Features: • Supports AT&T TR62411 and Bellcore GR-1244-CORE Stratum 3, Stratum 4 Enhanced and Stratum 4 timing for DS1 interfaces
• Supports ITU-T G.813 Option 1 clocks for 2048 kbit/s interfaces
• Supports ITU-T G.812 Type IV clocks for 1,544 kbit/s interfaces and 2,048 kbit/s interfaces
• Supports ETSI ETS 300 011, TBR 4, TBR 12 and TBR 13 timing for E1 interfaces
• Selectable 19.44 MHz, 1.544MHz, 2.048MHz or 8kHz input reference signals
• Provides C1.5, C2, C4, C6, C8, C16, and C19 (STS-3/OC3 clock divided by 8) output clock signals
• Provides 5 styles of 8 KHz framing pulses
• Holdover frequency accuracy of 0.05 PPM
• Holdover indication
• Attenuates wander from 1.9Hz
• Fast lock modeApplication• Synchronization and timing control for multitrunk T1,E1 and STS-3/OC3 systems
• ST-BUS clock and frame pulse sourcesPinout
Specifications
| |
Parameter |
Symbol |
Min |
Max |
Units |
| 1 |
Supply voltage |
VDD |
-0.3 |
7.0 |
V |
| 2 |
Voltage on any pin |
VPIN |
-0.3 |
VDD+0.3 |
V |
| 3 |
Current on any pin |
IPIN |
|
30 |
mA |
| 4 |
Storage temperature |
TST |
-55 |
125 |
|
| 5 |
48 SSOP package power dissipation |
PPD |
|
200 |
mW |
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.DescriptionThe MT9045 T1/E1/OC3 System Synchronizer contains a digital phase-locked loop (DPLL), which provides timing and synchronization signals for multitrunk T1 and E1 primary rate transmission links and STS-3/OC3 links.
The MT9045 generates ST-BUS clock and framing signals that are phase locked to either a 19.44 MHz, 2.048MHz, 1.544MHz, or 8kHz input reference.
The MT9045 is compliant with AT&T TR62411 and Bellcore GR-1244-CORE Stratum 3, Stratum 4 Enhanced, and Stratum 4 and ETSI ETS 300 011; and ITU-T G.813 Option 1 for 2048 kbit/s interfaces. It will meet the jitter/wander tolerance, jitter/wander transfer, intrinsic jitter/wander, frequency accuracy, capture range, phase change slope, holdover frequency and MTIE requirements for these specifications.
MT9045 Data Sheet
