844S012 Datasheet, PDF (9/24 Pages) Integrated Device Technology – Crystal-to-LVDS/LVCMOS Frequency Synthesizer

844S012 Data Sheet
CRYSTAL-TO-LVDS/LVCMOS FREQUENCY SYNTHESIZER
AC Electrical Characteristics
Table 6. AC Characteristics, V_DD = V_DDOB = V_DDOC = T_A = -40°C to +85°C
Symbol Parameter
Test Conditions
f_OUT
Output
Frequency
QA[0:1], nQA[0:1]
QB[0:6]
QC
tsk(b)
Bank Skew
NOTE 1, 2
QB[0:6]
QA[0:1], nQA[0:1]
LVCMOS Outputs off
tsk(o) Output Skew; NOTE 2, 3
Across Banks B and C
at Same Frequency
QA[0:1], nQA[0:1]
All Outputs at the Same Frequency,
REF_OE = 0
tjit(cc)
Cycle-to-Cycle
Jitter; NOTE 2
QB[0:6]
All Outputs at the Same Frequency,
REF_OE = 0
QC
All Outputs at the Same Frequency,
REF_OE = 0
QA[0:1], nQA[0:1]
All Outputs at the Same Frequency,
REF_OE = 0
tjit(per)
RMS
Period Jitter
QB[0:6], QC
QBx, QC = 33.33MHz,
QAx, nQAx = 100MHz,
REF_OE = 0
All Outputs at the same Frequency,
REF_OE = 0
F_M
SSC Modulation QA[0:1], nQA[0:1]
Frequency
QB[0:6], QC
t_L
PLL Lock Time
SSC off
SSC on
t_R / t_F
Output
Rise/Fall Time
QB[0:6], QC
QA[0:1], nQA[0:1]
20% to 80%
20% to 80%
QA[0:1], nQA[0:1]
LVCMOS Outputs OFF
odc
Output
Duty Cycle
QB[0:6], QC
Output Frequency  133.33MHz
QB[0:6], QC
Output Frequency > 133.33MHz
Minimum
100
33.33
33.33
29
150
65
48
48
46
Typical
Maximum
250
200
200
60
10
620
55
80
50
9
17
11
33.33
100
2.1
450
250
52
52
54
Units
MHz
MHz
MHz
ps
ps
ps
ps
ps
ps
ps
ps
ps
kHz
ms
s
ps
ps
%
%
%
NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device
is mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal
equilibrium has been reached under these conditions.
NOTE 1: Defined as skew within a bank of outputs at the same supply voltage and with equal load conditions.
NOTE 2: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 3: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at V_DDOB/2.
844S012 REVISION B 08/25/15
9
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