7.0 Electrical and Mechanical Specifications
CN8478/CN8474A/CN8472A/CN8471A
7.2 Timing and Switching Specifications
Multichannel Synchronous Communications Controller (MUSYCC™)
Table 7-10. PCI I/O Measure Conditions
Symbol
Parameter
Value
0.6 Vdd
0.2 Vdd
0.4 Vdd
0.4 Vdd
1
Unit
V
Voltage Threshold High(1)
Voltage Threshold Low(1)
Voltage Test Point
Vth
Vtl
V
Vtest
Vmax
—
V
Maximum Peak-to-Peak(2)
Input Signal Edge Rate
V
V/ns
NOTE(S):
(1)
The input test is done with 0.1 Vdd of overdrive (over Vih and Vil). Timing parameters must be met with no more overdrive
than this. Production testing can use different voltage values, but must correlate results back to these parameters.
Vmax specifies the maximum peak-to-peak voltage waveform allowed for measuring input timing. Production testing can use
different voltage values, but must correlate results back to these parameters.
(2)
Figure 7-3. PCI Output Timing Waveform
V
th
PCLK
V
test
V
tl
T
val
Output
Delay
V
test
Output Current ≤ Leakage Current
Three-state
Output
T
on
T
off
8478_026
7-8
Conexant
100660E
CONEXANT [ CONEXANT SYSTEMS, INC ]
