Description of 7490240142 1000base T Transformer :
The 7490240142 is a single-port 1000Base-T transformer engineered
to provide reliable and efficient signal isolation for LAN
10/100/1000 Base-T networks. -40 °C to +85 °C wide operating
temperature range suitable for commercial and industrial
applications. Its surface mount design allows for easy integration
into PCBs, making it a versatile choice for various networking
devices such as switches, routers, and network interface cards
(NICs). Despite not featuring an improved common-mode rejection
ratio (CMRR), it maintains high performance and integrity in data
transmission. This transformer adheres to IEEE 802.3 standards,
providing essential voltage isolation and protecting against
high-voltage transients, enhancing the durability and safety of its
Ethernet connections. Compliant with most ICs for Ethernet applications such as
Microchip, Texas Instruments, Broadcom, and Linear Technology.
Electrical Properties of 1000 Base-T SMT Transformers:
Properties | Test conditions |
Value
| Unit | Tol. |
|---|
Inductance | 100 kHz / 100 mV @ 8 mA | 350 | µH | min. |
| Insulation Test Voltage | 1 min. | 4000 | V (RMS) | min. |
| DC Resistance | 100 kHz / 100 mV (Pins 13-24) | 1300 | mΩ | max. |
| Insertion Loss | 1-100 MHz | -1.2 | dB | max. |
| Return Loss | 1-30 MHz @ 100 Ω | -14 | dB | min. |
| Return Loss | 30-60 MHz @ 100 Ω | -12 | dB | min. |
| Return Loss | 60-80 MHz @ 100 Ω | -9 | dB | min. |
| Return Loss | 80-100 MHz @ 100 Ω | -8 | dB | min. |
| Differential to Common Mode Rejection Ratio | 1-30 MHz | -35 | dB | min. |
| Differential to Common Mode Rejection Ratio | 30-60 MHz | -32 | dB | min. |
| Differential to Common Mode Rejection Ratio | 60-100 MHz | -30 | dB | min. |
| Crosstalk | 1-60 MHz | -35 | dB | min. |
| Crosstalk | 60-100 MHz | -30 | dB | min. |
| Turns Ratio | | 1:1 | | ±2% |
| Data rate | 1000 Base-T |
| Working Voltage | | 600 | V (RMS) | max. |
| Working Voltage | | 250 | V (RMS) | max. |
| Clearance distance | | 6 | mm | min. |
| Creepage distance | | 10.5 | mm | min. |
7490240142 Dimensions (mm):
7490240142 Recommended Land Pattern: [mm]:
7490240142 Schematic:
