 描述： | 16-BIT BUS TRANSCEIVER |
| 文件： | 总10页 (文件大小：252K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74VHC16245
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS (NON INVERTED)
■
■
HIGH SPEED: t = 4.0 ns (TYP.) at V = 5V
PD CC
LOW POWER DISSIPATION:
I
= 4 µA (MAX.) at T =25°C
CC
A
■
■
■
■
■
HIGH NOISE IMMUNITY
=V = 28% VCC (MIN.)
POWER DOWN PROTECTION ON INPUTS
& OUTPUTS
V
NIH
NIL
TSSOP
TUBE
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 8 mA (MIN)
OH
OL
BALANCED PROPAGATION DELAYS:
ORDER CODES
PACKAGE
t
t
PLH
PHL
T & R
OPERATING VOLTAGE RANGE:
(OPR) = 2V to 5.5V
TSSOP
74VHC16245TTR
V
CC
■
■
IMPROVED LATCH-UP IMMUNITY
LOW NOISE: V = 0.9V (MAX.)
PIN CONNECTION
OLP
DESCRIPTION
The 74VHC16245 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 busses; the
direction of data transmission is determined by
DIR input. The enable input G can be used to
disable the device so that the busses are
effectively isolated.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
July 2003
1/10
74VHC16245
INPUT EQUIVALENT CIRCUIT
IEC LOGIC SYMBOLS
PIN DESCRIPTION
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
H
X
OUTPUT
INPUT
Z
INPUT
OUTPUT
Z
A = B
B = A
Z
L
H
X : Don‘t Care
Z : High Impedance
2/10
74VHC16245
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 (DIR, G)
Bus I/O Voltage
I
V
-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
O
CC
I
I
- 20
± 20
mA
mA
mA
mA
°C
IK
OK
I
± 25
O
I
or I
T
DC V or Ground Current
± 75
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
2 to 5.5
0 to 5.5
V
V
CC
V
Input Voltage (DIR, G)
Bus I/O Voltage
I
V
0 to V
V
I/O
CC
V
Output Voltage
0 to V
V
O
CC
T
Operating Temperature
-55 to 125
°C
op
Input Rise and Fall Time (note 1) (V = 3.3 ± 0.3V)
0 to 100
0 to 20
CC
dt/dv
ns/V
(V = 5.0 ± 0.5V)
CC
1) V from 30% to 70% of V
IN
CC
3/10
74VHC16245
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
2.0
1.5
1.5
1.5
IH
V
V
3.0 to
5.5
0.7VCC
0.7VCC
0.7VCC
V
Low Level Input
Voltage
2.0
0.5
0.5
0.5
IL
3.0 to
5.5
0.3VCC
0.3VCC
0.3VCC
V
High Level Output
Voltage
I =-50 µA
2.0
3.0
4.5
3.0
4.5
2.0
3.0
4.5
3.0
4.5
1.9
2.9
2.0
3.0
4.5
1.9
2.9
1.9
2.9
4.4
2.4
3.7
OH
O
I =-50 µA
O
I =-50 µA
4.4
4.4
V
O
I =-4 mA
2.58
3.94
2.48
3.8
O
I =-8 mA
O
V
Low Level Output
Voltage
I =50 µA
0.0
0.0
0.0
0.1
0.1
0.1
0.1
0.1
0.1
OL
O
I =50 µA
O
I =50 µA
0.1
0.1
0.1
V
O
I =4 mA
0.36
0.36
0.44
0.44
0.55
0.55
O
I =8 mA
O
Ioz
High Impedance
Output Leakage
Current
V = V or V
IL
I
IH
5.5
±0.25
± 2.5
± 2.5
µA
V
= V or GND
CC
O
I
Input Leakage
Current
0 to
5.5
I
V = 5.5V or GND
± 0.1
± 1
± 1
µA
µA
I
I
Quiescent Supply
Current
CC
V = V or GND
5.5
4
40
40
I
CC
4/10
74VHC16245
AC ELECTRICAL CHARACTERISTICS (Input t = t = 3ns)
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
C
L
(V) (pF)
CC
(*)
t
t
Propagation Delay
Time
15
50
15
50
15
50
15
50
50
50
50
50
5.8
8.3
4.0
5.5
8.5
8.4
11.9
5.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
10.0
13.5
6.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
10.0
13.5
6.5
PLH
3.3
PHL
(*)
3.3
ns
ns
(**)
(**)
(*)
5.0
5.0
7.5
8.5
8.5
t
Output Disable
Time
R = 1KΩ
13.2
15.5
19.0
10.0
12.0
18.0
11.0
1.5
15.5
19.0
10.0
12.0
18.0
11.0
1.5
PZL
PZH
3.3
L
t
(*)
R = 1KΩ
11.0 16.7
3.3
L
(**)
(**)
(*)
R = 1KΩ
5.8
7.3
8.5
5.0
5.0
L
R = 1KΩ
10.6
L
t
t
R = 1KΩ
11.5 15.8
PLZ
3.3
L
Output Enable
Time
ns
ns
(**)
PHZ
R = 1KΩ
7.0
9.7
1.5
1.0
5.0
3.3
L
(*)
(**)
t
t
OSLH
OSHL
Output to Output
Skew time (note 1)
1.0
1.0
5.0
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
Note 1: Parameter guaranteed by design. t
= |t
- t
|, t
= |t
- t
|
soLH
pLHm pLHn soHL
pHLm pHLn
CAPACITIVE CHARACTERISTICS
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
Min. Typ. Max. Min. Max. Min. Max.
C
Input Capacitance
4
8
10
10
10
pF
pF
IN
Output
Capacitance
C
I/O
C
Power Dissipation
Capacitance
(note 1)
PD
21
pF
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 /8 (per circuit)
CC(opr)
PD CC IN CC
5/10
74VHC16245
DYNAMIC SWITCHING CHARACTERISTICS
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
Dynamic Low
Voltage Quiet
Output (note 1, 2)
0.6
0.9
OLP
5.0
V
V
V
V
-0.9
3.5
-0.6
OLV
Dynamic High
Voltage Input
(note 1, 3)
V
C = 50 pF
L
5.0
5.0
IHD
Dynamic Low
Voltage Input
(note 1, 3)
V
1.5
ILD
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (V ), 0V to threshold
ILD
(V ), f=1MHz.
IHD
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
=15/ 50pF or equivalent (includes jig and probe capacitance)
= R = 1KΩ or equivalent
1
= Z
of pulse generator (typically 50Ω
OUT
6/10
74VHC16245
WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)
7/10
74VHC16245
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
8/10
74VHC16245
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
9/10
74VHC16245
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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10/10
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