mpc9894 ETC-unknow, mpc9894 Datasheet - Page 21

• Manufacturer Part Number: mpc9894
• Description: Quad Input Redundant Idcs Clock Generator
• Manufacturer: ETC-unknow

Advanced Clock Drivers Devices
Freescale Semiconductor
10. Rate of period change is the maximum change of the clock output signal period T per cycle on a IDCS commanded switch.
11. Rate of period change is the maximum change of the clock output signal period T per cycle on a IDCS commanded switch.
12. –3 dB point of PLL transfer characteristics.
Table 39. AC Characteristics (T
V
MR
t
t
t
LOCK
reset_ref
reset_pulse
1. AC characteristics are design targets and pending characterization.
2. AC characteristics apply for parallel output termination of 50 Ω to V
3. In bypass mode, the MPC9894 divides the input reference clock.
4. The input reference frequency must match the VCO lock range divided by the total feedback divider ratio: f
5. All Input Clock frequencies must be within this value to guarantee smooth phase transition on input clock switch.
6. V
7. V
8. V
9. V
DD
Symbol
clock (see IDCS).
clock (see IDCS).
and PLL Lock
= 3.3 V ±5%, V
PP
PP
PP
DDAB
,
,
is the minimum differential input voltage swing required to maintain AC characteristics including tpd and device-to-device skew.
OK
NOK
= V
is the minimum differential input voltage swing required for a valid clock signal. Above V
is the maximum differential input voltage swing for a guaranteed bad clock. Below V
DDCD
Maximum PLL Lock Time
MR
MR
Pulse Generator
DDAB,CD,IC
hold time on power up
hold time
Pulse Generator
Differential
Z = 50 Ω
Differential
Z = 50 Ω
= 3.3 V ±5% or V
Characteristics
J
= –40°C to +110°C)
Figure 8 . MPC9894 AC Test Reference (Media = 1)
Figure 7. MPC9894 AC Test Reference (Media = 0)
RT = 50 Ω
Z = 50 Ω
V
DDAB,CD,IC
TT
Z = 50 Ω
RT = 50 Ω
V
TT
= 2.5 V ±5%
(1) (2)
(Continued)
TT
Min
100
2
.
DUT MPC9894
DUT MPC9894
Typ
Max
10
PP, NOK
Z = 50 Ω
PP, OK
RT = 50 Ω
Z = 50 Ω
the input will be detected as a failed
the input will be detected as a good
Unit
µs
ps
ns
RT = 100 Ω
REF
= (f
VCO
Condition
÷ M) ⋅ N.
V
TT
MPC9894
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