# ONU STICK  20KM  Transceiver 1.25G

**Product** **Features**

SC/UPC receptacle SFP with PON ONU MAC inside, “Plug-and-play” via auto-discovery and configuration

1310nm DFB burst mode transmitter, 1490nm TIA continuous mode receiver

 Single 3.3V power supply

Digital diagnostic monitor interface compatible with SFF-8472  SFP MSA compliance

 Low EMI and excellent ESD protection

 Class I laser safety standard IEC-60825 compliant

 RoHS compliance

 XPON stick compatible with GPON and EPON system

Complies with SFP Multi-Source Agreement (MSA) SFF-8074i

Complies with ITUT-T G.984.2, G.984.2 Amendment 1

 Complies with ITUT G.988 ONU management and control interface (OMCI) specification

Complies with IEEE802.3AH

 Complies with SGMII and 1000BASE-X

 Complies with HGU   and SFU

 **Product Applications**

l Passive Optical Networks (PON)

l The product is an MSA-compliant SFP that incorporates not just the optics for an ONU, but all of the electronics need as well. It is a “PON on a Stick” that an entire FTTH ONU in a slightly oversized SFP. It can be plugged into networking equipment.  Allowing the data interfaces on a switch, router, etc. to be customized for different fiber environments and distance

requirements.

![](https://cdn.shopify.com/s/files/1/0758/0362/3703/files/DFT2026041102.png?v=1775899346)

**Performance Specifications**

**(1)** **Absolute** **Maximum** **Ratings**

**Parameter**

**Symbol**

**Min**

**Max**

**Unit**

Storage Ambient Temperature

Ts

\-40

+85

℃

Operating Case Temperature

Tc

0

+70

℃

\-40

+85

℃

Operating Humidity

OH

5

95

%

Power Supply Voltage

Vcc\-VEE

0

+3.6

V

Note：

1、Exceeding any of these values may immediately damage the device。

**(2)  Recommended Operating Conditions**

**Parameter**

**Symbol**

**Min**

**Typ**

**Max**

**Unit**

**Notes**

Power Supply Voltage

VCC

3.13

3.3

3.47

V

Power Dissipation

PD

2.10

2.5

W

Max value

under High

temp

environment

Operating Case Temperature

Tc

0

+70

°C

Tc

\-40

+85

°C

Operating Humidity Range

OH

5

95

%

Data Rate

/

TX:1.244 / RX:2.488

Gbit/s

GPON

MODE

/

TX:1.25 / RX:1.25

EPON

MODE

Data Rate Drift

/

\-100

+100

PPM

**(3)** **Transmitter Optical Character****istics**

**Parameter**

**Symbol**

**Min**

**Typ**

**Max**

**Unit**

**Note**

Optical Center Wavelength

λC

1290

1310

1330

nm

Spectral Width (-20dB)

∆λ

1

nm

Side Mode Suppression Ratio

SMSR

30

dB

Average Launch Optical Power

AOP

0.5

4

dBm

Launched into

SMF Fiber

Burst off Average Output Power

/

\-45

dBm

Extinction Ratio

ER

10

dB

Rise/Fall Time (20%-80%)

TR/TF

0.26

ns

Unfiltered

PRBS 223 \-

[1@1244.16](mailto:1@1244.16)

Mbps

RIN15OMA

/

\-115

dB/Hz

Optical Return Loss Tolerance

/

\-15

dB

www.dfttelecom.com

2 / 10

  

Transmitter Reflectance

/

\-10

dB

Transmitter and Dispersion Penalty

TDP

1

dB

Transmit on

20km SMF.

Optical Waveform Diagram

Compliant With ITU-T G984.2

PRBS 223 –1

@1244.16Mbps

**(4)** **Transmitter** **Electrical Characteristics**

**Parameter**

**Symbol**

**Min**

**Typ**

**Max**

**Unit**

**Note**

Data Input Differential Swing

/

300

1800

mV

CML

input, AC

coupled

Input Differential Impedance

/

90

100

110

Ω

Transmitter TxDisable Control Voltage -

/

0

0.8

V

Transmitter TxDisable Voltage - High

/

2.0

VCC

V

Transmitter Fault Alarm Voltage - Low

/

0

0.4

V

Transmitter Fault Alarm Voltage – High

/

2.4

Vcc

V

**(5)**  **Receiver** **Optical** **Characteristics**

**Parameter**

**Symbol**

**Min**

**Typ**

**Max**

**Unit**

**Note**

Operating Wavelength

λc

1480

1490

1500

nm

Sensitivity

SEN

\-28

dBm

PRBS 223 \- 1

@1G~2.5Gbps

Saturation Optical Power

SAT

\-8

dBm

Loss of Signal De-Assert

LOSD

\-29

dBm

Loss of Signal Assert

LOSA

\-40

dBm

Signal-Detected Hysteresis

/

0.5

6

dBm

Receiver Reflectance

/

\-12

dB

λ= 1490nm

WDM Filter Isolation

/

38

dB

λ= 1550nm

35

dB

λ= 1650nm

**(6)**  **Receiver** **Electrical** **Characteristics**

**Parameter**

**Symbol**

**Min**

**Typ**

**Max**

**Unit**

**Note**

Data Output Differential Swing

/

300

1200

mV

CML output,

AC coupled

Loss of Signal \- Low

/

0

0.4

V

Loss of Signal \- High

/

2.4

VCC

V

## Details

- **Price:** 0.0 USD
- **Vendor:** DFT TELECOM
- **Type:** 电脑网络
- **Tags:** dfttelecom, fiberoptic cable, fiberoptic Solutions, ftth, optic module, switch

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 0.00 USD | In stock |

## Images

- ONU STICK  20KM  Transceiver 1.25G

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> Source: [DFT TELECOM ](https://dfttelecom.com/products/onu-stick-20km-transceiver-1-25g)
> Updated: 2026-08-28