U74HC245L-R20-R [UTC]
Bus Transceiver, HC/UH Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20, LEAD FREE, SSOP-20;
| 型号： | U74HC245L-R20-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Bus Transceiver, HC/UH Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20, LEAD FREE, SSOP-20 光电二极管 逻辑集成电路 |
| 文件： | 总5页 (文件大小：172K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U74HC245
CMOS IC
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SSOP-20
SOP-20
DESCRIPTION
The U74HC245 is designed for the asynchronous
communication
between
data
buses.
While
the
direction-control(DIR) is high, data transmits from the A bus to
the B bus. Data transmits from the B bus to the A bus if DIR is
low. The output-enable(
) will isolate the device from the
OE
buses when high voltage is applied on it.
FEATURES
* Operate from 2V to 6V
* Max tPD is 18ns at 6V
ORDERING INFORMATION
Ordering Number
Lead Free
Package
Packing
Halogen Free
U74HC245L-R20-R
U74HC245L-R20-T
U74HC245L-S20-R
U74HC245L-S20-T
U74HC245G-R20-R
U74HC245G-R20-T
U74HC245G-S20-R
U74HC245G-S20-T
SSOP-20
SSOP-20
SOP-20
SOP-20
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 5
QW-R502-639.B
U74HC245
CMOS IC
PIN CONFIGURATION
VCC
DIR
A1
A2
A3
A4
1
2
3
4
5
20
19
18
17
OE
B1
B2
B3
B4
B5
16
15
14
A5
A6
6
7
8
A7
13 B6
12 B7
A8
9
B8
11
GND
10
FUNCTION TABLE
INPUT
FUNCTION
OE
H
DIR
X
Isolation
L
H
Transmit data from A bus to B bus
Transmit data from B bus to A bus
L
L
Note: H: HIGH voltage level; L: LOW voltage level.
LOGIC DIAGRAM
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QW-R502-639.B
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U74HC245
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
VCC
RATINGS
-0.5~7.0
±20
UNIT
V
Supply Voltage
Input Clamp Current (ViN<0)
Output Clamp Current (VOUT<0)
Output Current
IIK
mA
mA
mA
mA
°C
IOK
±20
IOUT
ICC
±35
VCC or GND Current
±70
Storage Temperature
TSTG
-65 ~ +150
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
SYMBOL
VCC
TEST CONDITIONS
MIN TYP MAX UNIT
2
0
0
5
6
V
V
V
Input Voltage
VIN
VCC
VCC
Output Voltage
VOUT
VCC =2V
1000 ns
Input Transition Rise or Fall Rate
Operating Temperature
tR
VCC =4.5V
VCC =6V
500
400
85
ns
ns
°C
TOPR
-40
ELECTRICAL CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VCC=2V
1.5
3.15
4.2
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
High-level input voltage
Low-lever output voltage
VIH
VCC=4.5V
VCC=6V
VCC=2V
0.5
1.35
1.8
VIL
VCC=4.5V
VCC=6V
VCC=2V, IOH=-20μA
VCC=4.5V, IOH=-20μA
VCC=6V, IOH=-20μA
VCC=4.5V, IOH=-6mA
VCC=6V, IOH=-7.8mA
1.9 1.998
4.4 4.499
5.9 5.999
3.98 4.3
5.48 5.8
High-Level Output Voltage
Low-Level Output Voltage
VOH
VCC=2V, IOL=20μA
0.002 0.1
0.001 0.1
0.001 0.1
0.17 0.26
0.15 0.26
VCC=4.5V, IOL=20μA
VOL
VCC=6V, IOL=20μA
VCC=4.5V, IOH=6mA
VCC=6V, IOL=7.8mA
Input Current of DIR or
OE
II(LEAK)
IOZ
VCC=6V, VIN=VCC or GND
VCC=6V, VOUT=VCC or GND
VCC=6V, VIN=VCC or GND, IOUT=0
VCC=6V, VIN=VCC or GND
±0.1 ±100 nA
Output OFF-state current
Quiescent Supply Current
Input Capacitance of DIR or
±0.01 ±0.5 μA
IQ
8
μA
OE
CIN
3
10
pF
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U74HC245
CMOS IC
SWITCHING CHARACTERISTICS (TA=25°С,CL=50pF,RL=1kΩ,unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VCC=2V
40
15
12
105
21
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Propagation delay from input
(A or B) to output (B or A)
tPD
(tPLH/tPHL
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
)
)
)
18
125 230
3-state output enable time from input
tEN
(tPZL/tPZH
23
20
74
25
21
20
8
46
39
200
40
34
60
12
10
(
) to output (A or B)
OE
3-state output disable time from
input ( ) to output (A or B)
tDIS
(tPLZ/tPHZ
OE
tT
(tR/tF)
Output transition time, (A or B)
6
OPERATING CHARACTERISTICS
PARAMETER
Power Dissipation Capacitance
SYMBOL
CPD
TEST CONDITIONS
MIN TYP MAX UNIT
No load
40
pF
UNISONIC TECHNOLOGIES CO., LTD
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U74HC245
CMOS IC
TEST CIRCUIT AND WAVEFORMS
Note： CL includes probe and jig capacitance.
PRR ≤1MHz, ZO = 50Ω, tR ≤6ns, tF ≤6ns
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
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