HMC856

Data Sheet 28 Gbps, 5-Bit, Digital Time Delay with Programmable Output Voltage HMC856 FEATURES Differential and single-ended operation Supports data rates up to 28 Gbps Fast rise/fall time: 20 ps/18 ps Low power consumption: 610 mW typical Programmable differential Output voltage swing: 500 mV p-p to 1350 mV p-p Single supply: −3.3 V 5 mm × 5 mm, 32-terminal ceramic leadless chip carrier (LCC) package: 25 mm2 APPLICATIONS SONET OC-192 High speed serial logic Clock and data recovery Broadband test and measurement equipment Frequency synthesis Matched timing GENERAL DESCRIPTION The HMC856 is a wideband time delay device with a 5-bit digital control designed for timing compensation or clock skew management applications. The time delay provides nearly 100 ps (maximum) of delay range with 3 ps resolution and supports 28 Gbps data. The monotonic delay is compensated for stable operation over both power supply and temperature variation. All differential inputs to the HMC856 are current mode logic (CML) and terminated on chip with 50 Ω to the positive supply ground, GND, and can be ac or dc-coupled. The differential CML FUNCTIONAL BLOCK DIAGRAM 32 NIC 31 GND 30 VEE 29 VB 28 VR 27 VEE 26 GND 25 NIC GND 1 I+ 2 I– 3 GND 4 GND 5 B0+ 6 B0– 7 NC 8 50Ω HMC856 50Ω DELAY 50Ω 50Ω 600Ω 600Ω 600Ω 600Ω 600Ω 24 GND 23 O+ 22 O– 21 GND 20 GND 19 B4+ 18 B4– 17 NC B1+ 9 B1– 10 GND 11 B2+ 12 B2– 13 GND 14 B3+ 15 B3– 16 14720-001 Figure 1. PACKAGE BASE VEE outputs are source terminated to...