Technical Specs Summary

Product Overview

DT-5803ATQZ Series 1×9 155M Optical Transceiver is a dual-rate 100/155Mbps fiber transceiver in the compact 1×9 pin-package format, designed for SONET OC-3 / SDH STM-1 telecom applications as well as Fast Ethernet and Fiber Channel fiber links. The SC/FC/ST optical port is compatible with industry-standard connectors, and the transceiver operates from a single +3.3V power supply.

The transmitter section integrates an FP (Fabry-Perot) laser with a driver IC incorporating both temperature compensation and APC (Automatic Power Control) circuitry. This combination maintains stable optical output power across the full –40°C to +85°C industrial temperature range, without manual calibration or optical power monitoring in the host system. The receiver uses a PIN photodetector optimized for wide dynamic range.

The module housing uses a plastic top cover with a metal bottom shield, providing EMC/EMI protection while keeping the package compact for PCB integration. All three models (SC, FC, ST) are identical in electrical specification — the only difference is the optical connector type. The module is Class I laser eye-safe and RoHS 2.0 compliant.

 Key Feature

Dual-rate 100/155Mbps operation — single module covers both rates

OC-3 / STM-1 compliant — meets SONET and SDH telecom standards

1×9 pin package — compact direct PCB-mount format

 SC / FC / ST interface variants — three models, one per connector type

1310nm FP Laser with APC circuit and temperature compensation

 PIN photodetector — wide dynamic range receiver

Multimode 50/125μm fiber — up to 2km

Single +3.3V power supply

LVPECL logic  |  LVPECL signal detect output

Industrial operating temperature: –40°C to +85°C only

 Class I laser eye safety compliant

 RoHS 2.0 compliant

Plastic top cover + metal bottom EMC shield

Technical Advantages

OC-3 / STM-1 Telecom Standard Compliance

Compliance with SONET OC-3 (155.52Mbps) and SDH STM-1 standards makes this module suitable not only for enterprise Fast Ethernet and Fiber Channel applications but also for carrier-grade telecom equipment, DSLAM fiber uplinks, and SDH add-drop multiplexers — applications where telecom standard certification is a procurement requirement.

APC + Temperature Compensation — Stable Power Without Calibration

The APC (Automatic Power Control) circuit continuously adjusts the laser drive current to maintain constant output optical power regardless of temperature, aging, or manufacturing variation. Combined with temperature compensation circuitry, this ensures that the module delivers consistent performance across the entire –40°C to +85°C range without any external calibration, manual adjustment, or optical power monitoring by the host PCB. This is particularly valuable in long-lifetime industrial equipment where recalibration in the field is not practical.

Dual-Rate 100/155Mbps — Single Module for Two Standards

The module auto-adapts to both 100Mbps (Fast Ethernet / FDDI) and 155Mbps (OC-3 / STM-1) data rates. This eliminates the need to stock separate 100Mbps and 155Mbps 1×9 modules for equipment that must interface with either rate — reducing inventory complexity and qualification overhead for OEM equipment manufacturers.

Industrial-Only Temperature Grade: –40°C to +85°C

Unlike most 1×9 transceivers that offer separate commercial (0°C to +70°C) and industrial variants, the DT-5803ATQZ series is manufactured exclusively to the industrial temperature specification. This eliminates the risk of accidentally deploying a commercial-grade module in an industrial environment and simplifies procurement — any DT-5803ATQZ module is always rated for industrial installation.

Metal Bottom EMC Shield

The combination of a plastic top cover and metal bottom shield provides EMI suppression equivalent to full metal housing designs for most industrial EMC requirements, while reducing the overall module weight and manufacturing cost. The metal shield is particularly effective at reducing conducted and radiated emissions from the high-frequency FP laser driver circuit.

Typical Applications

SONET OC-3 and SDH STM-1 telecom fiber links

Fast Ethernet 100BASE-FX multimode fiber connections

Fiber Channel SAN fiber connectivity at 100/155Mbps

DSLAM and DSL access equipment fiber uplinks

SDH add-drop multiplexer fiber interfaces

Industrial Ethernet and fieldbus fiber backbone links

OEM PCB-integrated 155M fiber transceiver for industrial equipment

Harsh-environment deployments requiring –40°C industrial qualification

Compatibility and Deployment

The 1×9 module mounts directly on the host PCB via through-hole pins, compatible with standard 1×9 PCB footprints. SC, FC, and ST interfaces accept corresponding standard duplex fiber patch cords. LVPECL differential output is compatible with standard SERDES and FPGA fiber front-end inputs.

Select the model suffix based on the fiber connector type in your installation: –1 for SC, –2 for FC, –3 for ST. All electrical parameters, performance specifications, and temperature ratings are identical across all three variants. For custom configurations or OEM volume support, contact our technical sales team.

 FAQ Module

Q: What standards does the DT-5803ATQZ 1×9 module comply with?

A: The DT-5803ATQZ module is compliant with SONET OC-3 (155.52Mbps) and SDH STM-1 standards, in addition to Fast Ethernet 100BASE-FX and Fiber Channel applications. It also meets Class I laser eye safety requirements and RoHS 2.0 environmental compliance for EU market access.

Q: What is APC and why does it matter for this module?

A: APC (Automatic Power Control) is a feedback circuit in the laser driver that continuously adjusts the laser drive current to maintain constant optical output power, compensating for temperature changes, component aging, and manufacturing variation. In the DT-5803ATQZ, APC combined with temperature compensation ensures stable output across –40°C to +85°C without host-side calibration — important for long-lifetime industrial equipment where field recalibration is impractical.

Q: What is the difference between the three DT-5803ATQZ models?

A: The three models are electrically identical. The only difference is the optical connector type: DT-5803ATQZ-1 uses an SC interface, DT-5803ATQZ-2 uses FC, and DT-5803ATQZ-3 uses ST. Select the model that matches the connector type in your fiber plant and equipment.

Q: Does this module support single-mode fiber?

A: No. The DT-5803ATQZ series is designed for multimode fiber (50/125μm) at 1310nm with a maximum transmission distance of 2km. For single-mode fiber or longer distances, the GIGAC 1×9 155M product series includes other variants supporting single-mode fiber up to 120km.

Q: Why is there only one temperature grade for this module?

A: The DT-5803ATQZ series is manufactured exclusively to the industrial temperature specification (–40°C to +85°C). This means all units off the production line are industrial-grade by default, eliminating any risk of accidentally deploying a commercial-grade module in an industrial or outdoor environment. It also simplifies OEM procurement.

Q: Is this module compatible with Fast Ethernet 100BASE-FX equipment?

A: Yes. The module supports 100Mbps operation, making it compatible with standard Fast Ethernet 100BASE-FX fiber equipment in addition to 155Mbps OC-3/STM-1 telecom applications. The dual-rate 100/155Mbps auto-adaptation handles both rates without hardware modification.

Ordering Information

Three models — select based on optical connector type. All models: 100/155Mbps, 1310nm, 2km MMF, –40°C to +85°C.

All three models are electrically and optically identical. The only selection criterion is the fiber connector type (SC / FC / ST) matching your installation. For pigtail or custom configurations, contact our technical sales team.

Industrial Optical Module Assembly Line

High-Precision Fiber Assembly

Automated Manufacturing for Consistency

100% Functional & Reliability Testing