For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
1
HMC959LC3
v02.0614
DIVIDE-BY-4 w/ RESET &
PROGRAMMABLE OUTPUT VOLTAGE, 26 GHz
The HMC959LC3 is a Divide-by-4 w/Reset desig-
ned to support clock frequencies as high as 26
GHz. During normal operation, with the reset pin not
asserted, the output toggles from its prior state on the
positive edge of the clock. This results in a divide-by-
four function of the clock input. Asserting the reset
pin forces the Q output low regardless of the clock
edge state (asynchronous reset assertion). Reversing
the clock inputs allows for negative-edge triggered
applications.
All differential inputs to the HMC959LC3 are CML and
terminated on-chip with 50 Ohms to the positive supply,
GND, and may be DC or AC coupled. Outputs can be
connected directly to a 50 Ohm ground-terminated
system or drive devices with CML logic input. the
HMC959LC3 also features an output level control pin,
VR, which allows for loss compensation or signal level
optimization. The HMC959LC3 operates from a single
-3.3 V supply and is available in ROHS-compliant 3x3
mm SMT package.
General Description
Features
Functional Diagram
Supports Clock Frequencies up to 26 GHz
Differential or Single-Ended Operation
Fast Rise and Fall Times: 19 ps
Low Power Consumption: 281 mW typ.
Programmable Differential
Output Voltage Swing: 800 - 1800 mVp-p
Propagation Delay: 121 ps
Single Supply: -3.3 V
16 Lead Ceramic 3x3 mm SMT Package: 9 mm
2
Typical Applications
The HMC959LC3 is ideal for:
• High Speed Frequency Divider (up to 26 GHz)
• Broadband Test & Measurement
• Clock Synthesis
• Phase Locked Loops
Electrical Specications, T
A
= +25 ºC Vee = -3.3 V, VR = 0 V
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage -3.6 -3.3 -3.0 V
Power Supply Current 85 mA
Maximum Clock Rate 26 GHz
Input Voltage Range -1.5 0.5 V
Input Differential Range 0.1 2.0 Vp-p
Input Return Loss Frequency <19 GHz 10 dB
Output Amplitude
Single-Ended, peak-to-peak 800 mVp-p
Differential, peak-to-peak 1600 mVp-p
Output High Voltage -15 mV
Output Low Voltage -815 mV
