stc3800 Connor-Winfield VCXOs, stc3800 Datasheet - Page 47

• Manufacturer Part Number: stc3800
• Description: Integrated - Stratum 3e Timing Source
• Manufacturer: Connor-Winfield VCXOs

Mechanical Specifications
Additional External Components
PCB Layout Recommendations
10. It is recommended that the connections of the JTAG, VPP and VPN pins be routed to pads, preferably in a SIL
1. Place series resistors (33 ohms) on all reference inputs.
2. Place series resistors (33 ohms) on SPI_IN and SPI_CLK inputs.
3. Place one .01uF at the input power pins.
4. One 4.7uF (25V) capacitor is required at the VPP pin.
5. One 4.7uF (25V) capacitor is required at the VPN pin.
1. Place .01 nF caps close to Vcc pins.
2. Place de-coupling and/or filter components as close to module pins as possible.
3. Ensure that only clean and well-regulated power is supplied to the module.
4. Isolate power and ground inputs to the module from noisy sources.
5. Must provide a separate power and ground trace to the oscillator that provides sufficient power to the oscillator.
6. Keep module signals away from sensitive or noisy analog and digital circuitry.
7. Avoid split ground planes as high-frequency return currents may be affected.
8. Allow extra spacing between traces of high-frequency inputs and outputs.
9. Keep all traces as short as possible - avoid meandering trace paths.
pattern as shown in Figure 16 below. It is recommended to use 0.1” center to center spacing.
Pad Corner
0.70 mm
A1 Ball
[0.03"]
0.35 mm
[0.01"]
0.25 mm
© Copyright 2001 The Connor-Winfield Corp. All Rights Reserved
[0.01"]
13.00 mm
TOP VIEW
[0.51"]
SQR
1
Preliminary Data Sheet #: TM061
Ø0.50 mm
JTAG/ISP Header Connections
[Ø0.02"]
Package Dimensions
unless otherwise indicated
All dimensions are ±10%
Figure 15
Figure 16
11.00 mm
[0.43"]
12 11 10
1.50 mm
[0.06"]
MAX
BOTTOM VIEW
8
9
Page 47 of 48
8
11.00 mm
[0.43"]
1.00 mm
7
[0.04"]
6
5
4
Specifications subject to change without notice
3
2
1
A
B
C
D
E
F
G
H
J
K
L
M
A1 Ball
Pad Corner
Rev: P06 Date: 11/22/04