Data Sheet HMC974LC3C
Rev. C | Page 3 of 12
SPECIFICATIONS
T
A
= +25 °C, V
EE
= −3 V, V
CCI
= +3.3 V, V
CCO
= +2 V, V
TERM
= 0 V, V
CM
= 0 V, V
OD
1
= 50 mV.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DC INPUT CHARACTERISTICS
Offset Voltage −10 ±4 +10 mV
Bias Current −30 +20 +30 μA WIT pin termination open
Differential Voltage −2 +2 V Measured between the WIN pin voltage and
the RT pin voltage or RB pin voltage
Input Impedance
WIN pin to WIT pin 50 Ω
RT pin to WIT pin 50 Ω
RB pin to WIT pin 50 Ω
Common Mode Input Voltage Range −1.5 +1.5 V WIT to GND
Input Capacitance 1 pF
LATCH ENABLE CHARACTERISTICS
LE and
LE
Input Low Voltage (V
IL
) 1.6 V
Input High Voltage (V
IH
) 2.2 V
LE and
LE
Impedance 7.8 kΩ If not driven, the device is unlatched
DC OUTPUT CHARACTERISTICS
High Level, V
OH
(50 Ω to 0 V) 1.06 V
Low Level, V
OL
(50 Ω to 0 V 0.73 V
Output Voltage Swing 320 365 410 mV
AC PERFORMANCE
Propagation Delay Dispersion vs. V
OD
20 ps For V
OD
> 50 mV
Rise Time (ORB, WOUTB, URB), t
R
25.3 ps 20% to 80%
Fall Time (ORB, WOUTB, URB), t
F
21.9 ps 80% to 20%
Minimum Detectable Pulse Width 60 ps V
CM
= 0 V; ±100 mV overdrive voltage
Equivalent Input Bandwidth
2
Input to Output Delay, t
PD
88 ps
Latch to Output Delay, t
PD
83 ps
Maximum Input Slew Rate 5 V/ns
Noise (Referred to Input) 6 nV/ √(Hz)
At 5 Gbps with ±100 mV overdrive
Deterministic Jitter (Peak-to-Peak) 2 ps At 5 Gbps with ±100 mV overdrive
POWER SUPPLIES (INCLUDING LOAD)
Positive Supply Voltage Input Stage (V
CCI
) 3.135 3.3 3.465 V
Positive Supply Voltage Output Stage (V
CCO
) 1.8 3.3 3.465 V
Negative Power Supply (V
EE
) −3.15 −3.0 −2.85 V
Positive Supply Current Input Stage (I
CCI
) 13.4 14.9 16.5 mA
Positive Supply Current Output Stage (I
CCO
) 70 72.3 79.6 mA
Negative Current (I
EE
) 28.3 29.9 31.6 mA
D
1
V
OD
is the input overdrive voltage, for example, V
WIN
− V
RT
= V
OD
or V
WIN
− V
RB
= V
OD
.
2
Equivalent input bandwidth is calculated with the following formula: B
WEQ
= 0.22∕√(TR
COMP
2
− TR
IN
2
), where B
WEQ
is the equivalent bandwidth formula, TR
IN
is the 20% to
80% transition time of a quasi Gaussian signal applied to the comparator input, and TR
COMP
is the effective transition time digitized by the comparator.
