Overview of LP1188NL Single-Port SMD Ethernet Isolation Transformer
Module
The LP1188NL is a high-performance, single-port Ethernet magnetics module
designed to support 10/100 Base-T network data rates. Housed in a compact 16-pin surface-mount (SMD) module, it offers galvanic isolation, impedance matching,
and signal integrity functionality between an Ethernet PHY and the
twisted-pair cable interface. It is engineered for reliability in
embedded, industrial, and consumer Ethernet applications.
Key Features
- Supports 10 Base-T and 100 Base-TX network speeds.
- Single-port (1x10/100) configuration, 16-pin SMD footprint.
- Turns ratio: 1CT : 1CT (both transmit and receive sides) for optimized coupling.
- Operating temperature range: –40 °C to +85 °C for broad
environmental tolerance.
- Hi-Pot (isolation) rating typically 1500 Vrms (minimum) for
equipment safety & insulation.
- Compliant with IEEE 802.3 (10/100 Base-T) standards, RoHS, REACH,
UL, ISO9001/14001 certified (via LINK-PP manufacturing).
- Open-frame high-performance magnetics design, optimized for EMI
suppression, compact board layout, and SMT reflow compatibility.
Electrical Specifications @25°C
| Item | Parameter | Typical / Limit |
|---|
| 1. Turns Ratio (±3%) | TX | 1CT : 1CT |
| RX | 1CT : 1CT |
| 2. OCL (Open Circuit Inductance) | | ≥ 350 µH@100 kHz, 0.1 Vrms, 8 mA DC Bias |
| 3. Insertion Loss | 0.1–100 MHz | ≤ 1.1 dB |
| 4. Return Loss (dB MIN @100 Ω) | 30 MHz | ≥ 20 dB |
| 60 MHz | ≥ 14 dB |
| 80 MHz | ≥ 11.5 dB |
| 5. Crosstalk (dB MIN) | 30 MHz | ≥ 45 dB |
| 60 MHz | ≥ 40 dB |
| 100 MHz | ≥ 35 dB |
| 6. DCMR (dB MIN) | 30 MHz | ≥ 42 dB |
| 60 MHz | ≥ 37 dB |
| 100 MHz | ≥ 33 dB |
| 7. Hi-Pot | | ≥ 1500 Vrms |
| 8. Operating Temperature | | -40°C to +85°C |
Design & Selection Considerations
- Confirm network speed requirement: If your system requires Gigabit
(1000 Base-T) or higher, select accordingly; LP1188NL is optimized
for 10/100 Base-T.
- Ensure PCB layout accommodates transformer placement near PHY or RJ45 magnetics path
for best signal integrity.
- Consider the isolation voltage rating relative to the system safety/regulatory environment.
- Verify the suitability of the reflow profile (SMT) and the maximum component height, considering enclosure
constraints.
- If PoE (Power-over-Ethernet) capability is required, ensure
magnetics and RJ45 interface are rated accordingly (LP1188NL is for
NON-PoE).
Part Number of Related Magnetics Modules:
GHS16V258-AF276 | SM51108L | A-0719-2011 | TG110-S055N2RL |
H1102FNL | XF-11FB-05ANL | H1601CG | TS21CHF |
H1102NL | 000-7090-37R-LF1 | HA-003 | TS6121C |
H1102NLT | 100B-1003X | HX1188 | XFATM9B |
H1601CG | TG110-E055N5RL | HX1188FNL | XF-LCZ3A1CB |
H16127MCG | XFATM9B | HX1188NL | H1102 |
HY601680 | LP1183NL | HX1260NL | LAN1102-50 |
LFE8505 | LP1183NLE | S558-5999-U7-F | MS10232 |
MOX-LAN-SP4B-1100 | LP1193NL | LP1108NLE | TF110-S055N2 |
SL4024_APL-002A | LP1198NL | LP1148NLE | 11F(B)-11 |
TF110-S055N2 | LP1198NLE | LP1164NLE | 7090-37R-LF1 |
LP2019NL | LP1260ANLE | LP1178NL | LP1011PNL |
LP2019NLE | LP2006ANL | LP1101NL | LP1012NL |
LP2023NLE | LP2009NL | LP1102NL | LP1041PNL |
LP21640NL | LP2014NLE | LP1102NLE | LP1053NL |
LP21643NL | LP2017NL | LP2019ANLE | LP1062ANLE |
LP21646ANL | LP40453PNL | HX1260FNL | LP1086NLE |
Why Choose LINK-PP?
Quality & Reliability
LINK-PP is a global leader in the design and manufacturing of Integrated RJ45 Connectors and Discrete Magnetic Transformers.
We adhere to the highest production standards, following the strict quality guidelines originally established by
Tyco Electronics. All raw material suppliers are carefully selected and approved
according to Tyco’s standards before entering our production
process.
- Manufactured under strict quality control
- Certified with ISO 9001:2008
- UL, REACH, and RoHS compliant
- OEM supplier for Tyco Electronics for 9 years
- Committed to active environmental protection policies
- 100% module testing — every unit is tested, not just samples
Our Valued Customers
LINK-PP is trusted by leading global technology companies,
including:
Texas Instruments, INTEL, SAMSUNG, FLUKE, EKF, HUAWEI, IBM, CISCO, FLEXTRONICS, JABIL, Foxconn, CANON, and Arduino.
