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25G/40G Transceivers

25Gb/s SFP28 DWDM 20KM Optical Transceiver Module

Product description: ACS-25GE-DWDM-Cxx-ER transceiver is designed for use in 25-Gigabit Ethernet links up to 20km over single mode fiber. The module consists of DWDM EML Laser, APD and Preamplifier in a high-integrated op
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Description

ACS-25GE-DWDM-Cxx-ER transceiver is designed for use in 25-Gigabit Ethernet links up to 20km over single mode fiber. The module consists of DWDM EML Laser, APD and Preamplifier in a high-integrated optical sub-assembly. Digital diagnostics functions are available via a 2-wire serialinterface, as specified in SFF-8472.This module is designed for single mode fiber and operates at a nominal wavelength of 100GHz ITU Grid, C Band DWDM wavelength.

Features

l Up to 25.78Gb/s data links

l DWDM EML transmitter and APD receiver

l 100 GHz ITU channel spacing with integrated wavelength locker

l Up to 20km on 9/125um SMF

l Hot-pluggable SFP28 footprint

l Support Digital Diagnostic Monitoring interface

l Duplex LC/UPC type pluggable optical interface

l RoHS-10 compliant and lead-free

l With CDR function

l Single +3.3V power supply

l Compliant with SFF+MSA and SFF-8472

l Metal enclosure, for lower EMI

l Meet ESD requirements, resist 8KV direct contact voltage

l Case operating temperature

Commercial: 0 ~ +70oC

Industrial: -40 ~ +85oC

Optical Characteristics

The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Parameter	Symbol	Min.	Typical	Max	Unit	Notes
Transmitter
Optical Wavelength	λC	λc -0.1		λc +0.1	nm	1
Center Wavelength Spacing			100		GHz
Optical Spectral Width	∆λ			1	nm
Average Optical Power	PAVG	0		5	dBm	2
Side Mode Suppression Ratio	SMSR	30			dB
Optical Extinction Ratio	ER	6			dB
Transmitter OFF Output Power	Poff			-30	dBm
Transmitter and Dispersion Penalty	TDP			2.7	dB
Optical Return Loss Tolerance	ORLT			20	dB
Transmitter Eye Mask	Compliant with IEEE802.3ae

Parameter	Symbol	Min.	Typical	Max	Unit	Notes
Receiver
Center Wavelength	λC	1270		1610	nm
Receiver Sensitivity	Sen.			-14	dBm	3
Average Receive Power		-20		-5	dBm
Input Saturation Power (overload)	Psat	-8			dBm
LOS Assert	LOSA	-30			dBm
LOS De-assert	LOSD			-21	dBm
LOS Hysteresis	LOSH	0.5			dB
Damage Threshold	THd	0			dBm

Notes:

1. λc refer to wavelength selection, and corresponds to approximately 0.8 nm.

2. Class 1 Laser Safety per FDA/CDRH and IEC-825-1 regulations.

3. Measured with Light source 1528.77~1563.86nm, ER=4dB; BER =<10^-12 @ PRBS=2^31-1 NRZ.

Wavelength Selection: C-band λc Wavelength Guide Pin Descriptions

Channel	Wavelength (nm)	Frequency (THZ)	Channel	Wavelength (nm)	Frequency (THZ)
C17	1563.86	191.70	C39	1546.12	193.90
C18	1563.05	191.80	C40	1545.32	194.00
C19	1562.23	191.90	C41	1544.53	194.10
C20	1561.42	192.00	C42	1543.73	194.20
C21	1560.61	192.10	C43	1542.94	194.30
C22	1559.79	192.20	C44	1542.14	194.40
C23	1558.98	192.30	C45	1541.35	194.50
C24	1558.17	192.40	C46	1540.56	194.60
C25	1557.36	192.50	C47	1539.77	194.70
C26	1556.55	192.60	C48	1538.98	194.80
C27	1555.75	192.70	C49	1538.19	194.90
C28	1554.94	192.80	C50	1537.40	195.00
C29	1554.13	192.90	C51	1536.61	195.10
C30	1553.33	193.00	C52	1535.82	195.20
C31	1552.52	193.10	C53	1535.04	195.30
C32	1551.72	193.20	C54	1534.25	195.40
C33	1550.92	193.30	C55	1533.47	195.50
C34	1550.12	193.40	C56	1532.68	195.60
C35	1549.32	193.50	C57	1531.90	195.70
C36	1548.51	193.60	C58	1531.12	195.80
C37	1547.72	193.70	C59	1530.33	195.90
C38	1546.92	193.80	C60	1529.55	196.00
Non-ITU	Peak wavelength between 1528.77nm-1563.86		C61	1528.77	196.10

Ordering Information

Part Number	Data Rate (Gb/s)	Wavelength (nm)	Transmission Distance(km)	Temperature (oC) (Operating Case)
ACS-25GE-DWDM-Cxx-ER	25.78	CH17~CH61	20km SMF	0~70 commercial