Specifications
ispGDS
AC Switching Characteristics
Over Recommended Operating Conditions
COM
PARAMETER
TEST
COND.
A
A
A
A
DESCRIPTION
MIN.
Input to Output Delay
Maximum Input Frequency
Input Pulse Duration, High
Input Pulse Duration, Low
One Input Driving One Output
One Output Switching
1
—
10
10
MAX.
7.5
50
—
—
UNITS
ns
MHz
ns
ns
t
pd
f
max
t
wh
t
wl
Switching Waveforms
INP UT
VALID INPUT
t
w h
INP UT
t
wl
t
pd
OU TP U T
1/
f
max
Input to Output Delay
Input Pulse Width/ Fmax
Switching Test Conditions
Input Pulse Levels
Input Rise and Fall Times
Input Timing Reference Levels
Output Timing Reference Levels
Output Load
GND to 3.0V
2ns 10% – 90%
1.5V
1.5V
See Figure
FROM OUTPUT (O/Q)
UNDER TEST
TEST POINT
R
1
+5V
3-state levels are measured 0.5V from steady-state
active level.
Output Load Conditions (see figure)
Test Condition
A
R
1
470Ω
R
2
390Ω
C
L
50pF
R
2
C
L
*
*C
L
INCLUDES TEST FIXTURE AND PROBE CAPACITANCE
7
LATTICE [ LATTICE SEMICONDUCTOR ]
