W320-03
Switching Characteristics[10] Over the Operating Range
Parameter
t1
Output
Description
Output Duty Cycle[11]
Test Conditions
Measured at 1.5V
Min.
45
Max.
55
Unit
%
All
t3
t3
t5
t5
t6
t7
t9
t9
t9
t9
USB, REF, DOT Falling Edge Rate
Between 2.4V and 0.4V
Between 2.4V and 0.4V
Measured at 1.5V
0.5
1.0
2.0
ps
PCI,3V66
3V66[0:1]
66BUFF[0:2]
PCI
Falling Edge Rate
4.0
V/ns
ps
3V66-3V66 Skew
500
175
500
3.5
66BUFF-66BUFF Skew
PCI-PCI Skew
Measured at 1.5V
ps
Measured at 1.5V
ps
3V66,PCI
3V66
3V66-PCI Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
3V66 leads. Measured at 1.5V
Measured at 1.5V t9 = t9A – t9B
Measured at 1.5V t9 = t9A – t9B
Measured at 1.5V t9 = t9A – t9B
Measured at 1.5V t9 = t9A – t9B
1.5
ns
250
350
500
1000
ps
USB, DOT
PCI
ps
ps
REF
ps
CPU 1.0V Switching Characteristics
t2
CPU
RiseTime
Measured differential waveform from
–0.35V to +0.35V
175
175
467
467
ps
ps
t3
CPU
Fall Time
Measured differential waveform from
–0.35V to +0.35V
t4
t8
CPU
CPU
CPU
CPU
CPU-CPU Skew
Measured at Crossover
150
150
325
1.45
ps
ps
mV
V
Cycle-Cycle Clock Jitter
Rise/Fall Matching
Measured at Crossover t8 = t8A – t8B
Measured with test loads[12]
Measured with test loads[12]
Voh
High-level Output Voltage
including overshoot
0.92
–0.2
0.51
Vol
CPU
CPU
Low-level Output Voltage
including undershoot
Measured with test loads[12]
Measured with test loads[12]
0.35
0.76
V
V
Vcrossover
Crossover Voltage
CPU 0.7V Switching Characteristics
t2
CPU
RiseTime
Measured single ended waveform from 175
0.175V to 0.525V
700
700
ps
ps
t3
CPU
Fall Time
Measured single ended waveform from 175
0.175V to 0.525V
t4
t8
CPU
CPU
CPU-CPU Skew
Measured at Crossover
150
150
ps
ps
Cycle-Cycle Clock Jitter
Measured at Crossover t8 = t8A – t8B
With all outputs running
CPU
CPU
Rise/Fall Matching
Measured with test loads[13, 14]
Measured with test loads[14]
20
%
V
Voh
Vol
High-level Output Voltage
including overshoot
0.85
CPU
CPU
Low-level Output Voltage
including undershoot
Measured with test loads[14]
Measured with test loads[14]
–0.15
0.28
V
V
Vcrossover
Crossover Voltage
0.43
Notes:
10. All parameters specified with loaded outputs.
11. Duty cycle is measured at 1.5V when V = 3.3V. When V = 2.5V, duty cycle is measured at 1.25V.
DD
DD
12. The 1.0V test load is shown on test circuit page.
13. Determined as a fraction of 2*(Trp – Trn)/(Trp +Trn) Where Trp is a rising edge and Trp is an intersecting falling edge.
14. The 0.7V test load is R = 33.2:, R = 49.9: in test circuit.
s
p
Rev 1.0,November 25, 2006
Page 8 of 16
SPECTRALINEAR [ SPECTRALINEAR INC ]
