Mfr Part #:

AFSI-SD4Q4L

The Broadcom AFSI-SD4Q4L is a DC controller IC designed for Quad Electro-Absorption Modulator (EAM) based optical transceivers. It provides independent control and monitoring for bias currents and voltages.

✓ Total Stock: 51,729 pcs

$ Price Range: $0.75

AFSI-SD4Q4L Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Flip Electronics ✓ Non-Authorised Inventory information	51,729 pcs On Request	51729 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

AFSI-SD4Q4L Specifications Quick View

Most important parameters for selection – full specs in datasheet.

SELECT ALL

Category	Specialized ICs
Manufacturer Name	Broadcom Limited
Operating Temperature	-40 to 125 °C
Type	DC Controller

View Similar Products (0)

AFSI-SD4Q4L Description

Short technical summary and product information.

The Broadcom AFSI-SD4Q4L IC is a specialized component designed for controlling Quad Electro-Absorption Modulators (EAMs) in optical transceivers. It offers four independent current sources for DFB bias, ranging from 0 to 140 mA, and four independent voltage sources for EAM control, operating from 0 to -3V. Both are managed via 10-bit DAC control.

This controller IC also features comprehensive monitoring capabilities. It includes four independent channels for EAM current monitoring (0-40 mA) and four channels for RSSI input monitoring (0-2.3 mA), all utilizing 10-bit ADCs. Additionally, it monitors laser junction voltage, temperature (-10°C to 120°C), and critical voltage supplies like Vcc33 (3.3V ±10%), Vcc18 (1.8V ±10%), and VEE (-3.3V ±10%). The operating junction temperature range is -40°C to 125°C.

The AFSI-SD4Q4L supports microcontroller and host TWS interfaces, along with global BIAS_disable control and programmable RX_LOS output. Its design contributes to PCB area savings, module yield improvement, simplified calibration, and enhanced thermal performance in applications such as CFP4 LR4, CWDM QSFP28, DWDM QSFP28, and various PAM-4 QSFP28 modules.

AFSI-SD4Q4L Quick Information

Product Type: DC Controller

Canonical Name: Broadcom AFSI-SD4Q4L DC Controller for Quad EAM

Subcategory: Specialized ICs

AFSI-SD4Q4L Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

AFSI-SD4Q4L Estimated Pricing

Qty	Low	High
1+	$0.75	$0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

AFSI-SD4Q4L Features

Quad DFB bias current sources with 0-140 mA range.
Quad EAM voltage sources with 0 to -3V range.
10-bit DAC control for bias and voltage.
On-chip temperature monitoring from -10°C to 120°C.
Wide junction operating temperature range -40°C to 125°C.

AFSI-SD4Q4L Applications

DC bias control for quad EAM optical transceivers
DFB laser bias current generation for fiber optics
EAM voltage biasing with monitoring capabilities
RSSI-based optical signal monitoring and LOS management

AFSI-SD4Q4L FAQs

4 frequently asked questions generated from this part’s specifications.

What is the operating temperature range of the AFSI-SD4Q4L?

-40°C to 125°C junction operating temperature.

What is the DFB bias current range per channel?

0 to 140 mA per channel, controlled by 10-bit DAC.

What is the EAM voltage range per channel?

0 to -3V per channel, controlled by 10-bit DAC.

What monitoring channels are available on the AFSI-SD4Q4L?

The device includes four EAM current monitoring channels (0-40 mA, 10-bit ADC), four RSSI input monitoring channels (0-2.3 mA, 10-bit ADC), laser junction voltage monitoring (Vf), temperature monitoring (-10°C to 120°C, 10-bit ADC), and supply voltage monitoring for Vcc33 (3.3V), Vcc18 (1.8V), and VEE (-3.3V).