7498111001A 1000-BASE-T RJ45 Connector with LAN Transformer
7498111001A Magjack Specification:
| Parameter | Value |
|---|---|
| Part Number | 7498111001A |
| Type | 1000BASE-T MagJack |
| Description | 1000Base-T RJ45 Connector with Integrated Transformer |
| PoE Support | No |
| Ports | 1 |
| Tab Direction | Up |
| LED | No LED |
| Auto MDIX | Yes |
| Operating Temp. | -40 °C to +85 °C |
| Application |
IEEE 802.3ab Compliant for 1000Base-T |
Electrical Specifications (@25°C)
| Parameter | Specification |
|---|---|
| Inductance (OCL) | 350 µH min @ 100 kHz, 100 mV, 8 mA DC Bias |
| Turns Ratio (TR) | 1:1 (TX), 1:1 (RX) @ 100 kHz / 100 mV |
| Insertion Loss (IL) | -1.0 dB max (1–100 MHz) |
| Return Loss (RL) | -18 dB min (1–30 MHz) -15 dB min (30–60 MHz) -12 dB min (60–80 MHz) -10 dB min (80–100 MHz) |
| Common Mode Rejection (CMR) | -35 dB min (1–30 MHz) -30 dB min (30–100 MHz) |
| Crosstalk (CT) | -37 dB min (1–30 MHz) -32 dB min (30–60 MHz) -27 dB min (60–100 MHz) |
| Hi-Pot Test Voltage | 1500 Vrms, 1 min |
7498111001A Datasheet
1. 7498111001A Datasheet - Dimensions
2. 7498111001A Datasheet - Schematics
3. 7498111001A Datasheet - Soldering Spec.
FAQs About 7498111001A LAN Transformer
1. What is the 7498111001A LAN transformer used for?
The 7498111001A LAN transformer is designed for Gigabit Ethernet (1000BASE-T) networking interfaces. It provides signal isolation, impedance matching, and noise suppression between the Ethernet PHY and the RJ45 connector, ensuring reliable high-speed data transmission in network equipment.
Typical applications include Ethernet switches, routers, network interface cards (NICs), industrial Ethernet devices, and embedded networking systems.
2. What Ethernet standard does the 7498111001A support?
The 7498111001A is designed for 1000BASE-T Gigabit Ethernet, supporting 1 Gbps data transmission over twisted-pair copper cables such as Cat5e or Cat6.
This standard is widely used in data centers, enterprise networks, and industrial Ethernet devices.
3. What is the role of a LAN transformer in Ethernet circuits?
A LAN transformer (Ethernet magnetics) performs several important functions in Ethernet interfaces:
- Electrical isolation between network equipment and the cable
- Impedance matching for optimal signal integrity
- Common-mode noise suppression to reduce EMI
- Signal coupling between the PHY and the RJ45 port
These functions help ensure stable and standards-compliant Ethernet communication.
4. Is the 7498111001A compatible with Gigabit Ethernet PHY chips?
Yes. The 7498111001A LAN transformer is designed to work with Gigabit Ethernet PHY transceivers that support 1000BASE-T. It can be integrated into Ethernet interface designs where magnetics are required between the PHY and the RJ45 connector.
Engineers should verify impedance, turns ratio, and layout guidelines to ensure optimal compatibility.
5. What are typical applications of the 7498111001A?
The 7498111001A WE-RJ45LAN transformer is commonly used in:
- Gigabit Ethernet switches
- Broadband routers and gateways
- Network interface cards (NICs)
- Industrial Ethernet controllers
- Embedded networking devices
- IoT gateways
Its compact design makes it suitable for high-density networking hardware.
6. How does a LAN transformer improve Ethernet signal quality?
A LAN transformer improves signal quality by:
- Filtering electromagnetic interference (EMI)
- Reducing common-mode noise
- Maintaining proper signal balance
- Providing galvanic isolation
These features are essential for maintaining reliable Gigabit Ethernet communication over copper cables.
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