FREQUENCY CONTROL PRODUCTS
S T R A T U M I I I M I N I A T U R E S U R F A C E M O U N T T C X O
D F A S 1 - K H Z ( 5 V ) & D F A S 1 - L H Z ( 3 . 3 V )
14.8±0.3
KEY FEATURES
5.08
5 to 52 MHz
Stratum III compliant over -40 to 85°C up to
38.88 Mhz
1.0
Sonet Minimum Clock compliant over
-40 to 85°C up to 52 MHz
APPLICATIONS
Stratum III & SMC
5.08
Function
NC
E / D
GND
Output
NC
DFA S1
1
2
3
4
5
6
6
1
5
2
4
3
PC board footprint
1.27
Vcc
TYPE
DFA S1-KHZ
DFA S1-LHZ
Frequency Range
5 to 20 MHz, soon to 38.88 MHz (BSM & ESM up to 52 MHz)
Standard Frequencies
12.8, 16.384, 19.44, 20, 34.368*, 38.88* & 44.736* MHz
ELECTRICAL SPECIFICATIONS
supply voltage
5 V ± 5 %
3.3 V ± 5 %
supply current ( no load)
≤ 20 mA
≤ 10 mA
output load
HCMOS 15 pF or 2 TTL
45/55...55/45 %
≤ 5 ns
≥ 4.5 V/ ≤ 0.5 V
≤ 10 ms @ 4.75 V
high or open = enable, low = high Z
HCMOS 15 pF or 2 TTL
45/55...55/45 %
≤ 5 ns
≥ 2.8 V/ ≤ 0.3 V
≤ 10 ms @ 3.15 V
high or open = enable, low = high Z
duty cycle @ 50% level
rise/fall times (10 to 90 %)
high/low levels or output amplitude
start-up
tri-state control on pin 2
FREQUENCY STABILITY
detailed tolerances [ ppm ]
temperature
range
model
code
stability versus:
temperature Vcc ± 5 %
overall
stability
Holdover
stability
24 hrs
drift
calibration
@ 25°C
type
ageing
Telcordia GR-1244 CORE Stratum III or ITU-T G.813 option 1
0 to 50°C AS3
0 to 70°C AS1001
-20 to 70°C CS3
-40 to 85°C ES3
≤ ± 3
≤ ± 4.6
all types
≤ ± 0.28
≤ ± 3.5
≤ ± 0.1
over
over
≤ ± 0.37
≤ ± 0.04
≤ ± 0.8
15 years 15 years
Telcordia GR-253 CORE SMC or ITU-T G.813 option 2
≤ ± 10
over
20 years 20 years
≤ ± 20
over
0 to 70°C BSM
all types
≤ ± 0.3
≤ ± 4.6
≤ ± 0.5
≤ ± 1
-40 to 85°C ESM
DEFINITIONS
24 hours drift
GR-1244-CORE, GR-253-CORE or G.813
24 hours holdover mode
Over full temperature range and Vcc ± 0.5 %
ORDERING CODE
type + option code + frequency + model code
Example
DFA S1-LHZ 19.44 MHz AS3
TYPE
DFA S1 STRATUM III
REVISION
08
CHECKED
NE
DATE
24.02.2006
PAGE
10