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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 LOGIC - SMT
1
HMC749LC3C
v06.0514
26 GHz, T FLIP-FLOP w/ RESET, PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
The HMC749LC3C is a T Flip-Flop 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-
two 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 HMC749LC3C are CML and
terminated on-chip with 50 ohms to the positive supply,
Vcc, and may be AC or DC coupled. The differential
CML outputs are source terminated to 50 ohms and may
also be AC or DC coupled. Outputs can be connected
directly to a 50 ohm Vcc-terminated system, while DC
blocking capacitors may be used if the terminating
system is 50 ohms to ground. The HMC749LC3C also
features an output level control pin, VR, which allows
for loss compensation or signal-level optimazation. the
HMC749LC3C 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 & Single-Ended Operation
Fast Rise and Fall Times: 18 / 17 ps
Low Power Consumption: 270 mW typ.
Programmable Differential
Output Voltage Swing: 600 - 1100 mV
Propagation Delay: 95 ps
Single Supply: 3.3 V
16 Lead Ceramic 3x3 mm SMT Package: 9 mm
2
Typical Applications
The HMC749LC3C is ideal for:
• Serial Data Transmission up to 26 Gbps
• High Speed Frequency Divider (up to 26 GHz)
• Broadband Test & Measurement
• RF ATE Applications
Electrical Specications, T
A
= +25 ºC, Vcc = 3.3 V, VR = 3.3 V
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage 3 3.3 3.6 V
Power Supply Current 82 mA
Maximum Clock Rate 26 GHz
Input Voltage Range Vcc - 1.5 Vcc + 0.5 V
Input Differential Range 0.1 2 Vp-p
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
