HMC679LC3C
v06.0514
HIGH SPEED LOGIC - SMT
26 GHz, T FLIP-FLOP w/ RESET &
PROGRAMMABLE OUTPUT VOLTAGE
Typical Applications
Features
The HMC679LC3C is ideal for:
Supports Clock Frequencies up to 26 GHz
• Serial Data Transmission up to 26 Gbps
Differential or Single-Ended Operation
• High Speed Frequency Divider (up to 26 GHz)
Fast Rise and Fall Times: 18 / 17 ps
• Broadband Test & Measurement
Low Power Consumption: 270 mW typ.
• RF ATE Applications
Programmable Differential Output Voltage Swing:
600 - 1100 mVp-p
Propagation Delay: 95 ps
Single Supply: -3.3 V
16 Lead Ceramic 3 x 3 mm SMT Package: 9 mm2
Functional Diagram
General Description
The HMC679LC3C is a T Flip-Flop w/Reset designed 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-bytwo 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 HMC679LC3C 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
HMC679LC3C also features an ouput level control pin,
VR, which allows for loss compensation or signal level
optimization. The HMC679LC3C operates from a single
-3.3 V supply and is available in ROHS-compliant 3x3
mm SMT package.
Electrical Specifications, TA = +25 ºC, Vee = -3.3 V, VR = 0 V
Parameter
Conditions
Power Supply Voltage
Min.
Typ.
Max
-3.6
-3.3
-3.0
Power Supply Current
82
Maximum Clock Rate
V
mA
26
GHz
Input Voltage Range
-1.5
0.5
V
Input Differential Range
0.1
2.0
Vp-p
Input Return Loss
Output Amplitude
1
Units
Frequency
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