Data Sheet
FS6377-01/FS6377-01g Programmable 3-PLL Clock Generator IC
Table 13. AC Timing Specifications
Clock
(MHz)
Parameter
Overall
Symbol Conditions/Description
Min.
Typ.
Max.
Units
0.8
0.8
40
150
100
230
170
DD
V
V
V
V
= 5.5V
= 3.6V
= 5.5V
= 3.6V
Output Frequency*
MHz
O
f
f
DD
DD
DD
VCO Frequency*
VCO Gain*
MHz
MHz/V
µs
VCO
40
400
7
VCO
A
LFTC bit = 0
LFTC bit = 1
O
Loop Filter Time Constant*
20
1.9
1.6
1.8
1.5
L
V = 0.5V to 4.5V; C = 15pF
Rise Time*
Fall Time*
ns
ns
r
t
O
L
V = 0.3V to 3.0V; C = 15pF
O
L
V = 4.5V to 0.5V; C = 15pF
r
t
O
L
V = 3.0V to 0.3V; C = 15pF
Tristate Enable Delay*
Tristate Disable Delay*
1
1
8
8
ns
ns
PZL, PZH
t
t
t
PZL, PZH
t
Output active from power-up, via PD pin
After last register is written
100
µs
ms
Clock Stabilization Time*
STB
t
1
Divider Modulus
Feedback Divider
Reference Divider
Post Divider
See also Table 2
See also Table 8
8
1
1
2047
255
50
F
N
N
N
R
P
Clock Outputs (PLL A clock via CLK_A pin)
Ratio of pulse width (as measured from rising edge to
next falling edge at 2.5V) to one clock period
Duty Cycle*
100
100
45
55
%
On rising edges 500µs apart at 2.5V relative to an
L
XIN
F
R
ideal clock, C =15pF, f =14.318MHz, N =220, N =63,
45
PX
N
=50, no other PLLs active
y
Jitter, Long Term (σ (τ))*
ps
j(LT)
t
t
On rising edges 500µs apart at 2.5V relative to an
L
XIN
F
R
ideal clock, C =15pF, f =14.318MHz, N =220, N =63,
50
100
50
165
110
390
PX
N
=50, all other PLLs active (B=60MHz, C=40MHz,
D=14.318MHz)
From rising edge to the next rising edge at 2.5V,
L
XIN
F
R
PX
C =15pF, f =14.318MHz, N =220, N =63, N =50, no
other PLLs active
j(∆P)
Jitter, Period (peak-peak)*
ps
From rising edge to the next rising edge at 2.5V,
L
XIN
F
R
PX
C =15pF, f =14.318MHz, N =220, N =63, N =50, all
other PLLs active (B=60MHz, C=40MHz,
D=14.318MHz)
DD
A
Unless otherwise stated, V = 5.0V ± 10%, no load on any output, and ambient temperature range T = 0°C to 70°C. Parameters denoted with an asterisk ( * ) represent nominal
characterization data and are not currently production tested to any specific limits. Min. and Max. characterization data are ± 3σ from typical.
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