These devices are designed for a wide range of new and emerging optical, networking and storage area network (SAN) standards including 40/100 GbE, 40G (D)QPSK, 100G DP-QPSK, 14G Fiber Channel and Infiniband EDR, and broadband test equipment.
The HMC850LC3C is a 1:2 fanout buffer designed to support data transmission rates up to 28 Gbps and clock frequencies as high as 20 GHz. The HMC940LC4B is Hittite’s first 1:4 fanout buffer, and supports data transmission at up to 13 Gbps or clock buffering up to 13 GHz. These devices feature differential inputs and outputs which are DC coupled and terminated on-chip with 50 Ω resistors to ground. The outputs may be used in either single-ended or differential modes, and should be AC or DC coupled into 50 Ω resistors connected to ground.
The HMC850LC3C exhibits propagation delays of 75 ps, while rise and fall times are less than 16 ps. Ideal for high-performance, broadband test applications, it exhibits only 2 ps p-p of deterministic jitter and less than 0,2 ps rms of additive random jitter.
The HMC851LC3C and HMC844LC4B are XOR/XNOR gate functions which support clock frequencies as high as 28 GHz and data transmission rates up to 28 Gbps and 45 Gbps respectively. All input signals to the gates are terminated with 50 Ω to ground on-chip, and may be either AC or DC coupled. The differential outputs may be either AC or DC coupled, and should be connected directly to a 50 Ω-to-ground terminated system.
The HMC851LC3C exhibits propagation delays of 97 ps, while rise and fall times are less than 15 ps. Deterministic jitter is typically less than 2 ps p-p, while additive random jitter is less than 0,2 ps rms. For the HMC844LC4B, typical propagation delay is 90 ps, while rise and fall times are less than 11 ps. Deterministic jitter is less than 3 ps p-p, while additive random jitter is less than 0,2 ps rms.
All four devices operate from a single -3,3 V d.c. supply, and feature an output level control pin, which allows for loss compensation or for signal level optimisation.
The HMC850LC3C, HMC940LC4B, HMC851LC3C and HMC844LC4B complement many of Hittite’s previously released Fiber Optic and High Speed Logic products, are housed in ceramic RoHS compliant SMT packages, and are specified for operation from -40°C to +85°C.
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