Semtech: Signal Integrity Products

Features of Semtech's Signal Integrity Products

Semtech's signal integrity products include:High-speed data transmissionIt is mainly composed of optical, analog and mixed signal ICs to achieve this.

Key features include:

-High performance and low power consumption: Low latency design optimized for data centers, 5G networks, and broadcasting equipment.

-Wide range of supported standards: Ethernet (NRZ/PAM4), Fibre Channel, InfiniBand®, PON (GPON, XGS-PON, HS-PON), etc.

Comprehensive portfolio: Includes CDRs, laser drivers, TIAs, limiting amplifiers, signal conditioners, and more.

・ Next-generation network compatibility: Supports data rates from 10G to 400G, and even up to 1.6T

Data Center Product Lineup

Semtech provides ultra-low power, low latency optical and copper interconnects for AI, cloud and enterprise networks.

FiberEdge® (Optical Interconnect)

Receiver: High-performance analog TIA (Transimpedance Amplifier)

item	GN1800	GN1812	GN1814	GN1816	GN1817	GN1825
data rate	56 GBd PAM4	56 GBd PAM4	56 GBd PAM4	56 GBd PAM4	56 GBd PAM4	56GBd PAM4
number of channels	1	4	4	4	4	8
Channel Pitch	-	750 μm	500 μm	250 μm	-	500 μm
Purpose	100G Ethernet	400G Ethernet	400G/800G Ethernet	400G/800G Ethernet	400G Ethernet	800G / 1.6T Ethernet
feature	- Low IRN - High bandwidth - MGC/AGC compatible - Equipped with RSSI - LOS support	- Low IRN - High bandwidth - MGC/AGC compatible - Equipped with RSSI - LOS support - COB/SiPh compatible	- Low IRN - High bandwidth - MGC/AGC compatible - Equipped with RSSI - Supports both LOS and LOM - COB/SiPh compatible	- Low IRN - High bandwidth - MGC/AGC compatible - Equipped with RSSI - LOS support - COB/SiPh compatible - Wire bonding compatible	- Low IRN - High bandwidth - MGC/AGC compatible - Equipped with RSSI - Supports both LOS and LOM - Input inductance compensation	- Low IRN - High bandwidth - MGC/AGC compatible - Equipped with RSSI - Supports both LOS and LOM - COB/SiPh compatible

*Low IRN: Low Input-Referred Noise
*MGC/AGC: Manual/Automatic Gain Control
*RSSI: Received Signal Strength Indicator
*LOS: Loss of Signal detection function
*LOM: Loss of Modulation detection function
*COB: Chip-on-Board implementation
*SiPh: Silicon Photonics compatible

Transmitter: Laser driver

item	GN1848	GN1862
type	Quad-Channel VCSEL Driver	Single Channel EML Driver
Purpose	400GBASE-SR4/VR4 800GBASE-SR8/VR8	100G, 200G, 400G Ethernet (FR/DR)
Modulation method	PAM4	PAM4
data rate	56 GBd	24～56 GBd
number of channels	4	1
Target laser	VCSEL (multimode)	EML (single mode)
Channel Pitch	250 μm	-
Bandwidth	40 GHz	Approximately 48 GHz
output	Programmable bias & modulation current	Single-ended output, 2.0 Vpp SE
feature	- Low power consumption and low noise - Programmable bias/modulation current - Wire bondable bare die	- Low THD (approx. 2%) - Output swing level detection - Low power consumption (about 420mW)
Main Applications	Short-reach multimode optical link, AOC	Long-distance single-mode optical links (up to 40km)

*AOC: Active Optical Cable
*Low THD: Low total harmonic distortion (low harmonic distortion in the signal)

CopperEdge® (Copper Interconnect)

Item	GN8112	GN8214	GN8224	GN8234 GN8234E
type	Linear Equalizer
data rate	112 Gbps (PAM4)	128 Gbps (PAM4)	224 Gbps (PAM4)
Symbol Rate	56 GBaud	64 GBaud	112 GBaud
number of channels	4	４	４
Purpose	- Active Copper Cable (ACC) - Backplane - Onboard	- 4x100G ACC QSFP-112 - 8x100G ACC QSFP-DD/OSFP - Backplane - Onboard	- 4x200G ACC QSFP-224 - 8x200G ACC QSFP-DD/OSFP - Backplane - Onboard - Mainly on the host side (near end) - "Dual-end equalization" is also possible in combination with GN8234	- 4x200G ACC QSFP-224 - 8x200G ACC QSFP-DD/OSFP - Backplane - Onboard - Mainly on the cable side (far end) - "Dual-end equalization" is also possible in combination with GN8224
Supported standards	IEEE 400GBASE-CR4 Auto-Negotiation/Link Training
function	- Programmable PAM4 equalizer - Up to 15dB equalization - Low latency (< 10ps)	- Programmable PAM4 equalizer - 12–20dB @ 40GHz equalization - Low latency (< 100ps)	- Programmable PAM4 equalizer - 9.8–14.5dB @ 53.125GHz equalization - Low latency (< 100ps)	- Programmable PAM4 equalizer - 13–20dB @ 53.125GHz Equalization of - Low latency (< 100ps)
Power consumption	<0.75W/400G end	Approximately 920mW typical (Boost Setting 3, 4ch total)	Approx. 900mW typ (Boost Setting 2, 4ch total)	Approximately 900mW typical (Boost Setting 3, 4ch total)
feature	- ACC enables longer distance transmission than passive DAC - Up to 5m Twinax cable extension - 400G/800G compatible for data centers	- ACC enables longer distance transmission than passive DAC - Up to 5m Twinax cable extension - 400G/800G compatible for data centers	- ACC enables longer distance transmission than passive DAC - Up to 3m Twinax cable extension - 800G/1.6T compatible for data centers - EEPROM automatic setting (GN8234E)

*ACC: Active Copper Cables

Product lineup for PON (Passive Optical Network)

We provide low-cost, low-power analog ICs ideal for FTTx (Fiber-to-the-X) deployment, supporting everything from EPON/GPON to next-generation 25G/50G PON.

Common features

- PON-X family: Integrates laser driver, TIA, and CDR to achieve low power consumption and high performance
・Supported standards: EPON, GPON, XGS-PON, 25G PON, 50G HS-PON
・Applications: OLT (central office), ONU (in-home), FTTR (Fiber-to-the-Room)

category	Model number	Usage	Key Specifications
10G PON	GN28L96	Combo IC for ONU	- 10Gbps Tx/Rx symmetric PON - Burst mode laser driver + limiting amplifier integration - Automatic extinction ratio control - Built-in APD controller -TX_SD & Rogue ONU Alarm - High-precision A/D + temperature sensor - Package: QFN-32 Pb-Free/RoHS
	GN28L97B	Combo IC for ONU	- 2.5Gbps Tx/10Gbps Rx Asymmetric PON - Advanced Eye Shaping - Built-in APD controller -TX_SD & Rogue ONU Alarm - High-precision A/D + temperature sensor - Package: QFN-32 Pb-Free/RoHS
	GN7068	TIA (receiving side)	- Highly sensitive TIA - Burst mode support - Low noise design
	GN7069	TIA (receiving side)	- Combining with GN28L96 to configure ONU - High sensitivity and low noise
	GN7355	ONU transceiver IC	- 10G EPON compatible - Burst Mode - Built-in CDR for low jitter signal - IEEE P802.3av compliant - Low power consumption design
	GN7153B	Combo IC for OLT	- For XGS-PON OLT - Burst Mode Limiting Amplifier - Built-in AC coupling - Supports XGS-PON timing and sensitivity requirements
25G PON	GN7060	TIA (receiving side)	- 25G PON burst mode TIA - High sensitivity and low noise design
25G PON	GN25L95	Combo IC for ONU	- GPON/EPON compatible - Low power consumption
50G PON	GN7161	Combo IC for OLT	- 50Gbps EML laser driver (for externally modulated lasers) - 25Gbps Burst Mode Limiting Amplifier (Receiver) - Multi-rate support (25G/12.5G/10G) - Built-in A/D converter (DDMI compliant) - Laser safety features and automatic power control (APC) - Transmit Eye-Shaping technology realizes high-quality eye patterns - HS-PON OLT/50G Triple-Gen OLT SFP-DD Module

*APD: Avalanche Photodiode
* TX_SD (Transmit Signal Detect): Signal that detects the presence or absence of a transmission signal
*Rogue ONU alarm: Alarm for detecting illegal ONU signals
*DDM (Digital Diagnostic Monitoring): Digital diagnostic monitoring function

Mobile Transport (5G/6G) product lineup

We provide low-latency, low-power optical connections for 5G/6G fronthaul, backhaul, and access networks.

Common features

Tri-Edge™ Analog CDR
・Low latency
・Low power consumption
・SFP56 compatible

Item	GN2255S	GN2256
data rate	53Gbps PAM4	53Gbps PAM4
Laser driver	DC coupled DML compatible	EML/MZM compatible
BiDi compatible	can be (BiDi, CWDM6)	none
package	WLCSP (4.5 x 3.7 x 0.4 mm)	WLCSP (4.5 x 3.7 x 0.4 mm)
Temperature (Tc)	-40°C ～ +100°C	-40°C ～ +100°C
feature	- BiDi compatible - CWDM6 compatible - Ultra-small package	- IEEE/Open Eye compliant - Laser compensation function - For silicon photonics - Ultra-small package

*BiDi (Bidirectional): Separating upstream and downstream signals on the same fiber using different wavelengths
*CWDM6 (Coarse Wavelength Division Multiplexing, 6 wavelengths): A method of multiplexing communication over a single fiber using six different wavelengths.