Differential Positive ECL (DPECL)
SR-A29B0
Series
SR-A29B0 Series Rev G
Frequency Range: 250.0 MHz-1.7 GHz
Description
The SR-A29B0 Series of quartz crystal oscillators provide DPECL Fast Edge compatible
signals. This device is to operate using positive voltage and uses multiple ground pins for
improved signal integrity. This device is intended to operate on positive voltage for PECL
applications.
Features
Size, mm
• High Reliability - NEL HꢁLT/HꢁSS
qualified for crystal oscillator start-up
conditions
• Cover connected to ground
• 3.3V and 2.5V versions available
• Wide frequency range – 25ꢀ.ꢀMHz to
1.7GHz
9 x 14
I/O
8 pad
• User specified tolerance available
• Will withstand SMD reflow temperatures of
183°C for 4 minutes maximum
• High shock resistance, to 1ꢀꢀꢀg
Supply Voltage
3.3V / 2.5V
• Patent Pending, harmonic
multiplication for
Creating a Part Number
extremely low jitter
SR - A29BX - FREQ
Tolerance/Performance
• High frequency output
eliminates the need for
PLL multiplication
ꢀ
1
7
1ꢀꢀ ppm ꢀ-7ꢀ°C
5ꢀ ppm ꢀ-7ꢀ°C
25 ppm ꢀ-7ꢀ°C
Package Code
SR
8 pad 9x14 mm SMD
9 Customer Specific
Input Voltage
• Stabilities over
ꢁ
B
C
2ꢀ ppm ꢀ-7ꢀ°C
5ꢀ ppm -4ꢀ to ꢂ85°C
1ꢀꢀ ppm -4ꢀ to ꢂ85°C
Code
ꢁ
Specification
3.3 V
2.5 V
temperatures as low as
2ꢀppm eliminates SꢁW
oscillator temperature
problems
B
Drawing Specifications
Electrical Connections
Pin
1
2
3
4
5
6
7
8
Connection
VCC
Ground
NC or Ground
Q Output
/Q Output
Ground
Recommended Board Layout
Dimensions shown in inches (mm).
For the most up to date
specifications on each NEL
product, log on to our
website—www.nelfc.com
The metallic center pad was designed for
mechanical support. Grounding of this pad is
optional. It measures 0.088 x 0.190 NOM
(2.24 x 4.83 NOM).
Ground
Enable
357 Beloit Street, P.O. Box 457, Burlington, WI 531ꢀ5-ꢀ457 U.S.ꢁ.
Phone: 262-763-3591 Fax: 262-763-2881 Email: nelsales@nelfc.com www.nelfc.com