MAX9390, MAX9391 Anything-to-LVDS Dual 2 x 2 Crosspoint Switches

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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.

Key Features

Applications/Uses

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

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

Key Specifications: High-Speed Interconnect (Differential Signaling)

Part Number

Features

Rx Signal Type

Tx Signal Type

Functions

Number of Rx

Number of Tx

Propagation Delay (max) (ps)

Supply Voltage (V)

Random Jitter (max) (ps RMS)

Deterministic Jitter (max) (ps pp)

Pulse Skew (max) (ps)

Channel-to-Channel Skew (max) (ps)

Output Transition Time (max) (ps)

ESD Protection (±kV)

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX9390

•	Anything Inputs

•	Cross-Flow Pinout

•	High-Level Input Fail-Safe Detection

CML
HSTL
LVDS
LVPECL

LVDS

•

Switch

565

3.3

185

Yes

THIN QFN/32
TQFP/32

$5.60 @ 1k

MAX9391

•	Anything Inputs

•	Cross-Flow Pinout

•	Low-Level Input Fail-Safe Detection

See Data Sheet

THIN QFN/32

See All High-Speed Interconnect (Differential Signaling) (131)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.