UTMC 5962RTBD02VYX, 5962RTBD02VYC, 5962RTBD02VYA, 5962RTBD02QYX, 5962RTBD02QYC Datasheet

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FEATURES

q >400.0 Mbps ( 200 MHz) switching rates
q +340mV differential signaling
q 3.3 V power supply
q TTL compatible outputs
q Cold spare all pins
q Nominal 105Ω Integrated Termination Resistor
q 3.3ns maximum propagation delay
q 0.35ns maximum differential skew
q Radiation-hardened design; total dose irradiation testing to

MIL-STD-883 Method 1019

- Total-dose: 300 krad(Si) and 1Mrad(Si)

- Latchup immune (LET > 100 MeV-cm2/mg)

q Packaging options:

- 16-lead flatpack (dual in-line)

q Standard Microcircuit Drawing TBD

- QML Q and V compliant part

q Compatible with IEEE 1596.3SCI LVDS
q Compatible with ANSI/TIA/EIA 644-1996 LVDS

Standard

INTRODUCTION

The UT54LVDS032LV Quad Receiver is a quad CMOS
differential line receiver designed for applications requiring
ultra low power dissipation and high data rates. The device is
designed to support data rates in excess of 400.0 Mbps (200
MHz) utilizing Low Voltage Differential Signaling (LVDS)
technology.

The UT54LVDS032LV accepts low voltage (340mV)
differential input signals and translates them to 5V TTL output
levels. The receiver supports a three-state function that may be
used to multiplex outputs. The receiver also supports OPEN,
shorted and terminated (100 Ω) input fail-safe. Receiver output
will be HIGH for all fail-safe conditions.

The UT54LVDS032LV and companion quad line driver
UT54LVDS031LV provides new alternatives to high power
pseudo-ECL devices for high speed point-to-point interface
applications.

All pins have Cold Spare buffers. These buffers will be high
impedance when VDD is tied to VSS.

An integrated termination resistor will reduce component count
and save board space.

+
R1

-

R

IN1+

R

IN1-

R

IN2+

R

IN2-

R

IN3+

R

IN3-

R

IN4+

R

IN4-

R

OUT1

R

OUT2

R

OUT4

R

OUT3

EN
EN

+
R2

-

+
R3

-

+
R4

-

Standard Products

UT54LVDS032LVT Low Voltage Quad Receiver with Integrated
Termination Resistor

Preliminary Data Sheet

February 14, 2003

Figure 1. UT54LVDS032LV Quad Receiver Block Diagram

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TRUTH TABLE

PIN DESCRIPTION

APPLICATIONS INFORMATION

The UT54LVDS032LVT 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. An integrated termination resistor of
105Ω is used to match the media . 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.

The UT54LVDS032LVT 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).

The integrated termination resistor is a nominal 105 Ω when VDD
is 3.0 to 3.6V. In cold spare mode, the integrated termination

resistor is 145Ω.

Enables Input Output

EN EN R

IN+

- RIN- R

OUT

L H X Z

All other combinations

of ENABLE inputs

VID > 0.1V H

VID < -0.1V L

Full Fail-safe

OPEN/SHORT or

Terminated

H

Pin No. Name Description

2, 6, 10, 14 R

IN+

Non-inverting receiver input pin

1, 7, 9, 15 R

IN-

Inverting receiver input pin

3, 5, 11, 13 R

OUT

Receiver output pin

4 EN Active high enable pin, OR-ed

with EN

12 EN Active low enable pin, OR-ed

with EN

16 V

DD

Power supply pin, +3.3 + 0.3V

8 V

SS

Ground pin

Figure 2. UT54LVDS032LVT Pinout

UT54LVDS032LV

Receiver

16
15

14

13
12

11

10

9

V

DD

R

IN4-

R

IN4+

R

OUT4

EN
R

OUT3

R

IN3+

R

IN3-

1

R

IN1-

2

R

IN1+

3

R

OUT1

4EN

5

R

OUT2

6

R

IN2+

7

R

IN2-

8

V

SS

ENABLE

DATA

INPUT

1/4 UT54LVDS031LV

1/4 UT54LVDS032LV

+

-

DATA

OUTPUT

Figure 3. Point-to-Point Application

RT 100 Ω

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PMENT

Receiver Fail-Safe

The UT54LVDS032LVT 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 UT54LVDS032LVT i s 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 100 Ω
integrated 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 (VSS to 2.4V). It is only supported with inputs

shorted and no external common-mode voltage
applied.

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ABSOLUTE MAXIMUM RATINGS

1

(Referenced to VSS)

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 life test.

3. Test per MIL-STD-883, Method 1012.

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER LIMITS

V

DD

DC supply voltage -0.3 to 4.0V

V

I/O

Voltage on any pin during operation -0.3 to (VDD + 0.3V)
Voltage on any pin during cold spare -.3 to 4.0V

T

STG

Storage temperature -65 to +150°C

P

D

Maximum power dissipation 1.25 W

T

J Maximum junction temperature

2

+150°C

Θ

JC Thermal resistance, junction-to-case

3

10°C/W

I

I

DC input current

±10mA

SYMBOL PARAMETER LIMITS

V

DD

Positive supply voltage 3.0 to 3.6V

T

C

Case temperature range -55 to +125°C

V

IN

DC input voltage, receiver inputs
DC input voltage, logic inputs

2.4V

0 to VDD for EN, EN