News Room : logic

TI's New Auto-Direction Voltage-Level Translation Devices Improve Connectivity Between Next-Generation Processors and Peripherals

NewsCenter — Tue, 19 Dec 2006 08:00:00 GMT

DALLAS (December 19, 2006) -- Texas Instruments Incorporated (TI) (NYSE: TXN) announced today the release of two new bi-directional voltage-level translation devices, TXB0104 and TXS0104E, that improve connectivity between next-generation processors and peripheral devices. Eliminating the requirement for direction control signals used by traditional voltage-level translation devices, designers are able to decrease the complexity of control software and save valuable GPIOs on core processors.

The TXB0104, a 4-bit bidirectional voltage-level translator, provides universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V nodes. Vcca accepts any supply voltage from 1.2-V to 3.6-V. The B port is designed to track Vccb. Vccb accepts any supply voltage from 1.65-V to 5.5-V. This device is suitable for applications such as SD card interface via SD 1-bit mode or SPI mode.
For open drain applications, such as I2C or MMC card interface (initialization mode), TI's new TXS0104E, 4-bit bidirectional voltage-level translator, contains integrated pull-up resistors saving valuable board real estate and total system cost. The TXS0104E uses two separate configurable power-supply rails. The A port is designed to track Vcca. Vcca accepts any supply voltage from 1.65-V to 3.6-V; Vcca must be less than or equal to Vccb. The B port is designed to track Vccb. Vccb accepts any supply voltage from 2.3-V to 5.5-V. This allows for low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.

Key Features

+ 15kV ESD protection on the B-port
Vcc Isolation Feature
OE Input Circuit Referenced to Vcca
Low Power Consumption, 4-µA Max Icc
Ioff Supports Partial-Power-Down Mode Operation
No Power-Supply Sequencing Required - Vcca or Vccb Can Be Ramped First

Packaging, Pricing, and Availability

The TXB0104 and TXS0104E are offered in traditional SOIC (D), TSSOP (PW) and QFN (RGY) packages, as well as the space saving 12-ball BGA (ZXU) package. Both devices are available to sample in all package options. Budgetary pricing for the TXB0104ZXUR is set at $1.21 in quantities of 1,000. Budgetary pricing for the TXS0104EZXUR is set at $1.41 in quantities of 1,000.

Celestica Recognizes Texas Instruments with Third-Year Global Supplier Award

NewsCenter — Tue, 24 Oct 2006 09:00:00 GMT

DALLAS (Oct. 24, 2006) -- Texas Instruments Incorporated (TI) (NYSE: TXN) today announced it has been awarded a third-year Partners in Performance award by Celestica, a world leader in electronics manufacturing services (EMS). The awards are given annually to Celestica's suppliers, in recognition of their excellence in customer service and their support of Celestica's global supply chain.
"Texas Instruments is proud to be recognized by Celestica," said Steve Kelley, vice president of the standard linear and logic business unit for Texas Instruments. "At TI, we are always striving to provide our customers the resources they need to be the best in the market, whether that be through innovative analog products, applications expertise, technical support or flexible supply-chain programs."
The 2005 Partners in Performance winners demonstrated a level of responsiveness, flexibility and service that contributed to the success of Celestica's business and positively impacted its customers.
"In today's competitive business environment, the agility of our global supply chain is key to our success," said John Boucher, Chief Supply Chain and Procurement Officer, Celestica. "As a three-year Partners in Performance award recipient, Texas Instruments' commitment to flexibility and responsiveness helped support Celestica's success."

TI Continues Growth in the I2C™ Market with the Addition of Three Four-Channel I2C and SMBus™ Multiplexers and Switches

NewsCenter — Fri, 17 Feb 2006 08:00:00 GMT

DALLAS (Feb. 17, 2006) - Texas Instruments Incorporated (TI) (NYSE: TXN) today announced the release of three new four-bit bidirectional translating (level-shifting) I2C and SMBus multiplexers and switches. The PCA9544A, PCA9545A and PCA9546A support voltage level translation between 2.5V, 3.3V and 5V buses, which is essential in mixed voltage I2C systems. (See: www.ti.com/i2c.)

As the popular I2C two-wire communication bus standard continues to be adopted in many system applications, including computing and portable electronics, it is important to have I2C- and SMBus-compatible multiplexers and switches that can support the mixed voltage I2C systems. Controlled via the I2C bus, TI's new four-channel bidirectional switches support voltage interface between 2.5V, 3.3V and 5V buses. Each upstream channel (SCL/SDA) fans out to four downstream channels where each individual SCn/SDn channel or combination of channels can be selected through the contents of the programmable control register. This type of internal architecture allows designers to isolate a section of the I2C bus through I2C software, which provides pin savings in the processor. These free pins on the processor can now be used for other functions. These I2C switches and multiplexers can also be used to resolve I2C address conflicts. These devices also support standard- and fast-mode speeds.
Of these three devices, the PCA9545A has the highest feature set. All four channels in this device can be selected at the same time, providing for more design flexibility. This device offers an interrupt output and reset input along with a low on-state resistance (Ron=10 ohms), improving signal degradation between the input and output channels. All three devices are useful for a range of applications, including system monitoring in both telecom and computing.

Additional Multiplexer Features

Low RON switches (10 ohm typically)
Vcc range of 2.3V to 5.5V
Interface with 400 kbit/s Fast I2C Bus
Low power consumption
Ultra-small QFN package
All packages are lead(Pb)-free (NiPdAu finish)

Packaging, Pricing, and Availability

All three devices are available now with free samples support. The PCA9544A, PCA9545A and PCA9546A are available in the industry standard 20-pin SSOP, TSSOP, SOIC, and TVSOP packages along with the space-saving Quad Flat Pack (QFN) and Ball Grid Array (BGA) package options. Budgetary pricing for the PCA9544ADGVR and PCA9545ADGVR (TVSOP) is set at $2.75 in quantities of 1,000. Budgetary pricing for the PCA9546ADGVR (TVSOP) is set at $1.74 in quantities of 1,000.

These new devices join other I2C devices in the Standard Linear and Logic Must Have (www.ti.com/musthave) product offerings. TI's Must Have products are a select group of Standard Linear and Logic products that provide a focused priority for the customer.

Texas Instruments Dual Supply Level Translation Transceivers Offer Full Bit Width Flexibility

NewsCenter — Thu, 04 Dec 2003 08:00:00 GMT

New 1, 2, 8, and 20 Bit Translation Devices Create Design Flexibility by Offering Level Translation from 1.65V to 5.5V and 1.4V to 3.6V

DALLAS (December 4, 2003) - Ideal for interfacing devices operating at different voltage nodes, Texas Instruments (TI) (NYSE: TXN) announced today the addition of four new dual-supply level translation transceivers to its portfolio of translation products, the SN74LVC1T45, SN74LVC2T45, SN74AVC8T245, and the SN74AVC20T245. Useful in portable consumer, networking, datacom, and computing applications, these devices allow flexible bi-directional level translation between 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. (See www.ti.com/tran.)

Mismatched I/O voltages between microprocessors and peripheral devices continue to occur as microprocessor I/O voltages migrate to lower nodes and peripherals maintain higher voltage nodes. TI's new dual-supply level translation devices allow for communication between two devices that have such dissimilar interface voltages, while maintaining signal integrity and speed. These devices also offer full configurability with each rail being configurable from 1.4V to 3.6V in the AVC technology and 1.65V to 5.5V in the LVC technology.
The AVC translators feature 12mA current drive and fast propagation delays of 3.5ns (typ) when translating from 1.8V to 3.3V. Translators in the LVC technology have a max drive strength of 32mA and propagation delays of 4ns (typ) when translating from 3.3V to 5V.

Applications

These devices add further bit width flexibility to TI´s Dual-Supply Level Translation portfolio that now provides options from a single bit to 32 bits. The new 6-pin LVC1T45 and 8-pin LVC2T45 transceivers simplify routing by allowing designers to place a single or a dual translator on the board rather than routing through a higher bit-width device. These transceivers are extremely useful for level shifting control signals from general purpose I/O´s.

LCD applications commonly require 20-bits, and TI offers an integrated solution for this product space. TI's new AVC20T245 is ideal in situations where 16 data bits and 4 control bits are needing translation. Today this is commonly implemented using two 16-bit devices, resulting in 12 unused pins. For applications where 24 or 28 bits are necessary, the new AVC8T245 can be combined with TI's existing 16-bit AVC translators or the new AVC20T245.

Pricing, Support, and Availability

Initial budgetary pricing for these devices range from $0.40 to $2.50 per 1KU. All four devices are currently sampling along with other TI Dual-Supply Level Translation devices. The chart below details packaging options and budgetary pricing per 1K reel.

Three New Bus Switch Families from Texas Instruments Enhance Performance of Datacom and Networking Equipment, and Optimize Next-Generation Portable Computing and Communications Designs

NewsCenter — Tue, 22 Jul 2003 07:00:00 GMT

CB3T - Industry´s only Bus Switches supporting 5V / 3.3V to 2.5V level translation
CB3Q - High-performance Bus Switch family with very-low and flat Ron
CBT-C - Enhanced 5V Bus Switch family with -2V undershoot protection

DALLAS (July 22, 2003) - Texas Instruments Incorporated (TI) (NYSE: TXN) today announced the expansion of their signal switch portfolio with the introduction of the CB3T, CB3Q, and CBT-C bus switch families. These new FET switches provide high-performance, low-power replacements for standard bus-interface devices when signal buffering (current drive) is not required. The CB3T, CB3Q, and CBT-C bus switch families optimize next-generation datacom, networking, computing, portable communications, and consumer electronic designs, by supporting both digital and analog applications, including PCI interface, USB interface, memory interleaving, bus isolation, and low-distortion signal gating. (See: www.ti.com/signalswitches.)

Today's system designers face the challenge of supporting mixed-mode signal operation, and therefore need bus-interface devices that provide input to output level shifting (i.e., voltage translation). The CB3T family provides this needed voltage translation interface between components that require the different signaling standards (TTL, LVTTL, etc.) common in mixed system environments. Another challenge is to increase the performance of multi-channel applications that require transmission of huge amounts of data. The CB3Q family provides a high-performance interface solution ideal for communications and networking infrastructure equipment, as well as other data-intensive computing applications. In addition, the higher signal switching speeds associated with today's high-performance systems often create the problem of increased undershoot, a potential source of data corruption. The Active Undershoot Protection Circuitry in TI's CBT-C family, greatly reduces the possibility of undershoot induced data corruption in these high-speed applications.
"These new bus switch family releases illustrate our commitment to taking leadership in this market by providing system designers with high-performance bus-interface solutions to enhance their future system designs," stated David Hoover, WW product marketing manager for TI's Standard Linear and Logic division. "These families leverage TI's advanced Logic process technologies to create the highest performance switches in the market, as well as setting new levels in cost efficiency."

CB3T

CB3T is a voltage translator bus switch family operating at 3.3V or 2.5V Vcc, supporting systems using 5V TTL, 3.3V LVTTL and 2.5V CMOS switching standards. CB3T devices fully support mixed-mode signal operation on all ports by providing 5V input to 3.3V output level shifting with a 3.3V Vcc, and 5V or 3.3V input to 2.5V output level shifting with a 2.5V Vcc. This voltage translation feature allows the CB3T family to provide a high-performance interface between components (Memory, Processors, Logic, ASICs, I/O Peripherals, etc.), that require the different signaling standards (5V TTL, 3.3V LVTTL, 2.5V CMOS, etc.) common in mixed 2.5V to 5V system environments. Specifically designed to support today´s portable computing and communications applications, the CB3T family provides a high-performance low-power interface solution ideally suited for laptop computers, PDAs, cell phones, as well as any accompanying docking stations.

CB3Q

CB3Q is a high-performance bus switch family operating at 3.3V or 2.5V Vcc, supporting systems using 5V TTL, 3.3V LVTTL and 2.5V CMOS switching standards. CB3Q devices provide very-low and flat ON-state resistance, 0 to 5V rail-to-rail switching (no voltage clamping), and very-low input/output capacitance to minimize capacitive loading and signal distortion. The CB3Q family provides a high-performance interface solution for communications and networking infrastructure equipment (switches, routers, hubs, wireless base stations, network storage), as well as other data-intensive applications (servers, workstations, video processing, USB and PCI interface applications).

CBT-C

CBT-C is a general purpose bus switch family operating at 5V Vcc, supporting systems using 5V TTL and 3.3V LVTTL switching standards. The new CBT-C family offers numerous enhancements over the original CBT family, including; -2V undershoot protection, faster enable/disable times, and an Ioff feature for partial-power-down applications. The improved undershoot characteristics of the CBT-C family are particularly important in system environments where signal reflections and undershoot are common. Without such protection an undershoot event could cause a switch in the OFF state to be turned ON, creating bus contention and data corruption. The Active Undershoot Protection Circuitry employed in the CBT-C family provides protection for undershoot down to -2V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.

Availability and Packaging

Functions in all three bus switch technology families are available now from Texas Instruments and its authorized distributors. Remaining functions will continue to be released throughout 2003. CB3Q, CB3T and CBT-C devices will be made available in numerous advanced packaging options, such as the shrink small-outline package (SSOP), thin shrink small-outline package (TSSOP), thin very small-outline package (TVSOP), very fine pitch ball grid array package (VFBGA) and quad flatpack no-lead package (QFN) for reduced board area.