MAX3955
NOT RECOMMENDED FOR NEW DESIGNS11.32Gbps Transceiver with Dual CDRs, Digital Monitors, and DC-Coupled Laser Driver
Enables 1W SFP+ Sonet OC-192 Applications
- Part Models
- 2
- 1ku List Price
- Starting From $17.12
Overview
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Performance
- Dual CDRs Exceeding SONET Jitter Requirements with PLL Bandwidth Setting of 7MHz
- 540mW Typical IC Power Dissipation (ILD_MOD = 45mA, IBIAS = 45mA, Both CDRs Enabled)
- Independent, Reference-less Tx and Rx CDRs
- Pattern Generator for Receive and Transmit Paths
- Signal Loop-Back Paths
- Programmable Tx Input Equalization and Rx Output Deemphasis
- Pin-Compatible with MAX3956 11.3Gbps Transceiver
- Integrated Eye Safety Features with Maskable Fault and Interrupt Signal Generation
- Analog Monitors with Integrated 12-Bit ADC, Fully Supporting SFF-8472 DDM with Digital-Only µC
- High-Accuracy Temperature, VCC, and RSSI Monitors
- Auxiliary ADC Input at BADC for General Use
The MAX3955 is an 11.3Gbps, highly-integrated, low-power transceiver with dual CDRs, and digital diagnostics monitoring (DDM) designed for next-generation SONET transmission systems. The receiver incorporates a limiting amplifier with loss-of-signal (LOS) circuit. The limiting amplifier features an independent 9.95Gbps to 11.32Gbps CDR. The transmitter incorporates Maxim’s proprietary DC-coupled laser driver interface, an independent 9.95Gbps to 11.32Gbps CDR, and closed-loop control of average laser power.
The MAX3955 supports differential AC-coupled signaling with integrated 50Ω terminations at Rx input, Rx output, and Tx input. The Tx output is a DC-coupled 25Ω laser diode interface with dedicated pins for the laser anode (TOUTA) and the laser cathode (TOUTC).
An integrated 12-bit analog-to-digital converter (ADC) is utilized to provide digital monitors of internal/external temperature, VCC, and received signal strength indication (RSSI). The MAX3955’s analog monitors and the use of a 2-wire or 3-wire slave interface enables configuration through either a digital-only microcontroller (µC) or through the DS1978 SFP+ controller (future product).
The MAX3955 operates from single +3.3V supply and over a -40°C to +95°C temperature range and is available in a standard 5mm x 5mm, 32-pin TQFN-EP package.
Applications
- OC-192 XFP and SFP+ Optical Transceivers
Documentation
Data Sheet 1
Design Note 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX3955ETJ+ | LFCSP | ||
| MAX3955ETJ+T | LFCSP |
This is the most up-to-date revision of the Data Sheet.
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