SOURCE: Intersil

December 16, 2009 11:30 ET

Intersil's New ISL1539A Provides Dual Port, High Performance VDSL2 Line Drivers for DSLAM Designs

Supports Both 8MHz and 17MHz VDSL2 Profiles, Backward Compatible With ADSL2+ Standard

MILPITAS, CA--(Marketwire - December 16, 2009) - Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog and mixed-signal semiconductors, today introduced the ISL1539A, the latest addition to its family of DSL line drivers for the rapidly-growing VDSL2 ultra-high bit rate Internet connectivity standard.

The new ISL1539A supports both the 8MHz and 17MHz VDSL2 profiles, and is compatible with the widely used ADSL2+ standard. It provides a low-power solution in a space-efficient package to enable densely packed 24-port and 48-port deployments. It features 240MHz bandwidth and greater than 3000V/usec differential slew rate, ensuring adequate design margins for the most demanding line interface designs and multitone power ratio (MTPR) targets.

The ISL1539A includes four internal wideband op amps which are configured as two pairs of differential line drivers. Each driver is a wideband current feedback amplifier providing very high slew rates at low quiescent supply current. Each of the two pairs of amplifiers (ports) also includes two logic pins to step the quiescent current level in single designs supporting multiple DSL standards. In addition, an overall power adjustment pin provides very low quiescent power in less demanding applications. Full power is nominally 27.2mA/port. Designers can select from medium power cutback to 23mA/port, a low power condition at 13.5mA/port, and an off state consuming < 0.5mA/port.

With its wide 240MHz bandwidth and low distortion ( < -89dBc at 1 MHz, 2Vpp), the ISL1539A can deliver > -67dBc MTPR into a 100 ohm line load for the VDSL2 8b profile. The output stage uses a low headroom, high peak current design that can support high power push/pull line driver applications. On +/-12V supplies, the ISL1539A offers 1.1V headroom with > 360mA peak linear output current. Driving differentially in a VDSL2 application circuit, this equates to a 41.8 V peak-to-peak swing into a 100 ohm differential load. The device also supports high spurious-free dynamic range (SFDR) operation from supplies as low as +/-7.5V. Intended to be used as differential pairs, the two-port ISL1539A includes special circuitry to minimize common mode loop peaking while also reducing the common mode output noise spectrum.

Pricing and Availability

The ISL1539A is available now in compact 24-lead QFN packages. Prices per 1,000 pieces start at $2.27 each.

For more ISL1539A information visit:

To view a high-resolution downloadable photo of the ISL1539A visit Intersil's photo room at:

About Intersil

Intersil Corporation is a leader in the design and manufacture of high-performance analog and mixed signal semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, other handheld systems, and notebooks. Intersil's product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, switching DC/DC regulators, Zilker Labs Digital Power ICs and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; D2Audio products; video and high-performance operational amplifiers; high-speed data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at