Multipoint-LVDS Single-Channel Receivers from TI

31st January 2007

ES Admin

0 0

Texas Instruments has introduced what is said to be the industry's first dedicated multipoint-LVDS receivers. To date, customers converting M-LVDS to LVTLL for multi-drop clock distribution have used transceivers with unnecessary integrated driver circuitry. The new single-channel receivers save space, power consumption and cost in end equipment such as cellular base stations, central office switches, network switches, routers and AdvancedTCA systems. The devices provide better technical performance in applications such as clock and synchronization distribution and control, as well as data signal transfer over backplanes and cables.

The SN65MLVD2 type-1 M-LVDS receiver provides the best noise margin with switching occurring near the zero volt (differential) input level. The SN65MLVD3 type-2 M-LVDS receiver provides built-in failsafe
protection and eliminates the need for external pull-up/down resistors.
Other key features include:
* Clock frequencies up to 125 MHz
* Signaling rates up to 250 Mbps
* Supports 30-ohms to 55-ohms line impedances
* SN65MLVD2 type-1 receive with 25 mV of input threshold hysteresis to
prevent output ringing
* SN65MLVD3 type-2 receive with 100 mV offset threshold to detect
open-circuit and idle-bus conditions
* Wide receiver common-mode Vin range, -1 V to 3.4 V allowing up to 2 V
of ground noise
* Meets or exceeds the M-LVDS standard TIA/EIA-899 for multipoint
topology
* High input impedance with low Vcc
* Bus-pin HBM ESD protection exceeds 9 kV

The addition of the SN65MLVD2 and SN65MLVD3 complements Texas Instruments' M-LVDS family of products including transceivers, drivers, receivers and clock fan-out buffers. Texas Instruments' interface IC offering for telecommunications also includes LVDS, PECL, RS-485,
PCI-Express and gigabit Ethernet serializers and deserializers (SerDes).

Both the SN65MLVD2 and SN65MLVD3 are available in volume quantities from TI and its authorized distributors packaged in 8-pin small outline package (DRB). Suggested resale pricing in 1,000-piece
quantities is $1.45 each for both the SN65MLVD2 and SN65MLVD3.