5
MOTOROLA
MC88915TFN55 and MC88915TFN70 (continued)
FREQUENCY SPECIFICATIONS (T
A
=–40° C to +85° C, V
CC
= 5.0 V ±5%)
Guaranteed Minimum
Symbol Parameter TFN70 TFN55 Unit
f
max
1
Maximum Operating Frequency (2X_Q Output) 70 55 MHz
Maximum Operating Frequency (Q0–Q4,Q5 Output) 35 27.5 MHz
1. Maximum Operating Frequency is guaranteed with the part in a phase–locked condition, and all outputs loaded with 50Ω terminated to V
CC
/2.
AC CHARACTERISTICS (T
A
=–40° C to +85° C, V
CC
= 5.0V ±5%, Load = 50Ω Terminated to V
CC
/2)
Symbol
Parameter Min Max Unit Condition
t
RISE/FALL
Outputs
Rise/Fall Time, All Outputs
(Between 0.2V
CC
and 0.8V
CC
)
1.0 2.5 ns Into a 50Ω Load
Terminated to V
CC
/2
t
RISE/FALL
1
2X_Q Output
Rise/Fall Time Into a 20pF Load, With Ter-
mination Specified in Note
2
0.5 1.6 ns t
RISE
: 0.8V – 2.0V
t
FALL
: 2.0V – 0.8V
t
PULSE
WIDTH
1
(Q0–Q4, Q5, Q/2)
Output Pulse Width: Q0, Q1, Q2, Q3, Q4,
Q5
, Q/2 @ V
CC
/2
0.5t
CYCLE
– 0.5
2
0.5t
CYCLE
+ 0.5
2
ns Into a 50Ω Load
Terminated to V
CC
/2
t
PULSE
WIDTH
1
(2X_Q Output)
Output Pulse Width: 66MHz
2X_Q @ 1.5V 50MHz
40MHz
0.5t
CYCLE
– 0.5
2
0.5t
CYCLE
– 1.0
0.5t
CYCLE
– 1.5
0.5t
CYCLE
+ 0.5
2
0.5t
CYCLE
+ 1.0
0.5t
CYCLE
+ 1.5
ns Must Use Termination
Specified in Note 2
t
PULSE
WIDTH
1
(2X_Q Output)
Output Pulse Width: 50–65MHz
2X_Q @ V
CC
/2 40–49MHz
66–70MHz
0.5t
CYCLE
– 1.0
2
0.5t
CYCLE
– 1.5
0.5t
CYCLE
– 0.5
0.5t
CYCLE
+ 1.0
2
0.5t
CYCLE
+ 1.5
0.5t
CYCLE
+ 0.5
ns Into a 50Ω Load
Terminated to V
CC
/2
t
PD
1,3
SYNC Input to Feedback Delay
(With 1MΩ from RC1 to An V
CC
)
ns See Note 4 and
SYNC Feedback (Measured at SYNC0 or 1 and
FEEDBACK Input Pins)
–1.05 –0.40
Figure 2 for Detailed
Explanation
(With 1MΩ from RC1 to An GND)
+1.25 +3.25
t
SKEWr
1,4
(Rising) See Note
5
Output–to–Output Skew Between Outputs
Q0–Q4, Q/2 (Rising Edges Only)
— 500 ps All Outputs Into a
Matched 50Ω Load
Terminated to V
CC
/2
t
SKEWf
1,4
(Falling)
Output–to–Output Skew Between Outputs
Q0–Q4 (Falling Edges Only)
— 500 ps All Outputs Into a
Matched 50Ω Load
Terminated to V
CC
/2
t
SKEWall
1,4
Output–to–Output Skew 2X_Q, Q/2,
Q0–Q4 Rising, Q5
Falling
— 750 ps All Outputs Into a
Matched 50Ω Load
Terminated to V
CC
/2
t
LOCK
5
Time Required to Acquire Phase–Lock
From Time SYNC Input Signal is
Received
1.0 10 ms Also Time to LOCK
Indicator High
t
PZL
6
Output Enable Time OE/RST to 2X_Q,
Q0–Q4, Q5
, and Q/2
3.0 14 ns Measured With the
PLL_EN Pin Low
t
PHZ
,t
PLZ
6
Output Disable Time OE/RST to 2X_Q,
Q0–Q4, Q5
, and Q/2
3.0 14 ns Measured With the
PLL_EN Pin Low
1. These specifications are not tested, they are guaranteed by statistcal characterization. See AC specification Note 1.
2. T
CYCLE
in this spec is 1/Frequency at which the particular output is running.
3. The T
PD
specification’s min/max values may shift closer to zero if a larger pullup resistor is used.
4. Under equally loaded conditions and at a fixed temperature and voltage.
5. With V
CC
fully powered–on, and an output properly connected to the FEEDBACK pin. t
LOCK
maximum is with C1 = 0.1µF, t
LOCK
minimum is with
C1 = 0.01µF.
6. The t
PZL
, t
PHZ
, t
PLZ
minimum and maximum specifications are estimates, the final guaranteed values will be available when ‘MC’ status is reached.