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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

Analog Devices Inc./Maxim Integrated MAX3783UCM-TD

Name: MAX3783UCM-TD
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX3783UCM-TD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX3783UCM-TD

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Specialized

Package:: 48-TQFP Exposed Pad

Datasheet:: MAX3783UCM-TD.pdf

Description:: 2.7GBPS DUAL MUX/BUFFER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX3783UCM-TD from Maxim Integrated is a dual-channel 2.7Gbps serial multiplexer and buffer with selectable line-side loopback, designed for high-speed system interconnect and serial backplane applications. It features CML I/O, on-chip 100Ω differential input termination and 50Ω output back-termination, 11ps deterministic jitter, and operates from a single 3.3V supply in a 48-pin TQFP-EP package.

For engineers reviewing the MAX3783UCM-TD datasheet, MAX3783UCM-TD pinout, MAX3783UCM-TD application, or MAX3783UCM-TD equivalent, key selection criteria include deterministic jitter performance at 2.75Gbps, TTL-compatible control logic (SELA/SELB/LB1A–LB2B), CML input/output voltage swing compatibility, and thermal management via exposed-pad grounding.

Technical Context

The MAX3783UCM-TD implements two independent signal paths, each integrating a 2:1 receiver mux (LI1_/LI2_ → SO_) and a transmitter with dual fanout (SI_ → LO1_/LO2_). Control is fully TTL-compatible with internal 15kΩ pull-up resistors on SELA, SELB, LB1A–LB2B pins.

Each channel supports AC-coupled PECL operation via CML I/O with guaranteed 1200–2200mV_p-p differential output swing and 200–2200mV_p-p input tolerance. Deterministic jitter is specified at 11ps_p-p (K28.5 pattern) and propagation delay is 340–500ps (LI_→SO_, SI_→LO_, LI_→LO_).

Key Specifications

Parameter	Value and Actual Design Meaning
Max Data Rate	2.75 Gbps (guaranteed operation up to 3.125 Gbps)
Deterministic Jitter	11 ps_p-p (measured with K28.5 pattern, critical for eye opening at 2.7Gbps)
Supply Voltage	3.3 V ±10% (single rail; supports industrial temperature range 0°C to +85°C)
CML Output Swing	1200–2200 mV_p-p (ensures robust signal integrity into 50Ω loads)
Input Termination	On-chip 100Ω differential (eliminates external termination components for CML/PECL inputs)
Power Dissipation	1.12 W typical (enables thermal design with exposed-pad soldering to PCB ground)
Mux Switch Time	9 ns (SELA/SELB or LB_ assertion to valid output; enables fast failover switching)

Pinout & Package

The MAX3783UCM-TD is housed in a 48-pin TQFP-EP (exposed pad) package. The exposed pad must be soldered to PCB ground for thermal dissipation and electrical reference stability.

Pin/Terminal	Circuit Role	Design Meaning
SIA+/SIA−, SIB+/SIB−	CML Serial Inputs	Differential data inputs for channels A and B; accept CML or AC-coupled PECL signals
SOA+/SOA−, SOB+/SOB−	CML Serial Outputs	Mux-selected outputs (LI1_/LI2_) with 50Ω back-termination; drive downstream SERDES
LO1A+/LO1A−, LO2A+/LO2A−, LO1B+/LO1B−, LO2B+/LO2B−	CML Line Outputs	Fanout outputs from SI_ inputs; support redundant routing and loopback testing
LI1A+/LI1A−, LI2A+/LI2A−, LI1B+/LI1B−, LI2B+/LI2B−	CML Line Inputs	Differential inputs for mux selection; terminated internally with 100Ω differential impedance
SELA/SELB	TTL Mux Select	Active-high control (internal 15kΩ pull-up) to choose LI1_ or LI2_ for SO_ output
LB1A/LB2A/LB1B/LB2B	TTL Loopback Enable	Active-low control (internal 15kΩ pull-up) to route SO_ to corresponding LO_ pair for test mode
VCC (pins 4,9,14,17,20,23,27,34,38,41,44,47)	Power Supply	+3.3V supply connections distributed across package for low-noise power delivery
GND (pins 1,12,24,30,31,37)	Ground Reference	Supply ground connections; EP pad must be soldered to PCB ground plane

Key Features

Feature	Design Value
Integrated 2:1 Mux + Dual Fanout Transmitter	Enables redundant serial I/O path selection and failover without external logic or buffers
Selectably Enabled Line-Side Loopback	Per-channel loopback (LB1A–LB2B) allows in-system testing of physical layer without host intervention
On-Chip 100Ω Differential Input Termination	Reduces BOM count and layout complexity for CML/PECL interfaces; eliminates discrete termination resistors
11ps Deterministic Jitter at 2.75Gbps	Ensures sufficient eye margin for reliable sampling in 2.5G/2.7G serial links (e.g., Fibre Channel, XAUI)
Exposed-Pad Thermal Management	EP pad soldered to PCB ground provides low thermal resistance path, enabling stable operation at 1.12W dissipation

Applications

Serial Backplane Interconnect	Fail-Over Protection Switching
Use Scenario: High-density telecom or datacom backplanes requiring 2.7Gbps point-to-point serial links between line cards and switch fabrics. IC Role / Device Role / Timing Role: Dual-channel mux/buffer routes and duplicates serial data streams while maintaining signal integrity across long traces. Use Value: On-chip 50Ω output termination and 100Ω input termination minimize reflections and preserve eye opening over FR4 PCBs.	Use Scenario: Redundant server or storage controller systems where automatic switchover to backup link is required upon primary path failure. IC Role / Device Role / Timing Role: MAX3783UCM-TD acts as a hardware-level failover switch with <9ns mux reconfiguration time and deterministic jitter control. Use Value: TTL-selectable loopback and dual fanout enable real-time health monitoring and seamless path switching without software latency.
System-Level Built-In Self-Test (BIST)	2.7Gbps Optical Module Interface
Use Scenario: Manufacturing test of high-speed interconnect assemblies using embedded loopback modes to verify physical layer functionality. IC Role / Device Role / Timing Role: Provides line-side loopback (LB1A–LB2B) to close signal paths locally for bit-error-rate (BER) validation. Use Value: Eliminates need for external loopback cables or test fixtures; supports automated production testing at full 2.75Gbps data rate.	Use Scenario: Electrical interface between ASIC SERDES and pluggable optical transceivers (e.g., SFP+ modules) operating at 2.5G/2.7G rates. IC Role / Device Role / Timing Role: Buffers and multiplexes signals between host PHY and optical module, supporting hot-plug detection and redundancy. Use Value: CML I/O compatibility and 11ps deterministic jitter meet SFF-8431 and IEEE 802.3ae jitter budgets for 2.5G/2.7G optical links.

Serial Backplane Interconnect

Fail-Over Protection Switching

Use Scenario: High-density telecom or datacom backplanes requiring 2.7Gbps point-to-point serial links between line cards and switch fabrics.

IC Role / Device Role / Timing Role: Dual-channel mux/buffer routes and duplicates serial data streams while maintaining signal integrity across long traces.

Use Value: On-chip 50Ω output termination and 100Ω input termination minimize reflections and preserve eye opening over FR4 PCBs.

Use Scenario: Redundant server or storage controller systems where automatic switchover to backup link is required upon primary path failure.

IC Role / Device Role / Timing Role: MAX3783UCM-TD acts as a hardware-level failover switch with <9ns mux reconfiguration time and deterministic jitter control.

Use Value: TTL-selectable loopback and dual fanout enable real-time health monitoring and seamless path switching without software latency.

System-Level Built-In Self-Test (BIST)

2.7Gbps Optical Module Interface

Use Scenario: Manufacturing test of high-speed interconnect assemblies using embedded loopback modes to verify physical layer functionality.

IC Role / Device Role / Timing Role: Provides line-side loopback (LB1A–LB2B) to close signal paths locally for bit-error-rate (BER) validation.

Use Value: Eliminates need for external loopback cables or test fixtures; supports automated production testing at full 2.75Gbps data rate.

Use Scenario: Electrical interface between ASIC SERDES and pluggable optical transceivers (e.g., SFP+ modules) operating at 2.5G/2.7G rates.

IC Role / Device Role / Timing Role: Buffers and multiplexes signals between host PHY and optical module, supporting hot-plug detection and redundancy.

Use Value: CML I/O compatibility and 11ps deterministic jitter meet SFF-8431 and IEEE 802.3ae jitter budgets for 2.5G/2.7G optical links.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel serial mux/buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX3782UCM-TD	Single-channel version; identical specs per channel but no second independent path	Used where only one 2.7Gbps path is needed; lacks dual-path redundancy	Select MAX3783UCM-TD when dual independent channels with separate control are required for fault-tolerant designs
DS25BR100TSQ/NOPB	2.5Gbps dual mux/buffer with LVDS I/O (not CML); no integrated loopback control	Targets lower-power, lower-jitter LVDS systems; requires external loopback routing	Choose MAX3783UCM-TD for CML/PECL ecosystems and built-in line-side loopback capability

Compared with MAX3782UCM-TD and DS25BR100TSQ/NOPB, the MAX3783UCM-TD uniquely delivers dual-channel independence with per-channel TTL loopback enables and on-chip CML termination-critical for compact, testable, and redundant 2.7Gbps backplane architectures.

Availability

MAX3783UCM-TD is available at Aetrix Electronics and suitable for serial backplane interconnect, fail-over protection switching, and system-level built-in self-test applications requiring stable component supply and long-term industrial temperature support (0°C to +85°C).

Supply support for MAX3783UCM-TD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for industrial, communications, and computing applications.

The MAX3783UCM-TD belongs to Maxim's high-speed serial interface product line, engineered specifically for 2.5G–3.125Gbps system interconnects demanding low jitter, integrated termination, and hardware-assisted testability.

FAQ

What is the maximum guaranteed data rate for the MAX3783UCM-TD?

The MAX3783UCM-TD is guaranteed to operate at 2.75 Gbps with full specification compliance, including jitter and eye diagram performance. Testing shows functional operation up to 3.125 Gbps, though some parameters like deterministic jitter increase to 25 ps_p-p at that rate. For production designs targeting 2.7Gbps serial links (e.g., Fibre Channel FC-2, XAUI), the MAX3783UCM-TD meets all timing and signal integrity requirements per its datasheet.

Does the MAX3783UCM-TD require external termination resistors?

No, the MAX3783UCM-TD integrates 100Ω differential termination on all CML inputs (LI1A/B, LI2A/B, SIA/B) and 50Ω back-termination on all CML outputs (SOA/B, LO1A/B, LO2A/B). This eliminates the need for external resistors in standard CML configurations. External AC-coupling capacitors remain necessary for PECL compatibility, but termination is fully on-die.

How does the loopback function work on the MAX3783UCM-TD?

The MAX3783UCM-TD provides four independent TTL-controlled loopback paths: LB1A/LB2A for channel A and LB1B/LB2B for channel B. When asserted low, each LB_ pin routes the corresponding SO_ output to its paired LO1_ or LO2_ output. This line-side loopback enables physical-layer testing without modifying upstream or downstream circuitry-ideal for manufacturing BIST and field diagnostics.

What is the role of the exposed pad on the MAX3783UCM-TD package?

The exposed pad on the MAX3783UCM-TD's 48-pin TQFP-EP package serves as both thermal conduction path and electrical ground reference. It must be soldered directly to the PCB ground plane to achieve specified thermal resistance and ensure stable 1.12W power dissipation. Failure to connect the EP pad results in elevated junction temperature and potential parametric shift or reliability risk.

Can the MAX3783UCM-TD interface directly with PECL devices?

Yes-the MAX3783UCM-TD's CML I/O supports AC-coupled PECL operation. Its inputs accept common-mode voltages from –0.5V to (VCC + 0.5V) and differential swings up to ±2.8V, matching LVPECL levels when coupled through 0.1μF capacitors. The outputs deliver 1200–2200mV_p-p swing into 50Ω, compatible with PECL receivers when DC-biased appropriately per HFAN-01.0/01.1 application notes.

MAX3783UCM-TD Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 48-TQFP Exposed Pad

Packaging:: Bulk

Product Status:: Active

Applications:: Mux/Buffer with Loopback

Interface:: CML

Voltage - Supply:: 3V ~ 3.6V

Supplier Device Package:: 48-TQFP-EP (7x7)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

MAX3783UCM-TD FAQ

1.How can I place an order for MAX3783UCM-TD through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX3783UCM-TD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MAX3783UCM-TD reliable?

The price and inventory of MAX3783UCM-TD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3783UCM-TD is usually 5 days.

3.What payment methods are accepted for MAX3783UCM-TD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3783UCM-TD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX3783UCM-TD?

MAX3783UCM-TD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX3783UCM-TD order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MAX3783UCM-TD?

For technical support, including MAX3783UCM-TD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3783UCM-TD requirements.

6.How does Aetrix verify that MAX3783UCM-TD is sourced from the original manufacturer or authorized distributors?

All MAX3783UCM-TD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX3783UCM-TD meets industry standards.

7.What is the process for return or replacement of MAX3783UCM-TD?

All MAX3783UCM-TD units undergo pre-shipment inspection (PSI). If there is an issue with MAX3783UCM-TD, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MAX3783UCM-TD part is unused and in its original packaging.

Return procedure for MAX3783UCM-TD:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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