The UT54LVDSC032 receiver’s intended use is primarily in an
uncomplicated point-to-point configuration as is shown in
Figure 3. This configuration provides a clean signaling
environment for quick edge rates of the drivers. The receiver is
connected to the driver through a balanced media which may
be a standard twisted pair cable, a parallel pair cable, or simply
PCB traces. Typically, the characteristic impedance of the
media is in the range of 100Ω. A termination resistor of 100Ω
should be selected to match the media and is located as close to
the receiver input pins as possible. The termination resistor
converts the current sourced by the driver into voltages that are
detected by the receiver. Other configurations are possible such
as a multi-receiver configuration, but the effects of a mid-stream
connector(s), cable stub(s), and other impedance
discontinuities, as well as ground shifting, noise margin limits,
and total termination loading must be taken into account.
R
IN1-
R
IN1+
R
OUT1
EN
R
OUT2
R
IN2+
R
IN2-
V
SS
1
2
3
4
5
6
7
8
UT54LVDSC032
Receiver
16
15
14
13
12
11
10
9
V
DD
R
IN4-
R
IN4+
R
OUT4
EN
R
OUT3
R
IN3+
R
IN3-
Figure 2. UT54LVDSC032 Pinout
TRUTH TABLE
Enables
EN
L
EN
H
Input
R
IN+
- R
IN
-
X
V
ID
> 0.1V
V
ID
< -0.1V
Full Fail-safe
OPEN/SHORT or
Terminated
PIN DESCRIPTION
Pin No.
2, 6, 10, 14
1, 7, 9, 15
3, 5, 11, 13
4
12
16
8
Name
R
IN+
R
IN-
R
OUT
EN
EN
V
DD
V
SS
Description
Non-inverting receiver input pin
Inverting receiver input pin
Receiver output pin
Active high enable pin, OR-ed
with EN
Active low enable pin, OR-ed
with EN
Power supply pin, +5V + 10%
Ground pin
Output
R
OUT
Z
H
L
H
DATA
INPUT
ENABLE
RT 100Ω
1/4 UT54LVDSC032
+
-
DATA
OUTPUT
1/4 UT54LVDS031
All other combinations
of ENABLE inputs
Figure 3. Point-to-Point Application
The UT54LVDSC032 differential line receiver is capable of
detecting signals as low as 100mV, over a + 1V common-mode
range centered around +1.2V. This is related to the driver offset
voltage which is typically +1.2V. The driven signal is centered
around this voltage and may shift +1V around this center point.
The +1V shifting may be the result of a ground potential
difference between the driver’s ground reference and the
receiver’s ground reference, the common-mode effects of
coupled noise or a combination of the two. Both receiver input
pins should honor their specified operating input voltage range
of 0V to +2.4V (measured from each pin to ground).
2
Receiver Fail-Safe
The UT54LVDSC32 receiver is a high gain, high speed device
that amplifies a small differential signal (20mV) to TTL logic
levels. Due to the high gain and tight threshold of the receiver,
care should be taken to prevent noise from appearing as a valid
signal.
The receiver’s internal fail-safe circuitry is designed to source/
sink a small amount of current, providing fail-safe protection (a
stable known state of HIGH output voltage) for floating,
terminated or shorted receiver inputs.
1.
Open Input Pins.
The UT54LVDSC032 is a quad
receiver device, and if an application requires only 1, 2
or 3 receivers, the unused channel(s) inputs should be
left OPEN. Do not tie unused receiver inputs to ground
or any other voltages. The input is biased by internal high
value pull up and pull down resistors to set the output to
a HIGH state. This internal circuitry will guarantee a
HIGH, stable output state for open inputs.
2.
Terminated Input.
If the driver is disconnected (cable
unplugged), or if the driver is in a three-state or power-
off condition, the receiver output will again be in a HIGH
state, even with the end of cable 100Ω termination
resistor across the input pins. The unplugged cable can
become a floating antenna which can pick up noise. If
the cable picks up more than 10mV of differential noise,
the receiver may see the noise as a valid signal and
switch. To insure that any noise is seen as common-mode
and not differential, a balanced interconnect should be
used. Twisted pair cable offers better balance than flat
ribbon cable.
3.
Shorted Inputs.
If a fault condition occurs that shorts
the receiver inputs together, thus resulting in a 0V
differential input voltage, the receiver output remains in
a HIGH state. Shorted input fail-safe is not supported
across the common-mode range of the device (V
SS
to
2.4V). It is only supported with inputs shorted and no
external common-mode voltage applied.
3
OPERATIONAL ENVIRONMENT
PARAMETER
Total Ionizing Dose (TID)
Single Event Latchup (SEL)
Neutron Fluence
1
Notes:
1. Guarnteed but not tested.
LIMIT
1.0E6
>100
1.0E13
UNITS
rad(Si)
MeV-cm
2
/mg
n/cm
2
ABSOLUTE MAXIMUM RATINGS
1
(Referenced to V
SS
)
SYMBOL
V
DD
V
I/O4
PARAMETER
DC supply voltage
Voltage on any pin during operation
Voltage on LVDS inputs during cold spare
T
STG
P
D
T
J
Θ
JC
I
I
Storage temperature
Maximum power dissipation
Maximum junction temperature
2
Thermal resistance, junction-to-case
3
DC input current
LIMITS
-0.3V to 6.0V
-0.3V to (V
DD
+ 0.3V)
-0.3V to 6.0V
-65 to +150°C
1.25 W
+150°C
10°C/W
±
10mA
Notes:
1. Stresses outside the listed absolute maximum ratings may cause permanent damage to the device. This is a stress rating only, and functional operation of the device
at these or any other conditions beyond limits indicated in the operational sections of this specification is not recommended. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability and performance.
2. Maximum junction temperature may be increased to +175°C during burn-in and steady-static life.
3. Test per MIL-STD-883, Method 1012.
4. During cold spare, all pins except LVDS inputs should not exceed ±0.3V.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
DD
T
C
V
IN
PARAMETER
Positive supply voltage
Case temperature range
DC input voltage, receiver inputs
DC input voltage, logic inputs
LIMITS
4.5 to 5.5V
-55 to +125°C
2.4V
0 to V
DD
for EN, EN
4
DC ELECTRICAL CHARACTERISTICS *
1
(V
DD
= 5.0V +10%; -55°C < T
C
< +125°C); Unless otherwise noted, Tc is per the temperature range ordered
SYMBOL
V
IH
V
IL
V
OL
V
OH
I
IN
PARAMETER
High-level input voltage
Low-level input voltage
Low-level output voltage
High-level output voltage
Logic input leakage current
(TTL)
(TTL)
I
OL
= 2mA, V
DD
= 4.5V
I
OH
= -0.4mA, V
DD
= 4.5V
Inputs, V
IN
= 0 and 2.4V, V
CC
= 5.5
Enables = EN/EN= 0 and 5.5V,
V
CC
= 5.5
V
IN
=5.5V, V
DD
=V
SS
V
CM
= +1.2V
V
CM
= +1.2V
V
IN
= 2.4V
Disabled, V
OUT
= 0 V or V
DD
I
CL
= +/-18mA
Enabled, V
OUT
= 0 V
2
EN, EN = V
DD
or V
SS
Inputs Open
EN = V
SS
, EN = V
DD
Inputs Open
-100
-10
-10
-1.5
-15
+10
+10
1.5
-130
11
4.0
-10
-10
+10
+10
CONDITION
MIN
2.0
0.8
0.3
MAX
UNIT
V
V
V
V
μA
I
CSIN
V
TH3
V
TL3
I
I
I
OZ4
V
CL
I
OS3
I
CC4
I
CCZ4
Cold Spare Leakage LVDS Inputs
Differential Input High Threshold
Differential Input Low Threshold
Receiver input Current
Output Three-State Current
Input clamp voltage
Output Short Circuit Current
Loaded supply current receivers
enabled
Loaded supply current receivers
disabled
-10
+10
+100
μΑ
mV
mV
μΑ
μΑ
V
mA
mA
mA
11
Notes:
* For devices procured with a total ionizing dose tolerance guarantee, the post-irradiation performance is guaranteed at 25
o
C per MIL-STD-883 Method 1019, Condition
A up to the maximum TID level procured.
1. Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground.
2. Output short circuit current (I
OS
) is specified as magnitude only, minus sign indicates direction only. Only one output should be shorted at a time, do not exceed
[i=s] This post was last edited by dontium on 2015-1-23 13:36 [/i] I use the built-in AD of msp430f169, but the values sampled are all over 2000. No matter what the sampled voltage is, the value in th...
[i=s]This post was last edited by xiaxingxing on 2021-11-13 14:50[/i]As shown in the circuit diagram, there are the following questions:
1. When V1=1, the voltage of XMM1 is 9.981V and the voltage of ...
At least 24 AD channels are needed. I don't plan to use a selector. I'm working on Fiskars S08 CANbus. I don't know how the CAN of C8051F works, such as high speed and filter......
I. 5G advancement and industry applications1. What exactly is 5G? How is it different from 4G?According to the definition of the International Telecommunication Union (ITU), the basic technical indica...
Basic requirements: Design and manufacture LED electronic display screens and controllers.
1)Make a simple 24 -row *24 -column vertical LED electronic display and controller, expand the keyboard and c...
If the ultimate form of a car is a silicon-based life form, then in
the field of
intelligent driving
, it has gradually taken on the appearance of a "veteran driver." In
the field of
the ...[Details]
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[Details]
According to foreign media reports, researchers at the University of Surrey have developed an artificial intelligence system that can accurately locate the location of equipment in densely populate...[Details]
When discussing autonomous driving technology, there are often two extremes: on the one hand, there's the vision of "fully autonomous driving," while on the other, there's concern about potential s...[Details]
Keysight Technologies is combining its electromagnetic simulator with Synopsys' AI-driven RF design migration flow to create an integrated design flow for migrating from TSMC's N6RF+ process techno...[Details]
According to Nikkei, Japan has performed poorly in responding to China's power semiconductor challenges.
There are five major companies in Japan's power chip market: Mitsubishi Electric,...[Details]
Plessey Semiconductors has been acquired by Haylo Labs, which was established in March last year with a $100 million, five-year loan from Chinese technology company Goertek.
Haylo Labs w...[Details]
Chinese characters are extensive and profound, and there are many different names for ESD tubes. How many of them do you know?
As far as I know, ESD diodes are currently known as ESD p...[Details]
On August 22, the Wall Street Journal reported on the 21st local time that the new US government does not plan to acquire equity in semiconductor wafer foundry giant TSMC and Micron, one of the thr...[Details]
Magna's integrated in-cabin perception system fuses vision and millimeter-wave radar data to detect the presence of passengers, identify stranded children, monitor driver fatigue and vital signs, a...[Details]
HTTP is the abbreviation of Hypertext Transfer Protocol. It is an application protocol based on TCP/IP communication protocol used to transmit HTML and image files. It is an application-level objec...[Details]
Plug-in hybrid vehicles (PHEVs) utilize two powertrains. Their pure electric range is typically inferior to that of pure electric vehicles, often reaching less than half that. Currently, mainstream...[Details]
With the gradual popularization of new energy vehicles in recent years, more and more people have been able to access and purchase electric vehicles. The structure of electric vehicles is composed ...[Details]
Shanghai, China, August 21, 2025 –
Toshiba Electronic Devices & Storage Corporation (“Toshiba”) today announced the launch of the TLX9161T
, an automotive photorelay in a compact SO12L-T pa...[Details]
Introduction: In digital circuit calculations, there is no concept of decimal points. You know where the decimal is, but the circuit does not know where the decimal point is. Therefore, you need to...[Details]
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
