68.256 MHz SAW Filter
2.4 MHz Bandwidth
Part Number 074949-518
IDT •
••
• SAW Products •
••
• 324 Clark Street, Worcester, MA 01606, USA •
••
• Ph 1-508-852-5400 •
••
• Fax 1-508-852-8456
www.idt.com
DS074949-518 Rev - 30-Apr-2008
ECN 35965 Page 1 of 3
DESCRIPTION
• 68.256 MHz SAW bandpass filter with 2.4 MHz bandwidth.
• 35.05 X 20.6 mm 8-pin DIP package.
• RoHS compliant.
TYPICAL PERFORMANCE
S11 (63.26-73.26 MHz) S22 (63.26-73.26 MHz)
Horizontal: Frequency 1 MHz / div
Vertical (from top): Magnitude 10 dB/div
Magnitude 1 dB/div
Phase Deviation 2 deg/div
Group Delay Deviation 50 ns/div
68.256 MHz SAW Filter
2.4 MHz Bandwidth
Part Number 074949-518
IDT •
••
• SAW Products •
••
• 324 Clark Street, Worcester, MA 01606, USA •
••
• Ph 1-508-852-5400 •
••
• Fax 1-508-852-8456
www.idt.com
DS074949-518 Rev - 30-Apr-2008
ECN 35965 Page 2 of 3
SPECIFICATION
Parameter Min Typ Max Units
Center Frequency, F
C
1
67.056 68.256 69.456 MHz
Insertion Loss 32 33.6 36 dB
1 dB Bandwidth 2.4 3.08 - MHz
3 dB Bandwidth 3.7 3.86 4.1 MHz
20 dB Bandwidth 5.6 5.81 6.2 MHz
35 dB Bandwidth 6.3 6.43 7 MHz
Phase Linearity (Fc +/- 1.85 MHz) - 2 4 deg p-p
Phase Linearity (Fc +/- 2.4 MHz) - 5 10 deg p-p
Lower 3 dB Frequency Fc-2.05 - Fc-1.85 MHz
Upper 3 dB Frequency Fc+1.85 - Fc+2.05 MHz
Lower 20 dB Frequency Fc-3.1 - Fc-2.8 MHz
Upper 20 dB Frequency Fc+2.8 - Fc+3.1 MHz
Lower 35 dB Frequency Fc-3.5 - Fc-3.15 MHz
Upper 35 dB Frequency Fc+3.15 - Fc+3.5 MHz
Absolute Delay 2.4 2.45 2.5 us
Group Delay Ripple (Fc +/- 1.85 MHz) - 30 100 ns p-p
Rejection (30 to Fc-3.5 MHz)
2
35 42 - dB
Rejection (Fc+3.5 to 150 MHz)
2
35 42 - dB
Input VSWR (Fc +/- 1.2 MHz) - 1.4 1.5 :1
Output VSWR (Fc +/- 1.2 MHz) - 1.4 1.5 :1
Source and Load Impedance 50 ohms
Ambient Temperature - 25 - ˚C
Notes: 1. Reference frequency. Computed as mean of the 3 dB frequencies.
2. All dB values are referenced to the insertion loss value.
MAXIMUM RATINGS
Parameter Min Max Units
Storage Temperature Range
-40 85 ˚C
Operating Temperature Range
-18 63 ˚C
Input Power Level
- 10 dBm
MATCHING CIRCUIT
Notes:
• Device is internally matched. No external matching components are required.
Input
50 Ω
Single ended
Output
50 Ω
Single ended
8 4
7 5
GND
GND
68.256 MHz SAW Filter
2.4 MHz Bandwidth
Part Number 074949-518
IDT •
••
• SAW Products •
••
• 324 Clark Street, Worcester, MA 01606, USA •
••
• Ph 1-508-852-5400 •
••
• Fax 1-508-852-8456
www.idt.com
DS074949-518 Rev - 30-Apr-2008
ECN 35965 Page 3 of 3
PACKAGE OUTLINE
All specifications are believed to be accurate and reliable. However, MNC reserves the right to make changes without notice.
© 200
8
All rights reserved.
Registered
Units:
mm
Tolerances are typically ±0.15 mm
except where indicated.
Pad Configuration:
Input: 8
Input return: 7
Output: 4
Output return: 5
Ground: All other pins