The UT54ACTS245E is a non-inverting octal bus transceiver
designed for asynchronous two-way communication between
data buses. The control function implementation minimizes
external timing requirements.
The device allows data transmission from the A bus to the B
bus or from the B bus to the A bus depending upon the logic
level at the direction control (DIR) input. The enable input (G)
disables the device so that the buses are effectively isolated.
The device is characterized over full HiRel temperature range
of -55°C to +125°C.
FUNCTION TABLE
ENABLE
G
L
L
H
DIRECTION
CONTROL DIR
L
H
X
OPERATION
B Data To A Bus
A Data To B Bus
Isolation
PINOUTS
20-Lead Flatpack
Top View
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V
SS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
G
B1
B2
B3
B4
B5
B6
B7
B8
LOGIC SYMBOL
G
DIR
(19)
(1)
G3
3 EN1 (BA)
3 EN2 (AB)
(18)
1
2
(17)
(16)
(15)
(14)
B1
B2
B3
B4
A1
A2
A3
A4
A5
A6
A7
A8
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
B5
(13)
B6
(12)
B7
(11)
B8
Note:
1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
1
LOGIC DIAGRAM
DIR
(1)
(19)
G
A1
(2)
(18)
B1
A2
(3)
(17)
B2
A3
(4)
(16)
B3
A4
(5)
(15)
B4
A5
(6)
(14)
B5
A6
(7)
(13)
B6
A7
(8)
(12)
B7
A8
(9)
(11)
B8
2
OPERATIONAL ENVIRONMENT
1
PARAMETER
Total Dose
SEU Threshold
2
SEL Threshold
Neutron Fluence
LIMIT
1.0E6
108
120
1.0E14
UNITS
rads(Si)
MeV-cm
2
/mg
MeV-cm
2
/mg
n/cm
2
Notes:
1. Logic will not latchup during radiation exposure within the limits defined in the table.
2. Device storage elements are immune to SEU affects.
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
DD
V
I/O
T
STG
T
J
T
LS
Θ
JC
I
I
P
D2
PARAMETER
Supply voltage
Voltage any pin
Storage Temperature range
Maximum junction temperature
Lead temperature (soldering 5 seconds)
Thermal resistance junction to case
DC input current
Maximum package power dissipation
permitted @ Tc = +125
o
C
LIMIT
-0.3 to 6.0
-.3 to V
DD
+.3
-65 to +150
+175
+300
15
±10
3.3
UNITS
V
V
°C
°C
°C
°C/W
mA
W
Note:
1. Stresses outside the listed absolute maximum ratings may cause permanent damage to the device. This is a stress rating only, functional operation of the device at
these or any other conditions beyond limits indicated in the operational sections is not recommended. Exposure to absolute maximum rating conditions for extended
DC ELECTRICAL CHARACTERISTICS FOR THE UT54ACTS245E
7
( V
DD
= 3.0V to 5.5V; V
SS
= 0V
6
; -55°C < T
C
< +125°C)
SYMBOL
V
IL1
V
IL2
V
IH1
V
IH2
I
IN
V
OL1
DESCRIPTION
Low-level input voltage
1
Low-level input voltage
1
High-level input voltage
1
High-level input voltage
1
Input leakage current
Low-level output voltage
3
CONDITION
V
DD
from 4.5V to 5.5V
V
DD
from 3.0V to 3.6V
V
DD
from 4.5V to 5.5V
V
DD
from 3.0V to 3.6V
V
IN
= V
DD
or V
SS
I
OL
= 12mA
V
DD
= 4.5V to 5.5V
V
OL2
Low-level output voltage
3
I
OL
= 8mA
V
DD
= 3.0V to 3.6V
V
OH1
High-level output voltage
3
I
OH
= -12mA
V
DD
from 4.5V to 5.5V
V
OH2
High-level output voltage
3
I
OH
= -8mA
V
DD
from 3.0V to 3.6V
I
OS1
Short-circuit output current
2 ,4
V
O
= V
DD
and V
SS
V
DD
from 4.5V to 5.5V
I
OS2
Short-circuit output current
2 ,4
V
O
= V
DD
and V
SS
V
DD
from 3.0V to 3.6V
I
OL1
Low level output current
9
V
IN
= V
DD
or V
SS
V
OL
= 0.4V
V
DD
from 4.5V to 5.5V
I
OL2
Low level output current
9
V
IN
= V
DD
or V
SS
V
OL
= 0.4V
V
DD
from 3.0V to 3.6V
I
OH1
High level output current
9
V
IN
= V
DD
or V
SS
V
OH
= V
DD
-0.4V
V
DD
from 4.5V to 5.5V
I
OH2
High level output current
9
V
IN
= V
DD
or V
SS
V
OH
= V
DD
-0.4V
V
DD
from 3.0V to 3.6V
-8
mA
-12
mA
8
mA
12
mA
-200
200
mA
-300
300
mA
2.4
V
0.7 V
DD
V
0.4
V
0.5 V
DD
2.0
-1
1
0.4
MIN
MAX
0.8
0.8
UNIT
V
V
V
V
μA
V
4
I
OZH
Three-state output leakage cur-
rent, high
G = 5.5V; for all other inputs
V
IN
= V
DD
or V
SS;
V
OUT =
V
DD
V
DD
= 5.5V
30
μA
I
OZL
Three-state output leakage cur-
rent, low
G = 5.5V; for all other inputs
V
IN
= V
DD
or V
SS;
V
OUT =
V
SS
V
DD
= 5.5V
-30
μA
P
total1
Power dissipation
2, 8
C
L
= 50pF
V
DD
= 4.5V to 5.5V
1.5
mW/
MH
Z
mW/
MH
Z
μA
P
total2
Power dissipation
2, 8
C
L
= 50pF
V
DD
= 3.0V to 3.6V
.75
I
DDQ
ΔI
DDQ
Quiescent Supply Current
V
IN
= V
DD
or V
SS
V
DD
from 3.0V to 5.5V
10
Quiescent Supply Current
Delta
For input under test
V
IN
= V
DD
-2.1V
For all other inputs
V
IN
= V
DD
or V
SS
V
DD
= 5.5V
ƒ
= 1MHz, V
DD
= 0V
ƒ
= 1MHz, V
DD
= 0V
1.6
mA
C
IN
C
OUT
Input capacitance
5
Output capacitance
5
15
15
pF
pF
Notes:
1. Functional tests are conducted in accordance with MIL-STD-883 with the following input test conditions: V
IH
= V
IH
(min) + 20%, - 0%; V
IL
= V
IL
(max) + 0%, - 50%,
as specified herein, for TTL, CMOS, or Schmitt compatible inputs. Devices may be tested using any input voltage within the above specified range, but are guaranteed
to V
IH
(min) and V
IL
(max).
2. Supplied as a design limit but not guaranteed or tested.
3. Per MIL-PRF-38535, for current density
≤
5.0E5 amps/cm
2
, the maximum product of load capacitance (per output buffer) times frequency should not exceed 3,765
pF/MHz.
4. Not more than one output may be shorted at a time for maximum duration of one second.
5. Capacitance measured for initial qualification and when design changes may affect the value. Capacitance is measured between the designated terminal and V
SS
at
frequency of 1MHz and a signal amplitude of 50mV rms maximum.
6. Maximum allowable relative shift equals 50mV.
7. All specifications valid for the maximum radiation dose available for the respective device types.
8. Power does not include power contribution of any TTL output sink current.
9. Guaranteed by characterization, but not tested.
[p=25, 2, left][font=Tahoma,][color=#333333][font=微软雅黑, arial, verdana]“Why did you quit your last job?” is a question that daunts even the most confident job seeker. Whether your answer is simple or ...
Q: The Chinese translation of ASIC is Application Specific Integrated Circuit. Why is it called an embedded microprocessor? Is FPGA also an embedded microprocessor? I heard someone say that FPGA refer...
Questions about serial port sending blockage in S3C2440 platform WinCE5.0: I developed a software, using TQ's SKY2440 development board as a template, and using the BSP package ported from 4.2 to winc...
Let's make a development board! We can do it together. The analysis is as follows:To drive a 2.4-inch 320*240 TFT color LCD, you only need to use the IO port to simulate the LCD's 8-bit bus, which req...
[p=28, 2, left][color=rgb(51, 51, 51)][font=宋体]As the handheld device business continues to grow, the requirements for battery chargers continue to increase. To choose the right integrated circuit (IC...
Most of the houses we live in now are elevator buildings, mainly because it is more convenient to go up and down the stairs! It can also make life more comfortable. It even helps to increase the ad...[Details]
As more and more consumers purchase new energy vehicles, the safety of electric vehicles has become a major concern. This has been particularly prominent following a series of electric vehicle fire...[Details]
ISP devices, such as field programmable devices (FPGAs and CPLDs), do not require a programmer. Using programming kits provided by the device manufacturer, they employ a top-down modular design app...[Details]
On August 22, according to the Ministry of Industry and Information Technology's official website, my country's first mandatory national standard for the control of hazardous substances in electric...[Details]
Tires are a very important component for cars. They are related to the driving experience of the vehicle. We are almost inseparable from cars in our daily lives. For tires, according to the role of...[Details]
A pure sine wave inverter has a good output waveform with very low distortion, and its output waveform is essentially the same as the AC waveform of the mains power grid. In fact, the AC power prov...[Details]
Common methods for troubleshooting roller press bearing wear include repair welding, thermal spraying, brush plating, and scrapping and replacement. However, these methods are often subject to asse...[Details]
AI distributed rendering architecture improves mobile phone rendering capabilities, and game performance tests can check frame generation indicators in real time
Shanghai, China, Aug...[Details]
The power battery is a crucial component for vehicles, determining its lifespan and range. According to national regulations, when the capacity of an electric vehicle's power battery drops below 80...[Details]
The term "remote meter reading" literally emphasizes remoteness. But how far is remote? One kilometer? Two kilometers? Those aren't considered far at all. Currently, the longest distance for ...[Details]
Introduction
Currently, IoT-related applications, including those enabling furniture display panels, industrial control display panels, handheld devices, and facial recognition, are gradually s...[Details]
August 14, 2025 – Mouser Electronics, an authorized global distributor of electronic components and industrial automation products, is now
stocking the Vishay Semiconductors VEML6046X00 color s...[Details]
Organic light-emitting diodes (
OLEDs) offer numerous advantages, including inherent brightness, low power consumption, minimal thickness, short response time, high contrast, wide viewing angle...[Details]
In tunnel engineering, the efficient and stable operation of a roadheader (TBM) is crucial to project success. Faced with the harsh challenges posed by complex underground environments—high vibrati...[Details]
When testing mobile phones, it's important to understand possible interference signal sources and their effects on the phone's front end. This helps determine the receiver's sensitivity to RF inter...[Details]
Talking
京公网安备 11010802033920号
EEWORLD
