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MAX9391

Anything-to-LVDS Dual 2 x 2 Crosspoint Switches

Dual, 2 x 2 Crosspoint Switches with Anything-to-LVDS Guarantee 1.50GHz Maximum Operating Frequency

Data Sheet (Rev. 2)

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Overview

1.5GHz Operation with 250mV Differential Output Swing
2ps_(RMS) (max) Random Jitter
AC Specifications Guaranteed for 150mV Differential Input
Signal Inputs Accept Any Differential Signaling Standard
LVDS Outputs for Clock or High-Speed Data
High-Level Input Fail-Safe Detection (MAX9390)
Low-Level Input Fail-Safe Detection (MAX9391)
3.0V to 3.6V Supply Voltage Range
LVCMOS/LVTTL Logic Inputs Control Signal Routing

The MAX9390/MAX9391 dual 2 x 2 crosspoint switches perform high-speed, low-power, and low-noise signal distribution. The MAX9390/MAX9391 multiplex one of two differential input pairs to either or both low-voltage differential signaling (LVDS) outputs for each channel. Independent enable inputs turn on or turn off each differential output pair.

Four LVCMOS/LVTTL logic inputs (two per channel) control the internal connections between inputs and outputs. This flexibility allows for the following configurations: 2 x 2 crosspoint switch, 2:1 mux, 1:2 splitter, or dual repeater. This makes the MAX9390/MAX9391 ideal for protection switching in fault-tolerant systems, loopback switching for diagnostics, fanout buffering for clock/data distribution, and signal regeneration.

Fail-safe circuitry forces the outputs to a differential low condition for undriven inputs or when the common-mode voltage exceeds the specified range. The MAX9390 provides high-level input fail-safe detection for LVDS, HSTL, and other GND-referenced differential inputs. The MAX9391 provides low-level input fail-safe detection for LVPECL, CML, and other V_CC-referenced differential inputs.

Ultra-low 82ps_(P-P) (max) pseudorandom bit sequence (PRBS) jitter ensures reliable communications in high-speed links that are highly sensitive to timing error, especially those incorporating clock-and-data recovery, or serializers and deserializers. The high-speed switching performance guarantees 1.5GHz operation and less than 65ps (max) skew between channels.

LVDS inputs and outputs are compatible with the TIA/EIA-644 LVDS standard. The LVDS outputs drive 100Ω loads. The MAX9390/MAX9391 are offered in a 32-pin TQFP package and operate over the extended temperature range (-40°C to +85°C).

Also refer to the MAX9392/MAX9393 with flow-through pinout.

Applications

Central Office Backplane Clock Distribution
DSLAM
Fault-Tolerant Systems
High-Speed Telecom/Datacom Equipment
Protection Switching

Documentation

Data Sheet 1

MAX9390-MAX9391: Anything-to-LVDS Dual 2 x 2 Crosspoint Switches Data Sheet (Rev.2) 06/05/2007

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX9390 and MAX9391

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Features and Benefits

Single 3V to 3.6V Supply Operation
1.5GHz Operation
100Ω Controlled-Differential Signal Traces
Supports Testing with Various Mediums
- Differential Probes
- Twisted-Pair Wire
- Coax Cables with SMA Connectors
Surface-Mount Components
Fully Assembled and Tested

Product Details

The MAX9390 evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that simplifies the evaluation of the MAX9390 1.5GHz, dual 2 x 2 crosspoint switch. The EV kit accepts low-voltage differential signals (LVDS) or high-speed transistor logic (HSTL) input signals and converts the signals to LVDS outputs for each channel.

The MAX9390 EV kit is designed with 100Ω differential controlled impedance in a four-layer PCB. The board is designed for direct differential probing of the LVDS inputs/outputs. The EV kit operates from a single 3.3V supply. The MAX9390 EV kit can also be used to evaluate the MAX9391, which accepts LVPECL and CML input signals.