HMC842 45 Gbps Fanout Buffer with Programmable Output Voltage

The HMC842LC4B is a 1:2 Fanout Buffer designed to support data transmission rates up to 45 Gbps. The device can also operate with clock signals up to 28 GHz. During normal operation, input data (or clock) is transferred to both output channels. Differential input and output signals of the HMC842LC4B are terminated with 50 Ohms to ground on-chip, and may be either AC or DC coupled. The Outputs can be connected directly to a 50 Ohms-to-ground terminated system, while DC blocking capacitors should be used if the terminating system is 50 Ohms to a non-ground DC voltage.

The HMC842LC4B also features two separate output level control pins, VAC1 and VAC2 which provide loss compensation and signal level optimization for each output channel independently. The HMC842LC4B operates from a single -3.3V DC supply and is available in a ceramic RoHS compliant 4x4 mm SMT package.

Applications

OC-768 & SDH STM-256 Equipment
RF ATE Applications
Short, intermediate, & Long Haul Fiber Optic Applications
Broadband Test & Measurement
Serial Data Transmission up to 45 Gbps
Clock Buffering up to 28 GHz

Features and Benefits

Supports Clock Frequencies up to 28 GHz
Independent Programmable Output Swing for Each Channel: 400 - 1200 mVp-p Diff.
Single-Ended or Differential Operation

Power Consumption: 465 mW
Less than 500 fs Additive RMS Jitter
Fast Rise and Fall Times: <12 ps
24 Lead 4x4mm SMT Package: 16mm²

High Speed Logic & Data Path Management

Fanout Buffers

Data Sheets

Document	note
HMC842 Data Sheet HMC842 Data Sheet	PDF 845.63 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
HMC842LC4B Production	24 ld LCC (4x4mm w/2.5mm EP)	OTH 50	-40 to 70C	616.69	499.52	Y
HMC842LC4BTR Production	24 ld LCC (4x4mm w/2.5mm EP)	REEL 100	-40 to 70C	616.69	499.52	Y
HMC842LC4BTR-R5 Production	24 ld LCC (4x4mm w/2.5mm EP)	REEL 500	-40 to 70C	616.69	499.52	Y