U74HCT245_15 [UTC]
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS;
| 型号： | U74HCT245_15 |
| 厂家： | 
Unisonic Technologies |
| 描述： | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS 输出元件 |
| 文件： | 总5页 (文件大小：186K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U74HCT245
CMOS IC
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SOP-20
DESCRIPTION
The U74HCT245 is designed for the asynchronous
communication
between
data
buses.
While
the
direction-control(DIR) is high, data transmits from the A bus to the
SSOP-20
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.
TSSOP-20
FEATURES
* Operate from 4.5V to 5.5V
* Typical tPD is 14ns at 5.5V
* Inputs are TTL Voltage Compatible
ORDERING INFORMATION
Ordering Number
Lead Free
Package
Packing
Halogen Free
U74HCT245L-P20-R
U74HCT245L-P20-T
U74HCT245L-R20-R
U74HCT245L-R20-T
U74HCT245L-S20-R
U74HCT245L-S20-T
U74HCT245G-P20-R
U74HCT245G-P20-T
U74HCT245G-R20-R
U74HCT245G-R20-T
U74HCT245G-S20-R
U74HCT245G-S20-T
TSSOP-20
TSSOP-20
SSOP-20
SSOP-20
SOP-20
Tape Reel
Tube
Tape Reel
Tube
Tape Reel
Tube
SOP-20
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
1 of 5
QW-R502-646.B
U74HCT245
CMOS IC
PIN CONFIGURATION
FUNCTION TABLE
INPUT
OE
FUNCTION
DIR
X
H
H
L
L
Isolation
Transmit data from A bus to B bus
Transmit data from B bus to A bus
L
Note: H: HIGH voltage level; L: LOW voltage level.
LOGIC DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
2 of 5
QW-R502-646.B
www.unisonic.com.tw
U74HCT245
CMOS IC
ABSOLUTE MAXIMUM RATING
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
Storage Temperature
±70
TSTG
-65 ~ +150
Notes: 1. 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.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are
observed.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VCC
MIN
4.5
0
TYP
5
MAX
5.5
UNIT
V
Supply Voltage
Input Voltage
Output Voltage
VIN
VCC
VCC
500
85
V
VOUT
tT
0
V
Input Transition Rise or Fall Rate
Operating Temperature
ns
°C
TOPR
-40
ELECTRICAL CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
VIH
TEST CONDITIONS
VCC=4.5V~5.5V
MIN
2.0
TYP
MAX UNIT
V
High-Level input voltage
Low-Level output voltage
1.6
1.2
VIL
VCC=4.5V~5.5V
0.8
V
V
VCC=4.5V, IOH=-20μA
VCC=4.5V, IOH=-6mA
VCC=4.5V, IOL=20μA
VCC=4.5V, IOH=6mA
4.4
4.499
4.3
High-Level Output Voltage
Low-Level Output Voltage
VOH
VOL
3.98
V
0.001
0.17
±0.1
0.1
V
0.26
±100
V
Input Current of DIR or
OE
II(LEAK) VCC=5.5V, VIN=VCC or GND
nA
μA
μA
Output OFF -state current
Quiescent Supply Current
IOZ
ICC
VCC=5.5V, VOUT=VCC or GND
±0.01 ±0.5
8
VCC=5.5V, VIN=VCC or GND, IOUT=0
V
CC=5.5V,One input at 0.5V or
Additional Quiescent Supply Current
ΔICC
1.4
3
2.4
10
mA
pF
2.4V,other inputs at 0 or VCC
VCC=5.5V, VIN=VCC or GND
Input Capacitance of DIR or
OE
CIN
UNISONIC TECHNOLOGIES CO., LTD
3 of 5
QW-R502-646.B
www.unisonic.com.tw
U74HCT245
CMOS IC
SWITCHING CHARACTERISTICS (TA=25°С, RL=1kΩ,unless otherwise specified)
CL=50pF
PARAMETER
SYMBOL
tPD
TEST CONDITIONS
VCC=4.5V
MIN
TYP
16
14
25
22
26
23
9
MAX UNIT
22
20
46
41
40
36
12
11
ns
ns
ns
ns
ns
ns
ns
ns
Propagation delay from input
(A or B) to output (B or A)
(tPLH/tPHL
)
)
)
VCC=5.5V
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
3-state output enable time from input
tEN
(tPZL/tPZH
(
) 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)
8
CL=150pF
PARAMETER
SYMBOL
tPD
TEST CONDITIONS
MIN
TYP
20
MAX UNIT
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
VCC=4.5V
VCC=5.5V
30
27
59
53
42
38
ns
ns
ns
ns
ns
ns
Propagation delay from input
(A or B) to output (B or A)
3-state output enable time from input
(tPLH/tPHL
)
18
36
tEN
(tPZL/tPZH
tT
(
) to output (A or B)
OE
)
30
17
Output transition time, (A or B)
(tR/tF)
14
OPERATING CHARACTERISTICS
PARAMETER
Power Dissipation Capacitance
SYMBOL
CPD
TEST CONDITIONS
No load
RATINGS
40
UNIT
pF
UNISONIC TECHNOLOGIES CO., LTD
4 of 5
QW-R502-646.B
www.unisonic.com.tw
U74HCT245
CMOS IC
TEST CIRCUIT AND WAVEFORMS
Note: CL includes probe and jig capacitance.
PRR ≤1MHz, ZO = 50Ω, tR ≤6ns, tF ≤6ns
3V
OE
B/A
B/A
1.3V
1.3V
0V
3V
0V
VCC
A/B
1.3V
1.3V
1.3V
1.3V
10%
VOL
VOH
0V
VOH
VOL
90%
B/A
1.3V
1.3V
Propagation Delay Times
Enable and Disable Times
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
5 of 5
QW-R502-646.B
www.unisonic.com.tw
相关型号：
©2020 ICPDF网 联系我们和版权申明