SM8707 Datasheet, PDF (13/20 Pages) Nippon Precision Circuits Inc – Clock Generator with Dual PLLs

SM8707 series
SM8707L
f_XTAL = 27.0000MHz, V_DD = 3.3V ± 0.3V, V_SS = 0V, Ta = – 40 to + 85 °C unless otherwise noted.
Parameter
Symbol
Pins
Condition
Rating
Unit
min
typ
max
External input clock
frequency¹
f_XTI
XTI
Applies to external clock input use only – 27.0000 –
MHz
Output clock rise time²
t_r
MO1, MO2, SO1, C_L = 15 pF, transition between V_OL =
SO2, AO1, AO2 0.2V_DD and V_OH = 0.8V_DD
–
2.0
–
ns
Output clock fall time²
t_f
MO1, MO2, SO1, C_L = 15pF, transition between V_OH =
SO2, AO1, AO2 0.8V_DD and V_OL = 0.2V_DD
–
2.0
–
ns
Output clock jitter³
t_jitter
(1-sigma)
MO1, MO2
SO1, SO2,
AO1, AO2
Ta = 25°C, C_L = 15pF, V_O = 0.5V_DD
–
20
–
ps
–
60
–
ps
Output clock duty cycle²
Dt
MO1, MO2, SO1,
SO2, AO1, AO2
Ta = 25°C, C_L = 15pF, V_O = 0.5V_DD
45
50
55
%
Settling time²
t_S
All outputs
excluding XTO
–
–
1
µs
Power-up time^{2, 4}
t_P
All outputs
excluding XTO
–
1
5
ms
1. When using an external clock input, the XTI duty should be 50% with 3.3V clock signal amplitude level. The input signal voltage should not exceed the
absolute maximum rating, otherwise damage may occur.
2. The numeric values are measured values obtained using the circuit in Figure 1 and the NPC standard evaluation board.
3. The numeric values are measured values obtained using the circuit in Figure 2 and the NPC standard evaluation board.
4. This is the time, after the supply is turned ON from the OFF state, until the output clock reaches ± 0.1% of the specified frequency.
27MHz
DUT
DUT:Device under test
Active Probe
(HP1152A)
Passive Probe
(HP10435A)
Oscilloscope
(Infinium
HP54845A)
Frequency &
Time Interval
Analyzer
(HP5371A)
Figure 1. Measurement circuit 1
27MHz
DUT
Active Probe
(HP54701A)
DUT:Device under test
Oscilloscope
(HP54720D
+HP54721A)
Jitter
Measurement
System
(ASA, M1)
Figure 2. Measurement circuit 2
NIPPON PRECISION CIRCUITS INC.—13