Data Sheet

HMC674LC3C/HMC674LP3E

Rev. K | Page 5 of 14

TIMING DESCRIPTIONS

Table 6.

Parameter

Symbol

Description

Input to Output High Delay

The propagation delay measured from the time the input signal crosses the reference

(± the input offset voltage) to the 50% point of an output low to high transition.

Input to Output Low Delay

The propagation delay measured from the time the input signal crosses the reference

(± the input offset voltage) to the 50% point of an output high to low transition.

Latch Enable (LE/LE) to Output High Delay

The propagation delay measured from the 50% point of the latch enable (LE/LE)

signal high to low transition to the 50% point of an output low to high transition.

Latch Enable (LE/LE) to Output Low Delay

The propagation delay measured from the 50% point of the latch enable (LE/LE)

signal high to low transition to the 50% point of an output high to low transition.

Minimum Hold Time

The minimum time after the positive transition of the latch enable (LE/LE) signal

that the input signal must remain unchanged to be acquired and held at the outputs.

Minimum Latch Enable (LE/LE) Pulse Width

The minimum time that the latch enable (LE/LE) signal must be low to acquire an

input signal change.

Minimum Setup Time

The minimum time before the positive transition of the latch enable (LE/LE) signal

that an input signal change must be present to be acquired and held at the outputs.

Output Rise Time

The amount of time required to transition from a low to a high output as measured

at the 20% and 80% points.

Output Fall Time

The amount of time required to transition from a high to a low output as measured

at the 20% and 80% points.

Input Overdrive Voltage

Timing Diagram

LATCH ENABLE (LE)

DIFFERENTIAL

INPUT VOLTAGE

LATCH ENABLE (LE)

Q OUTPUT

Q OUTPUT

LATCH

TRACK

LATCH

LATCH

50%

50%

50%

TRACK

Figure 2. Timing Diagram