My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX3765CUB+T
- Part No.:
- MAX3765CUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX3765CUB+T.pdf
- Description:
- IC LIMITING AMP 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX3765CUB+T from Maxim Integrated is a 2.5Gbps current-mode logic (CML) limiting amplifier designed for Fibre Channel and Gigabit Ethernet optical receiver front-ends. It features programmable loss-of-signal (LOS) detection with 2.5kΩ–20kΩ threshold resistor support, 11ps deterministic jitter, 100–150ps edge speed, and operates from +3.0V to +5.5V supply. It delivers stable CML output under varying input signal amplitudes (10–1200mVpp) in GBIC-style receivers.
For engineers reviewing the MAX3765CUB+T datasheet, MAX3765CUB+T pinout, MAX3765CUB+T application, or MAX3765CUB+T equivalent, key selection criteria include its 10-pin µMAX-EP package, internal SQUELCH-to-VCC connection, fixed LEVEL-to-GND configuration, RMS power detection accuracy, and compatibility with transimpedance amplifiers such as MAX3266/MAX3267.
Technical Context
The MAX3765CUB+T implements a multistage limiting amplifier with 49dB total gain and integrated offset-correction loop using CAZ1/CAZ2 pins. Its RMS power detector compares input signal amplitude against a TH-set threshold to drive complementary LOS outputs with 2.2–4.4dB hysteresis.
It uses CML output buffers tolerant of inductive connectors, with fixed 20mA output current (LEVEL internally grounded), and supports AC-coupled termination to 50Ω or 75Ω loads. Input differential resistance is tightly controlled at 97–103Ω between IN+ and IN−.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 2.5Gbps - supports full-rate Fibre Channel 2x and Gigabit Ethernet physical layer signaling. |
| Deterministic Jitter | 11psp-p - ensures timing margin compliance in high-speed serial links with K28.5 pattern stress. |
| Input Voltage Range | 10–1200mVpp - accommodates wide dynamic range from transimpedance amplifiers without saturation. |
| LOS Hysteresis | 2.2–4.4dB - provides stable optical signal detect behavior against noise-induced toggling in receiver applications. |
| Power-Supply Current | 64–90mA - enables thermal management in compact 10-pin µMAX packages with exposed paddle grounding. |
| Differential Input Resistance | 97–103Ω - matches standard 100Ω transmission lines and minimizes reflection-induced jitter. |
| CML Output Edge Speed | 100–155ps - meets rise/fall time requirements for 2.5Gbps NRZ eye opening per IEEE 802.3 and FC-PI standards. |
Pinout & Package
MAX3765CUB+T is housed in a 10-pin µMAX-EP package (3.0mm × 3.0mm, 0.8mm height) with exposed paddle soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4 | GND | Ground reference for analog core and exposed paddle thermal path. |
| 2 | CAZ1 | Offset-correction loop capacitor terminal; used with CAZ2 to set low-frequency cutoff (2kHz–2MHz). |
| 3 | TH | Loss-of-signal threshold programming node; sets LOS assert level via external resistor to GND. |
| 5, 8 | IN+, IN− | Differential input pair with 100Ω impedance; accepts signals from TIA stages like MAX3266/MAX3267. |
| 6 | LOS | Inverted TTL-compatible loss-of-signal output; asserts high when input falls below TH-defined threshold. |
| 7 | OUT− | CML data output complement; driven at ~20mA with VCC-referenced swing (~550–1200mV into 75Ω). |
| 9 | OUT+ | CML data output noninverted; paired with OUT− for differential signaling and common-mode rejection. |
| 10 | VCC | +3.0V to +5.5V supply input; decoupling required near pin for high-frequency stability. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable LOS Threshold | Configurable via single RTH (2.5kΩ–20kΩ) to set assert/deassert levels from 2.2mV to 67mV, enabling precise optical power monitoring. |
| Internal Squelch Enable | SQUELCH pin internally tied to VCC - automatically mutes OUT+/OUT− during LOS assertion without external control logic. |
| Fixed CML Output Current | LEVEL pin internally grounded - guarantees 20mA output drive for consistent signal integrity across voltage/temperature. |
| Low Input-Referred Noise | 230µVRMS - preserves SNR in cascaded optical receiver chains where TIA output noise dominates system BER. |
| Robust Input ESD Protection | Integrated structures per Figure 4 - withstands ±2kV HBM without external protection, simplifying front-end layout. |
Applications
| Gigabit Ethernet Optical Receiver | Fibre Channel 2x Receiver |
|---|---|
Use Scenario: Front-end limiting stage in SFP modules receiving 1.25Gbps or 2.5Gbps NRZ data over multimode fiber. IC Role / Device Role / Timing Role: Converts variable-amplitude TIA output into clean, constant-level CML data stream with jitter-controlled edges. Use Value: Enables interoperability with MAC-layer PHYs by meeting IEEE 802.3 Clause 35 eye mask and jitter budget requirements. | Use Scenario: Signal conditioning block in FC-AL or FC-SW receivers operating at 2.125Gbps with 8B/10B encoding. IC Role / Device Role / Timing Role: Provides loss-of-signal indication and squelched output during link dropouts to prevent downstream frame corruption. Use Value: Reduces false LOS assertions via programmable hysteresis (2.2–4.4dB), improving link reliability in noisy backplane environments. |
| GBIC Module Receiver | Optical Interconnect Backplane |
Use Scenario: Core limiting amplifier in hot-pluggable GBIC transceivers compliant with SFF-8053 specification. IC Role / Device Role / Timing Role: Interfaces directly with MAX3266/MAX3267 TIAs and drives CML-compatible clock/data recovery ICs. Use Value: 10-pin µMAX footprint allows dense placement in GBIC's constrained 57mm × 20mm form factor while maintaining thermal performance via EP grounding. | Use Scenario: High-speed data retiming node in board-to-board optical interconnects using VCSEL-based links. IC Role / Device Role / Timing Role: Restores signal amplitude and edge fidelity after channel-induced attenuation and dispersion. Use Value: 11ps deterministic jitter and 100–155ps edge speed preserve eye opening across 10cm+ FR4 traces with embedded micro-optics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar limiting amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3265CUB+ | Same 10-pin µMAX package, identical 2.5Gbps CML interface, but SQUELCH pin unconnected (not internally tied to VCC). | Requires external TTL-level enable signal for squelch; less suitable for fully autonomous LOS mute operation. | Select MAX3265CUB+ only if squelch control must be externally gated; MAX3765CUB+ preferred for self-contained operation. |
| MAX3265EUE+ | 16-pin TSSOP-EP package, extended -40°C to +85°C temperature range, same electrical specs otherwise. | Better suited for industrial/automotive optical modules requiring wider ambient tolerance and larger PCB real estate. | Choose MAX3265EUE+ for extended temperature designs; MAX3765CUB+ remains optimal for commercial-grade GBIC/SFP space-constrained layouts. |
Compared with MAX3265CUB+ and MAX3265EUE+, the MAX3765CUB+ offers factory-configured squelch enable and compact µMAX packaging-critical for cost-sensitive, high-volume optical transceiver designs where board area and control pin count are constrained.
Availability
MAX3765CUB+T is available at Aetrix Electronics and suitable for Gigabit Ethernet optical receivers, Fibre Channel 2x modules, and GBIC transceivers requiring stable component supply with lead-free compliance and traceable sourcing.
Supply support for MAX3765CUB+T 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) designs precision analog, mixed-signal, and high-speed communication ICs for demanding infrastructure and industrial applications.
The MAX326x/MAX376x family was developed specifically for optical receiver signal conditioning-delivering low-jitter limiting amplification, robust LOS detection, and CML/PECL output flexibility in compact packages for pluggable transceivers.
FAQ
What is the supply voltage range supported by the MAX3765CUB+T?
The MAX3765CUB+T operates from a single +3.0V to +5.5V supply. This wide range allows direct compatibility with both 3.3V and 5V system rails without level-shifting, and supports stable CML output swing across the full voltage window. The MAX3765CUB+T maintains specified jitter and gain performance within this range at temperatures from 0°C to +70°C.
How is loss-of-signal (LOS) detection configured on the MAX3765CUB+T?
LOS detection on the MAX3765CUB+T is configured using an external resistor (RTH) connected between the TH pin and ground. Values from 2.5kΩ to 20kΩ set corresponding assert thresholds from 2.2mV to 41.5mV differential input. The device provides complementary LOS and LOS outputs with 2.2–4.4dB hysteresis, and internal 8kΩ pull-ups ensure TTL-compliant voltage levels when loaded ≥4.7kΩ.
Does the MAX3765CUB+T require external components for basic operation?
Yes-the MAX3765CUB+T requires at minimum: (1) a decoupling capacitor on VCC, (2) coupling capacitors (≥0.01µF) on IN+ and IN− for AC-coupling, (3) a termination network (e.g., 100Ω series + 50Ω/75Ω load) on OUT+/OUT−, and (4) an RTH resistor on TH for LOS functionality. CAZ1/CAZ2 may be left open for standard 8B/10B applications, per design procedure guidance.
What is the function of the LEVEL pin on the MAX3765CUB+T?
The LEVEL pin on the MAX3765CUB+T is internally connected to ground, fixing the CML output current at approximately 20mA. This eliminates the need for external LEVEL pin routing and ensures consistent output drive strength and edge speed across voltage and temperature-unlike MAX3265 variants where LEVEL is user-configurable.
Is the MAX3765CUB+T pin-compatible with other devices in the MAX326x/MAX376x family?
No-the MAX3765CUB+T shares the same 10-pin µMAX-EP footprint and pinout as MAX3265CUB+ and MAX3269CUB+, but differs electrically: SQUELCH is internally tied to VCC (vs. unconnected in MAX3265CUB+), and LEVEL is internally grounded (vs. open in MAX3265CUB+). These internal configurations make it functionally distinct despite mechanical compatibility.
MAX3765CUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Limiting Amplifier
- Applications:
- Optical Networks
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-uMAX/uSOP
MAX3765CUB+T FAQ
1.How can I place an order for MAX3765CUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3765CUB+T 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 MAX3765CUB+T reliable?
The price and inventory of MAX3765CUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3765CUB+T is usually 5 days.
3.What payment methods are accepted for MAX3765CUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3765CUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3765CUB+T?
MAX3765CUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3765CUB+T 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 MAX3765CUB+T?
For technical support, including MAX3765CUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3765CUB+T requirements.
6.How does Aetrix verify that MAX3765CUB+T is sourced from the original manufacturer or authorized distributors?
All MAX3765CUB+T 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 MAX3765CUB+T meets industry standards.
7.What is the process for return or replacement of MAX3765CUB+T?
All MAX3765CUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX3765CUB+T, 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 MAX3765CUB+T part is unused and in its original packaging.
Return procedure for MAX3765CUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX3765CUB+T Tags
-
TSM103WIDT
STMicroelectronics
-
LM392M/NOPB
Texas Instruments
-
MCP6S93T-E/UN
Microchip Technology
-
INA137UA/2K5
Texas Instruments
-
INA134UA/2K5
Texas Instruments
-
TS34118CS28 RDG
Taiwan Semiconductor Corporation
-
SI8920BC-IPR
Skyworks Solutions Inc.
-
ADUM3190ARQZ-RL7
Analog Devices Inc.
-
ADUM3190ARQZ
Analog Devices Inc.
-
AMC1311BDWVR
Texas Instruments
-
AMC1350DWVR
Texas Instruments
-
ADUM3190SRQZ-RL7
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
