Texas Instruments (TI) provides complete interface solutions that empower you to differentiate your products and accelerate time-to-market.
Our expertise in high-speed, mixed-signal circuits, system-on-a-chip integration and advanced product development processes ensures you will
eceive the silicon, support tools, software and technical documentation to create and deliver the best products on time and at competitive prices.
r
ncluded in this selection guide you will find design considerations, technical overviews, graphic representation of portfolios, parametric tables
I
nd resource information on the following families of devices:
a
LVDS: (p. 4) TIA/EIA-644A specification
d
esigned for differential transmission
delivering signaling rates into the Gbps range
and power in the mW range with low EMI to
the telecommunication and consumer markets.
xECL: (p. 4) Emitter coupled logic (xECL),
high-speed differential interface technology
designed for low jitter and skew.
CML: (p. 4) Current-mode logic (CML), high
speed differential interface technology.
M-LVDS: (p. 8) TIA/EIA-899 specification with
all the benefits of LVDS applicable to multipoint bus architecture in backplanes. Used
often for clock distribution, e.g. AdvancedTCA.
Digital Isolators: (p. 10) The new ISO72x
high-speed digital isolators use state-of-the-art
integrated capacitive coupling and silicondioxide isolation barrier to provide up to
150-Mbps signaling rate with only 1-ns jitter,
best-of-class noise immunity and high reliability.
RS-485/422: (p. 11) Robust TIA/EIA-485 and
TIA/ EIA-422 specifications specially designed
for harsh, industrial environments transmitting
a differential signal up to 50 Mbps or 1.2 km.
RS-232: (p. 13) TIA/EIA-232 specification
defining single-ended interface between data
terminal equipment (DTE) and data circuitterminating equipment (DCE).
UARTs: (p. 16) Universal Asynchronous
Receiver/T
nent of serial communication utilizing RS232,
RS485/422 or LVDS transceivers to transmit or
receive between remote devices performing
parallel
process and serial to parallel conversion in the
receive process.
CAN: (p. 18) Controller Area Network
(ISO11898) specification commonly used in
automotive and industrial applications describes
differential signaling at a rate up to 1 Mbps on
a 40-meter bus with multipoint topology.
ransmitters are the key logic compo
to serial conversion in the transmit
FlatLink™ 3G: (p. 19) A new family of serial-
i
zers and deserializers designed for mobile
phone displays.
SerDes: (p. 20) Serializers and deserializers
in the gigabit range designed to bridge large
numbers of data bits over a small number of
data lines in telecommunication applications.
DVI/PanelBus™: (p. 22) The Digital Visual
Interface Specification, DVI, is an industry
standard developed by the Digital Display
Working Group (DDWG) for high-speed digital
connection to digital displays. DVI uses
transition-minimized DC balanced (TMDS)
data signaling.
TMDS: (p. 24) Transition minimized differential
signaling is the electrical interface used by DVI
and HDMI.
USB Hub Controllers and Peripheral
Devices:
established to make connecting PCs, peripherals and consumer electronics flexible and easy.
The hub controller manages USB port connect/
disconnect activities and a peripheral controller
enables USB connectivity of a peripheral
device to either a host or hub.
USB Port Protection: (p. 26) Transient voltage
suppressor protects USB 1.1 devices from ESD
and electrical noise transients.
USB Power Managers: (p. 27)
like TPS204xA and TPS205xA, are designed to
-
meet all the USB 1.0 and 2.0 requirements for
current-limiting and power switching to reliably
control the power on the voltage bus.
PCI Express®: (p. 29)
flexible and cost-effective I/O interconnect.
PCI Bridges: (p. 33) A peripheral component
interconnect (PCI) bridge provides a highperformance connection path between either
two PCI buses or a PCI component and one or
more DSP devices.
(p. 25) The USB standard was
A robust, scalable,
TI products,
CardBus Power Switches: (p. 34) The
C
ardBus controller uses the card detect and
voltage sense pins to determine a PC card’s
voltage requirements and then directs the
PCMCIA power switch to enable the proper
voltages. Standard PC cards require that V
be switched between ground, 3.3 V, and 5 V,
while VPP is switched between ground, 3.3 V,
5 V, and 12 V. CardBay sockets have the standard requirements for VCC, but require ground,
3.3 V, and 5 V to VPP, and ground, 1.8 V, or 3.3
V to V
simply not need 12 V or VPP while still having
the standard requirements for V
consider the voltage requirements of the
application when selecting a PCMCIA
power switch.
1394: (p. 36) IEEE 1394 (FireWire®) high-speed
interconnection enables simple, low-cost,
high-bandwidth, real-time data connectivity
between computers, peripherals and consumer
electronics.
GTLP: (p. 39) Gunning transceiver logic plus
(GTLP) derived from the JEDEC JESD8-3 GTL
standard is a reduced-voltage-swing
technology designed for high-speed interface
between cards operating at LVTTL logic levels
and backplanes operating at GTLP signal levels.
VME: (p. 41)
64-bit, backplane architecture that is coordinated and controlled by VITA. VME is used
extensively in military
applications.
Clock Distribution Circuits: (p. 42)
TI offers both single-ended and differential
clock buffers that perform from below 200 MHz
up to 3.5 GHz in a variety of fan-out options. In
addition to simple option for customers needing
differential signals (LVPECL) and single-ended
signals (LVTTL/LVCMOS) from the same device.
signal timing event from its ideal position,
has become a priority for ensuring reliability
in high-speed data buses.
Skew — Excessive skew, the time delta
between the actual and expected arrival
LVDS Family of Products
time of a clock signal, can limit the maximum
bandwidth performance and lead to data
ampling errors. Low skew specifications
s
make high-speed interconnect devices
xcellent for signal buffering.
e
Power Consumption — Low-voltage
differential signaling (LVDS) offers a low-power
alternative to ECL and PECL devices. Currentmode drivers in LVDS produce a constant
current, which allows power consumption to
be relatively independent of frequency. The
constant current driver delivers about 3.5 mA
to a 100-W load.
Technical Information
• LVDS is based on the TIA/EIA-644A
standard conceived to provide a generalpurpose electrical-layer specification for
drivers and receivers connected in a
point-to-point or multidrop interface.
Resources For a complete list of resources (evaluation modules, data sheets and application notes), visit interface.ti.com
Literature
Number
Description
Application Notes
SLLA014ALow-Voltage Differential Signaling (LVDS) Design Notes (Rev. A)
SLLA030CReducing Electromagnetic Interference with LVDS (Rev. C)
SLLA031AUsing an LVDS Receiver with TIA/EIA-422 Data (Rev. A)
SLLA034A
SLLA038B
SLLA053BPerformance of LVDS with Different Cables (Rev. B)
SLLA054A
SLLA065
SLLA082BActive Fail-Safe in TI's LVDS Receivers (Rev. B)
SLLA100Increase Current Drive Using LVDS
SLLA101Interfacing Different Logic with LVDS Receivers
Slew Rate Control of L
Interface Circuits for TIA/EIA-644 (LVDS) (Rev. B)
L
A Comparison of LinBiCMOS and CMOS Process T
VDS Multidrop Connections (Rev
VDS Circuits (Rev
. A)
. A)
echnologies in L
VDS ICs
SLLA103LVPECL and LVDS Power Comparison
SLLA104Suggestions for L
VDS Connections
SLLA105DSP to DSP Link Using LVDS
SLLA107Live Insertion with Differential Interface Products
SLLA147Suitable LVDS Architectures
Supply voltage for all devices listed above is 3.3 V and temperature range is –40 to 85°C. New products are listed in bold red.
2
Automotive version available, temperature range of –40 to 125°CPreview products are listed in bold blue.
*Suggested resale price in U.S. dollars in quantities of 1,000.
Resources For a complete list of resources (evaluation modules, data sheets and application notes), visit interface.ti.com
Literature NumberDescription
Application Notes
SLLA106TIA/EIA-485 and M-LVDS, Power and Speed Comparison
SLLA088ATransmission at 200 Mbps in VME Card Cage Using LVDM (Rev. A)
SLLA108Introduction to M-LVDS (TIA/EIA-899)
SLLA121Interoperability of M-LVDS and BusLVDS
SLLA119Wired-Logic Signaling with M-LVDS
SLLA127M-LVDS Signaling Rate Versus Distance
SLLA067A
external magnetic fields to prevent data
corruption is a critical consideration for
industrial applications. 1E6 times higher
magnetic immunity than inductive couplers.
Signaling rate — TI offers digital isolators
with the highest signaling rates of up to
150 Mbps.
Jitter — To ensure signal integrity,
jitter reduction is a priority. ISO72xx products
offer the lowest jitter with 1-ns jitter at
150-Mbps PRBS NRZ data input.
Key Features
• 4000-V
••
UL 1577, IEC 60747-5-2
peak
isolation
(VDE 0884, Rev. 2)
••
IEC 61010-1 and CSA approved
••
50-kV/µs transient immunity
• Signaling rate 0 Mbps to 150 Mbps
••
Low propagation delay
••
Low pulse skew
(pulse-width distortion)
• Low-power sleep mode
• High-electromagnetic immunity
• Low-input current requirement of 10 µA
• Fail-safe output
T
echnical Information
he ISO72xx is a family of digital isolators
T
sing the industry’s first application of digital
u
capacitive isolation technology. Digital buffers
apacitively couple data signals through a
c
silicone-dioxide (SiO2) insulation barrier which
provides galvanic isolation of up to 4000 V.
The device receives digital inputs and provides
clean digital outputs while preventing noise
currents and/or excessive voltages from
entering the local ground.
Recently introduced alternative isolation
techniques that use magnetic coupling may
still share the deficiencies of the older optocoupler solutions such as a restricted operating
temperature along with new concerns such as
he absence of a fail-safe output, an inability to
t
operate with DC-only signals and concerns
associated with susceptibility to external
magnetic fields and operating life under highvoltage conditions. TI isolation solutions are
designed to eliminate such problems.
superset of RS-422. Compliance with the
TIA/EIA standard will ensure reliable data
communication in a variety of networks,
including Modbus, INTERBUS, PROFIBUS,
BACnet and a variety of proprietary protocols.
Robustness — RS-485 is a robust interface
standard for use in industrial environments.
It features a wide common mode range of
–7 V to 12 V. Parts from TI are available with
ESD protection up to 30 kV.
Reliability — Integrated fail-safe circuitry
protects the bus from interpreting noise as
valid data when short-circuit, open-circuit or
idle line fault conditions occur.
Speed and Distance — Low noise coupling
of differential signaling with twisted-pair
cabling and wide common-mode voltage
RS-485/422 Family of Products
range allows data exchange at signaling rates
of up to 50 Mbps or to distances of several
20 percent of the characteristic impedance
of the cable and can vary from 90 Ω to 120 Ω.
kilometers at lower rates.
Technical Information
Line Loading — RS-422 is capable of support-
ing one driver and up to 10 receivers on the bus
line. Standard RS-485 is capable of supporting
up to 32 unit loads or nodes on the bus line.
However, there are reduced unit load devices
available that can support up to 256 devices.
Termination — A multipoint bus architecture
requires termination at both ends of the bus
line. The termination resistors must be within
Resources F
Literature NumberDescription
Application Notes
SLLA036BInterface Circuits for TIA/EIA-485 (RS-485)
SLLA070C422 and 485 Standards Overview and System Configurations
SLLA112RS-485 for E-Meter Applications
SLLA177PROFIBUS Electrical-Layer Solutions
SLLA169Use Receiver Equalization to Extend RS-485 Data Communications
SLLA143RS-485 for Digital Motor Control Applications
Note: IBIS models are available at interface.ti.com
or a complete list of resources (evaluation modules, data sheets and application notes), visit interface.ti.com
• The main difference between RS-422 and
RS-485 is the multidrop and multipoint
bus architecture—that is, one driver to
many receivers and many drivers to many
receivers, respectively.
• Typical signaling rates and distances for
these standards are up to 10 Mbps or up
to 1.2 km. TI offers devices capable of
reaching signaling rates of up to 50 Mbps.
*Suggested resale price in U.S. dollars in quantities of 1,000.
5
Triple
Quad-Drivers
Quad-Receivers
E, REHVD113.3V Supply – Low-Speed Slew-Rate Control1015Short, Open, Idle2568-PDIP, 8-SOIC1.80
DE, REHVD103.3V Supply – High-Speed Signaling2515Short, Open, Idle648-PDIP, 8-SOIC1.85
DE, REHVD08Wide Supply Range: 3 to 5.5V1015Short, Open, Idle2568-PDIP, 8-SOIC1.90
D
E, REHVD3085ELow Power Mode, Optimized for Mid-Speed115Short, Open, Idle2568-PDIP, 8-SOIC, 8-MSOP0.90
DE, REHVD3088ELow Power Mode, Optimized for High-Speed1015Short, Open, Idle2568-PDIP, 8-SOIC, 8-MSOP1.00
DE, REHVD485EHalf Duplex Transceiver1015Open648-PDIP, 8-SOIC, 8-MSOP0.70
DE, REHVD1176PROFIBUS Transceiver, EN 501704010Short, Open, Idle1608-SOIC1.55
DE, REHVD22–20V to 25V Common Mode Operation0.516Short, Open, Idle2568-PDIP, 8-SOIC1.65
DE, REHVD21–20V to 25V Common Mode, 5Mbps516Short, Open, Idle2568-PDIP, 8-SOIC1.65
DE, REHVD20–20V to 25V Common Mode, 25Mbps2516Short, Open, Idle648-PDIP, 8-SOIC1.65
DE, REHVD23Receiver Equalization, 160 Meters at 25 Mbps2516Short, Open, Idle648-PDIP, 8-SOIC1.80
DE, REHVD24Receiver Equalization, 500 Meters at 3 Mbps316Short, Open, Idle2568-PDIP, 8-SOIC1.80
DE, REHVD07Strong Driver Outputs – Low Signal Rate116Short, Open, Idle2568-PDIP, 8-SOIC1.50
DE, REHVD06Strong Driver Outputs – Mid Signal Rate1016Short, Open, Idle2568-PDIP, 8-SOIC1.55
DE, REHVD05Strong Driver Outputs – Fast Signal Rate4016Short, Open, Idle648-PDIP, 8-SOIC1.60
DE, RELBC176Low Power102Open328-PDIP, 8-SOIC0.90
DE, RELBC176ALow Power, Fast Signaling, ESD Protection3012Open328-PDIP, 8-SOIC1.20
DE, RELBC184Transient Protection, IEC Air, Contact, Surge0.2530Open1288-PDIP, 8-SOIC1.30
DE, RELBC182IEC ESD Protection, Air and Contact Tests
DE, REALS176Fast Signaling, Skew: 15ns352Open328-SOIC1.26
DE, RE176BCost Effective102None328-PDIP, 8-SOIC, 8-SOP0.44
NoHVD303.3V Supply, no Enables, 25Mbps2515Short, Open, Idle648-SOIC1.80
NoHVD313.3V Supply, no Enables, 5Mbps515Short, Open, Idle2568-SOIC1.80
NoHVD323.3V Supply, no Enables, 1Mbps115Short, Open, Idle2568-SOIC1.80
NoHVD379Balanced Receivers, Ideal for Interbus25
DE, REHVD333.3V Supply, with Enables, 25Mbps2515Short, Open, Idle6414-SOIC1.85
DE, REHVD343.3V Supply, with Enables, 5Mbps515Short, Open, Idle25614-SOIC1.85
DE, REHVD353.3V Supply, with Enables, 1Mbps115
NoHVD50Strong Bus Outputs, no Enables, 25Mbps2515Short, Open, Idle648-SOIC1.70
NoHVD51Strong Bus Outputs, no Enables, 5Mbps515Short, Open, Idle2568-SOIC1.70
NoHVD52Strong Bus Outputs, no Enables, 1Mbps115Short, Open, Idle2568-SOIC1.70
NoHVD179Balanced Receivers, Ideal for Interbus2515None2568-SOIC1.85
NoLBC179Low Power, without Enable102Open328-PDIP, 8-SOIC0.85
No
DE, REHVD53Strong Bus Outputs, with Enables, 25Mbps2515Short, Open, Idle6414-SOIC1.60
DE, REHVD54Strong Bus Outputs, with Enables, 5Mbps515Short, Open, Idle25614-SOIC1.60
DE, REHVD55Strong Bus Outputs, with Enables, 1Mbps115Short, Open, Idle25614-SOIC1.60
DE, RE
DE, REALS180High Signaling Rate, with Enables252Open3214-SOIC1.71
DE, REALS1177Dual full-duplex drivers/receivers102Open3216-PDIP, 16-SOIC3.24
1DE, 2DE
riple RE
DE, T
ComplementaryLBC172AHigh Signaling Rate, High ESD3013—3216-PDIP, 16-SOIC, 20-SOIC2.40
T
level IEC61000-4-2 electrostatic discharge
(ESD) protection. This protection makes the
RS-232 interface immune to damage from
ESD strikes that may occur while the system
is up and running, such as when a connection
to the RS-232 cable is made. These devices
are drop-in replacements and are functionally
identical to the existing industry-standard
solutions, providing a seamless transition in
the qualification process. These devices meet
the requirements for low-power, high-speed
applications such as portable/consumer,
telecom and computing equipment.
TI offers these new devices in the NiPdAu
Pb-Free finish, which eliminates tin whiskers
that might compromise long-term system reliability. TI offers the space-saving QFN package on select devices in addition to its
already extensive RS-232 portfolio.
Key Features
• No external ESD device needed with
these system-level ESD ratings:
– ±15-kV human-body model (HBM)
– ±8-kV IEC61000-4-2, contact
discharge
– ±15-kV IEC61000-4-2, air-gap
discharge
• Improved drop-in replacement of
popular RS-232 devices
• Data rates meet or exceed today’s
high-speed-application requirements
• Flexible power-saving options enable
longer battery life
• Wide portfolio permits selection of the
right form, fit and functionality
• Industry-leading interface product
space with assured source of supply
• Space-saving QFN package options for
portable applications
pplications
A
• The three-driver, five-receiver MAX3243E
is most popular in applications like PCs,
notebooks and servers.
• The MAX3238E/37E offer
complementary five-driver, threereceiver solutions. These two devices
are popular in PC peripheral
applications like data cables, printers,
modems, industrial control, etc.
• The MAX3227E/23E/22E/21E are
popular in portable handheld
applications due to their reduced bit
count, package size and low power
consumption.
• Higher-speed versions like the
SNx5C3232E/23E/22E/21E meet today’s
higher throughput needs through the
serial interface.
• The MAX232E and MAX213 provide a
higher noise margin for more rugged
environments such as industrial control.
Personal video recorder application block diagram.