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Analog Devices Inc./Maxim Integrated MAX3263CAG+T
- Part No.:
- MAX3263CAG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Laser Drivers
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX3263CAG+T.pdf
- Description:
- IC LASER CTRL 155MBPS 5.25V SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,694
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Product details
Overview
The MAX3263CAG+T from Maxim Integrated is a single +5V-powered, 155Mbps laser diode driver IC with integrated automatic power control (APC), differential PECL inputs, complementary modulation outputs (OUT+/OUT-), and temperature-compensated reference voltage (VREF1/VREF2). It delivers programmable bias current up to 60mA and modulation current up to 30mA using external resistors, and features TTL-compatible failout indication and programmable slow-start for laser protection in fiber-optic transmitters.
For engineers reviewing the MAX3263CAG+T datasheet, MAX3263CAG+T pinout, MAX3263CAG+T application, or MAX3263CAG+T equivalent, this device is selected for high-speed SDH/SONET and ATM optical modules requiring precise laser current control, APC stability over temperature, low-jitter modulation, and robust enable/fail-safe logic interfacing.
Technical Context
The MAX3263CAG+T integrates three functional blocks: a temperature-compensated bandgap reference generator, a laser bias block with 40× current-mirror gain (IBIASOUT = 40 × (IBIASSET + IBIASFB)), and a high-speed modulation driver with 20× current-mirror gain (IMOD = 20 × IMODSET). Its APC loop uses IPIN and IPINSET to regulate average optical power via photodiode feedback, with FAILOUT asserting low when monitor current drops below threshold.
It accepts 1100mVp-p differential PECL inputs (VIN+/VIN-) and provides complementary output currents into 25Ω loads. Rise/fall times are <1ns at 12mA modulation, with pulse-width distortion ≤100ps and edge aberrations ±15%, supporting 155Mbps NRZ data transmission compliant with SDH/SONET OC-3 and ATM physical layer requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +4.75V to +5.25V - Single rail enables direct integration with standard 5V telecom power domains. |
| Data Rate | 155Mbps - Matches OC-3/STM-1 SDH/SONET and ATM line rates without oversampling or retiming. |
| Rise/Fall Time | <1ns - Ensures minimal intersymbol interference and supports clean NRZ eye diagrams at full speed. |
| Bias Current Range | Up to 60mA - Programmable via RBIASSET resistor; sufficient for high-power 1300nm FP/DFB lasers. |
| Modulation Current Range | Up to 30mA - Set by RMODSET; enables extinction ratios ≥6dB with typical 1300nm laser diodes. |
| APC Accuracy | ±15% bias current drift over 0°C to +70°C - Maintains stable average optical power despite laser aging and temperature drift. |
| Input Compatibility | Differential PECL - Accepts industry-standard 1100mVp-p signals; supports Thevenin or ECL termination schemes. |
Pinout & Package
MAX3263CAG+T is housed in a 24-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, optimized for high-frequency layout and thermal dissipation in compact optical modules. GNDA/GNDB pins are segregated to isolate analog reference and high-speed modulation grounds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 10, 9 | ENB+, ENB- | Complementary TTL enable pair - Laser active only when ENB+ = high and ENB- = low; prevents spurious turn-on. |
| 5, 6 | VIN+, VIN- | Differential PECL data inputs - Accept 1100mVp-p signals; require 50Ω termination to VCC–2V. |
| 18, 20 | OUT-, OUT+ | Complementary modulation current outputs - Sink IMOD alternately to drive laser cathode; support push-pull modulation. |
| 16 | IBIASOUT | Laser bias current output - Delivers up to 60mA; connects to laser cathode via R-L filter to suppress ringing. |
| 23 | IPIN | Monitor photodiode anode input - Receives average photocurrent for APC feedback; threshold-triggered FAILOUT asserts if <2.6V. |
| 2, 12, 11, 13 | IPINSET, VREF1, VREF2, IBIASFB | APC programming and feedback nodes - VREF1/VREF2 provide 3.3V temp-compensated reference; IBIASFB sums with IBIASSET for closed-loop bias adjustment. |
| 3 | FAILOUT | Open-collector TTL fail indicator - Active-low signal indicates APC loss-of-regulation; requires 2.7kΩ pull-up to VCC. |
| 24 | SLWSTRT | Slow-start timing node - External capacitor sets startup time (tSTARTUP = 25.4kΩ × C); prevents laser overshoot during power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated reference | VREF1/VREF2 = 3.3V ±0.15V over 0°C to +70°C - Enables stable IBIAS/IMOD programming without external calibration. |
| Integrated APC circuit | Self-contained loop using IPIN, IPINSET, IBIASFB - Requires only two external resistors; eliminates need for discrete op-amps or DACs. |
| Programmable slow-start | tSTARTUP adjustable from 50ns (internal default) to >1µs - Prevents laser facet damage during initial turn-on. |
| TTL-compatible failout | FAILOUT open-collector output with 2.7kΩ pull-up - Directly interfaces with system microcontrollers for real-time laser health monitoring. |
| High-speed PECL interface | 1100mVp-p input sensitivity with <1ns edge fidelity - Supports legacy and custom PECL clock/data sources without level-shifting. |
Applications
| 155Mbps SDH/SONET Transmitter | 155Mbps ATM Optical Interface |
|---|---|
|
Use Scenario: OC-3/STM-1 line card transmitting synchronous digital hierarchy frames over single-mode fiber. IC Role / Device Role / Timing Role: Laser diode driver providing precise bias and modulation current control synchronized to 155.52MHz clock domain. Use Value: Enables guaranteed extinction ratio ≥6dB and jitter <1UI at full rate, meeting GR-253-CORE SONET compliance. |
Use Scenario: ATM edge switch port converting cell-based traffic to optical physical layer for metro access networks. IC Role / Device Role / Timing Role: High-fidelity modulation driver translating PECL-encoded ATM cells into optical NRZ waveform. Use Value: Delivers sub-1ns rise/fall times and <100ps pulse-width distortion, preserving cell boundary integrity across 155Mbps links. |
| Laser Diode Transmitter Module | Optical Transceiver with APC Feedback |
|
Use Scenario: Compact 1310nm TO-can or butterfly laser module used in enterprise datacom equipment. IC Role / Device Role / Timing Role: Fully integrated driver supplying bias, modulation, APC, and fault signaling in one SSOP package. Use Value: Reduces BOM count by eliminating discrete current sources, op-amps, and comparators; simplifies layout with GNDA/GNDB separation. |
Use Scenario: Industrial-grade SFP-style transceiver requiring long-term optical power stability over temperature and lifetime. IC Role / Device Role / Timing Role: Closed-loop APC controller maintaining constant average power using integrated transconductance amplifier and bias mirror. Use Value: Compensates for laser threshold drift up to ±40mA from setpoint, enabling >10-year operational life without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar laser diode driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3265CAG+T | Higher 622Mbps data rate; identical 24-pin SSOP package and APC architecture; requires higher VCC bypassing. | Targets OC-12/STM-4 systems; not drop-in compatible due to increased bandwidth demands on layout and termination. | Select MAX3265CAG+T only when upgrading to 622Mbps; retain same PCB footprint but verify signal integrity at 3x frequency. |
| LMH6521MA/NOPB | Wideband current-feedback amplifier (not dedicated laser driver); no integrated APC, bias programming, or FAILOUT logic. | Suitable for custom laser drivers where external control logic and feedback loops are implemented separately. | Choose LMH6521MA/NOPB only for non-standard architectures requiring >1GHz bandwidth and full analog design flexibility. |
Compared with MAX3265CAG+T, the MAX3263CAG+T offers optimized 155Mbps performance with lower power and simpler layout; compared with LMH6521MA/NOPB, it delivers turnkey APC, fail-safe signaling, and laser-specific current programming-reducing design cycle time by eliminating external compensation networks and control firmware.
Availability
MAX3263CAG+T is available at Aetrix Electronics and suitable for 155Mbps SDH/SONET transmitters, ATM optical interfaces, and industrial laser diode transmitter modules requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for MAX3263CAG+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 and mixed-signal ICs for communications, computing, and industrial applications, with emphasis on high-reliability, low-power, and signal-integrity-critical solutions.
The MAX3263CAG+T belongs to Maxim's optical communications driver product line, engineered specifically for cost-sensitive, high-volume 155Mbps fiber-optic transmitter modules needing integrated APC, fail-safe monitoring, and PECL compatibility.
FAQ
What is the maximum modulation current supported by the MAX3263CAG+T?
The MAX3263CAG+T supports a programmable modulation current up to 30mA, set by the external RMODSET resistor per the relationship IMOD = 20 × IMODSET. This value is confirmed in the AC Electrical Characteristics table under "Range of Programmable Modulation Current" with a typical 12mA operation at 155Mbps and absolute max of 30mA. Exceeding this may saturate the output stage or violate absolute maximum ratings.
Does the MAX3263CAG+T include automatic power control (APC) functionality?
Yes, the MAX3263CAG+T integrates a complete APC loop using IPIN (photodiode anode input), IPINSET (monitor current programming), IBIASFB (bias feedback), and internal transconductance amplifier. When configured with appropriate external resistors, it maintains constant average optical power by dynamically adjusting IBIASOUT in response to photodiode current changes - a core feature documented in the General Description and Detailed Description sections.
What package type and pin count does the MAX3263CAG+T use?
The MAX3263CAG+T uses a 24-pin SSOP (Shrink Small Outline Package) with 0.635mm lead pitch, as explicitly stated in the Pin Configuration section and Package Information. This surface-mount package is thermally and electrically optimized for high-frequency laser driver applications and matches the mechanical outline of industry-standard 24-pin SSOP footprints.
How does the slow-start function work on the MAX3263CAG+T?
The MAX3263CAG+T implements programmable slow-start via the SLWSTRT pin, where connecting an external capacitor to ground sets tSTARTUP = 25.4kΩ × (CSLWSTRT + 2pF). The internal default is ~50ns, and values up to several microseconds are achievable. This prevents laser facet damage during power-up by ramping bias and modulation currents gradually - a feature detailed in both the General Description and Pin Description sections.
Is the MAX3263CAG+T compatible with PECL input signals?
Yes, the MAX3263CAG+T accepts differential PECL inputs on VIN+ and VIN- with a minimum 1100mVp-p swing, as specified in the AC Electrical Characteristics table and Typical Operating Circuit. It supports standard PECL termination methods including Thevenin-equivalent and ECL-compatible schemes, all validated in Figure 4 of the datasheet.
MAX3263CAG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Laser Diode Controller (Fiber Optic)
- Data Rate:
- 155Mbps
- Number of Channels:
- 1
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Supply:
- 50 mA
- Current - Modulation:
- 30mA
- Current - Bias:
- 60 mA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
MAX3263CAG+T FAQ
1.How can I place an order for MAX3263CAG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3263CAG+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 MAX3263CAG+T reliable?
The price and inventory of MAX3263CAG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3263CAG+T is usually 5 days.
3.What payment methods are accepted for MAX3263CAG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3263CAG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3263CAG+T?
MAX3263CAG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3263CAG+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 MAX3263CAG+T?
For technical support, including MAX3263CAG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3263CAG+T requirements.
6.How does Aetrix verify that MAX3263CAG+T is sourced from the original manufacturer or authorized distributors?
All MAX3263CAG+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 MAX3263CAG+T meets industry standards.
7.What is the process for return or replacement of MAX3263CAG+T?
All MAX3263CAG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX3263CAG+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 MAX3263CAG+T part is unused and in its original packaging.
Return procedure for MAX3263CAG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX3263CAG+T Tags
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EPC21701
EPC
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EPC21601
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MAX3799ETJ+T
Analog Devices Inc./Maxim Integrated
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AD9665ACPZ-REEL7
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MAX3795ETG+
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EPC21603
EPC
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ONET8501VRGPT
Texas Instruments
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MAX3738ETG+T
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SY88022ALMG-TR
Microchip Technology
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ISL78365ARZ-T7A
Renesas
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EPC21603ENGRT
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