MT9044AP Mitel, MT9044AP Datasheet
MT9044AP
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MT9044AP Summary of contents
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... LOS1 Control State Machine LOS2 MS1 MS2 T1/E1/OC3 System Synchronizer DS5058 MT9044AP MT9044AL Description The MT9044 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-3/0C3 links. ...
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MT9044 VDD 7 OSCo 8 OSCi 9 VSS 10 F16o 11 MT9044 12 RSP 13 F0o TSP 14 F8o 15 C1. AVDD ...
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Advance Information Pin Description (continued) Pin # Pin # Name PLCC MQFP 12 6 RSP Receive Sync Pulse (CMOS Output). This is an 8kHz 488ns active high framing pulse, which marks the end of an ST-BUS frame. This is typically ...
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MT9044 Pin Description (continued) Pin # Pin # Name PLCC MQFP 34 28 LOS1 Primary Reference Loss (TTL Input). Typically, external equipment applies a logic high to this input when the PRI reference signal is lost or invalid. The logic ...
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Advance Information Functional Description The MT9044 is a Multitrunk System Synchronizer, providing timing (clock) and synchronization (frame) signals to interface circuits for T1 and E1 Primary Rate Digital Transmission links. Figure 1 shows the functional block diagram which is described ...
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MT9044 from Normal to Holdover. In Holdover Mode, the DPLL no longer uses the virtual reference signal, but generates an accurate clock signal using storage techniques. The Compare Circuit then measures the phase delay between the current phase (feedback signal) ...
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Advance Information In Normal Mode, the DCO provides an output signal which is frequency and phase locked to the selected input reference signal. In Holdover Mode, the DCO is free running at a frequency equal to the last (less 30ms ...
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MT9044 Input Impairment Monitor This circuit monitors the input signal to the DPLL and automatically enables the (Auto-Holdover) when the frequency of the incoming signal is outside the auto-holdover capture range (See AC Electrical Characteristics - Performance). This includes a ...
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Advance Information MS2 MS1 Control 0 0 MANUAL 0 1 MANUAL 1 0 MANUAL 1 1 AUTO State Machine Control Table 3 - Operating Modes and States Manual Control Manual Control should be used when either very simple MT9044 control ...
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MT9044 master clock may have a temperature coefficient of 0.1ppm per degree degree change in temperature, while the MT9044 is in Holdover Mode may result in an additional offset (over the 0.05ppm) in frequency accuracy of ...
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Advance Information Description Input Controls MS2 MS1 RSEL GTi Legend Change / Not Valid ...
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MT9044 Description Input Controls LOS2 LOS1 GTi RST Legend Change MTIE State ...
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Advance Information MT9044 Measures of Performance The following are some synchronizer performance indicators and their corresponding definitions. Intrinsic Jitter Intrinsic jitter is the jitter produced synchronizing circuit and is measured at its output measured by applying a reference ...
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MT9044 locked to an external reference signal, but is operating using storage techniques. MT9044, the storage value is determined while the device is in Normal Mode and locked to an external reference signal. The absolute Master Clock (OSCi) accuracy of ...
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Advance Information MT9044 and Network Specifications The MT9044 fully meets all requirements (intrinsic jitter/wander, jitter/wander tolerance, jitter/wander transfer, frequency accuracy, frequency holdover accuracy, capture range, phase change slope and MTIE rearrangement) for the following specifications. 1. Bellcore GR-1244-CORE June 1995 ...
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MT9044 Rise & Fall Time: 8ns (0.5V 4.5V 50pF) Duty Cycle: 45% to 55% The output clock should be connected directly (not AC coupled) to the OSCi input of the MT9044, and the OSCo output should be left open as ...
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Advance Information MT9044 GTo R C 150k GTi Figure 12 - Unsymmetrical Guard Time Circuit Figure 13 shows a typical timing example of an unsymmetrical Guard Time Circuit with the MT9044 in Automatic Control. ...
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MT9044 Reset Circuit A simple power up reset circuit with about a 50us reset low time is shown in Figure 14. Resistor R for protection only and limits current into the RST pin during power down conditions. The reset low ...
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Advance Information To Line 1 MT9075 DSTo TTIP To DSTi TX Line TRING XFMR F0i RTIP C4i To RRING RX Line RxFP XFMR LOS To Line 2 MT9075 DSTo TTIP DSTi To TRING TX Line XFMR F0i RTIP C4i RRING ...
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MT9044 To E1 Line MT9075 DSTo TTIP DSTi To TX Line TRING XFMR F0i RTIP C4i To RRING RX Line RxFP XFMR LOS MT90840 To OC3 Line STo0-7 PDo0-7 STi0-7 To PPFTo TX Line XFMR F0i PDi0-7 C4b To PCKR ...
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Advance Information Absolute Maximum Ratings* - Parameter 1 Supply voltage 2 Voltage on any pin 3 Current on any pin 4 Storage temperature 5 PLCC package power dissipation 6 MQFP package power dissipation * Exceeding these values may cause permanent ...
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MT9044 AC Electrical Characteristics - Performance Characteristics 1 Freerun Mode accuracy with OSCi at Holdover Mode accuracy with OSCi at Capture range with OSCi at Phase lock time 11 Output phase ...
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Advance Information AC Electrical Characteristics - Input/Output Timing Characteristics 1 Reference input pulse width high or low 2 Reference input rise or fall time 3 8kHz reference input to F8o delay 4 1.544MHz reference input to F8o delay 5 2.048MHz ...
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MT9044 PRI/SEC 8kHz PRI/SEC 1.544MHz PRI/SEC 2.048MHz F8o NOTES: 1. Input to output delay values are valid after a TRST or RST with no further state changes Figure 19 - Input to Output Timing (Normal Mode) F8o F0o F16o t ...
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Advance Information F8o C2o RSP TSP F8o MS1,2 LOS1,2 RSEL, GTi Figure 22 - Input Controls Setup and Hold Timing AC Electrical Characteristics - Intrinsic Jitter Unfiltered Characteristics 1 Intrinsic jitter at F8o (8kHz) 2 Intrinsic jitter at F0o (8kHz) ...
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MT9044 AC Electrical Characteristics - C1.5o (1.544MHz) Intrinsic Jitter Filtered Characteristics 1 Intrinsic jitter (4Hz to 100kHz filter) 2 Intrinsic jitter (10Hz to 40kHz filter) 3 Intrinsic jitter (8kHz to 40kHz filter) 4 Intrinsic jitter (10Hz to 8kHz filter) † ...
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Advance Information AC Electrical Characteristics - 2.048MHz Input to 2.048 MHz Output Jitter Transfer Characteristics 1 Jitter at output for 1Hz@3.00UIpp input 2 with 40Hz to 100kHz filter 3 Jitter at output for 3Hz@2.33UIpp input 4 with 40Hz to 100kHz ...
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MT9044 AC Electrical Characteristics - 1.544MHz Input Jitter Tolerance Characteristics 1 Jitter tolerance for 1Hz input 2 Jitter tolerance for 5Hz input 3 Jitter tolerance for 20Hz input 4 Jitter tolerance for 300Hz input 5 Jitter tolerance for 400Hz input ...
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Advance Information † Notes: Voltages are with respect to ground (V ) unless otherwise stated. SS Supply voltage and operating temperature are as per Recommended Operating Conditions. Timing parameters are as per AC Electrical Characteristics - Timing Parameter Measurement Voltage ...
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... Mitel. This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specifi ...