U74LVC245G-D20-T [UTC]
OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS; 八路总线收发器与3态输出
| 型号： | U74LVC245G-D20-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS |
| 文件： | 总6页 (文件大小：196K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U74LVC245
CMOS IC
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
DESCRIPTION
The U74LVC245 is designed for the communication between data
buses asynchronously. 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(OE ) will isolate the
device from the buses when high voltage is applied on it.
FEATURES
* Operate From 1.65V to 3.6V
* Input Accept Voltages to 5.5V
* Partial-Power-Down Mode Operation
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
U74LVC245L-D20-T
U74LVC245L-P20-R
U74LVC245L-P20-T
U74LVC245L-S20-R
U74LVC245L-S20-T
U74LVC245G-D20-T
U74LVC245G-P20-R
U74LVC245G-P20-T
U74LVC245G-S20-R
U74LVC245G-S20-T
DIP-20
TSSOP-20
TSSOP-20
SOP-20
Tube
Tape Reel
Tube
Tape Reel
Tube
SOP-20
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Copyright © 2010 Unisonic Technologies Co., Ltd
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U74LVC245
CMOS IC
PIN CONFIGURATION
VCC
20
19 OE
1
2
DIR
A1
18
17
16
15
14
13
12
11
A2
3
B1
B2
B3
4
A3
A4
5
B4
B5
B6
B7
B8
6
A5
A6
7
8
A7
A8
9
10
GND
FUNCTION TABLE (each gate)
INPUT
FUNCTION
DIR
OE
H
L
×
H
L
Isolation
Transmit data from A bus to B bus
Transmit data from B bus to A bus
L
LOGIC DIAGRAM (positive logic)
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U74LVC245
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VCC
RATINGS
-0.5~6.5
-0.5~ 6.5
-0.5~6.5
-0.5~Vcc+0.5
-50
UNIT
V
Supply Voltage
Input Voltage
VIN
V
Voltage Applied To Output In High-Impedance or Power-off State
Voltage Applied to Output In High or Low State
Input Clamp Current
VOUT
V
IIK
IOK
IOUT
ICC
mA
mA
mA
mA
℃
Output Clamp Current
-50
Output Current
±50
Vcc or GND Current
±100
Storage Temperature
TSTG
-65 ~ +150
Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. 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
TEST CONDITIONS
Operating
MIN
1.65
1.5
TYP
MAX UNIT
3.6
V
VCC
Data retention only
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V
0.65*Vcc
1.7
Input Voltage High-Level
Input Voltage Low-Level
VIH
VIL
V
2
0.35*Vcc
V
0.7
0.8
5.5
Vcc
Input Voltage
VIN
0
0
V
V
Output Voltage
VOUT
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
VCC=1.65V to 3.6V, IOH = -100uA
VCC=1.65V, IOH= –4mA
VCC=2.3V, IOH = –8mA
MIN
Vcc-0.2
1.29
1.9
TYP MAX UNIT
Output Voltage High-Level
VOH
V
VCC=2.7V, IOH = –12mA
VCC=3V, IOH= –12mA
2.2
2.4
VCC=3V, IOH= –24mA
2.3
VCC=1.65V to 3.6V, IOL= 100uA
VCC=1.65V, IOL= 4mA
VCC=2.3V, IOL= 8mA
0.1
0.24
Output Voltage Low-Level
VOL
V
0.3
0.4
0.55
±1
VCC=2.7V, IOL= 12mA
VCC=3V, IOL= 24mA
Input Leakage Current
Power OFF Leakage Current
Input Leakage Current (For I/O
Ports)
II(LEAK) VCC=3.6V, VIN= 5.5 V or GND
uA
uA
IOFF
VCC =0V, VIN or VCC=5.5V
±1
IOZ
VCC=3.6V, VOUT= 0~5.5V
±1
uA
uA
VCC=3.6V,VIN =VCC or GND IOUT= 0
1
1
Quiescent Supply Current
IQ
VCC=3.6V, 3.6V≦VIN≦5.5V, IOUT=0
Additional Quiescent Supply
Current
V
CC=2.7V to 3.6V, One input at VCC
Δ IQ
500
uA
pF
-0.6V, Other inputs at VCC or GND
VCC=3.3V, VIN = VCC or GND
Input Capacitance
CIN
4
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U74LVC245
CMOS IC
SWITCHING CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
VCC=1.8V ± 0.15V
MIN
1
TYP MAX UNIT
6
12.2
7.8
7.1
6.1
14.8
10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
VCC=2.5V ± 0.2V
VCC=2.7V
1
3.9
4.2
3.8
7
From A to Y or From B to A
tPLH/tPHL
1
VCC=3.3V ± 0.3V
VCC=1.8V ± 0.15V
VCC=2.5V ± 0.2V
VCC=2.7V
1.5
1
1
4.5
5.4
4.4
7.8
4
tPZL/tPZH
From OE to A or B
1
9.3
8.3
16.5
9
VCC=3.3V ± 0.3V
1.5
1
VCC=1.8V ± 0.15V
VCC=2.5V ± 0.2V
VCC=2.7V
1
t
PLZ/tPHZ
OE A to A or B
From
1
4.4
4.1
8.3
7.3
VCC=3.3V ± 0.3V
1.7
OPERATING CHARACTERISTICS
PARAMETER
SYMBOL
Cpd
TEST CONDITIONS
OE =0, f=10MHZ, VCC=1.8V
OE =0, f=10MHZ, VCC=2.5V
OE =0, f=10MHZ, VCC=3.3V
OE =1, f=10MHZ, VCC=1.8V
OE =1, f=10MHZ, VCC=2.5V
OE =1, f=10MHZ, VCC=3.3V
MIN
TYP
42
MAX UNIT
pF
43
45
1
pF
pF
pF
pF
pF
Power Dissipation Capacitance
1
2
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U74LVC245
CMOS IC
TEST CIRCUIT AND WAVEFORMS
VEXT
tPZH/tPHZ
GND
V△
VCC
VIN
tR/tF
VM
CL
RL
t
PLH/tPHL
OPEN
OPEN
OPEN
OPEN
tPZL/tPLZ
2*VCC
2*VCC
6 V
1.8V ±0.15V
2.5V ±0.2V
2.7 V
VCC
VCC
≤2ns
≤2ns
VCC/2
VCC/2
1.5V
0.15V
0.15V
0.3V
30 PF
30 PF
50 PF
50 PF
1 KΩ
500Ω
500Ω
500Ω
GND
2.7 V
2.7 V
≤2.5ns
≤2.5ns
GND
3.3V ±0.3V
1.5V
0.3V
GND
6 V
Fig-1 Load circuitry
Fig-2 Propagation delay waves
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U74LVC245
CMOS IC
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.
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